Neptune Service Manual

NEPTUNE ELECTRONIC VENTILATOR

TECHNICAL MANUAL

2nd edition January 2006

MEDEC BENELUX NV

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronically, mechanically, by photocopying, recording or otherwise, without the prior written permission of Medec Benelux NV. Medec Benelux NV reserves the right to change specifications without prior notification. Careful attention has been paid to the compilation of this publication. Medec Benelux NV Lion D’Orweg 19 9300 Aalst Belgium Telephone : (32) 53 / 70.35.44 Fax : (32) 53 / 70.35.33 Website : www.medecbenelux.be E-mail : [email protected] 2nd edition January 2006

User responsibility

The equipment described in this manual has been built to confirm with the specifications and instructions stated in this manual. To ensure proper and safe operation of the equipment, it must be checked and serviced at least according to the minimum standards laid out in this manual. The equipment must be repaired and serviced only in accordance with written instructions issued by Medec Benelux N.V. and must not be altered or modified in any way without written approval of Medec Benelux N.V. The user of this equipment shall have the responsibility for any malfunction which results from improper use, maintenance, repair, damage or alteration by anyone other than Medec Benelux N.V. or its appointed agents. The Neptune anaesthesia combination has been specially developed for anaesthetic applications. The system is built around the so-called bag in bottle principle. This system has for many years proved to be a reliable and safe system. One important aspect in this connection is that the gas exchange of the patient is completely separated from the machine by use of the bag mentioned. Another important aspect is that the Neptune anaesthesia system, whatever catastrophe might occur (compressed air, mains voltage failure or technical problems), always goes into the spontaneous / manual respiration mode. This way, the (manual) respiration of the patient is always guaranteed as long as the fresh gas supply is assured. The Neptune anaesthesia system may only be used in anaesthetic rooms which are conducting and are provided with proper ventilation and electrical wiring. The Neptune anaesthesia system may only be used in anaesthetic rooms conform with EN60601-1-2 level. RS232 output (optional) may only be used with devices conform with EN60601-1-2 level.

Table of Contents

1. Electronic system 1.1 Electronic system overview 1 1.2 Power supply 1.2.1 Replacing the AC mains fuses 5 1.2.2 Block diagram 5 1.2.3 Schematic diagram 8 1.2.4 Power supply board layout 11 1.3 Backplane board 1.3.1 Block diagram 12 1.3.2 Schematic diagram 14 1.3.3 Backplane board layout 16 1.4 MMI board 1.4.1 Block diagram 17 1.4.2 Schematic diagram 19

1.4.3 MMI board layout 25 1.4.4 Build-in test software 27 1.4.5 Graphics display 53 1.5 O2 measurement 1.5.1 General 54

1.5.2 Operation 54 1.5.3 O2 measurement specifications 55 1.6 Master board 1.6.1 Block diagram 56 1.6.2 Schematic diagram 58 1.6.3 Build-in test software 61 1.6.4 Master board layout 69 1.7 Pneumatic board 1.7.1 Block diagram 70 1.7.2 Schematic diagram 72 1.7.3 Built-in test software 77 1.7.4 Pneumatic board layout 85 2. Pneumatic system 2.1 Pneumatic diagram 86 2.2 Manual/Spontaneous mode (MAN) 88 2.3 Controlled mandatory ventilation (CMV) 90 2.4 Pressure controlled ventilation (PCV) 92 2.5 Peep 94 2.6 Flush safety 94 2.7 Mechanical construction 2.7.1 Patient breathing unit 95 2.7.2 Bottle 99 2.7.3 Supply tank 101 2.7.4 Solenoid valves 102

3. Maintenance and calibration 3.1 Visual inspection 103 3.2 Battery backup 104 3.3 The calibration menu 105 3.4 The pressure transducers 108 3.5 The pressure regulators 113 3.6 The flow regulators 116 3.7 O2 flush 118 3.8 The input pressure switches 119 3.9 The bottle safety valve 124 3.10 Peep valve calibration 125 3.11 Valve test 127 3.12 Performing a leaktest 3.12.1 Entering the leaktest menu 130 3.12.2 Performing the leaktest 132 3.12.3 Leaving the leaktest menu 135 3.13 Maintenance instructions 136 3.14 Parts list 141 4. Classification and discard 4.1 Classification 142 4.2 Discard 143 5. Inspection 5.1 Visual inspection 144 5.2 Other inspections 145 6. Troubleshooting 148 A. Checklist Neptune 165 B. List replaced parts 166

Neptune ventilator Technical manual 1

1. ELECTRONIC SYSTEM

1.1 ELECTRONIC SYSTEM OVERVIEW The Neptune contains several electronic printed circuit boards, which are located on different locations in the machine.

Electronic system overview


• Mains AC input The AC inlet at the back of the ventilator contains a fuse holder and power switch. The AC mains voltage is connected to the AC/DC converter board.

• AC/DC converter board

The AC/DC converter board converts the AC mains voltage to +24V DC voltage. The +24V DC is fully isolated from the AC mains voltage to ensure safe working conditions.

• DC/DC power supply

The DC/DC power supply board generates different DC voltages and controls the battery charging current. A special battery controller device will charge the battery as safe as possible and under the best conditions to have a long battery lifetime. The DC/DC power supply output voltages are:

o +5V DC o +12V DC o +24V DC o +12V DC

• Extendable system set

The extendable system set consists of 4 different boards that are connected by means of 2 elevated multiple pins connectors:

o MMI board o Backplane board o Master board o Pneumatic board

The 4 different boards have their own specific tasks. The MMI board, master board and the pneumatic board have one or more microprocessors and other electronic devices on board. The backplane board only contains connectors and has no microprocessor. The extendable system set is built so that further expansion of the electronics is possible by means of the elevated multiple pins connectors.

• Backplane board

The backplane board contains buzzer, O2 sensor, power switch and power supply connectors. The power connector is connected to the DC/DC power supply. The board is distributing the different DC voltages through the extendable system set.


• MMI board

The MMI board contains only one microprocessor. It’s reprogrammable so it can be upgraded if necessary. The microprocessor controls all the graphical display functions and is communicating - by means of the master board - with the pneumatic board. The microprocessor is also controlling the keyboard board, the control knob and the speaker.

• Master board

The master board contains one microprocessor and is also reprogrammable if necessary. The master board looks after the communication between the MMI board and pneumatic board. The master board microprocessor checks the proper working of the MMI and pneumatic board microprocessors. Otherwise, the MMI board microprocessor checks the proper working of the master and pneumatic board microprocessor and the pneumatic board microprocessor checks the MMI and master board microprocessors. Each microprocessor is checking the other microprocessors for errors or malfunctions, which makes the ventilator a very safe system. Once an error is found, the electronics stop working and a continuous beep is audible.

Note: The ventilator automatically switches over to manual mode after an error or malfunction is detected.

• Pneumatic board

The pneumatic board contains one microprocessor. This microprocessor is reprogrammable for upgrades if necessary. The pneumatic board of course controls the pneumatic functions of the ventilator. There are six pressure transducers mounted on the board for measuring all kinds of parameters. The pneumatic board also drives the electrical valves on the manifold and bottle. The microprocessor receives settings from the MMI board and processes the values. The pneumatic board microprocessor sends information back to the MMI board like e.g.: actual airway pressure, alarms, patient status values, etc.

• Keyboard board

The keyboard board contains several switches and leds for interaction between the operator and the electronic system. The keyboard board is connected to the MMI board and processed by the microprocessor on the MMI board.


• Graphical display

The graphical display shows all kind of information. It consists of menus, settings, parameters, graphs, etc. The display is also responsible for interaction between the operator and the ventilator electronics. Along with the keyboard switches and leds, they form the operator’s interface.


1.2 POWER SUPPLY The AC mains inlet at the back of the ventilator is equipped with a power switch and a fuse holder block. The fuse holder contains two fuses type 2A slow. The AC mains voltage must be in the range from 100V AC to 240V AC. The AC mains frequency must be in the range from 50 Hz to 60 Hz. These are the absolute maximum ratings for the AC mains supply. 1.2.1 Replacing the AC mains fuses Replace the AC mains fuses by mean of the following instructions:

- Turn off the Neptune and disconnect the power cord from the mains inlet.

- Insert a screwdriver in the small AC receptacle and pull out the fuse

holder block.

- Replace the blown fuses and place the fuse holder block back into the AC receptacle.

- Connect the power cord back to the AC mains inlet.

Note: Always replace the blown fuses with the same type and ratings. 1.2.2 Block diagram The power supply block diagram is represented on the next page.


Block diagram power supply


The battery-charging unit charges the battery to maintain a maximum battery capacity and life. If the AC mains supply voltage is present, the battery is charged with a maximum current of approximately 0,9 Ampere. After a while, the charging current decreases and a minimum trickle current of 0.09 Ampere flows through the battery. To guarantee full recharge of an exhausted battery, connect the ventilator to the mains supply for at least a couple of hours. Note: The switch at the back of the ventilator must be turned ON to activate the battery charging. Note: The ventilator uses high voltages, capable of causing personal injury. Do not touch the AC mains voltage electronics during operation. If an AC mains power failure occurs, the power supply automatically switches over to battery supply. You can work approximately 1 hour on battery supply. The battery-charging unit monitors the battery voltage and checks for a battery voltage lower than 10,5 Volt. If the battery voltage is getting lower than 10,5 Volt, the power supply electronics is disconnected from the battery to prevent a totally exhausted battery. A totally exhausted battery will shrink the battery lifetime enormously. An audible alarm is activated during 20 seconds after the ventilator shuts off because of an empty battery. The power supply board is equipped with 5 fuses:

- battery fuse F1: 3,15A slow - +5V DC fuse F2: 3,15A slow - +12V DC fuse F3: 3,15A slow - +24V DC fuse F4: 3,15A slow - +12V DC fuse F5: 3,15A slow

The green LEDs indicate if a voltage is present:

- LED D19 indicates the +24V DC input voltage from AC/DC converter - LED D14 indicates the +5V DC output voltage - LED D15 indicates the +12V DC output voltage - LED D16 indicates the +12V DC output voltage - LED D17 indicates the +24V DC output voltage

The +24 Volt DC output voltage is not available when working on battery. This means that LED D19 and D17 aren’t lit in this situation. You can rapidly determine a blown fuse by taking a look at the LED indicators. There is no LED indicator provided on the battery input voltage to prevent a waste of battery power.


The power supply board is provided with four connectors:

• Connector P3:

Pin number Description 1 +24V DC input voltage 2 +24V DC input voltage 3 GND 4 GND 5 Battery + input voltage 6 Battery – input voltage

• Connector P1:

Pin number Description 1 +5V DC output voltage 2 GND 3 +12V DC output voltage 4 GND 5 +24V DC output voltage 6 GND

• Connector P2:

Pin number Description 1 +12V DC output voltage 2 +12V DC output voltage 3 GND 4 GND

• Connector P4:

Pin number Description 1 AC mains LED indicator voltage 2 Ventilator ON/OFF switch input 3 Ventilator ON/OFF switch input

1.2.3 Schematic diagram The schematic diagram of the power supply is represented on the following pages.


1 2 3 4

A

B

C

D

43 21

D

C

B

A Title

Number RevisioSizeA4

Date: 6-Jan-2003 Sheet of File: C:\DOCUMENT\..\psu042000v1 Drawn

IN+ 3

IN+ 14 IN-2

IN-15

IN+ OP15

IN+ OP212 IN- OP16

IN- OP211

OUT 1

OUT 16

OUT 7

OUT 10

FB8 CATHOD 9

V+4

V-13

U1 LM61

GND

R193K1

R213k

R31k2

D1 MBR36

D2 MBR36

D3 MBR36

Q1BS17

GND

R4 100K

R5 1M

C1 1µF/25

C2 1µF/25

GND

D11 1n414

GND

R618k

R7R243

2

13Q5

BS25

C310µF/25

GND

c/s- 2 c/l- 4 c/s+ 3 v.in 5 c/s 1 o.c.t. 8 gnd 6 p.i. 7 o.ch.ind 9 st.lev.con 10 trik.bia 11 char.en. 12 vol.sens 13 comp. 14 d.so. 15 d.si. 16 U2 UC390

Q8 BD242R8

R0.2R9107K

R10R787

R1123k

R12R470

D4

MBR36

R13 294K

C4100N

GND

GND

GND

R14 1k

D13

BZX79C20

GND GND

R16100K

R19

470K

Q2BS17

GND

Q6

BS25

R17100K

GND GND

B1

BUZZE

C62200µF/25

GND

R20R330

D121N414

+12V

+12V

+12V

+12V

+24v

+VBA

GND

2

13

Q9RFP30P0

Q7BS25

Q3BS17

1 2 3

14

7

U3A

CD409

5 6 4

14

7

U3B

CD409

8

910

14

7

U3C

CD409

12 13

11

14 7

U3D

CD409

GND

GND

GND

GND

+12V

+12V +12V

+12V

GND

+12V

GND

F1

3.15A/

GND

GND

GND

+12V

+12V

GND

+12V

+12V S 6 CLK 3 D 5 R 4

Q 1Q 2

VCC 14 GND 7U4A CD4013

S8CLK11

D9R10

Q 13

Q 12

VCC14 GND 7U4B CD4013

D5 MBR36

R2122K

C5 100N

C7100N/40

GND

GND

R18100

+12V

C910µF/25

GND

POWER SUPPLY

1 2JP - KDP

PSU042000V1

R22 680K

1 2 3

P4

GND

+24v

1 2 3 4 5 6

P3 +24v

GND

+24V

DC INPUT

+24V

+24V

GND GND BAT+ BAT-

KEYBOAR

D6 MBR36

D7 MBR36

+24V

+24V

+24V

SW5V

SW12

+12Vou

SW16

+16Vou

SW_ON_OFF

SW_ON_OFF

POWER regulators.sc

SW5V

SW12

+12Vou

SW16

+16Vou

SW_ON_OFF

SW_ON_OFF

R23

100R+24V

C8100N/40

GND

+24V

+16Vou

SW16

+12Vou

SW12

SW5V

SW_ON_OFF

SW_ON_OFF

GND

D19

GREER3610K


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 6-Jan-2003 Sheet of File: C:\DOCUMENT\..\regulators.sch Drawn By:

FB4

ON/OFF5

GN

D3

IN1 OUT 2U5 MIC4576BT

FB4

ON/OFF5

GN

D3

IN1 OUT 2U6 MIC4576BT

+ C10470µF/63V

+ C11470µF/63V

GND

GND

L1

68µH

L2

68µH

D8

MBR360

D9

MBR360

GND

GND

C131000µF/50V

C14

1000µF/50V

GND

GND

R24

13K

R251K5

R27R4530

R261K5

GND

GND

F2

3.15A/T

F3

3.15A/T

D14

GR

EEN

R151K

GND

GND

D15

GR

EEN

R282K7

GND

GND

C16

3.3N/63V

C17

3.3N/63V

POWER SUPPLY - REGULATORS

2 2JP - KDP

PSU042000V1

SW5V

SW12V

+12Vout

SW16V

+16Vout

SW_ON_OFF1

SW_ON_OFF2

POWER SUPPLY

SW5V

SW12V

+12Vout

SW16V

+16Vout

SW_ON_OFF1

SW_ON_OFF2

1

2

3

4

5

6

P1

GND

GND

GND

GND

+24V

GND

+12V

GND

+5V

+ C12470µF/63V

GND

D10MBR745

L3

68µH

R30

9090

R311500

GND

C151000µF/50V

GND

C19

10N

DC OUTPUT CONNECTOR 1

F5

3.15A/T

GND

D16

GR

EEN

R292K7

+24v

GND

D17

GR

EEN

R3210K

1

2

3

4

P2

GND

DC OUTPUT CONNECTOR 2

+16V

GND

GND

+16V

F4

3.15A/T

+16Vout

SW16V

+12Vout

SW12V

SW5V

SW_ON_OFF1D1820V

GND

Vin5 Vsw 4

GN

D3

Vc

2

FB1

U7 LT1074CT

GNDGND

R33

2K7

GND

Q4

BS170

GND

2

13

Q10RFP30P05

R34100K

R35100K

SW_ON_OFF2


1.2.4 Power supply board layout

Note: Fan drive output voltage indicated by D16 = 12 Volt


1.3 BACKPLANE BOARD 1.3.1 Block diagram The block diagram of the backplane board is represented on the next page. The DC voltages coming from the power supply are distributed on the backplane board. Connector P1 is the connection to the power board. Connector P2 and P3 are supplying the extendable system set of electrical power. Connector P5 is the power on/off connection to the power supply (P4). Connector P4 connects to the MMI board through a flatcable. Connector P6 is used to connect the buzzer and the O2 sensor.


