DIFP20
Differential pressure transmitter
explosion-protected, explosion-proof enclosure
B 403023.0
Operating Instructions
2014-03-18/00556414
DANGER!
Failure of the differential pressure transmitter or an instrument attached to it
could possibly lead to dangerous malfunctions! Suitable preventive measures
must be in place to prevent this from happening.
NOTE!
Please read these Operating Instructions before placing the instrument in
operation. Keep the Operating Instructions in a place which is accessible to
all users at all times.
All necessary settings are described in this manual. If any difficulties should
nevertheless arise during start-up, please do not manipulate the unit in any
way. You could endanger your rights under the instrument warranty!
Please contact the nearest subsidiary or the head office in such a case.
3.2 Order details ...................................................................................... 10
3.3 Accessories ....................................................................................... 11
3.4 Software ............................................................................................ 11
3.5 Dimensions ........................................................................................ 12
4
Technical data ....................................................................
15
4.1 General .............................................................................................. 15
4.2 Input ................................................................................................... 16
4.3 Output ................................................................................................ 16
4.4 Voltage supply ................................................................................... 16
4.5 Mechanical properties ....................................................................... 16
4.6 Ambient conditions ............................................................................ 17
4.7 Accuracy ............................................................................................ 18
4.8 Approvals/marks of conformity ......................................................... 19
5
Mounting .............................................................................
21
5.1 Before mounting ................................................................................ 21
5.2 Unscrewing the front ring or housing cover ...................................... 21
5.3 Rotating the LCD (display) ................................................................. 22
5.4 Rotating the enclosure ...................................................................... 23
5.5 Pressure connection .......................................................................... 23
5.6 Holder for wall and pipe mounting .................................................... 24
5.7 Level measurement with diaphragm seals ........................................ 25
5.8 Hazardous (Ex) area mounting .......................................................... 27
6
Installation ..........................................................................
29
6.1 Installation instructions ...................................................................... 29
6.2 Cable gland ....................................................................................... 32
Contents
1 Safety information ............................................................... 5
1.1 Warning symbols ................................................................................. 5
1.2 Note symbols ....................................................................................... 5
2 General information ............................................................. 7
2.1 Scope of application ............................................................................ 7
2.2 Scope of delivery ................................................................................. 7
3 Instrument identification ..................................................... 9
3.1 Nameplate ........................................................................................... 9
Contents
7
Operation ............................................................................
35
7.1 Display ............................................................................................... 35
7.2 Operation with rotary knob or with setup program ........................... 36
7.3 The level concept .............................................................................. 37
8
Maintenance .......................................................................
43
8.1 Eliminating errors and faults .............................................................. 43
9
Declaration of Conformity .................................................
45
10
Type Examination Certificate ...........................................
47
5
1 Safety information
1.1 Warning symbols
DANGER!
This symbol indicates that personal injury caused by electrical shock may occur if the
respective precautionary measures are not carried out.
CAUTION!
This symbol in connection with the signal word indicates that damage to assets or data
loss will occur if the respective precautionary measures are not taken.
1.2 Note symbols
NOTE!
This symbol refers to important information about the product, its handling, or additional
use.
1 Safety information
6
7 7
2 General information
2.1 Scope of application General information
The Arkon DIFP20 differential pressure transmitter combines maximum precision with
simple operation. It is used to measure the differential pressure of gases, vapors and
liquids. The integrated LCD shows measurement values and device data.
The enclosure and sensors are made from high-quality stainless steel. It is also possible to
connect remote seals for special process engineering applications (see data sheets 409772
to 409784).
The transmitter is programmable, making it readily adaptable to a variety of different
measurement tasks. A user-friendly setup program is available as an accessory, for operation
via interfaces. A rotary knob ensures highly convenient and fast local, manual operation.
Use in "Ex areas"
The differential pressure transmitter is approved for use in hazardous "Ex areas". The
instrument is explosion-proof and can be mounted in Zone 1.
2.2 Scope of delivery Operating instructions B 403023.0
Operating instructions are a guide for mounting, electrical connection, starting up and
operating the Arkon DIFP20. Calibration certificate
The differential pressure transmitter comes with a calibration certificate and a SETUP
printout. These documents contain information about the set parameters or measured
parameters for the relevant differential pressure transmitter.