Block diagram backplane board


1.3.2 Schematic diagram The schematic diagram of the backplane board is represented on the next page.


1.3.3 Backplane board layout


1.4 MMI BOARD 1.4.1 Block diagram The block diagram of the MMI board is represented on the following page. There is only one microprocessor provided on the MMI board. This main microprocessor controls the control knob, the keyboard, the speaker sound, LCD and the communication. It is reprogrammable by means of the programming interface connector P1. All the graphical data is stored in the flash memory. This flash memory is also reprogrammable with the use of connector P1. The RAM memory is used as video memory. The video memory is copied through the LCD data bus to the on-board LCD controller. The LED indicators are located on the top of the MMI board and consist of four LEDs: one green LED and three red LEDs. They give you helpful information when an error occurs. More about errors and malfunctions of the ventilator is described later in this manual. The main microprocessor is communicating with the master board by means of connector P2. The MMI board sends to and receives information from the master board. The master board can transmit to and receive data from the pneumatic board. In this way the MMI board is communication with the pneumatic board.


Block diagram MMI board


1.4.2 Schematic diagram The schematic diagram of the MMI board is represented on the following pages.


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 24-Mar-2004 Sheet of File: C:\G\..\MMI.sch Drawn By:

Checked

OC1

C11

1D2

2D3

3D4

4D5

5D6

6D7

7D8

8D9

1Q 19

2Q 18

3Q 17

4Q 16

5Q 15

6Q 14

7Q 13

8Q 12

U1

74VHC573

AD0AD1AD2AD3AD4AD5AD6AD7


ALEALE

GND

A0A1A2A3A4A5A6A7

MEMORY

MEMORY

MMI_MEMORY.sch

MEMORY

A8A9A10A11A12A13A14A15

7SEG - LED

7 SEG-LED BAR

MMI_LED.sch

7SEG - LED

RDWR

SPI

RS485 DRIVER

MMI_SPI.sch

SPI

LP

ADC_CSADC_SCK7SEG_CSLEDBAR_CSDATACLOCKXSCLCONTRAST_CS

PE0PE1

KEY_Y3

KEY_Y1KEY_Y2

PB4MISOMOSI

SS

BUZ_CSBUZ_ON_OFF

PB1

GND GND

VCC

PB7

MMI board

HDH

GNDPF7PF6PF5

VCC

PF4PB7

VCC

PB4PB5PB6

PB6PB5

C112P. C212P.

GND

R1100K

R2100K

R3100K

R4100K

12345

109876

SW1

DS-05 APEM

R51K5

R61K5

R71K5

R81K5

GND

VCC

C3

100N

C4

100N

C5

100N

GND

VCC

PF4PF5PF6PF7

X116MHz

1 5

MMI 092003v1 v1.0

ENC_BENC_A

ADC_DATA

VCC 1

Vref 2

Vin 3

GND 4/CS5

SDO6

SCK7

Fo8U2

LTC2400CS8

VCC1

Vout 2

GND3

U3

MAX6120EUR

R12

4K7

+ C22

2,2µ

/ 10

V T

ant.

C6100N C23

1N

AGND AGND AGNDAGND

AGND

VCC VCC

VCC

1,2V

ADC_DATA

ADC_SCK

ADC_CS

+

-

DIN2 SCLK1

CS3

VCC14

GND5

H 11

W 12

L 13

OUT 7

SHD

N4

IN-

8

IN+

9

VSS

6

VD

D10

U4

MA

X54

37EU

D

R13

18K

+12V

+12VGND

GND

VCC

CLOCKDATABUZ_CS

BUZZER

BUZ_ON_OFF

KB_INT

LCD

LCD

MMI_LCD.sch

LCD

PA0(AD0) 51PA1(AD1) 50PA2(AD2) 49PA3(AD3) 48PA4(AD4) 47PA5(AD5) 46PA6(AD6) 45PA7(AD7) 44

PC0(A8) 35PC1(A9) 36PC2(A10) 37PC3(A11) 38PC4(A12) 39PC5(A13) 40PC6(A14) 41PC7(A15) 42

PD0(INT0)25 PD1(INT1)26 PD2(INT2)27 PD3(INT3)28 PD4(IC1)29 PD530 PD6(T1)31 PD7(T2)32

PB0(ss) 10PB1(SCK) 11PB2(MOSI) 12PB3(MISO) 13PB4(OC0/PWM0) 14PB5(OC1A/PWM1A) 15PB6(OC1B/PWM1B) 16PB7(OC2/PWM2) 17

PE0(PDI/RXD)2 PE1(PDO/TXD)3 PE2(AC+)4 PE3(AC-)5 PE4(INTR4)6 PE5(INTR5)7 PE6(INTR6)8 PE7(INTR7)9

PF0(ADC0)61 PF1(ADC1)60 PF2(ADC2)59 PF3(ADC3)58 PF4(ADC4)57 PF5(ADC5)56 PF6(ADC6)55 PF7(ADC7)54

RD 34

WR 33

XTAL1 24XTAL2 23

ALE 43

TOSC119 TOSC218

RESET20

AREF62

AGND63

AVCC64

PEN 1

VCC52

GND 22GND53

VCC 21

ATmega103L

U6

ATMEGA128-16AI

D1 D2 D3 D4

OC1

CLK11

1D2

2D3

3D4

4D5

5D6

6D7

7D8

8D9

1Q 19

2Q 18

3Q 17

4Q 16

5Q 15

6Q 14

7Q 13

8Q 12

U7

74VHC574

GND


1 2

U8A

74VHC14

1

23U9A

74VHC32

4

56U9B

74VHC32

3 4

U8B

74VHC14

89

10U9C

74VHC32

1112

13U9D

74VHC32

1

23U10A

74VHC32

5 6

U8C

74VHC14

A15

A14CS_LCD

A15

A14

WR

F_A15F_A16F_A17F_A18R_A15R_A16

4

56U10B

74VHC32

89

10U10C

74VHC32

1112

13U10D

74VHC32

RST

KEY_Y1

KEY_Y2

KEY_Y3 ENC_SWKB_INT

CS_F

CS_R

GND

1

2

Pspare

HEADER 2X1

O2


1 2 3 4 5 6

A

B

C

D

654321

D

C

B

A

Title

Number RevisionSize

B

Date: 24-Mar-2004 Sheet of File: C:\G\..\MMI_MEMORY.sch Drawn By:

Checked

MEMORY

MMI MEMORYC7100N

C8100N

VCC

HDH2 5

MMI 092003v1 v1.0

A012

A111

A210

A39

A48

A57

A66

A75

A827

A926

A1023

A1125

A124

A1328

A1429

A153

A162

A1730

A181

WR31

OE24

CE22

I/O0 13

I/O1 14

I/O2 15

I/O3 17

I/O4 18

I/O5 19

I/O6 20

I/O7 21

U11

AM29F040B_90EC

4 Mbit FLASH MEMORY 1 Mbit SRAM

A0A1A2A3A4A5A6A7A8A9A10A11A12A13A14F_A15F_A16F_A17F_A18

WRRD


A0A1A2A3A4A5A6A7A8A9A10A11A12A13A14R_A15R_A16

WRRD


GND

CS_FCS_R

VCC

A01

A12

A23

A34

A413

A514

A615

A716

A817

A918

A1019

A1120

A1221

A1329

A1430

A1531

A1632

WR12

OE28

CE5

I/O1 6

I/O2 7

I/O3 10

I/O4 11

I/O5 22

I/O6 23

I/O7 26

I/O8 27

U12

HY628100B LLT1-70


1 2 3 4 5 6

A

B

C

D

654321

D

C

B

A

Title

Number RevisionSize

B

Date: 24-Mar-2004 Sheet of File: C:\G\..\MMI_LED.sch Drawn By:

Checked7 SEGMENT DISPLAY - LED BAR

HDH3 5

MMI 092003v1 v1.0

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D5

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D6

C-5

62G

PA

RA

LIG

HT

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D7

C-5

62G

PA

RA

LIG

HT

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D8

C-5

62G

PA

RA

LIG

HT

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D9

C-5

62G

PA

RA

LIG

HT

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D10

C-5

62G

PA

RA

LIG

HT

a16

b15

c3

d2

e1

f18

g17

DP

4

DIG

114

DIG

213

a11

b10

c8

d6

e5

f12

g7

DP

9

D11

C-5

62G

PA

RA

LIG

HT

Aa

1

Ab

2120 111213141516171819

Ba

2

Bb

22

Ca

3

Cb

23

Da

4

Db

24

Ea5

Eb25

Fa6

Fb26

Ga

7

Gb

27

Ha

8

Hb

28

Ia9

Ib29

Ja10

Jb30

D14

MV

5916

4

Aa

1

Ab

2120 111213141516171819

Ba

2

Bb

22

Ca

3

Cb

23

Da

4

Db

24

Ea5

Eb25

Fa6

Fb26

Ga

7

Gb

27

Ha

8

Hb

28

Ia9

Ib29

Ja10

Jb30

D15

MV

5916

4

Aa

1

Ab

2120 111213141516171819

Ba

2

Bb

22

Ca

3

Cb

23

Da

4

Db

24

Ea5

Eb25

Fa6

Fb26

Ga

7

Gb

27

Ha

8

Hb

28

Ia9

Ib29

Ja10

Jb30

D16

MV

5916

4

Aa

1

Ab

2120 111213141516171819

Ba

2

Bb

22

Ca

3

Cb

23

Da

4

Db

24

Ea5

Eb25

Fa6

Fb26

Ga

7

Gb

27

Ha

8

Hb

28

Ia9

Ib29

Ja10

Jb30

D17

MV

5916

4

Aa

1

Ab

2120 111213141516171819

Ba

2

Bb

22

Ca

3

Cb

23

Da

4

Db

24

Ea5

Eb25

Fa6

Fb26

Ga

7

Gb

27

Ha

8

Hb

28

Ia9

Ib29

Ja10

Jb30

D13

MV

5916

4

Aa

1

Ab

2120 111213141516171819

Ba

2

Bb

22

Ca

3

Cb

23

Da

4

Db

24

Ea5

Eb25

Fa6

Fb26

Ga

7

Gb

27

Ha

8

Hb

28

Ia9

Ib29

Ja10

Jb30

D12

MV

5916

4

SEG

A14

SEG

B16

SEG

C20

SEG

D23

SEG

E21

SEG

F15

SEG

G17

SEG

DP

22

DIG

02

DIG

111

DIG

26

DIG

37

DIG

43

DIG

510

DIG

65

DIG

78

DIN1

CLK13

LOAD(CS)12

GN

D4

GN

D9

V+

19

Iset18

Dout 24

U13

MAX7221CWG

SEG

A14

SEG

B16

SEG

C20

SEG

D23

SEG

E21

SEG

F15

SEG

G17

SEG

DP

22

DIG

02

DIG

111

DIG

26

DIG

37

DIG

43

DIG

510

DIG

65

DIG

78

DIN1

CLK13

LOAD(CS)12

GN

D4

GN

D9

V+

19

Iset18

Dout 24

U14

MAX7221CWG

GNDGND GNDGND GNDGND GNDGND

DA

TA

CLO

CK

7SEG

_CS

R1412K

R1512K

R1612K

R1712K

VCC VCC VCC VCC

DA

TA

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

1_D

IG0

1_D

IG1

1_D

IG2

1_D

IG3

1_D

IG4

1_D

IG5

1_D

IG6

1_D

IG7

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_D

IG0

2_D

IG1

2_D

IG2

2_D

IG3

2_D

IG4

2_D

IG5

2_D

IG6

2_D

IG7

3_SE

GA

3_SE

GB

3_SE

GC

3_SE

GD

3_SE

GE

3_SE

GF

3_SE

GG

3_SE

GD

P

3_D

IG0

3_D

IG1

3_D

IG2

3_D

IG3

3_D

IG4

3_D

IG5

3_D

IG6

3_D

IG7

4_SE

GA

4_SE

GB

4_SE

GC

4_SE

GD

4_SE

GE

4_SE

GF

4_SE

GG

4_SE

GD

P

4_D

IG0

4_D

IG1

4_D

IG2

4_D

IG3

4_D

IG4

4_D

IG5

4_D

IG6

4_D

IG7

LEDB

AR

_CS

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

2_SE

GA

2_SE

GB

2_SE

GC

2_SE

GD

2_SE

GE

2_SE

GF

2_SE

GG

2_SE

GD

P

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

1_SE

GA

1_SE

GB

1_SE

GC

1_SE

GD

1_SE

GE

1_SE

GF

1_SE

GG

1_SE

GD

P

1_D

IG0

1_D

IG1

1_D

IG2

1_D

IG3

2_D

IG0

2_D

IG1

2_D

IG2

2_D

IG3

2_D

IG4

2_D

IG5

2_D

IG6

2_D

IG7

1_D

IG4

1_D

IG5

TIDAL VOLUMEMINUTE VOLUME

PEAK PLATEAU MEAN PEEP O2

3_D

IG0

3_D

IG1

3_D

IG2

3_D

IG3

3_D

IG4

3_D

IG5

3_D

IG6

3_D

IG7

4_D

IG0

4_D

IG1

4_D

IG2

4_D

IG3

4_D

IG4

4_D

IG5

4_D

IG6

3_SE

GA

3_SE

GB

3_SE

GC

3_SE

GD

3_SE

GE

3_SE

GF

3_SE

GG

3_SE

GD

P3_

SEG

A3_

SEG

B3_

SEG

C3_

SEG

D3_

SEG

E3_

SEG

F3_

SEG

G3_

SEG

DP

3_SE

GA

3_SE

GB

3_SE

GC

3_SE

GD

3_SE

GE

3_SE

GF

3_SE

GG

3_SE

GD

P3_

SEG

A3_

SEG

B3_

SEG

C3_

SEG

D3_

SEG

E3_

SEG

F3_

SEG

G3_

SEG

DP

3_SE

GA

3_SE

GB

3_SE

GC

3_SE

GD

3_SE

GE

3_SE

GF

3_SE

GG

3_SE

GD

P

3_SE

GA

3_SE

GB

3_SE

GC

3_SE

GD

3_SE

GE

3_SE

GF

3_SE

GG

3_SE

GD

P3_

SEG

A3_

SEG

B3_

SEG

C3_

SEG

D3_

SEG

E3_

SEG

F3_

SEG

G3_

SEG

DP

3_SE

GA

3_SE

GB

3_SE

GC

3_SE

GD

3_SE

GE

3_SE

GF

3_SE

GG

3_SE

GD

P4_

SEG

A4_

SEG

B4_

SEG

C4_

SEG

D4_

SEG

E4_

SEG

F4_

SEG

G4_

SEG

DP

4_SE

GA

4_SE

GB

4_SE

GC

4_SE

GD

4_SE

GE

4_SE

GF

4_SE

GG

4_SE

GD

P

4_SE

GA

4_SE

GB

4_SE

GC

4_SE

GD

4_SE

GE

4_SE

GF

4_SE

GG

4_SE

GD

P4_

SEG

A4_

SEG

B4_

SEG

C4_

SEG

D4_

SEG

E4_

SEG

F4_

SEG

G4_

SEG

DP

4_SE

GA

4_SE

GB

4_SE

GC

4_SE

GD

4_SE

GE

4_SE

GF

4_SE

GG

4_SE

GD

P4_

SEG

A4_

SEG

B4_

SEG

C4_

SEG

D4_

SEG

E4_

SEG

F4_

SEG

G4_

SEG

DP

4_SE

GA

4_SE

GB

4_SE

GC

4_SE

GD

4_SE

GE

4_SE

GF

4_SE

GG

4_SE

GD

P

7SEG - LED

C9100N

C10100N

C11100N

GND

VCC

C12100N

SEG

A14

SEG

B16

SEG

C20

SEG

D23

SEG

E21

SEG

F15

SEG

G17

SEG

DP

22

DIG

02

DIG

111

DIG

26

DIG

37

DIG

43

DIG

510

DIG

65

DIG

78

DIN1

CLK13

LOAD(CS)12

GN

D4

GN

D9

V+

19

Iset18

Dout 24

U15

MAX7221CWG

SEG

A14

SEG

B16

SEG

C20

SEG

D23

SEG

E21

SEG

F15

SEG

G17

SEG

DP

22

DIG

02

DIG

111

DIG

26

DIG

37

DIG

43

DIG

510

DIG

65

DIG

78

DIN1

CLK13

LOAD(CS)12

GN

D4

GN

D9

V+

19

Iset18

Dout 24

U16

MAX7221CWG

+ C100

10µ / 10V Tant.

+ C101

10µ / 10V Tant.

+ C102

10µ / 10V Tant.

+ C103

10µ / 10V Tant.


1 2 3 4 5 6

A

B

C

D

654321

D

C

B

A

Title

Number RevisionSize

B

Date: 24-Mar-2004 Sheet of File: C:\G\..\MMI_SPI.sch Drawn By:

Checked

DE1/RE11

DE2/RE24

DE3/RE35

DR12

DR23

DR36

RO47

DI48

DE49

RE410 GND 11OB4 12OA4 13OB3 14OA3 15

OB2 17OA2 18OB1 19OA1 20U17

DS36954

SS

SS

MISOMISOMOSI

SCK

MISOAMISOBMOSIAMOSIB

SCKASCKBSSSLV1ASSSLV1B

SPI

GND

RST

PB1

PE1

PE0

PSCK

PMISO

PMOSI

SCK

KEY_X2

KEY_X1

GND

VCC 4

MR 3RST2

GND1U18

MAX811L

GND

VCC

1 23 45 67 89 10

P1

HEADER 5X2 HAAKS

VCC

GNDPSCKPMISO

PMOSI

GND

RST

MMI SPI

C13100N

C14100N

C15100N

GND

VCC

MOSIAMISOASCKASSSLV1A

MOSIBMISOBSCKBSSSLV1B

AGND

GND

R18

5K6R19

5K6R20

5K6R21

5K6

MOSIA

MISOA

SCKA

SSSLV1A

MOSIB

MISOB

SCKB

SSSLV1B

+12V VCC

GND

C16

100N

+ C244µ7

/ 16V

Tan

t.

+ C25

4µ7

/ 16V

Tan

t.

C17

100N

GND

AX12

AY13

BX2

BY1

CX5

CY3

A11

B10

C9

INH6

O/IA 14

O/IB 15

O/IC 4

U19

74HC4053

HDH4 5

MMI 092003v1 v1.0

1 23 45 67 89 1011 1213 1415 1617 1819 20

P2

HEADER 10X2

BUZZER +24V

O2

GND

PS_ON_OFF

VCC+12V123456789

10111213141516171819

P3

R22

1K8

GND

R243K3

D18

ZEN

ER 2

0V 0

,4W

+24V

PS_ON_OFF

1_SEGA1_SEGB1_SEGC1_SEGD1_SEGE1_SEGF1_SEGG1_SEGDP1_DIG61_DIG7

R9

1K5

R101K5

GNDGND

KEY_X1KEY_X2KEY_Y1KEY_Y2KEY_Y3

GND

CO

NN

ECT

TO K

EYB

OA

RD

R253K3

R263K3

VCC VCC

ENC

_SW

ENC

_A

ENC

_B

Q1

MM

BF1

70

R231K8

9 8

U8D

74AHC14

1110

U8E

74VHC14

13 12

U8F

74VHC14

R11

1K5

GND

R273K3

VCC

GNDGND

CY1CY2CY3

GND GNDGND

VCC

1 23 45 67 89 10

P4

HEADER 5X2


1 2 3 4 5 6

A

B

C

D

654321

D

C

B

A

Title

Number RevisionSize

B

Date: 24-Mar-2004 Sheet of File: C:\G\..\MMI_LCD.sch Drawn By:

CheckedLCD INTERFACE

HDH5 5

MMI 092003v1 v1.0

D059

D160

D21

D32

D43

D54

D6

5

D7

6

OSC

154

OSC

255

VA

043

VA

142

VA

241

VA

340

VA

439

VA

538

VA

637

VA

736

VA

835

VA

934

VA

1033

VA

1132

VA

1231

VA

1330

VA

1428

VA

1527

VD0 26

VD1 25

VD2 24

VD3 23

VD4 22

VD5 21

VD6 20

VD7 19

YSCL 18

YD 17

YDIS 16

WF 15

LP 14

XSCL 12

XECL 11

VRW44

VCE45

RES47

RD50

WR51

SEL252

SEL153

CS56

A057

XD

010

XD

19

XD

28

XD

37

NC

29

NC

46

NC

48

NC

49

U20

S1D13305F00A1

A010

A19

A28

A37

A46

A55

A64

A73

A825

A924

A1021

A1123

A122

A1326

WR27

CE20 OE22

A141

D0 11

D1 12

D2 13

D3 15

D4 16

D5 17

D6 18

D7 19

256

U21

BS62LV256SC-70

VA0VA1VA2VA3VA4VA5VA6VA7VA8VA9VA10VA11VA12VA13VA14

VD0VD1VD2VD3VD4VD5VD6VD7

VA

0V

A1

VA

2V

A3

VA

4V

A5

VA

6V

A7

VA

8V

A9

VA

10V

A11

VA

12V

A13

VA

14

VD0VD1VD2VD3VD4VD5VD6VD7

AD0AD1AD2AD3AD4AD5

AD

6A

D7

A0

GND

GND

RST

WRRD

CS_LCD

X2

10 M

Hz

C26

10P.

C27

10P.

GND GND

XD

0X

D1

XD

2X

D3

YD

LPXSCL

C18

100N

C19

100N

GND GND

VCC VCC

VA15

VA

15

C20

100N

GND

VCC

VWR

VW

R

123456789

1011121314

P5XD0XD1XD2XD3

VCC

GND

YD

LPXSCL

CO

NN

ECT

TO L

CD

DIS

PLA

Y

POL2

ISET5

SHDN1

VC

C8

LX 7

FB 4

REF 3

GN

D6

U22

MAX629ESA

VCC

C21

100N+C28

10µ

/ 35V

Tan

t. Lo

w E

SR

GND GND

L147µH

C30

2.2µF / 40VD19

MB

R05

40T1

D20

MBR0540T1

+

C2910µ / 35V Tant. Low ESRR28

120K

R306k8

C31

100p

F / 4

0 V

C322.2µF / 10V

GND GND

GNDGND

-22V

+

-

DIN2 SCLK1

CS3

VCC14

GND5

H 11

W 12

L 13

OUT 7

SHD

N4

IN-

8

IN+

9

VSS

6

VD

D10

U5

MA

X54

37EU

D

VCC

GND

R31

270K

VCC

R29

68K

D0D1

D3D2

/DOFFFLMN.C.CL1CL2VDD

VSSVo

VSSVEEVo

1

2

P6

CONNECT TO LED BACKLIGHTVout 1

GND 2

GND 3

NC 4NC5

GND6

GND7

Vin8U23

LM78L05ACM

+12V

R32

82E

GND

R33

2E

DATACONTRAST_CS

CLOCK

1 2STR1

VCC

12

STR2


1.4.3 MMI board layout


1.4.4 Built-in test software

• Start-up test After turning the ventilator on, the MMI board will test the different functions.

During start-up the following tests are executed:

o Microprocessor internal functions tests: test internal program memory test internal SRAM memory test the timers test internal EEPROM memory test Watchdog

o Microprocessor external functions tests:

test external SRAM memory test external flash memory test LCD driver with Medec logo test keyboard for shorts buzzer test


Visual test of the leds and the displays on the keyboard panel. All segments and leds are on.

Visual test of the barograph

The green leds light up from left to right and the red leds from right to left.

o Microprocessor communication test: Tests the communication between MMI board and master

board.

When all these tests are executed successfully, the MMI board is ready to start working. If an error occurred, the type of error is displayed on the LED indicators.

G R R R


After start-up, the LED indicators can show the following errors:

LED indicators Type error

G R R R

Device is working properly

G R R R

Microprocessor internal function error

G R R R

Microprocessor external function error

G R R R

Communication error

Note: During error free operation of the ventilator, the LED indicators might be turned on and off by the software. This is quite normal and has nothing to do with error codes. To determine the exact error on the MMI board, you have to perform a specific test by using the build-in test software. Note: When executing a specific test on the MMI board, there will be no communication between the master board and the MMI board. The master board will interprete this as a communication error and a continuous beep is audible. This can be very annoying. To prevent this error, put the master board in internal test mode by setting dipswitch 1 high. For detailed instructions, see the master board section later in this manual.


• Microprocessor internal function test If a microprocessor internal error is detected, execute an internal function test as follows:

o Turn the Neptune ventilator off o Remove the upper cover plate at the back of the Neptune o Change the dipswitch setting of the MMI board with a small

screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo

o Display changes from normal to inverted to flashing o If no errors where found, all the red LEDs are off and the green LED is

blinking o If an error is detected, the error is indicated on the red error LEDs and

the green LED is off. The possible errors are illustrated in the table on the next page:


INTERNAL FUNCTION TEST ERROR CODES Error LEDs Error code Description

G R R R

0

NO ERRORS detected, test loop is running

G R R R

1

Internal PROGRAM MEMORY error

G R R R

2

Internal SRAM error

G R R R

3

Internal TIMER error

G R R R

4

Internal EEPROM error

G R R R

5

Internal WATCHDOG error

G R R R

6

Reserved

G R R R

7

Reserved


Resolve internal function test error code 4 - Internal EEPROM error To fix error code 4 or internal EEPROM error, follow the next steps:

o Turn the Neptune ventilator off o Change the dipswitch setting of the MMI board with a small

screwdriver to

1 2 3 4 5 o Turn the ventilator on o You will notice that all the LED indicators are blinking fast. This

means that the MMI board EEPROM settings are restored to the factory settings. You need to check the values in the setup menu afterwards

o Turn the ventilator off o Repeat the microprocessor internal functions test described on the

previous page. If the EEPROM error still remains, contact an authorized service engineer

Note: Restoring the MMI EEPROM settings will not affect the pneumatic board EEPROM settings. Calibration of the ventilator is not needed in this case. Just check the power-on parameters and the speaker sound volume in the setup menu.

Warning: Try to resolve internal function error code 4 (EEPROM error) with the instructions described above. For all other internal function test errors, contact an authorized service engineer.


• Microprocessor external function test If a microprocessor external error is detected, execute an external function test as follows:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o The Medec logo changes from time to time from normal to inverted to

flashing

o If no errors where found, all the red LEDs are off and the green LED is blinking. Some devices need to be visually checked for failures.

o Visual test for the barograph: check that all red leds light up from right to left and the green leds from left to right.


o 7 segment displays: all segments light up once. When a digit is done, the Dp segment is lit.

After this test, a counter from 0 to F is displayed on all digits.


o Leds on the keyboard panel: the test starts with all leds off. Each led is lit up once. Battery => Tidal volume => Minute volume => O2 High => O2 Low => CMV => PCV => Manual => Standby => High pressure Alarm => Low pressure alarm => Apnea alarm => Trigger => LCD led.

After this test, the leds light up in the following sequence: 1° Standby (1) 2° Standby (1), High pressure (2) 3° Standby (1), High pressure (2), Low pressure (3) 4° Standby (1), High pressure (2), Low pressure (3), Apnea alarm (4) 5° Standby (1), High pressure (2), Low pressure (3), Apnea alarm (4), Trigger (5) 6° Standby (1), High pressure (2), Low pressure (3), Apnea alarm (4), Trigger (5) and LCD led (6)

o LCD contrast

In the FiO2 display appears a counter from 1 to 5. The contrast of the LCD changes with each value.

1

234 5

6


o Alarm buzzer volume In the FiO2 display appears a counter from 1 to 5. The audio volume of the buzzer changes with each value.

o O2 sensor

In the FiO2 display appears O2.

When no sensor attached, the value should be around 7FFFF When shorted, the value should be around 000000 A good sensor, should have a value around 3F8000


o If an error is detected, the error is indicated on the red error LEDs and the green LED is off. The possible errors are illustrated in the table below.

EXTERNAL FUNCTION TEST ERROR CODES Error LEDs Error code Description

G R R R

0

NO ERRORS detected, test running

G R R R

1

External FLASH/ROM error

G R R R

2

External SRAM error

G R R R

3

LCD DISPLAY DRIVER error

G R R R

4

Reserved

G R R R

5

Reserved

G R R R

6

Reserved

G R R R

7

Reserved

Note: The external function test is running continuously. When an error is detected, the error is indicated on the LED indicators, and the external function test is repeated. It’s not necessary to turn the ventilator on and off to repeat the external function test.


Resolve external function test error code 1 - External flash error There is a problem with the external flash memory. The microprocessor is only reading data from the flash memory for display on the graphics display. Contact an authorized service engineer if the problem cannot be resolved.

Resolve external function test error code 2 - External SRAM error There is a problem with the external SRAM memory. The microprocessor is reading data from and writing data to the external SRAM memory. Contact an authorized service engineer if the problem cannot be resolved.

Resolve external function test error code 3 - External display driver error There is a problem with the external display driver. It’s not necessary to connect the graphics display with the MMI board to perform an external display driver test. The microprocessor is writing data to and reading data from the display driver. Contact an authorized service engineer if the problem cannot be resolved.

Resolve external function test error code 4 - Keyboard error There is a problem with the keyboard. To define which error is detected on the keyboard controller, you can perform a specific keyboard controller test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display shows the Medec logo and all leds are off


o Press the volume mode key (1).

The leds tidal volume (2) and minute volume (3) should come on. Release the key. The leds should be off.

o Press the CMV key (5).

The led CMV (4) should be on. Release the key. The leds should be off.

o Press the PCV key (7).

The led PCV (6) should be on. Release the key. The leds should be off.

o Press the Manual key (9).

The led Manual (8) should be on. Release the key. The leds should be off.

o Press the Standby key (11).

The led Standby (10) should be on. Release the key. The leds should be off.

o Press the Silent key (13).

The led LCD (12) should be on. Release the key. The leds should be off.

o Press the rotary knob (14).

The led battery (15) should be on. Release the key. The leds should be off.

12

3

4

10

11

12

13

5 6 7 8 9

14

15


• Microprocessor communication test To perform a microprocessor communication test, perform the following test:


screwdriver to

o Change the dipswitch setting of the master board with a small

screwdriver to

o Turn the ventilator on. o If no errors found, the green LED is blinking. If an error is detected,

the error is indicated on the red error LED’s and the green LED is off. The red LED’s indicating the numbers of error’s detected (binary number between 1 and 7).

• LED indicator test To test the error LED indicators, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o The error LEDs are blinking one by one


• Showing a test pattern on the graphics display To test the display driver and/or graphics display, you can show a test pattern on the graphics display. Perform the following instructions:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display shows a test pattern


• Alarm buzzer test To test the buzzer, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o In the FiO2 display (1) appears a counter from 1 to 5

The audio volume of the buzzer changes with each value


• LCD contrast test To test the buzzer, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o In the FiO2 display (1) appears a counter from 1 to 5

The LCD contrast changes with each value


• Barograph test To test the barograph, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o First test: the green leds light up from left to right in the airway

pressure window.

o Second test: the red leds light up from left to right in the airway

pressure window.

o Third test: both green and red leds light up from left to right in the

airway pressure window.


• Keyboard test To test the barograph, perform the following test:


screwdriver to


o Press the volume mode key (1).

The leds tidal volume (2) and minute volume (3) should come on. Release the key. The leds should be off.

o Press the CMV key (5).

The led CMV (4) should be on. Release the key. The leds should be off.

o Press the PCV key (7).

The led PCV (6) should be on. Release the key. The leds should be off.

12

3

4

10

11

12

13

5 6 7 8 9

14

15


o Press the Manual key (9). The led Manual (8) should be on. Release the key. The leds should be off.

o Press the Standby key (11).

The led Standby (10) should be on. Release the key. The leds should be off.

o Press the Silent key (13).

The led LCD (12) should be on. Release the key. The leds should be off.

o Press the rotary knob (14).

The led battery (15) should be on. Release the key. The leds should be off.


• Keyboard leds test To test the keyboard leds, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o First test: the leds light up one by one


o Second test: the leds light up in the following way: 1° Standby (1) 2° Standby (1), High pressure (2) 3° Standby (1), High pressure (2), Low pressure (3) 4° Standby (1), High pressure (2), Low pressure (3), Apnea alarm (4) 5° Standby (1), High pressure (2), Low pressure (3), Apnea alarm (4), Trigger (5) 6° Standby (1), High pressure (2), Low pressure (3), Apnea alarm (4), Trigger (5) and LCD led (6)

1

234 5

6


• 7 segment display test To test the 7 segment displays, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o First test: each segment lights up once. When a digit is done, the

decimal point segment is on.


o Second test: on each display a counter from 0 to F is displayed


• O2 sensor test

To test the 7 segment displays, perform the following test:


screwdriver to


In the FiO2 display appears O2.

When no sensor attached, the value should be around 7FFFF When shorted, the value should be around 000000 A good sensor, should have a value around 3F8000


• Encoder test To test the encoder, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o The displays are blank

Turn the knob to the right. In the peep display appears a number. This number increments with each click of the encoder. Turn the knob to the right. This number decrements with each click of the encoder

Note: Make sure that in normal operating mode of the Neptune ventilator the dipswitches of the MMI board, master board and pneumatic board are put in the following position:

1 2 3 4 5


1.4.5 Graphics display The LCD display is quarter-VGA display. It has a contrast adjustment. The graphics display excels in a wide range of ambient lighting environments while effectively eliminating the blooming. The display consists of a cristal panel and control electronics. Note: The display generates voltages capable of causing personal injury (high voltage up to -24 VDC). Do not touch the display electronics during operation. The display is connected to connector P5 and P6 of the MMI board. After switching the ventilator on, the display will respond after a few seconds.


1.5 O2 MEASUREMENT 1.5.1 General The O2 measurement is integrated into the MMI board. 1.5.2 Operation The oxygen measurement is done with an O2 fuel cell. The oxygen sensor function is similar to a typical battery. The O2 fuel cell generates a small voltage that is linear with the oxygen concentration. The output voltage of a new O2 fuel cell is about 15,0 ± 2 mV at dry ambient air. The voltage is converted to a digital value through the 24-bit ADC converter. U2 generates a reference voltage equal to 1,2V used by the ADC converter U1. LED D1 is lit when the ADC converter is working properly.

• O2 sensor test To test the O2 sensor, perform the following test:


screwdriver to

1 2 3 4 5 o Turn the ventilator on o The graphics display continuously shows the Medec logo o The display fields plateau, mean and peep are showing a value

When no sensor attached, the value should be around 7FFFF When shorted, the value should be around 000000 A good sensor should have a value around 3F8000


1.5.3 O2 Measurement specifications

• Ambient air calibration

Minimum sensor input voltage: ± 4,3 mV

Maximum sensor input voltage: ± 230 mV

• 100% O2 calibration

Minimum sensor input voltage: Ambient air cal. voltage x 4

Maximum sensor input voltage: 1200 mV

• Recommended calibration

Calibrate every 24 hours with ambient air and/or 100% O2.