If the calibration certificate is lost, or if you need another copy, this can be ordered from
Arkon. Please provide the serial number of the differential pressure transmitter ("F-Nr" on the
nameplate). Your supplier's address can be found on the back of the manual.
Setup program
The setup program is available as an accessory: Part no. 00537577
The setup program provides a convenient way to check and adjust all the parameters of the
differential pressure transmitter. It also includes additional functions such as:
• Recording measurement values
• Graphical presentation of temperature and pressure
• Extensive diagnostic messages
• Display of the complete order code and instrument configuration (for reordering).
The setup program accesses the differential pressure transmitter via
• the Arkon interface (standard)
• or the HART® interface (optional)
8 8
2 General information 3 Instrument identification
CAUTION!
The Arkon interface must not be used in hazardous (Ex) areas!
These instruments must only be operated with the rotary knob!
PC interface cable
Available as an accessory: PC interface cable including USB/TTL converter and two adapters
(USB connecting cable), part no. 00456352.
The PC interface cable can be used to connect the differential pressure transmitter to the
USB interface of a PC via the Arkon interface.
HART® modem
Available as an accessory: HART® modem for USB, part no. 00443447.
The HART® modem can be used to connect the differential pressure transmitter with the
USB® interface of a PC via the HART® interface. Remote seals
Available as an accessory: See data sheets 409770 to 409786.
Remote seals are used for adaptation to special applications, when conventional pressure
connections cannot be used.
CAUTION!
Remote seals are installed in the factory and must not be separated from the differential
pressure transmitter!
9 9
2 General information 3 Instrument identification
a
3.1 Nameplate Enclosure
Marking on the enclosure of the differential pressure transmitter:
(2)
(4)
(6)
(1)
(3)
(5)
(7)
DIFP20 403023/x TN 12345678 CAL 0...1 bar
-1...1 bar DC 11.5...36 V 4...20 mA HART
F-Nr: 0012345601010300001
II 1/2G Ex d IIC T6...T4 Ga/Gb
II 2D Ex t IIIC T105°C Db
-40°C T 60°C (T6)
/70°C (T5) /85°C (T4)
IP66 Baujahr 2010
SEV 10 ATEX 0127 X
(1)
Type
(2)
Part no.
(3) Factory setting for measuring range (4) Nominal measuring range
(5) Voltage supply (6) Output signal
(7) Seriela number
Date of manufacture
The date of manufacture (year and calendar week) of the instrument in encoded in the serial
number. Numbers 12 to 15 identify the year of manufacture (here 10 is 2010) and the
calendar week (here 30).
10 10
3 Instrument identification 3 Instrument identification
3.2 Order details
(1) Basic type
403023 Arkon DIFP20 - Differential pressure transmitter, Ex-protected,
explosion-proof enclosure
(2) Basic type extension
0 None
9 Special design
(3) Display
0 Without display
1 With display
(4) Operation
0 Without control knob
1 With control knob
(5) Nominal measuring range of input
530 -10 to +10 mbar DP
531 -1 to +1 bar DP
532 0 to 1 bar DP
533 -1 to +6 bar DP
534 -1 to +100 bar DP
(6) Output
405 4 to 20 mA two-wire
410 4 to 20 mA two-wire with HART®
(7) Process connection
511 2× pressure connection 1/4-18 NPT, to EN 837
998 Suitable for connecting to a diaphragm seal
(8) Process connection material
20 Stainless steel
80 Tantaluma
82 Hastelloy® C276, mat. no. 2.4819a
(9) Measuring system filling medium
01 Silicon oil
02 Halogenated oil
(10) Extra codes
000 None
100 Customized settingb
226 With GOST-R approval
227 With INMETRO approval
624 Free of oil and grease
633 With mounting kit for wall and pipe mounting
634 With TAG number (explain TAG no. by order)
635 With manufacturer declaration NACEc
681 Extended admissible ambient temperature
11 11
3 Instrument identification 3 Instrument identification
694 Increased nominal pressure PN420d
12 12
3 Instrument identification 3 Instrument identification
a Not for nominal measuring range 530 (-10 to +10 mbar DP). b Please specify required setting in plain text. For factory setting, see "Accuracy" section in data sheet. c Only with process connection material 82 (NiMo). d Only in conjunction with nominal measuring range 532 (0 to 1 bar) or 533 (-1 to +6 bar) or 534 (-1 to +100 bar).