1.6 MASTER BOARD 1.6.1 Block diagram The block diagram of the master board is represented on the following page. The master board looks after the communication between the MMI board and the pneumatic board. The master board contains a reprogrammable microprocessor (reprogrammable by means of connector P3). The real time clock keeps up the actual time and date. It contains also timer information like the total working time of the ventilator, service time, etc. The audible safety circuit contains a buzzer. The buzzer is driven by the microprocessor and the reset signal. If an error is detected, the buzzer generates an audible sound. The master board is also provided with a RS-232 interface.


microprocessor

Rammemory

Programminginterface

(connector P3)

SPI communication with other boards(connector P2)

LED indicators

Master board

Real time clock

RS-232interface

RS-232 interface(connector P4)

audible safety circuit

Block diagram master board


1.6.2 Schematic diagram The schematic diagram of the master board is represented on the following pages.


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 15-Jan-2003 Sheet of File: C:\DOCUMENT\..\master.sch Drawn By:







RD 34

WR 33

XTAL1 24XTAL2 23

ALE 43

TOSC119 TOSC218

RESET20

AREF62

AGND63

AVCC64

PEN 1

VCC52

GND 22GND53

VCC 21ATmega103L

U1

103L

OC1

C11

1D2

2D3

3D4

4D5

5D6

6D7

7D8

8D9

1Q 19

2Q 18

3Q 17

4Q 16

5Q 15

6Q 14

7Q 13

8Q 12

U2

74HC573



ALE

ALE

GND

A0A1A2A3A4A5A6A7

A8A9A10A11A12A13A14A15

SPI BUS

SPIBUS.sch

RDWR

A1

B2

C3

E14

E25

E36

Y0 15

Y1 14

Y2 13

Y3 12

Y4 11

Y5 10

Y6 9

Y7 7

U3

74HC138

A15

CS0CS1CS2CS3CS4CS5CS6CS7

A1

B2

C3

E14

E25

E36

Y0 15

Y1 14

Y2 13

Y3 12

Y4 11

Y5 10

Y6 9

Y7 7

U4

74HC138

SS0SS1SS2SS3SS4SS5SS6SS7

SS

SS

MOSIMISO

PB1

PE0PE1PE2PE3PE4PE5PE6PE7

GND

GND

PF0PF1PF2PF3PF4PF5PF6PF7

A010

A19

A28

A37

A46

A55

A64

A73

A825

A924

A1021

A1123

A122

A1326

WR27

CE20 OE22

A141

D0 11

D1 12

D2 13

D3 15

D4 16

D5 17

D6 18

D7 19

256

U6

RAM/ROM/FLASH


A0A1A2A3A4A5A6A7A8A9A10A11A12A13

A010

A19

A28

A37

A46

A55

A64

A73

A825

A924

A1021

A1123

A122

A1326

WR27

CE20 OE22

A141

D0 11

D1 12

D2 13

D3 15

D4 16

D5 17

D6 18

D7 19

256

U7

RAM/ROM/FLASH



01 S1

01 S2

01 S3

01 S4

A14

WR A14

WR

CS0RD RD

CS1

01 S5

01 S6

X1 4MHZ

GND GND

VCC

PWR1

X12

X23

AD04

AD15

AD26

AD37

AD48

AD59

AD610

AD711

GND12 CS 13ALE 14WR 15GND 16RD 17KS 18IRQ 19Vbat 20RCLR 21Vbaux 22SQW 23VCC 24U8

DS1685


GND

BAT1

LITHIUM 3V

D1

HLM

P-17

90

R11K5

PB7

VCC

MASTER

JP-KDP

R5

100K

R6

100K

R7

100K

R8

100K

VCC

PF7PF6PF5

R9100K

R143K9

GND

R10100K

R1510K

GND

+12V

+

C3

10µF

GND

+24V

+

C410µFGND

PF0

PF1

GND

+C510µF

C6100nF

GND

VCC

GND

PB7VCC

D2

HLM

P-17

00

R21K5

VCC

D3

HLM

P-17

00

R31K5

VCC

D4

HLM

P-17

00

R41K5

VCC

PB4PB5PB6

PB4PB5PB6

PF4 12345

109876

SW1

DS-05 APEM

A1

B2

C3

E14

E25

E36

Y0 15

Y1 14

Y2 13

Y3 12

Y4 11

Y5 10

Y6 9

Y7 7

U5

74HC138

A15A14

A12

A8A9A10


CS8

RD

WRALE

GND

R11

100K

VCC

VCC

R12

100K

VCC

PD0PD1PD2PD3PD4PD5PD6PD7

RST

PD0PD1PD2

PD3PD4PD5

PE4

X2

32.768KHz

GND

C133pF

C233pF

MASTER012000v1

1 2

v1.0

VCC1

Vout 2

GND3

U14

MAX6045AEUR-T

VCC

C2010nF


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 9-Jan-2003 Sheet of File: C:\DOCUMENT\..\SPIBUS.sch Drawn By:

DE1/RE11

DE2/RE24

DE3/RE35

DR12

DR23

DR36

RO47

DI48

DE49

RE410 GND 11OB4 12OA4 13OB3 14OA3 15

OB2 17OA2 18OB1 19OA1 20U9

SP495

SS0

MISOMOSI

SCK



AX12

AY13

BX2

BY1

CX5

CY3

A11

B10

C9

INH6

O/IA 14

O/IB 15

O/IC 4

U11

74HC4053

RST

PB1

PE1

PE0

PSCK

PMISO

PMOSI

SCK

TPE1

RPE0

GND

VCC 4

MR 3RST2

GND1U12

max811L

GND

VCC

1 23 45 67 89 10

P3

HEADER 5X2

VCC

GNDPSCKPMISO

PMOSI

C7

100nF

DE1/RE11

DE2/RE24

DE3/RE35

DR12

DR23

DR36

RO47

DI48

DE49

RE410 GND 11OB4 12OA4 13OB3 14OA3 15

OB2 17OA2 18OB1 19OA1 20U10

SP495

SSSLV1ASSSLV1B

SSSLV2B

SSSLV3B

SSSLV4BSSSLV4A

SSSLV3A

SSSLV2ASS1SS2

SS3

SS4

VCC

GND

GND

GND

SPIBUS

JP-KDP

R13100KVCC

+ C8

0.1µF 16V

+C9

0.1µF 16V

R1 IN13

R2 IN8

T1 IN11

T2 IN10

V+2 V- 6

R1 OUT 12

R2 OUT 9

T1 OUT 14

T2 OUT 7

C1+1

C1 -3 C2+ 4

C2 - 5

U13

MAX202ECWE

+C10

0.1µF 16VVCC

+

C11

0.1µF 16V

GND

TPE1

RPE0

GND GND

MOSIAMISOASCKA

SSSLV0A

SSSLV2ASSSLV3ASSSLV4A

MOSIBMISOBSCKBSSSLV0BSSSLV1B

SSSLV3BSSSLV2B

SSSLV4B

GND GND

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 36

P2

HEADER 18X2

R17

5k6R18

5k6R19

5K6

R20

5k6

MOSIA

MISOA

SCKA

MOSIB

MISOB

SCKB

R21

5k6R22

5k6R23

5k6

SSSLV1A

SSSLV2A

SSSLV3A

SSSLV4A

SSSLV2B

SSSLV3B

SSSLV4B

SSSLV1B

C12100N

C13100N

C14100N

C15100N

VCC

1 23 45 67 89 10

P4

HEADER 5X2

GND

VCC

GND

GND

RST

PE2

PE3

C16100N

C17100N

VCC

GND

+12V

GND

GND

VCC

+24V

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 36

P1

HEADER 18X2

GND

C18100N

+ C2122µF

+ C2222µF C19

100N

GND GND

VCC

GND+12V

GND

C24100N

C25100N

VCC

GND

C26100N

C27100N

VCC

GND

SSSLV1A

MAS012000v1 v1.02 2

R24

5k6SSSLV0A SSSLV0B

BUZ1

GND

Q1

BS170M

Q2

BS170M

Q3

BS170M

+12V

R2510K

C28100N

GND GND

RST

R27

1K

GND GND GND

C29100N

R26100K

PD7

D6

1N4148

VCCD71N4148

Neptune ventilator - 61 - Technical manual

1.6.3 Build-in test software After turning the ventilator on, the master board will test all his different functions. During start-up the following tests are executed:

o Microprocessor internal functions tests:

test internal program memory test internal SRAM memory test the timers test EEPROM memory test Watchdog

o Microprocessor external functions test

test external SRAM memory test external RS-232 test external real time clock

o Microprocessor communication test

test the communication between master board and display board

test the communication between master board and pneumatic board

When all these tests are executed successfully, the master board is ready to start working. If an error occurred, the type of error is displayed on the LED indicators.

G R R R After start-up the LED indicators can show the following errors:


G R R R


G R R R


G R R R


G R R R

Communication error


To determine the exact error on the master board, you have to perform a specific test by using the build-in test software. Note: During executing a specific test on the master board there will be no

communication between the master board and the display board. The MMI board will interpret this as a communication error and a communication error code is displayed and also an alarm sound is audible. This can be very annoying. To prevent this error put the MMI board in internal test mode by setting dipswitch 1 high. See the MMI board section in this manual for detailed instructions.

Note: The pneumatic board will also detect a communication error during a

executing a specific test on the master board. Don’t pay any attention to it in this situation.

• Microprocessor internal function test If a microprocessor internal error is detected, execute an internal function test as follow:

o Turn the Neptune ventilator off o Remove the upper cover plate at the back of the Neptune. o Change the dipswitch setting of the master board with a small

screwdriver to

1 2 3 4 5 o Turn the ventilator on o If no errors where found, all the red LED’s are off and the green LED

is blinking. o If an error is detected, the error is indicated on the red error LED’s and



INTERNAL FUNCTION TEST ERROR CODES

Error LED’s Error code Description

G R R R

0


G R R R

1

internal PROGRAM MEMORY error

G R R R

2

Internal SRAM error

G R R R

3


G R R R

4


G R R R

5


G R R R

6

Reserved

G R R R

7

Reserved


Resolve internal function test error code 4 – Internal EEPROM error

To fix error code 4 or internal EEPROM error follow the next steps:

o Turn the Neptune ventilator off. o Change the dipswitch setting of the master board with a small

screwdriver to


means that the master board EEPROM settings are restored to the factory settings.

o Turn the ventilator off o Repeat the microprocessor internal functions test described on the

previous page. If the EEPROM error still remains contact an authorized service engineer.

Note: Restoring the master EEPROM settings will not affect the pneumatic

board EEPROM settings. Calibration of the ventilator is not needed in this case.

Warning: Try to resolve internal function error code 4 (EEPROM error) with the instructions described above. For all other internal function test errors contact an authorized service engineer.


• Microprocessor external function test If a microprocessor external error is detected, execute an external function test as follow:


screwdriver to





EXTERNAL FUNCTION TEST ERROR CODES


G R R R

0


G R R R

1

reserved

G R R R

2

reserved

G R R R

3

reserved

G R R R

4

External REAL TIME CLOCK error

G R R R

5

reserved

G R R R

6

reserved

G R R R

7

reserved

Note: The external function test is running continuously. When an error is

detected, the error is indicated on the LED indicators, and the external function test is repeated. It’s not necessary to turn the ventilator on and off to repeat the external function test.


Resolve external function test error code 4 – External real time clock error There is a problem with the real time clock. Device U8 contains the actual time and date and timer information. The microprocessor can send data or read data from device U8. Device U8 is equipped with a very accurate crystal and a backup battery. Contact an authorized service engineer if the problem cannot be resolved. If the test is running correctly the buzzer is set on and off every second. Communication test between master board and MMI board

To test the communication between the master board and the MMI board perform the following test:

o Turn the Neptune ventilator off. o Remove the upper cover plate at the back of the Neptune. o Change the dipswitch setting of the master board with a small

screwdriver to

1 2 3 4 5 o Change the dipswitch setting of the MMI board with a small

screwdriver to

1 2 3 4 5

o Turn the ventilator on o If no errors found, the green LED is blinking. If an error is detected,



Communication test between master board and pneumatic board

To test the communication between the master board and the pneumatic board perform the following test:


screwdriver to

1 2 3 4 5 o Change the dipswitch setting of the pneumatic board with a small

screwdriver to

1 2 3 4 5

o Turn the ventilator on. o If no errors found, the green LED is blinking. If an error is detected,


• LED indicator test

To test the error LED indicators perform the following test:

o Turn the Neptune ventilator off o Remove the upper cover plate at the back of the Neptune. o Change the dipswitch setting of the MMI board with a small

screwdriver to

1 2 3 4 5 o Turn the ventilator on o The error LED’s are blinking one by one.


1.6.4 Master board layout


1.7 PNEUMATIC BOARD 1.7.1 Block diagram The block diagram of the pneumatic board is represented on the following page. The pneumatic board is provided with one microprocessor. The microprocessor is re-programmable by means of connector P3. The A/D converter converts the signal of the pressure transducer, the +12V valves voltage and the +12V voltage to a digital value. There are two valve driver IC’s that can drive each 8 valves. Each output is provided with a green LED. You can see the valve state directly on the LED’s. Connectors P4 and P5 connecting the valve driver IC’s with the valves. The pneumatic microprocessor receives settings from the MMI board. On the basis of these settings and the signals from the transducers the microprocessor is calculating all the parameters needed to drive the pneumatic valves. The microprocessor must trigger the 12V safety circuit in a certain time. During a microprocessor failure the +12V safety circuit will not be triggered and the +12V voltage on the valves shuts off. The ventilator switches automatically over to MAN. mode in this situation (because no valves are driven).


microprocessor

RAMmemory

A/D converterPTR1

Patient pressure

Programminginterface

(connector P3)

SPI communication with master board(connector P2)

LED indicators

Pneumatic board

PTR2Peep valve

exp.pressure

PTR3Patient flow

PTR4freshgas

PTR5Tank pressure

PTR6Peep valve

insp. pressure

Valve driver 2Valve driver 1

12VSAFTY

CIRCUIT

Connector P4 Connector P5

LED IndicatorsLED Indicators

12v valve 12v

Connector P6

Input switches

Block diagram pneumatic board


1.7.2 Schematic diagram

The schematic diagram of the pneumatic board is represented on the following pages.


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 9-Jan-2003 Sheet of File: C:\DOCUMENT\..\PNEUMATIC.sch Drawn By:







RD 34

WR 33

XTAL1 24XTAL2 23

ALE 43

TOSC119 TOSC218

RESET20

AREF62

AGND63

AVCC64

PEN 1

VCC52

GND 22GND53

VCC 21

ATm

ega103L

U1

ATMEGA103


ALE

VALVES

VALVES.sch

A8A9A10A11A12A13A14A15

SENSORS

SENSORS.sch

RDWR

RS485 DRIVER

PNEUSPI.sch

OC1

C11

1D2

2D3

3D4

4D5

5D6

6D7

7D8

8D9

1Q 19

2Q 18

3Q 17

4Q 16

5Q 15

6Q 14

7Q 13

8Q 12

U2

74HC573


ALE

GND

A0A1A2A3A4A5A6A7

A8A9A10

A11

A7

A13A14

A1

B2

C3

E14

E25

E36

Y0 15

Y1 14

Y2 13

Y3 12

Y4 11

Y5 10

Y6 9

Y7 7

U3

74HC138

A4$100*

$107*

A5A6

A15

A12

12

89

U4A

74HC4075

34

56

U4B

74HC4075

1112

1310

U4C

74HC4075


A010

A19

A28

A37

A46

A55

A64

A73

A825

A924

A1021

A1123

A122

A1326

WR27

CE20 OE22

A141

D0 11

D1 12

D2 13

D3 15

D4 16

D5 17

D6 18

D7 19

256

U5

RAM/ROM/FLASH



01 S1

01 S2

A14

WR

RD

01 S3

01 S4

A15

A14

WR

12

3

U6A

74HC02

45

6

U6B

74HC02

8

910

U6C

74HC02

WR

WR

CS0

CS1

VALSEL1

VALSEL2

PF0PF1PF2PF3PF4PF5PF6PF7

RST

PE1PE0

MISOMOSIPB1SS

VAL.CL12V ON/OFFPD3PD4PD5PD6PD7

VAL.EN.

GND GND

PNEUMATIC

JP-KDP

R1

100K

R2

100K

R3

100K

R4

100K

PF7PF6PF5

VCC

D4

HLM

P-17

00

R5

1K5

PB4

D3

HLM

P-17

00

R6

1K5

D2

HLM

P-17

00

R7

1K5

D1

HLM

P-17

90

R8

1K5

PB7PB6PB5

GND

PF4

VCC

GNDGND

VCC

PB4PB5PB6PB7VCC

R16100R

GND

ADINT

X1 6MHz

12345

109876

SW1

DS-05 APEM

C3100N

C133pF

C233pF

PNEU012000v1 v1.0

1 4


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 9-Jan-2003 Sheet of File: C:\DOCUMENT\..\VALVES.sch Drawn By:


12345678910

11121314151617181920

P4

HEADER 10X2

V1V2V3V4V5V6V7V8

D5 D6 D7 D8 D9 D10 D11 D12

12345678

161514131211109

R17

8*4K7

VCCGND

VAL.CLVALSEL1

VAL.EN.