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Order code / - - - - - - - / ...
Order example 403023 / 0 - 1 - 1 - 532 - 405 - 511 - 20 - 01 / 000
3.3 Accessories
Article Part no.
PC interface with USB/TTL convertera 00456352
HART® modem USBb 00443447
SET oval flange 1/2" NPT/accessories set 7/16-20UNF 00543775
Mounting kit, set includes 7/16-20 UNF screws 00543777
Data Sheet
Manifolds 409706
Pressure separator with milk pipe fitting DIN 11851 409772
Pressure separator with clamp connection 409774
Pressure separator with DRD flange or Varivent connection 409776
Pressure separator with ISS connection or SMS connection or RJT connection and
slotted ring nut
409778
Diaphragm chemical seals 4MDV-10 409780
Pressure separator with male thread ISO 228/1 or ANSI B 1.201 409782
Pressure separator with flange connection EN 1092-1 with sealing lip Form B1 409784
Pressure separator with flange connection to ANSI B 16.5 with sealing lip Form RF 409786
Ex-i Power supply/input isolating amplifier 707530
a The PC interface cable is the connection between the Arkon interface of the differential pressure transmitter and
the USB interface of a PC. b The HART® modem is the connection between the HART® interface of the differential pressure transmitter and
the USB interface of a PC.
3.4 Software
Article Part no.
Arkon Setup DIFP20 series 00537577
13 13
3 Instrument identification 3 Instrument identification
3.5 Dimensions
A
A = Cable gland M20 × 1.5
14 14
3 Instrument identification 3 Instrument identification
For extra code 694 (increased nominal pressure PN420)
A
deep
for mounting
A = Cable gland M20 × 1.5
3 Instrument identification 4 Technical data
14
4 Technical data 4 Technical data
15 15
4.1 General
Reference conditions DIN 16086, EN 60770 and DIN IEC 770/5.3
Sensor system
Pressure transfer medium
For measuring system 1 filling medium
For measuring system 2 filling medium
Permissible load changes
Siliziumsensor mit Edelstahl-Trennmembrane
Silicon oil
Halogenated filling oil
> 10 million
Location
Mounting position
Calibration position
Position-dependent zero point offset
Any
Device standing vertically, process connection on bottom
1 mbar
Zero point correction possible locally or via setup
Display
Alignment
Size
Color
LCD, two-line with bar graph
Display unit can be rotaded 90° at a time
Case can be rotaded ±160°
Display field 22 mm × 35 mm/font size 7 mm/5 digits
Black
Measurement unit display options
Input pressure
Measurement value
Output current
Sensor temperature
inH2O, inHg, ftH2O, mmH2O, mmHg, psi, bar, mbar,
kg/cm2, kPa, Torr, MPa, mH2O
% or scaled with a freely adjustable unit
mA
°C, °F
Additional display data Minimum pressure, maximum pressure, error, overrange,
underrange, operating hours
Operation
Local
Setup program
With rotary knob and LCD
Via interface
Interface
Standard
For output 410 (4 to 20 mA with HART®)
Arkon interfacea, socekt on front of instrument
Arkon interfacea and HART® interface
Explosion protection EC type examination certificate SEV 10 ATEX 0127 X
II 1/2G Ex d IIC T6 to T4 Ga/Gb
II 2D Ex t IIIC T105 °C Db
a Neither the Arkon interface nor the HART®
interface must be used in potentially explosive atmospheres! In
this situation, the instrument must only be operated with the rotary knob!
NOTE!
For special conditions see chapter 4.6 "Ambient conditions", page 17.