12345678910

11121314151617181920

P5

HEADER 10X2

V9V10V11V12V13V14V15V16

D13 D14 D15 D16 D17 D18 D19 D20

12345678

161514131211109

R18

8*4K7

VCCGND

VAL.CLVALSEL2

VAL.EN.

D1 2

D2 3

D3 4

D4 5

D5 6

D6 7

D7 8

D8 9

Q118

Q217

Q316

Q415

Q514

Q613

Q712

Q811

E1 1

E2 19

U7

74HC541

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10 9

R198*100K

VCC

GND

RD

Q1

RFP30P05

+12v

Q2

BS170M

GND

12V

ON

/OFF


VCC

GND

CS2

VALVES

JP-KDP

A 1B 2CLR 3Q4

Q13

Cext 14

RCext 15

U8A

74HC123

RST

GND

VCC

12v val.

C21

100nF

C22

100nF

C23

100nF

C24

100nF

R20

100K

A 9B 10CLR 11Q12

Q5

Cext 6

RCext 7

U8B

74HC123

GND

COM 12OUT8 13OUT7 14OUT6 15OUT5 16OUT4 17OUT3 18OUT2 19OUT1 20

VDD 21

OE 22CLEAR1

IN13 STROBE2

INT24

INT35

INT46

INT57

INT68

INT79

INT810

GND11

MIC5801BN

U9

MIC5801BN

COM 12OUT8 13OUT7 14OUT6 15OUT5 16OUT4 17OUT3 18OUT2 19OUT1 20

VDD 21

OE 22CLEAR1

IN13 STROBE2

INT24

INT35

INT46

INT57

INT68

INT79

INT810

GND11

MIC5801BN

U10

MIC5801BN

D21 R29

4K7GND

1 23 45 67 89 10

P6

HEADER 5X2

PNEU012000v1 v1.0

R30

22K

R9

10K

C20

330N

2 4


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 9-Jan-2003 Sheet of File: C:\DOCUMENT\..\SENSORS.sch Drawn By:

AGND 15CH0 16CH1 17CH2 18CH3 19CH4 20CH5 21CH6 22CH7 23INT 24REFADJ 25REF 26VDD 27DGND 28CLK1

CS2

WR3

RD4

HBEN5

SHDN6

D77

D68

D59

D410

D3/D1111

D2/D1012

D1/D913

D0/D814

MA

X19

7

U11

MAX197


C26100pF

AGND

WRRDA0

CS3

VCC

ADINT

AGND

C270.01µF

AGNDAGND

SENSORS

JP-KDP

Vref COM12

Vref BG13

Vref 2.514

Vref 515

Vref 1016

Vref Out4

V+in6 RG9 RG8

V-in7

v- 3v+

1

slee

p2

Vo 10

SENSE 11

IAref 5

U12 INA125

VO-1

-Vexc 2

VO+3

+Vexc4 PTR1

SM5652-015-G-3-L

3

26

74

U18

OPA237

R10

RES

1

AGNDAGND Vref COM12

Vref BG13

Vref 2.514

Vref 515

Vref 1016

Vref Out4

V+in6 RG9 RG8

V-in7

v- 3

v+1

slee

p2

Vo 10

SENSE 11

IAref 5

U13 INA125

VO-1

-Vexc 2

VO+3

+Vexc4 PTR2

SM5652-015-G-3-L

3

26

74

U19

OPA237

R11

RES

1

AGNDAGND Vref COM12

Vref BG13

Vref 2.514

Vref 515

Vref 1016

Vref Out4

V+in6 RG9 RG8

V-in7

v- 3

v+1

slee

p2

Vo 10

SENSE 11

IAref 5

U14 INA125

VO-1

-Vexc 2

VO+3

+Vexc4 PTR3

SM5652-003-D-3-L

3

26

74

U20

OPA237

R12

RES

1

AGNDAGND Vref COM12

Vref BG13

Vref 2.514

Vref 515

Vref 1016

Vref Out4

V+in6 RG9 RG8

V-in7

v- 3

v+1

slee

p2

Vo 10

SENSE 11

IAref 5

U15 INA125

VO-1

-Vexc 2

VO+3

+Vexc4 PTR4

SM5652-003-D-3-L

3

26

74

U21

OPA237

R13

RES

1

AGNDAGND Vref COM12

Vref BG13

Vref 2.514

Vref 515

Vref 1016

Vref Out4

V+in6 RG9 RG8

V-in7

v- 3

v+1

slee

p2

Vo 10

SENSE 11

IAref 5

U16 INA125

VO-1

-Vexc 2

VO+3

+Vexc4 PTR5

SM5612-030-G-3-L

3

26

74

U22

OPA237

R14

RES

1

AGNDAGND

+12v SENSORS

CH

0

CH

1

CH

2

CH

3

CH

4

PATIENT PRESSURE PATIENT FLOWPEEP VALVE EXP. PRESSURE FRESH GAS FLOW TANK PRESSURE

Vref COM12

Vref BG13

Vref 2.514

Vref 515

Vref 1016

Vref Out4

V+in6 RG9 RG8

V-in7

v- 3

v+1

slee

p2

Vo 10

SENSE 11

IAref 5

U17 INA125

VO-1

-Vexc 2

VO+3

+Vexc4 PTR6

SM5652-015-G-3-L

3

26

74

U23

OPA237

R15

RES

1

AGNDAGND

+12v SENSORS

CH

5

PEEP VALVE INSP. PRESSURE

R21100K

R2310K

AGND

+12v

CH6

AGND

AGND

R22100K

R2410K

AGND

CH7

12v

val.

+C28

22µF

/35v

+

C29

47µF +

C30

47µF

C4

100N

C5

100N

C6

100N

C7

100N

C8

100N

CH0CH1CH2CH3CH4CH5CH6CH7

VCC

PNEU012000v13 4

v1.0

C34100N

C35

100N

C36

100N

C37

100N

C40

100N

C43

100N

C46

100N

C38

100N

C39

100N

C41

100N

C42

100N

C44

100N

C45

100N

C47

100N

C48

100N

C49100N

C11

100N

C33

100N

L1

22µH

C19

100N

AGND

+12v SENSORS +12v

R31 10

C18100N

AGND


1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4

Date: 9-Jan-2003 Sheet of File: C:\DOCUMENT\..\PNEUSPI.sch Drawn By:

DE1/RE11

DE2/RE24

DE3/RE35

DR12

DR23

DR36

RO47

DI48

DE49

RE410 GND 11OB4 12OA4 13OB3 14OA3 15

OB2 17OA2 18OB1 19OA1 20U24

SP495

SS

SS

MISOMISOMOSI

SCK



GND

AX12

AY13

BX2

BY1

CX5

CY3

A11

B10

C9

INH6

O/IA 14

O/IB 15

O/IC 4

U25

74HC4053

RST

PB1

PE1

PE0

PSCK

PMOSI

SCK

PMISO

GND

VCC 4

MR 3RST2

GND1U26

max811L

GND

VCC

1 23 45 67 89 10

P3

HEADER 5X2

VCC

GNDPSCKPMISO

PMOSI

GND

RST

PNEUMATIC SPI

JP-KDP

1

23

U27A

74HC00

GND

C25100nF

+12V

GND

GND

VCC

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 36

P1

HEADER 18X2

GND

C9100N

+ C31

22µF

+ C32

22µF

/35v

C10100N

GND GND

VCC

GND+12V

GND

MOSIAMISOASCKA

SSSLV0A

MOSIBMISOBSCKBSSSLV0B

GND GND

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 36

P2

HEADER 18X2

R25

5K6R26

5K6R27

5K6R28

5K6

MOSIA

MISOA

SCKA

MOSIB

MISOB

SCKB

SSSLV0A SSSLV0B

4

56

U27B

74HC00

9

108

U27C

74HC00

12

1311

U27D

74HC00

GND GND GND

C12100N

C13100N

C14100N

C15100N

C16100N

C17100N

VCC

GND

PNEU012000v14 4

v1.0


1.7.3 Build-in test software

• Start-up test After turning the ventilator on, the pneumatic board will test all his different functions. During start-up the following tests are executed:

o Microprocessor internal functions tests:

test internal program memory test internal SRAM memory test the timers test EEPROM memory test Watchdog

o Microprocessor external functions test

test external SRAM memory test external 12V safety valve test external A/D converter

o Microprocessor communication test

test the communication between pneumatic board and master board

When all these tests are executed successfully, the MMI board is ready to start working. If an error occurred, the type of error is displayed on the LED indicators.

G R R R After start-up the LED indicators can show the following errors:


G R R R


G R R R


G R R R


G R R R

Communication error


To determine the exact error on the pneumatic board, you have to perform a specific test by using the build-in test software. Note: During executing a specific test on the pneumatic board there will be

no communication between the master board and the pneumatic board. The master board will interpret this as a communication error and a continuous beep is audible. This can be very annoying. To prevent this error put the master board in internal test mode by setting dipswitch 1 high. See the master board section later in this manual for detailed instructions.

Note: The MMI board will also detect a communication error during a

executing a specific test on the pneumatic board. To prevent this error put the MMI board in internal test mode by setting dipswitch 1 high. See the MMI board section in this manual for detailed instructions.

• Microprocessor internal function test If a microprocessor internal error is detected, execute an internal function test as follow:

o Turn the Neptune ventilator off o Remove the upper cover plate at the back of the Neptune. o Change the dipswitch setting of the pneumatic board with a small

screwdriver to





INTERNAL FUNCTION TEST ERROR CODES


G R R R

0


G R R R

1

internal PROGRAM MEMORY error

G R R R

2

Internal SRAM error

G R R R

3


G R R R

4


G R R R

5


G R R R

6

Reserved

G R R R

7

Reserved


Resolve internal function test error code 4 – Internal EEPROM error

To fix error code 4 or internal EEPROM error follow the next steps:

o Turn the Neptune ventilator off. o Change the dipswitch setting of the pneumatic board with a small

screwdriver to


means that the pneumatic board EEPROM settings are reset. Turn the ventilator off

o Repeat the microprocessor internal functions test described on the previous page. If the EEPROM error still remains contact an authorized service engineer.

Warning: Reset from the pneumatic board EEPROM settings will AFFECT

the calibration parameters. Recalibration of the ventilator is necessary in this case. Refer to the maintenance and calibration procedure described later in this manual!


• Microprocessor external function test If a microprocessor external error is detected, execute an external function test as follow:


screwdriver to





EXTERNAL FUNCTION TEST ERROR CODES


G R R R

0


G R R R

1

reserved

G R R R

2

External SRAM error

G R R R

3

reserved

G R R R

4

reserved

G R R R

5

reserved

G R R R

6

reserved

G R R R

7

reserved

Note: The external function test is running continuously. When an error is

detected, the error is indicated on the LED indicators, and the external function test is repeated. It’s not necessary to turn the ventilator on and off to repeat the external function test.


Resolve external function test error code 2 – External SRAM error There is a problem with the external SRAM memory. The external SRAM memory is located on socket U5 on the pneumatic board. The microprocessor is reading data from and writing data to the external SRAM memory. Contact an authorized service engineer if the problem cannot be resolved.

• Pneumatic function test You can test all the pneumatic functions of the pneumatic board as follow:


screwdriver to


is blinking. Each valve of each valve driver is driven one by one. o If an error is detected, the error is indicated on the red error LED’s and



PNEUMATIC FUNCTION TEST ERROR CODES


G R R R

0


G R R R

1

Not able to start A/D converter

G R R R

2

A/D converter busy

G R R R

3

All A/D converter readings = $FFF

G R R R

4

All A/D converter readings = $000

G R R R

5

Not able to switch 12V safety circuit

OFF within 20 ms

G R R R

6

Not able to switch 12V safety circuit

ON within 20 ms

G R R R

7

No +12V input or +12V input too low


1.7.4 Pneumatic board layout


2. PNEUMATIC SYSTEM

2.1 PNEUMATIC DIAGRAM The pneumatic diagram of the Neptune ventilator is represented on the next page.


2.2 MANUAL / SPONTANEOUS MODE (MAN) If the Neptune is set to Man/Spont mode, the hand balloon is connected through the patient breathing circuit and absorber to the patient. Squeezing the manual bag will initiate an inspiration phase. The CO2 is removed by the soda lime in the canister. Mixed gas from hand balloon and fresh gas flow goes directly to the patient. During this phase, with the ventilator switched to Man/Spont mode, the patient pressure is monitored and shown on the display. If the patient pressure exceeds the upper limit pressure setting, an audible and visual alarm is set. In this mode, the safety valve on the manual bag will guarantee the maximum pressure level that can be set.

Man/Spont INSPIRATION


Releasing the hand balloon will initiate an expiration phase. The patient can breath out. At the end of the expiration, parameters like PEEP, frequency, PIP and tidal volume are calculated and shown on the display.

Man/Spont EXPIRATION


2.3 CONTROLLED MANDATORY VENTILATION (CMV) The system is built around the so-called "bag in bottle principle". The figure on the next page represents the inspiration and expiration phase in CMV mode. Tank T is filled with an initial pressure calculated by the pneumatic microprocessor. The initial pressure is calculated on the basis of an algorithm comprising the following parameters:

o Fresh gas flow o Total circuit resistance o Patient compliance o Hose system compliance o Frequency o I/E ratio o Tidal volume o PEEP o Leakage

The contents of tank T flows into the bottle during inspiration, so that a pressure rise will occur in it, and this will compress the bag. The gas flows via the MAN/CMV valve, flow sensor and absorber to the patient. During inspiration, the gas is routed through the soda lime. The patient pressure is shown on the barograph or on the graphic. During inspiration, the PEEP/upper limit pressure valve will contain the set upper limit pressure. As soon as the patient pressure exceeds this limit, gas will be evacuated from the patient circuit.

CMV INSPIRATION


During expiration, the patient breathes out into the bag via the soda lime in the absorber, the flow sensor and the MAN/CMV valve. The bottle venting valve is open, causing the pressure in the bottle to become equal to atmospheric pressure. If the fresh gas flow is higher than the consumption by the patient or leakage, as appropriate, the system would become overfilled. This is prevented by the evacuation of the surplus gas via the PEEP/upper limit valve (X6).

CMV EXPIRATION


2.4 PRESSURE CONTROLLED VENTILATION (PCV) In PCV mode the ventilator has to deliver the set peak pressure. At the start of inspiration the tank who is filled during last expiration is connected with bottle. This gives a decelerating flow, high at the start that comes to zero when the peak level is reached. V7 and V8 are used to give extra flow to keep the pressure at same level. For a smooth regulation activation from this valves is done in ‘PWM’ pulse wide modulation . V1,V2,V14,V15&V16 are used to open the bottle and keep the pressure at peak level. During the inspiration time ,the electronics will measure the patient pressure. If the pressure is not within limits a calculation is done to adjust the tank pressure setting for the next inspiration.. If the patient pressure becomes higher than the set peak pressure +5hPa/+5mbar, valve V13 will be set in expiration position, the amount of pressure that is too much can escape via the evacuation. When the patient pressure is within limits, valve V13 will be set in inspiration position. Each time valve V13 switches during inspiration the pressure in reservoir upper limit becomes lower.” The start pressure is 100hPa/100mbar”. During the expiration the exhaled patient flow is measured and tidal volume is calculated. If the PEEP (positive end expiration pressure) is higher than the set PEEP + 20hPa/+20mbar, the ventilator goes in Man/Spont mode and an error message is shown on display.


PCV EXPIRATION

PCV INSPIRATION


2.5 PEEP During expiration and a PEEP is set, a certain pressure is set behind the PEEP valve X6. This pressure is derived from the X6 back pressure during inspiration. At the start op expiration valve V13 is set to expiration mode. With a PEEP set, valve V9 is always on. Valve 10 is off for a certain time, during this time the back pressure from valve X6 can escape rapidly, to create the best expiration situation. Valve V10 is switched on after a certain time to load the PEEP reservoir with pressure. The time that valve V10 is switched on is calculated at the end of expiration, this time will be shorter for higher PEEP level and longer for lower PEEP level. PEEP regulation is the same for CMV and PCV mode. 2.6 Flush safety There is a detection when an oxygen flush is generated to prevent high pressure if the upper limit was set too high. The Max pressure allowed during an O2 flush is last peak pressure +20hPa / +20mbar, If the volume was stable and when this level (last pip +20 is below upper limit setting). When the upper limit alarm is lower ,the upper limit alarm level is used. The min level is 30hPa / 30mbar if upper limit is higher. When the upper limit alarm level is lower then the calculated safety, the upper limit alarm level has priority.


2.7 MECHANICAL CONSTRUCTION 2.7.1 Patient breathing unit There are four main parts in the patient unit that need to be distinguished:

o PEEP and upper limit pressure valve o MAN/CMV switching valve o Flow sensor o Latex free autoclavable bag

PEEP and upper limit pressure valve

MAN/CMV switching valve

Flow sensor


● PEEP and upper limit pressure valve Regulation of the PEEP and upper limit pressure is provided by the mushroom valve (C) which operates a plastic valve (D).