4 Technical data 4 Technical data
16 16
4.2 Input
Nominal pressure
Nominal measuring range
Nominal pressure (bar)
-10 to +10 mbar
DP
-1 to +1 bar
DP
0 to 1 bar
DP
-1 to +6 bar
DP
-1 to +100 bar
DP
PN2 PN210 PN210, optional PN420
4.3 Output
Analog output
For output 405
For output 410
Step responsing time T60
Damping
4 to 20 mA two-wire
4 to 20 mA two-wire with HART®
190 ms without damping
adjustable 0 to 100 s
Burden
For output 405 (4 to 20 mA)
For output 410 (4 to 20 mA with HART®)
Burden (UB-11.5 V) ÷ 0.022 A
Burden (UB-11.5 V) ÷ 0.022 A;
also: min. 250 , max. 1100
4.4 Voltage supply
Voltage supply DC 11.5 to36 V
4.5 Mechanical properties
Process connection
Material
Membrane
For process connection 20 (stailess steel)
For process connection 82 (Hastelloy®)
For process connection 80 (Tantalum)
Flange
Seal
Stainless steel 316L
Hastelloy® C276, mat. no. 2.4819
Tantalum
Stainless steel 316
PTFE
Case
Case material
Cover material
Control knob material
For operation 0 (without control knob)
For operation 1 (with control knob)
Precision casting 1.4408
Precision casting 1.4408, seal FPM
-
PA
Explosion protection EG type examination certificate SEV 10 ATEX 0127 X
II 1/2G Ex d IIC T6 to T4 Ga/Gb
II 2D Ex t IIIC T105 °C Db
4 Technical data 4 Technical data
17 17
Weight
For extra code 694
(increased nominal pressure)
Approx. 4.0 kg
The instrument weight increases by approx. 3.8 kg.
4 Technical data 4 Technical data
18 18
4.6 Ambient conditions
Permissible
temperatures
In Operation
Storage
Version Category Max. medium
temperature
Ambient
temperaturea
Extended ambient
temperature
(extra code 681)a, b
II 1/2G Ex d T6 +70 °C -40 to +60 °C -50 to +60 °C
T5 +85 °C -40 to +70 °C -50 to +70 °C
T4 +110 °C -40 to +85 °C -50 to +85 °C
II 1/2D Ex d T105 °C +100 °C -40 to +85 °C -50 to +85 °C
-40 to +85 °C
Permissible relative humidity
In operation
Storage
100 % incl. condensation on instrument outer sleeve
90 % without condensation
Permissible mechanical loading
Vibration performance
Shock resistance
2 g, 10 to 500 Hz to DIN EN 60770-3
15 g for 6 ms to IEC 60068-2-29
Electromagnetic compatibility
Interference emission
Interference immunity
To EN 61326
Class B
Industrial
Protection IP 66 to DIN EN 60529
a Restricted function below -20 °C: stationary use, increased danger of broken cable, display does not function;
below -30 °C operation is not possible. b In the range of -40 to -50 °C, the cover with the instrument viewing pane must also be protected against
mechanical shock and impact. For details please contact Arkon.
4 Technical data 4 Technical data
19 19
4.7 Accuracy
Differential pressure
Nominal measuring
range
-10 to +10 mbar
DP
-1 to +1 bar
DP
0 to 1 bar DP -1 to +6 bar
DP
-1 to +100 bar
DP
Factory setting
for measuring range
0 to 10 mbar 0 to 1 bar 0 to 1 bar 0 to 6 bar 0 to 100 bar
Minimum span 1 mbar 5 mbar 5 mbar 0,350 bar 2,5 bar
Turndown ratio (r) r 20 r 400 r 200 r 20 r 40,4
Linearity for a linear
characteristic
as %
of the set span
0.1 %
for r 2
0.07 %
for r 10
0.07 %
for r 10
0.07 %
for r 5
0.07 %
for r 5
r × 0.05 %
for 2 r 20
r × 0.007 %
for 10 r 400
r × 0.007 %
for 10 r 200
r × 0.014 %
for 5 r 20
r × 0.014 %
for 5 r 40.4
Accuracy at +20 °C
as %
of the set span
0.2 %
for r 2
0.1 %
for r 10
0.1 %
for r 10
0.1 %
for r 5
0.1 %
for r 5
r × 0.1 %
for 2 r 20
r × 0.01 %
for 10 r 400
r × 0.01 %
for 10 r 200
r × 0.02 %
for 5 r 20
r × 0.02 %
for 5 r 40.4
Accuracy at
-20 to +85 °C
as %
of the set span
0.5 %
for r 2
(up to +60 °C)
0.2 %
for r 10
0.2 %
for r 10
0.2 %
for r 5
0.2 %
for r 5
r × 0.25 %
for 2 r 20
(up to +60 °C)
r × 0.02 %
for 10 r 400
r × 0.02 %
for 10 r 200
r × 0.04 %
for 5 r 20
r × 0.04 %
for 5 r 40.4
Accuracy at -
40 to +20°C
as %
of the set span
1.0 %
for r 2
0.6 %