During inspiration, the value set for the upper limit pressure is applied to the mushroom valve causing this to expand and thus exert the same pressure on the plastic valve. When a pressure higher than the upper limit pressure is built up on the underside, the valve will be lifted and gas is able to escape via the evacuation. The plastic valve ensures that the pressure is uniformly distributed so that the noise made by the escaping air is attenuated. During expiration, the value set for the PEEP is applied to the mushroom valve. The exhalation curve thus approaches the PEEP gradually. There are no sudden transitions, which results in a “smoothed shape”. The upper limit pressure thus ensures that the patient is not exposed to too high pressures during inspiration, while the PEEP ensures - when expiration occurs - that sufficient pressure remains in the lung. This is only applicable in CMV and PCV mode.

Latex free autoclavable bag

C

D


● MAN/CMV switching valve The changeover valve is always in the unpowered state in the Man/Spont mode. The valve (G) is in fact pressed up by a spring so that the absorber is connected directly to the hand balloon. If the ventilator mode is changed to CMV or PCV, pressure reaches the switching diaphragm via connection E. The valve is thereby pressed down and the hand balloon shut off. When this occurs, the connection to the bag (F) is opened so that the absorber is now connected to the bag.

G

E

F


● Flow sensor The flow sensor is a derivative, developed by Medec Benelux NV, of the well- known Fleisch principle. To ensure laminar flow, special perforated rings are fitted. The flow sensor can measure flow up to 96 l/min. Differential pressure (∆P) is measured across the restriction by means of connections A and B, which are connected to transducer TRX3.

● Latex free autoclavable bag The bag is connected to the connection F intended for this purpose. It should be clearly understood that in the unpowered state (i.e. in the Man/Spont mode), the bag is not used. The bag is a special balloon and therefore cannot be replaced with a different type of balloon. Warning: Medec Benelux NV can only guarantee correct ventilator operation with the same type of balloon.


2.7.2 Bottle The feed-through plate of the bottle is provided with five connections. This plate ensures a gas-tight connection between the bottle and the patient breathing unit. This makes the patient breathing unit easy to remove and to clean.

A. MAN/CMV switching valve. B. PEEP and upper limit pressure valve. C. Outlet for gas evacuation from the mushroom valve. D. Measurement point, flow sensor positive. E. Measurement point, flow sensor negative and patient pressure.

The bag is inserted in the bottle after which the patient breathing unit is attached to the bottle by means of the whale clip. The bottle is manufactured from aluminum. On the back of the bottle, there are two valves:

o The bottle safety valve located on the top is adjusted to 120hPa/120mbar. So the pressure in the bottle (and thus also in the patients lung) never exceeds this value.

o The bottle venting valve located on the bottom ensures that during

inspiration, the bottle is shut off from the outside air so that the bag can be compressed. During expiration, this valve ensures that the bottle is vented, so that the bag can be filled again with the expired gas from the patient.

A B C

D

E


bottle safety valve

bottle venting valve

V12

V13

V1V2

V14V15V16

V9

V10V11V3

X3V7V9V6V5V8

X2


2.7.3 Supply tank The supply tank T (contents = 1,2 liter) provides the inspiration stroke volume. The tank is located around the bottle. The tank can be filled with the use of two low flow valves or one high flow valve. There’s another valve provided to connect the tank with the bottle.

The supply tank T

Bottle


2.7.4 Solenoid valves

The solenoid valves are special maintenance-free low-power valves. Because of the special design, in which there is no sliding core but a corrosion-resistant metal diaphragm, the valve processes a number of unique properties. The ring which connects the coil and the valve housing may be unscrewed one turn in order to attend to the electrical connections. Never unscrew the ring entirely, to prevent vital parts being lost or damaged. Note: Never change the order of diaphragm and spacer ring, since these are specially calibrated.


3. MAINTENANCE AND CALIBRATION

The aim of the maintenance and calibration procedure is to ensure proper and safe working of the Neptune ventilator. It must be performed by a qualified service engineer every 6 months. Always recalibrate the ventilator and execute a leaktest after replacing a component. 3.1 VISUAL INSPECTION Remove the cover plate of the Neptune ventilator.

• Electronic system

Ensure that all the boards of the extendable system set are mounted correctly.

Check that all electrical connectors are latched. Check all keyboard board switches for proper working Check control knob switch and rotation for proper working

• Pneumatic

Make sure that all tubes are properly connected and none are kinked or pinched.

Check the clear tubing for signs of water. If any is detected, replace the tubing or blow out the water by means of compressed air.

Check the air input water trap. Any presence of water must be removed by pressing the bottom pin of the water trap. Make sure that no water is flowing away into the ventilator.

Check the patient breathing system, the absorber and all external tubing.


3.2 BATTERY BACKUP The ventilator can work for at least 1 hour on battery when fully charged. Connect the ventilator for a couple of hours to the AC mains supply to assure a fully charged battery. Check the ventilator battery backup by means of the following instructions:

o Connect the power cord to the AC mains inlet o Turn the AC mains switch at the back of the ventilator ON o Turn the ventilator ON o There is a mains plug drawn at the top of the display which means that

the ventilator is working on AC mains supply o Set the ventilator to CMV mode o Check the battery backup by pulling the mains plug o There is a battery drawn at the top of the display which means that the

ventilator is working on battery If the ventilator shuts off in less than 1 hour, replace the battery by a new one. We recommend replacing the battery every 3 years. Always replace the battery with the same type and ratings. Note: The battery does not require maintenance under normal circumstances. Always replace with same type every three years.


3.3 THE CALIBRATION MENU Enter the calibration menu as follows:

o Turn the ventilator ON o Go to the Info menu o Press the buttons in the exact order as represented:

1

23

4

5


The calibration menu looks as follows:

1. Control buttons: with these buttons you can change the calibration settings, drive the +12 voltage of the valves, set valves on and off, etc.

2. Exit button: you can leave the calibration menu by pressing the exit button. The

changes made in the calibration menu are stored to the EEPROM memory of the pneumatic board.

3. Input indicators: the input pressure switches, connected to connector P6 on the

pneumatic board, are indicated over here. INPUT1 is connected to the air input pressure switch, INPUT2 is connected to the O2 input pressure switch and INPUT6 is connected to the N2O input pressure switch. INPUT3, INPUT4, INPUT5, INPUT7 and INPUT8 are not used.

4. Valve ON/OFF: you can set each valve individually ON and OFF.

5. +12V VALVES: you can turn the +12V voltage of the valves ON and OFF.

Make sure that you set the +12V VALVES voltage on when you are testing each valve individually. The ADC reading value is the value that the analog / digital converter (ADC), located on the pneumatic board, indicates during converting the +12V VALVES voltage to a digital value.

6. +12V SUPPLY: over here you can see a read-out of the digital value of the

+12V supply generated by the ADC converter. The +12V supply must always be present after turning the ventilator on.

7. Selection beam: you can scroll the selection beam through the calibration menu

by rotating the control knob. The function of the control buttons at the left is depending on the position of the selection beam.

8. Pressure transducers: each pressure transducer (TRX) can be calibrated

individually. TRX1 measures the airway pressure, TRX2 measures the PEEP pressure, TRX3 measures the patient flow located in the patient breathing unit,

1

2 3

4

5

7

8

9

6


TRX4 measures the fresh gas flow, TRX5 measures the tank pressure and TRX6 measures the upper limit pressure.

9. Service time: the service time is used to check the time between the last

maintenance and now. The service engineer has the possibility to zero this service time after the maintenance and calibration procedure is executed. The service timer is always running when the ventilator is on, regardless of standby mode, manual mode, PCV or CMV mode.


3.4 THE PRESSURE TRANSDUCERS

Zeroing the pressure transducer TRX1, TRX2, TRX5 and TRX6

o Disconnect patient breathing unit. o Close fresh gas. o Activate valve V5 to discharge the tank. o Move the selection beam to transducer TRX1. o Press the zero button. o Transducer TRX1 is now zeroed. o Repeat the 3 previous instructions for zeroing transducer TRX2, TRX5

and TRX6. Zeroing the pressure transducer TRX3 and TRX4 Warning: A zero and/or max. calibration of transducer TRX3 and/or TRX4

will erase the previous GAIN setting of the transducer. Make a note of these GAIN setting (they can be used later) before starting any zero or Max calibration transducer TRX3 and TRX4.

The pressure transducer TRX3 and TRX4 are used to measure flow. They measure the differential pressure across the flow sensor. The pneumatic microprocessor uses a look-up table of the sensor to convert differential pressure to flow (liter/minute). There can be a very small deviation between the look-up table and the flow sensor. You can eliminate this deviation by adjusting the GAIN of the selected pressure transducer (only applicable

TRX1 TRX2 TRX3

TRX4 TRX5 TRX6

1

2

34 5

6++

- -


on TRX3 and TRX4). You need a calibrated flow meter to compare the adjusted flow in the calibration menu with the reference flow measured. Warning: A zero and/or max. calibration of transducer TRX3 and/or TRX4

will erase the previous GAIN setting of the transducer. Adjustment of the GAIN is necessary to eliminate the deviation again.

o Be sure that the fresh gas is closed.

NOTE: It is not necessary to open the ventilator to do the zeroing TRX3. Be sure that patient breathing unit is disconnected.

o Move the selection beam to transducer TRX3. o Press the zero button. o Transducer TRX3 is now zeroed.

NOTE: Set back the factory setting from TRX3 where you have made a note from when only a zeroing from TRX3 is necessary.

When also a Max calibration will be done, restore of factory gain you have to do after the Max calibration.

NOTE: It is not necessary to open the ventilator to do the zeroing TRX4. Be sure that patient breathing unit is disconnected.

o Move the selection beam to transducer TRX4. o Set a fresh flow of 0,3 liters/min. o Press the zero button. o Close the fresh gas flow. o Transducer TRX4 is now zeroed.

NOTE: Set back the factory setting from TRX4 where you have made a note

from when only a zeroing from TRX4 is necessary. When also a Max calibration will be done, restore of factory gain you

have to do after the Max calibration.


Maximum calibration of pressure transducer TRX1, TRX2 and TRX6 To perform the maximum calibration of the pressure transducers, you need a calibrated pressure gauge, a T-piece, silicon tubes, syringe and a pneumatic test connector. Connect in accordance with the next drawing:

Calibration set

o Connect calibration set with transducer, see picture page 108 section 3.4 THE PRESSURE TRANSDUCERS

o Move the selection beam to transducer TRX1. o Connect the calibration set to pressure transducer TRX1 by way of the

pneumatic test connector. o Set a pressure of exactly 100hPa/100mbar by way of the syringe. o Check the OUT2 value of TRX1. If equal to 100hPa/100mbar, go to the

next step. If not, perform a max. calibration by pressing the max. button. The TRX1 OUT2 value is now equal to 100hPa/100mbar.

o Repeat the 4 previous instructions for the max. calibration of transducer

TRX2, and TRX6 in the same way. Maximum calibration of pressure transducer TRX3

o Move the selection beam to transducer TRX3. o Connect the calibration set to the positive port pressure transducer TRX3

see picture page 108. o Set a pressure of exact 20hPa/20mbar by way of the syringe. o Perform a maximum calibration of TRX3 by pressing the max. button. ▪ It’s possible to eliminate the deviation between the microprocessor look-

up table and the flow sensor to create an extremely accurate measurement of the flow. These steps are optional and can only performed when a calibrated digital flowmeter is available:

Connect to pressure transducer TRX by means of pneumatic test connector.


NOTE: When you don’t have a calibrated digital flowmeter, set back the factory GAIN by pressing the gain+ or gain- button. Gain+ and GAIN- are in steps of 5, set back the value that is nearest the factory value where you have made a note from.

Connect the digital flowmeter with one side to the left input connector of the patient breathing unit.

Disconnect handset from right side patient breathing unit. Connect other side from flowmeter with fresh gas front outlet.

Select fresh gas outlet front and push O2 flush. Make sure that no valves are active. Adjust the TRX3 OUT2 reading by manipulating the TRX3

GAIN. Change the GAIN by pressing the gain+ or gain- button. The digital flowmeter value must be equal to the TRX3 OUT2 reading.

Maximum calibration of pressure transducer TRX4

o Move the selection beam to transducer TRX4. o Connect the calibration set to pressure transducer TRX4 + port. o Set a pressure of exact 20hpa/20mbar by way of the syringe. o Perform a maximum calibration of TRX4 by pressing the max. button. ▪ It’s possible to eliminate the deviation between the microprocessor look-

up table and the flow sensor to create an extremely accurate measurement of the flow. These steps are optional and can only performed when an calibrated digital flowmeter is available:

NOTE: When you don’t have a calibrated digital flowmeter, set back the factory GAIN by pressing the gain+ or gain- button. Gain+ and GAIN- are in steps of 5, set back the value that is nearest the factory value where you have made a note from.

Set a fresh gas flow of 10 liters/min air. Make sure that no valves are active. Connect one side of the digital flowmeter to the fresh gas outlet at

the front of the Neptune ventilator. Make sure the fresh gas front output is selected. Leave the other side of the digital flowmeter open.

Adjust the TRX4 OUT2 reading by manipulating the TRX4 GAIN. Change the GAIN by pressing the gain+ or gain- button. The digital flowmeter value must be equal to the TRX4 OUT2 reading.


Maximum calibration of pressure transducer TRX5

o Place the pressure gauge between the tube that connects the pressure transducer TRX5 with the tank.

o Make use of VALVE7 or VALVE8 to build a pressure of 2000hPa/2bar in the tank.

o Regulate the pressure so the pressure gauge is indicating 2000hPa/2bar. Check the OUT2 value of TRX5. If equal to approximately 2000hPa/2bar, go to the next step. If not, perform a max. calibration by pressing the max. button. The TRX5 OUT2 value is now equal to 2000hPa/2bar

Checking the flow sensors readings

o Reconnect the absorber and the patient breathing system in a correct way. o Set a fresh gas flow for example of 4 liters/min. The TRX3 OUT2 and

TRX4 OUT2 value must be a positive value. If one of these readings is negative, you must check all tubes inside and outside the ventilator for proper connection.

Warning: Leave the calibration menu by pressing the exit button. Now you’re sure that all the changes made in the calibration menu are stored to the EEPROM memory!


3.5 THE PRESSURE REGULATORS

1. Air pressure regulator 3000hPa/3bar.

2. Air pressure regulator 500hPa/0.5bar.

12

X9

X10X6X7


Check / calibrate AIR pressure regulator 3000hPa/3bar (1).

o For the adjustment of the AIR pressure regulators, you need a test patient breathing unit.

Test patient breathing unit

o Make sure that the AIR input pressure is connected. Check the AIR input pressure on the manometer located on the front. The pressure must be higher than 3000hPa /3 bar.

o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Connect a pressure gauge with the connector output G. o Enter the calibration menu. o Set VALVE6 ON. Don’t forget to set the +12V VALVES voltage

ON. o Check the pressure gauge readings. If equal to approximately

3000hPa /3bar, go to the next step. Otherwise, unfasten the locking ring of the AIR pressure regulator 1 and adjust the pressure so it’s equal to 3000hPa/3 bar (+/- 100hPa /0.1bar) by means of rotating the spindle. Fasten the locking ring again so that the adjustment spindle is locked.

o Set VALVE6 OFF.


Check / calibrate AIR pressure regulator 500hPa/0,5 bar (2).

o Make sure that the AIR input pressure is connected. Check the AIR input pressure on the manometer located on the front. The pressure must be higher than 3000hPa /3bar.

o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Connect a pressure gauge with the connector output A. o Enter the calibration menu. o Set valve 13 and 11 ON. Don’t forget to set the +12V VALVES

voltage ON. o Check the pressure gauge readings. If equal to approximately 500hPa

/0,5 bar go to the next step. Otherwise, unfasten the locking ring of the AIR pressure regulator 2 and adjust the pressure so it’s equal to 500hPa /0,5bar (+/- 50hPa/0.5bar) by means of rotating the spindle. Fasten the locking ring again so that the adjustment spindle is locked.

o Set valve 13 &11 OFF.


3.6 THE FLOW REGULATORS For the adjustment of the flow regulators you need the test patient breathing unit and a flowmeter. Follow the next steps:

o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Connect a flowmeter with the connector output G. o Enter the calibration menu. o Set VALVE6 ON. Don’t forget to set the +12V VALVES voltage ON. o Check the flowmeter readings. If equal to 4 liters/min, go to the next step.

Otherwise, unfasten the locking ring of the flow regulator and adjust the flow so it’s equal to 4 liters/min (+/-0.1lpm) by means of rotating the spindle. Fasten the locking ring again so that the adjustment spindle is locked.


o Set VALVE6 OFF. o Connect the flowmeter with the connector output A. o Set VALVE11 and VALVE13 ON. o Check the flowmeter readings. If equal to 1.6 liters/min, go to the next

step. Otherwise, unfasten the locking ring of the flow regulator and adjust the flow so it’s equal to 1.6 liters/min (+/-0.1lpm) by means of rotating the spindle. Fasten the locking ring again so that the adjustment spindle is locked.

o Set all the valves OFF.