for r 10
0.6 %
for r 10
0.6 %
for r 5
0.6 %
for r 5
r × 0.5 %
for 2 r 20
r × 0.06 %
for 10 r 400
r × 0.06 %
for 10 r 200
r × 0.12 %
for 5 r 20
r × 0.12 %
for 5 r 40.4
Accuracy at
+60 to +85°C
as %
of the set span
2.0 %
für r 2
r × 1.0 %
for 2 r 20
Effect of static
pressure P (bar)
as % of the nominal
measuring range
1 % P ×
0.0005 %
P ×
0.0003 %
P ×
0.0025 %
P × 0.001 %
Long-term stability
as % of the nominal
measuring range
0.6 %/year 0.1 %/year 0.1 %/year 0.1 %/year 0.2 %/year
4 Technical data 4 Technical data
20 20
4.8 Approvals/marks of conformity
Mark of
conformity
Testing
laboratory
Certificate/
certification number
Test basis Valid for
ATEX electrosuisse SEV 10 ATEX 0127 X EN 60079-0
EN 60079-1
EN 60079-26
EN 60079-31
403023/...
INMETRO CEPEL CEPEL 13.2214X IEC 60079
IEC 60529
Extra code 227
GOST-R
4 Technical data 5 Mounting
20
5 Mounting 5 Mounting
21 21
5.1 Before mounting
DANGER!
he system must be depressurized before mounting Arkon DIFP20
differential pressure transmitter!
In potentially explosive atmospheres, only open the differential pressure transmitter once it
has been de-energized!
NOTE!
The installation location should be easily accessible, if possible in the vicinity of the measu-
ring point, and low in vibration. The permissible ambient temperature must be maintained
(note any possible heat radiation).
The Arkon DIFP20 differential pressure transmitter can be mounted above or below the
pressure tapping point.
5.2 Unscrewing the front ring or housing cover The front ring and rear housing cover can be unscrewed once the locking screws (1) have
been released. A 1.5AF hex key is required to release the locking screws.
NOTE!
Use a screwdriver, or similar, for unscrewing.
Only tighten by hand!
(1)
5 Mounting 5 Mounting
22 22
5.3 Rotating the LCD (display) Installation position
The nominal position of the Arkon DIFP20 differential pressure transmitter is standing
vertically.
Depending on the specific features of the measuring point, the differential pressure
transmitter can be installed in any other location. The LCD display can be rotated in 90°
increments to reach the preferred installation position.
✱ Unscrew the front ring, see chapter 5.2 "Unscrewing the front ring or housing cover", page
21.
✱ Pry out the electronics module with a narrow (small) screwdriver.
✱ Rotate the electronics module to the preferred position (in 90° increments) and reinsert it.
✱ Screw on the front ring finger-tight.
✱ Securely tighten the locking screw.
5 Mounting 5 Mounting
23 23
5.4 Rotating the enclosure The enclosure can be rotated ± 160°.
✱ Loosen the threaded pin with a 1.5 mm AF hex key
(approx. 1/2 revolution is enough).
✱ Rotate the enclosure to the preferred position.
✱ Retighten the threaded pin securely.
5.5 Pressure connection Seals
Operating conditions (for example material compatibility) must be considered when selecting
the seal.
Check for leaks
If the pressure connection is made, it must be checked for leaks.
DANGER!
Improper operation of the shut-off fittings can result in physical injury or cause considerable
damage to equipment!
Follow the specified order for opening and closing valves!
For use in toxic media the device must not be vented!
5 Mounting 5 Mounting
24 24
Differential pressure
NOTE!
The connection for higher pressure is marked "H".
5.6 Holder for wall and pipe mounting (Part no. 00543777)
Mounting example
5 Mounting 5 Mounting
25 25
H
h (
leve
l)
5.7 Level measurement with diaphragm seals
For DP level measurement of liquids in a closed tank with diaphraghm seals,
the DP transmitter has to be mounted according to the following graphic.
• PLUS input side at top
• MINUS input side at bottom
• DP transmitter between top and bottom, or at bottom.