3.7 O2 FLUSH

o Connect flowmeter to front outlet. o Select the front fresh gas output. o Push O2 flush button.

o Check the flowmeter readings. If equal to 35 liters/min, go to the next

step. Otherwise, unfasten the locking ring of the flow regulator and adjust the flow so it’s equal to 35 liters/min (+/- 0.5lpm) by means of rotating the spindle. Fasten the locking ring again so that the adjustment spindle is locked.


3.8 THE INPUT PRESSURE SWITCHES To adjust the input pressure switches, follow the next steps:

o Regulate the pressure at the O2 NIST input connector until it’s equal to 2500hPa/2.5 bar (+/-100hPa /0.1bar).

o The input indicator I2 / O2 must be lit. If not, adjust the screw in the middle of the pressure switch until the I2 / O2 indicator is lit.

o Let the O2 NIST input pressure decrease slowly.

The I2 / O2 indicator will go out with a pressure equal to 2200hPa 2.2bar (+/-200hPa/0.2bar). Otherwise, adjust the screw a little bit more.

O2


o Repeat the previous steps to adjust the input pressure switch of N2O.

N2O


o Regulate the pressure at the AIR NIST input connector until it’s equal to 2 bar and set switch drive gas to AIR.

o The input indicator DRV must be lit. If not, adjust the screw in the

middle of the drive gas pressure switch until the I1 / DRV indicator is lit.

Set switch drive gas to AIR.

DRV


o Let the AIR NIST input pressure decrease slowly. o The I1 / DRV indicator will go out with a pressure equal to

1700hPa/1.7bar (+/-170hPa/0.17bar). Otherwise, adjust the screw a little bit more.

o Regulate the pressure at the AIR NIST input connector until it’s equal to

2000hPa /2 bar (+/-200hPa/0.2bar). o The input indicator AIR must be lit. If not, adjust the screw in the

middle of the drive gas pressure switch until the I3 / AIR indicator is lit.

AIR


o Let the AIR NIST input pressure decrease slowly. The I3 / AIR indicator will go out with a pressure equal to 2200hPa 2bar (+/-200hPa/0.2bar). Otherwise, adjust the screw a little bit more.


3.9 THE BOTTLE SAFETY VALVE This section of the manual describes the procedure to check and adjust the bottle safety valve:

o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Connect a calibrated pressure gauge to connector output C. o Connect connector output G to connector output D. o Set VALVE3 ON. o Set VALVE6 ON. o The pressure will increase until the bottle safety valves opens. o Check the pressure gauge readings. The valve relief pressure must be

equal to 120hPa/120mbar. If not, adjust the screw at the top of the bottle safety valve so that the pressure is equal to 120hPa/120mbar.

o Leave the calibration menu by pressing the exit button. o Reconnect the absorber and the patient breathing system in a correct way.


3.10 Peep valve calibration

• Connect tubes on patient circuit. • Cork patient Y • Go to calibration menu • Activate 12V valves. • Activate V3 & V6. • Set fresh gas flow 8Lpm

• Turn housing peep valve clockwise or counter clockwise and regulate until the reading on OUT2 for TRX1 = 01hPa /1mbar

• Set lock screw free before turning the peep housing.

Tighten lock screw ,don’t use high force when turning it in.

+ -


3.11 VALVES TEST This section of the manual describes how to check the different valves on there functionality and for possible leaks:

1. Leakage check V7,V8 and X2. o Enter the calibration menu. o Activate valve 5 and 12V valves to empty the TANK. o When Tank is empty, Set 12 v valves OFF and valve 5 OFF. o Verify or there is a pressure increase on sensor TRX5. If so, you have to

determine which valve is leaking. Check valves V7, V8, and X2/V4.

2. Leakage check Tank

o Enter the calibration menu. o Activate 12V valves. o Activate valve V7 and let the pressure in Tank increase to

1000hPa/1bar. o Close V7. o Verify or there is a pressure drop on sensor TRX5. o Pressure in tank may not drop more than 5hPa/5mbar in 1 minute. o In case of leakage, check connections with tank, check valve

X3/V5,check tank (O-rings).

3. Test V7, V8 , X2/V4 , X3/V5. o Enter the calibration menu. o Activate 12V valves. o Activate valve V7 and let the pressure in Tank and bottle increase to

1000hPa/1bar. o Close V7. o Check/replace V7 if loading from tank is not possible o Activate V5 to discharge tank. o Activate valve V8 and let the pressure in Tank and bottle increase to

1000hPa/1bar. o Close V8.


o Check/replace V8 if loading from tank is not possible Activate V5 to discharge tank.

o Activate valve V4 and let the pressure in Tank and bottle increase to 1000hPa/1bar.

o Close V4. o Check/replace X2/V4 if loading from tank is not possible o Activate V5 to discharge tank.

4. Leakage check Bottle.

o Enter the calibration menu. o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Use a tube to connect output connection C with output connection D. o Activate valve 5 and valve 3. o Activate valve V7 and let the pressure in Tank and bottle increase to

50hPa/50mbar o Switch valve 7 OFF. o Verify or there is a pressure drop on sensor TRX5. If so, you have to

determine which valve is leaking. Check valves X5, X1, V1,V2,V14,V15 and V16


5. Test V1, V2 , V14, V15and V16.

o Enter the calibration menu. o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Use a tube to connect output connection C with output connection D. o Activate valve 5 and valve 3. o Activate valve V7 and let the pressure in Tank and bottle increase to

50hPa/50mbar o Switch valve 7 OFF. o ActivateV1 o Pressure on TRX5 has be zero within 15 sec if not check/replace valve

V1 o Set valve V1 OFF o Activate valve V7 and let the pressure in Tank and bottle increase to



50hPa/50mbar o Switch valve 7 OFF. o ActivateV14


o Pressure on TRX5 has be zero within 15 sec if not check/replace valve V14

o Set valve V14 OFF o Activate valve V7 and let the pressure in Tank and bottle increase to




V16 o Set valve V16OFF



3.12 PERFORMING A LEAKTEST 3.12.1 Entering the leaktest menu Set the ventilator to standby mode and select leak test. Always disconnect the patient before entering the leak test menu. Note: It is not possible to enter the leak test menu when the airway pressure is greater than 2hPa/2mbar. Disconnect patient, so that pressure can decrease to 0hPa/0mbar. The leak test menu is drawn in accordance with the next drawing.


1. Patient circuit + internal bag button: press this button to select the patient breathing circuit and the internal balloon leaktest.

2. Patient circuit + handset button: press this button to select the patient

breathing circuit and the external handset.

3. EXIT: select and press encoder knob to leave the leaktest menu.

4. PEEP valve leakage detected: this message appears when the PEEP valve leakage test fails.

5. Information window: follow these instructions to perform a leaktest.

6. Barograph: indicates airway pressure.

6

1

4

2

5 3


3.12.2 Performing the leaktest You can perform a leaktest on:

- the patient breathing circuit and the external handset. - the patient breathing circuit and the internal balloon.

To perform a leaktest on the patient breathing circuit and the external handset, proceed as follows:

- Select . - Make all the connections in the patient breathing unit; see the operating

instructions of the CO2 absorber. - Close safety valve on handset. - Close / disconnect sample tube of gas monitor (optional). - Close the output of the Y-piece. - Set a fresh gas flow. - Let the airway pressure increase to 30 hPa. - Close the fresh gas flow. - The time in which the pressure decreases to 20 hPa must be

15 seconds or longer. If the leak test is not within the specifications, check all connections in the patient breathing circuit. If no leaks can be found, contact your service department. After successfully performing the previously described leaktest, you can perform a leaktest on the patient breathing circuit and the internal balloon. Proceed as follows:

- Select . - Close the output of the Y-piece. - Set a fresh gas flow. - Let the airway pressure increase to 30 hPa. - Close the fresh gas flow. - The time in which the pressure decreases to 20 hPa must be

15 seconds or longer. If the leak test is not within the specifications, check all connections in the patient breathing circuit. Also check the internal balloon for leaks. If no leaks can be found, contact your service department.


When is selected, at the same time the PEEP valve located in the patient breathing unit is filled once with a pressure of ±100hPa/±100mbar. The pressure in the PEEP valve will continuously be monitored. If a pressure drop is detected within 15 sec, the message "PEEP valve leakage detected" will be displayed:

To repeat the PEEP valve test, select

followed by To determine either the PEEP leakage is intern in the ventilator or extern in the patient breathing unit, remove the patient circuit from bottle and close the PEEP output with finger in accordance with next drawing.

Keep your finger on the PEEP output and repeat the PEEP valve test. If the PEEP valve test succeeds, the problem is located in the patient breathing unit, otherwise the problem is probably intern in the ventilator.

PEEP output


. Leakage in the patient breathing unit

o Check/replace mushroom valve and O-ring in the patient breathing unit. o Check/replace blue O-ring in feed-through plate.

. Leakage located in the ventilator

o Remove the patient breathing unit. o Connect the test patient breathing unit with the bottle. o Connect a calibrated pressure gauge to connector output A. o Set valve 13 and 12 ON. o Set valve 11 ON until the pressure is between 80-100hPa/80 – 100mbar. o Set valve 11 OFF. o Check the pressure gauge readings and check for pressure drop.


o Set valve 10 and valve 9 ON. o Set valve 13 OFF. o The PEEP reservoir will be filled with a certain amount off pressure

delivered by the UPPER LIMIT reservoir. o Check the pressure gauge readings and check for pressure drop. o Leave the calibration menu by pressing the exit button. o Reconnect the absorber and the patient breathing system in a correct way.

3.12.3 Leaving the leaktest menu

Leave the leaktest menu by selecting the exit . The ventilator will return to standby mode.


3.13 MAINTENANCE INSTRUCTIONS Warning: It is recommended that the Neptune should be checked at least twice a year by the Medec Benelux NV service department or by specially trained personnel. There are a number of parts which require either periodic maintenance or replacement.

Patient breathing unit

• The mushroom valve and the switching diaphragm are to be replaced each service.

• The MAN/CMV changeover valve is to be inspected at each service and if

necessary cleaned. It is replaced annually.

• The expiration valve (under the mushroom valve) is replaced annually. When fitting, it’s important to guide the valve gently onto its seating.

• Check the flow sensor at each service and clean with alcohol if necessary.

• Replace the O-rings (see detailed drawing patient breathing unit).

• Replace the bag.

Warning: Always replace with same type of bag to ensure satisfactory performance. In fact, the specifications of the Neptune are greatly dependent on the elasticity of the balloon. Warning: Never immerse the patient breathing unit in a liquid and only fit a dry unit!


8

16

16

2 7

9

10

10

4

1

10

10

6


Bottle

• The blue O-ring connections between the patient breathing unit and the bottle are checked and tested for gas tightness at each service. Replace the O-rings every two years.

3 11

12

13

13

14


Solenoid valves

• The solenoid valves must be checked for proper working each service time.

Bottle venting valve

• Replace the bottle venting valve on the back of the bottle at each service.

Bottle safety valve

• Check the bottle safety valve annually and, if necessary, re-adjust to ±120hPa/120mbar.

5


Fresh gas flow sensor

• Inspect the sensor annually for pollution. The sensor can be checked easily by removing the plug on the side.


3.14 PARTS LIST

• Service Parts – Patient Circuit (half-yearly check)

Item Quantity Description Part number 1 1 Switching diaphragm 121213000 2 1 Mushroom valve 121227000 3 1 Gas bag 250035000 4 1 O-ring 19X1 501190100

• Service Parts – Patient Circuit (annual check)

Item Quantity Description Part number 1 1 Switching diaphragm 121213000 2 1 Mushroom valve 121227000 3 1 Gas bag 250035000 4 1 O-ring 19X1 501190100 5 1 Venting valve 121250000 6 1 Valve 121236000 7 1 Expiration valve 124228000 8 1 O-ring 14 x 1,78 silic. 70° shore 505140100 9 1 O-ring 18 x 2 501180200 10 4 O-ring 32 x 2 501320200 11 1 O-ring 58 x 3,5 501580300 12 1 O-ring 25 x 2,5 501250100 16 2 O-ring 23.52 x 1,78 501235100

• Service Parts (two-yearly check)

Item Quantity Description Part number 13 4 O-ring 3 x 3 silic. 70° blue 505030300 14 1 O-ring 10 x 3 silic. 70° blue 505100500

• Service Parts (tree yearly check)

Item Quantity Description Part number 15 1 Battery 12v 7.2 Ah 668202000


4. CLASSIFICATION AND DISCARD

4.1 CLASSIFICATION

• Class I/ Type B/ IPX1. • Do not use in presence of flammable anaesthetics.


4.2 DISCARD There is no risk for explosion when discarding. The electronic boards and display contain a small amount of lead. The battery is a sealed lead acid type. Please adhere to governmental related laws or regulations when discarding the Neptune.


5. Inspection

5.1 VISUAL INSPECTION o Wheels and brakes.

Check or the can rotate freely and verify or the brakes can be activated. o Drawer unit.

The drawer must go in and out drawer case smoothly. o Absorber.

Empty canister, check glass on visual damage. o Clean valve domes ,the dome glass must be free of contamination, valves must be visual without

removing the valve domes. o Check suction jar on visual damage. o Check ventilator case, front layers, pressure gauges , keyboard , display and knobs on visual

damage. o Check flowmeter glass and spindles on visual damage. o Check cover plate on visual damage. o Check manual balloon and arm, the arm must move freely with no visual damage. o Check patient circuit tubing o Check / clean AIR input pressure watertrap reservoir . The watertrap glass must be free of

contamination so that, in case there is water inside it is visual from the outside. Check filter inside watertrap and replace when contaminated. Check wheels and brakes.


5.2 OTHER INSPECTIONS 1.Ventilator keyboard & encoder: The functionality from the keys and encoder can be tested in the mode setup, the silent button can be tested in MAN mode. 2.Speaker test: The functionality speaker can be tested in setup A beep is generated when the volume level is changed. 3.Mains/ battery indicator : Set mains switch on and check mains indicator on Keyboard. Set ventilator ON. Check mains indicator on display. Set mains switch OFF and check batttery indicator, Led on keyboard must go OFF. 4.Fan and filter: The Fan has to rotate without making high noise level. Check filter at the bottom, replace/ clean if necessary.

5.Battery: Set mains switch OFF and verify or the ventilator can work for 1 hour on battery. Before starting this test be sure that the ventilator was connected with the mains power for at least 4 hours.

6.Internal connections: Check internal tubing and electrical connections. All tubing must be clear ,replace tubing who have indications from contamination or humidity. 7.Pressure regulators: See technical manual section 3.5 THE PRESSURE REGULATORS.


8.Flow regulators: See technical manual section 3.6 THE FLOW REGULATORS 9.O2 Flush: See technical manual section 3.7 O2 FLUSH 10.Pressure switches: See technical manual section 3.8 THE INPUT PRESSURE SWITCHES 11.ZERO and MAX calibration transducers : See technical manual section 3.4 THE PRESSURE TRANSDUCERS 12.Bottle safety valve: See technical manual section 3.9 THE BOTTLE SAFETY VALVE 13.Valve test: See technical manual section 3.10 VALVES TEST 14.Front absorber selector: Set selector knob in front position and verify or fresh gas comes out on front. Try to go in MAN mode. Check message on screen “Low Drive pressure” or “Fresh gas front output selected”. Set selector knob in absorber position and verify or fresh gas comes out on absorber. 15.Suction:

Be sure that vacuum is connected on ventilator.

Set Suction ON , block input suction jar and check for negative pressure on pressure gauge. Set suction OFF, No negative pressure may be seen on pressure gauge when blocking the input from the suction jar with the suction selector in OFF position. 16. Handset safety valve: Set the valve in close position and perform a leakage test. Close patient Y and set flow of 10Lpm Open fresh gas flow and verify max pressure, when valve is completely closed The max pressure that can build up is 60 hPa +/_ 5hPa 17.O2 Measurement: Go to setup menu section O2 calibration and perform a 21% and 100% calibration.


Check also wire and connection with O2 cell. See users manual section

18.Connections: Check all external connection’s. 19.Absorber:

See technical manual Absorber

20.Flowmeter:

See technical manual Flowmeter

21.Gasovac: See technical manual Gasovac 22.Leaktest: See technical manual section 3.11 PERFORM A LEAKTEST 24.AERTH connection and mains output:

Disconnect the mains power cable and measure resistance between earth connection on mains plug and earth connection on mains outlet on top cover plate. The resistance must be less then 0.2 Ohm. Measure resistance between earth connection on mains plug and cover plate The resistance must be less then 0.2 Ohm. 25.Working: Connect ventilator with test lung. Let the ventilator work in CMV mode with following parameters. TV: 500 PEEP 0hPa Freq: 16 Insp.Pause 0 I:E 1/2 Freshgas 1LPM Check volume on display with volume on testlung.


6. TROUBLESHOOTING

Error code: 01 7 segment display code

Tidal volume : Err Peak : 01 Plateau : 01

LCD display Error detected / error 01 / MMI board / Internal program memory error

Problem: MMI board - Internal program memory error

Action: See section 1.4 MMI BOARD- Microprocessor internal function test.