The exact position of the DP transmitter is not relevant.
diaphr. seal
+ h (4..20 mA) I
p -
mounting bracket
5.7.1 General notes
A pressure transmitter with capillaries and diaphragm seals forms a closed system, which is
filled with oil under vacuum.
• This closed system must not be opened.
• Do not clean or touch the membranes of the diaphraghm seals with hard or sharp tools.
• Remove the membrane protection just before installation.
• Bending radius for capillaries: 100 mm.
• Avoid vibrations during operation as much as possible.
• The capillaries on both sides should have the same temperature during operation.
If necessary, use isolation in cool or warm environment.
5 Mounting 5 Mounting
26 26
5.7.2 Configuration Configuration without level input (blind setting)
Range Start (4 mA):
Set P5 [mbar]
=
H × oil × g × 0.01
Range End (20 mA):
Set P6 [mbar] = (H × oil - hmax × liq) × g × 0.01
Explanation:
H [mm] = vertical spacing of diaphragm seals
hmax [mm]
oil [g/cm3]
=
=
maximum level of measured liquid, 0<hmaxH
0.96, density of oil in capillary
liq [g/cm3] = density of measured liquid
g [m/s2] = 9.81, gravitational acceleration
Example:
Tank height = 10 m
H [mm] = 9000
hmax [mm] = 8000
liq [g/cm3] = 1.00, density of water, 4 °C
Set P5 [mbar] = 9000 × 0.96 × 9.81 × 0.01 = 847.6
Set P6 [mbar] = (9000 × 0.96-8000 × 1.00) × 9.81 × 0.01 = 62.8
Result:
The ouput signal of the DP transmitter is proportional to level h:
4 mA for empty tank
20 mA for full tank
Configuration with level input
Range Start (4 mA):
When tank is empty:
Set P2 [mA] = 4.00
Range End (20 mA):
When tank is full:
Set P3 [mA] = 20.00
Result:
The ouput signal of the DP transmitter is proportional to level h:
4 mA for empty tank
20 mA for full tank
5 Mounting 5 Mounting
27 27
5.8 Hazardous (Ex) area mounting
(2) (3)
(4) (5)
+
-
(1)
(1) Hazardous (Ex) area Zone 0 / 21
(2) Hazardous (Ex) area Zone 1 / 21
(3) Non-hazardous area
(4) Burden (optional for the HART® interface)
(5) Power supply
5 Mounting 6 Installation
28
6 Installation 6 Installation
29 29
6.1 Installation instructions
GEFAHR!
The electrical connection must only be implemented by suitably qualified personnel!
Ground the instrument!
Only use cable entries or glands, blanking plugs, etc., that are suitable for the "explosion-
proof enclosure d" protection type!
The cables or leads must be suitable for the ambient conditions!
Connection openings on the instrument that are open must be closed with suitable
blanking plugs!
General
Applicable requirements must be followed for the electrical connection, especially in a
potentially explosive atmosphere:
Regulation concerning electrical systems in areas with an explosion hazard (Elex V).
Requirement for project planning, selecting and setting up electrical systems in areas with an
explosion hazard (IEC 60079-14:2007).
EC type examination certificate
Electromagnetic compatibility meets the requirements of EN 61326.
Der Messumformer ist für den Einsatz in SELV- oder PELV-Stromkreisen nach Schutzklasse 3
geeignet.
Apart from faulty installation, incorrect settings on the instrument may also affect the proper
functioning of the subsequent process or lead to damage. You should therefore always pro-
vide safety equipment that is independent of the instrument and it should only be possible for
qualified personnel to make settings.
Conductor cross-sections and ferrules
Permissible cross-section
Without ferrule (for rigid cable only)
0.2 to 1.5 mm2
AWG 24 to 16
With ferrule (for rigid or flexible cable)
0.25 to 0.75 mm2
6 Installation 6 Installation
30 30
Danger
The Arkon interface must not be used in potentially explosive atmospheres!
The differential pressure transmitter power supply must neither exceed nor fall below the
following values:
DC 11.5 to 36 V
NOTE!
Connecting the HART® communicator or HART® modem is optional.
To ensure error-free communication, a minimum burden must be present on the signal
circuit; see below.