LCD display Error detected / error 02 / MMI board / Internal SRAM error

Problem: MMI board - Internal SRAM error




LCD display Error detected / error 03 / MMI board / Internal timer error

Problem: MMI board - Internal timer error





LCD display Error detected / error 04 / MMI board / Internal EEprom error

Problem: MMI board - Internal EEprom error Action: Reset display parameters. See section 1.4 MMI BOARD- Microprocessor internal function test Resolve internal function test error code 4 – Internal EEPROM error



LCD display Error detected / error 05 / MMI board / Internal watchdog error

Problem: MMI board - Internal watchdog error




LCD display Error detected / error 11 / MMI board / External flash error

Problem: MMI board - External flash error

Action: See section 1.4 MMI BOARD- Microprocessor external function test Resolve external function test error code 1 – External flash error




LCD display Error detected / error 12 / MMI board / SRAM error

Problem: MMI board - External SRAM error

Action: See section 1.4 MMI BOARD- Microprocessor external function test Resolve external function test error code 2 – External SRAM error



LCD display Error detected / error 13 / MMI board / external display driver error

Problem: MMI board - External display driver error

Action: See section 1.4 MMI BOARD- Microprocessor external function test Resolve external function test error code 3 – External display driver error

Error code: 15 7 segment code


LCD display Error detected / error 15 / MMI board / 7 Segment lockup

Problem: MMI board – 7 segement lockup

Action: See section 1.4 MMI BOARD- Microprocessor internal function test Perform the internal function test See section 1.4 MMI BOARD- 7 segment display test

Perform the 7 segment display test




LCD display Error detected / error 16 / MMI board / Barograph lockup

Problem: MMI board – barograph lockup

Action: See section 1.4 MMI BOARD- Microprocessor internal function test Perform the internal function test See section 1.4 MMI BOARD- barograph test

Perform the barograph test



LCD display Error detected / error 17 / MMI board / Frontleds lockup

Problem: MMI board – Frontleds lockup

Action: See section 1.4 MMI BOARD- Microprocessor internal function test Perform the internal function test See section 1.4 MMI BOARD- led indicator test

Perform the led indicator test



LCD display Error detected / error 18 / MMI board / Buzzer lockup

Problem: MMI board – buzzer lockup

Action: See section 1.4 MMI BOARD- Microprocessor internal function test Perform the internal function test See section 1.4 MMI BOARD- buzzer test

Perform the buzzer test




LCD display Error detected / error 19 / MMI board / LCD lockup

Problem: MMI Board - LCD lockup

Action: See section 1.4 MMI BOARD- Microprocessor internal function test Perform the internal function test See section 1.4 MMI BOARD- showing a test pattern on the graphic display

Perform the lcd pattern test See section 1.4 MMI BOARD- Microprocessor external function test Resolve external function test error code 3 – External display driver



LCD display Error detected / error 20 / MMI board / keyboard / encoder failure

Problem: MMI board - Keyboard controller – Other failure Problems with keyboard layer/circuit or the encoder knob.

Action: Verify that there is no key pressed. Verify the encoder knob is not locked. See section 1.4 MMI BOARD- Keyboard test

Perform the keyboard test See section 1.4 MMI BOARD- Encoder test Perform the encoder test



LCD display Error detected / error 28 / communication 25 ms timeout

Problem: Board communication error - 25 ms timeout Communication with other boards is not possible.

Action: A communication problem can be the result from problems on the display board but also from problems on other boards.


In case of communication error: Perform an internal test for all boards.

And verify or the tests on all boards pass. See section 1.4 MMI BOARD - Microprocessor internal function test. See section 1.7 MASTER BOARD - Microprocessor internal function test. See section 1.8 PNEUMATIC BOARD - Microprocessor internal function test.

Perform an external test for all boards. See section 1.4 MMI BOARD – Microprocessor external function test. See section 1.7 MASTER BOARD - Microprocessor external function test. See section 1.8 PNEUMATIC BOARD - Microprocessor external function test.

Perform a communication test between MASTER and DISPLAY board See section 1.7 MASTER BOARD - Communication test between master board and display board

Perform a communication test between MASTER and PNEUMATIC board

See section 1.7 MASTER BOARD - Communication test between master board and pneumatic board

Error code: 29

7 segment code Tidal volume : Err Peak : 03 Plateau : 02

LCD display Error detected / error 29 / Parity error start-up

Problem: Board communication error - Parity error start-up Communication with other boards is not possible.

Action: Same action as for Error code: 28



LCD display Error detected / error 30 / parity error start-receive byte

Problem: Board communication error - Parity error start-receive byte Communication with other boards is not possible.





LCD display Error detected / error 31 / Receive string length error

Problem: Board communication error - Receive string length error Communication with other boards is not possible.




LCD display Error detected / error 32 / Eot counter out of range

Problem: Board communication error - Eot counter out of range Communication with other boards is not possible.




LCD display Error detected / error 33 / Target slave not ready

Problem: Board communication error - Target slave not ready Communication with other boards is not possible.





LCD display Error detected / error 34 / Transmit string wrong

Problem: Board communication error - Transmit string wrong Communication with other boards is not possible.




LCD display Error detected / error 41 / Pneumatic board / Global error

Problem: Pneumatic board global error.

Action: Perform an internal test on pneumatic board.

See section 1.8 PNEUMATIC BOARD - Microprocessor internal function test.

Perform an external test on pneumatic board. See section 1.8 PNEUMATIC BOARD - Microprocessor external

function test.



LCD display Error detected / error 44 / Pneumatic board / Not able to start A/D converter

Problem: Pneumatic board – Not able to start A/D converter Problem with analog digital converter on pneumatic board.

Action: Perform an external test on pneumatic board. See section 1.8 PNEUMATIC BOARD - Microprocessor external function test.


Error code: 45 Tidal volume : Err Peak : 00 Plateau : 00

LCD display Error detected / error 45 / Pneumatic board / A/D converter busy time-out

Problem: Pneumatic board – A/D converter busy time-out Problem with analog digital converter on pneumatic board.



LCD display Error detected / error 46 / Pneumatic board / A/D readings equal to $FFF

Problem: Pneumatic board – A/D readings equal to $FFF Problem with analog digital converter on pneumatic board.



LCD display Error detected / error 47 / Pneumatic board / A/D readings equal to $000

Problem: Pneumatic board – A/D readings equal to $000 Problem with analog digital converter on pneumatic board.




LCD display Error detected / error 48 / Pneumatic board / Internal EEPROM memory error

Problem: Pneumatic board – Internal EEPROM memory error

Action: Perform an internal test on pneumatic board. See section 1.8 PNEUMATIC BOARD - Microprocessor internal function test Resolve internal function test error code 4 – Internal EEPROM error Reset from the pneumatic board EEPROM settings will AFFECT the calibration parameters. Recalibration of the ventilator is necessary in this case. Refer to the maintenance and calibration procedure described this manual!


LCD display Error detected / error 49 / Pneumatic board / +12V input voltage too low

Problem: Pneumatic board – 12V input voltage too low

Action: Check 12V voltage on DC/DC converter.

Connector P1:

Pin number Description 3 +12V DC output voltage 4 GND

Perform a Pneumatic function test.

See section 1.8 PNEUMATIC BOARD - Pneumatic function test.



LCD display Error detected / error 50 / Pneumatic board / +12V valves enable circuit error

Problem: Pneumatic board – 12V valves enable circuit error Input voltage is OK but circuit can’t switch ON the 12V valve voltage

Action: Disconnect valve connectors Perform. Perform a Pneumatic function test.

See section 1.8 PNEUMATIC BOARD - Pneumatic function test. Check for bad valve or short circuit if test is OK when valve

connectors are disconnected. Check circuit Q1 / Q2 when test is not OK and valve connectors

are disconnected. Q1

RFP30P05

+12v

Q2

BS170M

GND

A 1B 2CLR 3Q4

Q13

Cext 14

RCext 15

U8A

74HC123

GND

VCCR20

100K

R30

22K

R9

10K

C20

330N



LCD display Error detected / error 51 / Pneumatic board / +12V valves disable circuit error

Problem: Pneumatic board – 12V valves disable circuit error Input voltage is OK but circuit can’t switch the 12V valve voltage OFF.

Action: Disconnect valve connectors Perform. Perform a Pneumatic function test.

See section 1.8 PNEUMATIC BOARD - Pneumatic function test. Check circuit Q1 / Q2

Q1

RFP30P05

+12v

Q2

BS170M

GND

A 1B 2CLR 3Q4

Q13

Cext 14

RCext 15

U8A

74HC123

GND

VCCR20

100K

R30

22K

R9

10K

C20

330N


Error code: 51


LCD display Error detected / error 52 / Pneumatic board / Not able to fill tank

Problem: Pneumatic board – Not able to fill tank

A. When first starting in CMV or PCV mode the tank is filled with pressure for the first inspiration. There is a time limit on this filling and when this time is exceeds ERROR message 52 “Not able to fill tank ”is set on screen. B. During CMV or PCV mode, the tank will be filled with a calculated pressure during expiration, this filling has to be done before new inspiration starts. When this filling is still busy when new inspiration starts, ERROR message 52 “Not able to fill tank ”is set on screen.

Action: Situation A:

Low input pressure or selector knob fresh gas in front position and input pressure switch disabled.

Check selector knob fresh gas front absorber. Check input pressure ,more than 3000hPa/3bar. Check or input pressure switches are in ON position

Go to next step when previous checks are OK When the switches are in OFF position, the software will not check for low level input pressure and will try to fill tank by activating valve V4 or V7 and V8.When this filling is not possible within time, ERROR message 52 “Not able to fill tank ”is set on screen.

Go to calibration menu. Activate 12v valves. Activate valve V5 to discharge Tank. Verify tank pressure must be 0hPa/0mbar. Perform a zero calibration tank if not zero. Set valve V5 OFF. Activate valve 4 and let pressure in tank increase up to 2000hPa

2bar and set valve V4 OFF. If not possible, check valve 4 and X2.and connection V4.

Activate valve V5 to discharge Tank. .Set valve V5 OFF. Activate valve 7,let pressure in tank increase up to 2000hPa / 2bar

and set valve V7 OFF. If not possible, check valve 7 and connection V7.



set valve V8 OFF. If not possible, check valve 8 & connection V8.

Situation B: Low input pressure or selector knob fresh gas to front position

switched during CMV or PCV mode and input pressure switch disabled.

Check selector knob fresh gas front absorber. Check input pressure ,more than 3000hPa / 3bar. Check or input pressure switches are in ON position

Go to next step when previous checks are OK When the switches are in OFF position, the software will not check for low level input pressure and will try to fill tank by activating valve V4 or V7 and V8.When this filling is not possible before next inspiration starts, ERROR message 52 “Not able to fill tank ”is set on screen.

Go to calibration menu. Activate 12v valves. Activate valve V5 to discharge Tank. Verify tank pressure must be 0hPa / 0mbar. Perform a zero calibration tank if not zero. Set valve V5 OFF. Activate valve 4 and let pressure in tank increase up to 2000hPa

2bar and set valve V4 OFF. If not possible, check valve 4 and X2. and connection V4.





Error code: 53


LCD display Error detected / error 53 / Pneumatic board Not able to stop tank filling

Problem: Pneumatic board –Not able to stop tank filling When the tank is filled and the valves to fill the tank are switched OFF a check is done or the pressure is within limits. If the pressure is higher than the calculated value ERROR message 53 “Not able to stop tank filling ”is set on screen.


A. When first starting in CMV or PCV mode, the tank will be discharged before filling. This has to be done within time .if not ERROR message 53 “Not able to stop tank filling ”is set on screen, because of high pressure in tank. B. During CMV or PCV mode, the tank will be filled with a calculated pressure during expiration, at the end of expiration the pressure in the tank is checked with the calculated pressure. When this pressure is higher then the calculated pressure value ERROR message 53 “Not able to stop tank filling ”is set on screen.

Action: Situation A:

Low input pressure or selector knob fresh gas in front position and input pressure switch disabled.

Check selector knob fresh gas front absorber. Check input pressure ,more than 3000hPa/3bar. Check or input pressure switches are in ON position

Go to next step when previous checks are OK When the switches are in OFF position, the software will not check for low level input pressure and will try to discharge tank pressure by activating valve V5.Activation from valve 5 is done electrical but X3 is pneumatically driven and activation will be not possible when there is no pressure. When discharging is not possible within time, ERROR message 53 “Not able to stop tank filling ”is set on screen.

Go to calibration menu. Activate 12v valves. Activate valve V5 to discharge Tank. If not possible check X3,V5 and connection V5. When X3/V5 is OK verify tank pressure, must be 0hPa / 0mbar. Perform a zero calibration tank if not zero. Perform a leakage check V7,V8 and X2

See section 3.10 VALVES TEST / Leakage check V7,V8 and X2.

Situation B: Checked Tank pressure at end of expiration is higher than

calculated value.

Go to calibration menu. Activate 12v valves. Activate valve V5 to discharge Tank. Verify tank pressure must be 0hPa / 0mbar. Perform a zero calibration tank if not zero. Set valve V5 OFF. Perform a leakage check V7,V8 and X2 See section 3.10 VALVES TEST / Leakage check V7,V8 and X2.


Error code: 54


LCD display Error detected / error 54 / Pneumatic board / Tank low flow valve close time

Problem: Pneumatic board – Tank low flow valve close time When the tank is filled and the valves to fill the tank are switched OFF a check is done or the pressure is within limits. If the pressure is higher than the calculated value and valves V7 and V8 are used to fill tank, ERROR message 54 “Tank low flow valve close time” is set on screen.

Action: Go to calibration menu. Activate 12v valves. Activate valve V5 to discharge Tank. Verify tank pressure must be 0hPa / 0mbar. Perform a zero calibration tank if not zero. Set valve V5 OFF. Perform a leakage check V7,V8


Error code: 55


LCD display Error detected / error 55 / Pneumatic board / Tank high flow valve close time

Problem: Pneumatic board – Tank high flow valve close time When the tank is filled and the valves to fill the tank are switched OFF a check is done or the pressure is within limits. If the pressure is higher than the calculated value and valve V4 / X2 is used to fill tank, ERROR message 55 “Tank high flow valve close time” is set on screen.

Action: Go to calibration menu. Activate 12v valves. Activate valve V5 to discharge Tank. Verify tank pressure must be 0hPa / 0mbar. Perform a zero calibration tank if not zero. Set valve V5 OFF. Perform a leakage check valve X2.




LCD display Error detected / error 56 / Pneumatic board / End exp. pressure to high

Problem: Pneumatic board – End exp. pressure to high In CMV and PCV, the pressure is checked at the end of expiration. When this pressure is higher than the PEEP setting + 20 the ventilator Stops the working mode, switch over to manual and error message is set on screen.

Action: Check evacuation port at back side ventilator for obstruction.

Error code: 57


LCD display Error detected / error 57 / Pneumatic board / PIP press. higher than upp.lim

Problem: Pneumatic board – PIP press. higher than upp.lim. At end of inspiration CMV or PCV, the pip pressure is checked. If higher than the upper limit +20 hPa / +20mbar (MAX 105hPa / 105mbar) the ventilator stops the working mode, switch over to manual and error message is set on screen.

Action: Check PEEP valve in patient breathing unit. Check valve V13 and V10


LCD display Error detected / error 57 / Pneumatic board / Not able to lower tank pressure

Problem: Pneumatic board – Not able to lower tank pressure. At start of expiration the tank is filled with pressure. When there is already a pressure in the tank that is higher than the calculated pressure, the tank pressure will be discharged. If this is not possible before next inspiration starts, the software will see that the discharging was still busy and an error message 58 is set on screen.

Action: Check valve V5 and X3.


CHECKLIST NEPTUNE. Done by:…………………….. Serial number:……………… Date:………/………/………… Total working hours:………

conform

Y/N

Remarks

1

Visual inspection

2

Keyboard & encoder

3

Speaker

4

Mains / battery indicator

5

Fan & filter

6

Battery

7

Internal connections

8

Pressure regulators

9

Flow regulators

10 O2 Flush

11

Pressure switches

12

Calibration transducer

13

Bottle safety valve

14

Valve test

15

Front/ absorber selector

16

Handset safety valve

17

Suction

18

O2 Measurement

19

Connections

20

Absorber

21

Flowmeter

22

Gasovac

23

Leak test

24

Earth connection

25

Working


CHECKLIST NEPTUNE. Replaced parts:

Part Nummer Quantity

Remark

121213000 Switching diaphragm

121227000 Mushroom valve

250035000 Gas bag

501190100 O-ring 19X1

121250000 Venting valve

121236000 Valve

124228000 Expiration valve

505140100 O-ring 14 x 1,78 silic. 70° shore

501180200 O-ring 18 x 2

501320200 O-ring 32 x 2

501580300 O-ring 58 x 3,5

501250100 O-ring 25 x 2,5

501235100 O-ring 23.52 x 1,78

505030300 O-ring 3 x 3 silic. 70° blue

505100500 O-ring 10 x 3 silic. 70° blue

668202000 Battery 12v 7.2 Ah

Neptune Service Manual

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Transcript of Neptune Service Manual