6 Installation 6 Installation
31 31
6.1.1 Connection diagram
(2) (3)
(4)
+ (5) -
(6)
(7)
(1) (8)
(9)
(1) Hazardous (Ex) area Zone 0/21
(2) Hazardous (Ex) area Zone 1/21
(3) Non-hazardous area
(4) Burden for HART® (UB-11.5 V) ÷ 0.022 A additional min. 250 , max. 1100
(5) Power supply
(6) Indicator or recorder, controller, PLC, etc.
(7) Additional instruments
(8) HART® modem
(9) PC or notebook
6 Installation 6 Installation
32 32
6.2 Cable gland General information
• The cables or leads must be suitable for the ambient conditions
• Permissible cable diameters range from 7.5 to 11.9 mm
• Max. wire cross-section 1.5 mm2
• Keep signal leads separate from cables with voltages of 60 V
• Use a shielded cable with twisted wires
• Avoid the vicinity of large electrical systems
• The full specification as per HART
Version 5.1, will only be achieved with a shielded
cable.
2
1
3
~ 270°
(1) The connecting cable must extend at least 5 mm into the enclosure.
(2) Tighten the screw fitting by hand until you encounter resistance.
(3) Tighten the screw connection about 3/4 revolution with a wrench.
6 Installation 6 Installation
33 33
Connection
✱ Unscrew the housing cover from behind.
See section 5.2 "Unscrewing the front ring or housing cover", page 21.
✱ To connect the connecting cables, see the following illustration.
CAUTION!
Once electrical connection is complete, re-tighten the locking screw of the housing cover!
Terminal assignment
Connection Terminal assignment
Voltage supply DC 11.5 to 36 V 1 L+
2 L-
Output
4 to 20 mA, two wires
Impressed current 4 to 20 mA
in voltage supply
1 L+
2 L-
Current output test connection
Inherent resistance of ammeter 10
TEST +
TEST -
HART® test connection
The burden must be present!
HART +
HART -
Functional ground 3
Grounding or equipotential bonding outside, on the
enclosure
6 Installation 6 Installation
34 34
Operation and test
(1)
(2)
(3)
+
-
1 2 3+ -
(4)
(5)
HART -
HART + Test +
Test -
(1) Total burden: Burden (UB-11.5 V) ÷ 0.022 A;
for HART® in addition: min. 250 , max. 1100
(2) Indicator or recorder, controller, PLC, etc.
(3) Voltage supply: DC 11.5 to 36 V
(4) HART® modem
(5) PC or notebook
35 35
7 Operation
7.1 Display
(1)
(2)
(3)
(6) (5) (4)
(1) Socket for the Arkon setup interface (behind a cover)
(2) Measurement value
(3) Unit of measure
(4) Overrange
(5) Output current (4 to 20 mA)
(6) Underrange
36 36
7 Operation 7 Operation
7.2 Operation with rotary knob or with setup program
(1)
The instrument can be
• operated with the rotary knob (1)
• or with the optional setup program.
Instead of operation by rotary knob, all the actual values and parameters can be displayed
or set very easily, by means of the setup program. In addition, the setup program offers a
series of useful additional functions such as:
• Recording measurement values
• Graphical presentation of temperature and pressure
• Extensive diagnostic messages
• Display of complete order code and instrument configuration (can be printed out, for
example for project documents or reordering).
The setup program can optionally access the instrument through the following interfaces:
• Arkon setup interface.
The PC interface cable with USB/TTL converter (USB connecting cable) is required to
connect the PC with the instrument: part no. 00456352.
• HART® interface.
A HART® modem is required to connect the PC with the instrument: part no. 00443447.
37 37
7 Operation 7 Operation
Rotate and press
Rotate
Select parameters or adjust values.
Press
Confirm parameters or values.
7.3 The level concept
Two levels
Operation is on two levels:
NOTE!
After the instrument is turned on, it is at the display level. You can go to the parameter level
through the following operation.
Display level
(normal display)
> 3 s
Parameter level
Cancel
or timeout
> 3 s
< 1 s > 3 s
Find Select Save
Parameter
38 38
7 Operation 7 Operation
7.3.1 The display level
The measured pressure and other parameters are shown at display level. The output current
is shown as a percentage in a bar diagram on the third line of the display.
It is not possible to change the parameters at display level!
Action Display
(example)
Explanation
Display of pressure with unit of measure.
Display of measurement value as a %
or
Measurement value scaled with a freely selectable unit of
measure.
Display of output current in mA.
Display of sensor temperature in °C or °F.
Display of the saved minimum pressure in the selected unit of
measure.
Display of the saved maximum pressure.
Display of the pressure value and sensor temperature in the
selected unit of measure.
39 39
7 Operation 7 Operation
7.3.2 The parameter level
Instrument parameters can be displayed and changed at parameter level.
Action Display
(example)
Explanation Selectiona
P min
Saved minimum pressure
Reset by
> 3 seconds
P max
Saved maximum pressure
Reset by
> 3 seconds
P0 Den
"Density" density correction
0.01 to 1.00 to 99.99
P1 Uni
"Unit" unit of measure for
pressure
inH2O
inHG
ftH2O
mmH2O
mmHG
PSI
bar mbar
kg/cm2
kPa
TORR
MPa
mH2O
P2 mA
Range start current
4.00 to 20.00 mA
P3 mA
Range end current
4.00 to 20.00 mA
P4 sec
Damping
0.0 to 100.0 s
P5 RS
Range start
Nominal measuring range
7 Operation 7 Operation
Action Display (example)
Explanation Selectiona
P6 RE
Range end
Nominal measuring range
P7 Zero
Zero-point adjustment
Current pressure
P8 mA
Current sensor
3.60 to 4.00 to 21.60 mA
P9 Err
Current in case of error
ErLo = 3.6 mA
ErHi = 21.6 mA
LASt = Last value
P10 Key
Keyboard lock
O = No lock
LA = All, interface free
LO = All, without range start
LS = All, without range start and
end
LALL = All, incl. interface
P11 Chr
"Characteristic" curve
Lin = Linear
SLin = Linear until start of
root extraction
SoFF = Off until start of
root extraction
P12 %
Point at which root extraction
begins
5.0 to 9.4 to 15.0%
of nominal measuring range
P13 SWV
Software version
Editing not possible
P14 Uni
Unit of measure for
temperature
°C / °F
P15 OFF
Pressure value offset
(zero point offset)
Nominal measuring range
40
7 Operation 7 Operation
41
Action Display
(example)
Explanation Selectiona
P16 SCS
Scaling start
-9999 to 0 to 9999
P17 SCE
Scaling end
-9999 to 100 to 9999
P18 SCD
Scaling decimal point
Auto = automatic
0 = no places after decimal point
1 = 1 place after decimal point
2 = 2 places after decimal point
3 = 3 places after decimal point
P19 %
Unit for scaling
% (factory setting) kg/sec
kg/min
kg/h
t/min
t/h
l/sec
l/min
l/h
m3/sec
m3/min
m3/h
L
m3
UsrTXT
P20 h
Operating hours
Editing not possible
a Factory setting is shown in bold.
7 Operation 7 Operation
42
43
8 Maintenance
8.1 Eliminating errors and faults
Error/fault Possible cause Remedy
Display: none No power supply Turn on the power supply
Instrument faulty Send the instrument to the supplier
for repairs
Display: Overrange,
overpressure
Bring the pressure back into the
measuring range or adjust the
measuring range Display: Underrange,
underpressure
Display: Pressure can no longer be
displayed,
overpressure
Adjust scaling or unit of measure
Display: Pressure can no longer be
displayed,
underpressure
Display: The connection between sensor
and electronic is broken
a) Proof the plug connection at the
back of the electronic module
b) Send the instrument to the sup-
plier for repairs
Display: An error was discovered in the
electronics during the self test
Send the instrument to the supplier
for repairs
Display: Temperature sensor faulty Send the instrument to the supplier
for repairs
The rotary
knob is not
responding
Operator lockout Remove operator lockout
Instrument faulty Send the instrument to the supplier
for repairs
8 Maintenance 9 Declaration of Conformity
44
9 Declaration of Conformity 9 Declaration of Conformity
45
9 Declaration of Conformity 10 Type Examination Certificate
46
10 Type Examination Certificate 10 Type Examination Certificate
47
10 Type Examination Certificate 10 Type Examination Certificate
48
10 Type Examination Certificate 10 Type Examination Certificate
49
10 Type Examination Certificate
50
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