Issue: 69th July 2019

BA517E-SSRugged one inputGeneral Purpose

TachometerIssue 6

1. Description

2. Operation2.1 Initialisation2.2 Controls2.3 Displays

3. System Design3.1 Power supply3.2 Pulse input

3.2.1 Switch contact input3.2.2 Open Collector input3.2.3 2-wire proximity detector input3.2.4 Magnetic pick-off input3.2.4 Voltage pulse input

3.3 Remote reset

4. Installation4.1 Location4.2 Installation procedure4.3 EMC4.4 Tachometer earthing4.5 Scale card

5. Configuration and Calibration5.1 Calibration structure5.2 Accessing configuration functions5.3 Summary of configuration functions5.4 Input: inPut

5.5 Input type: inP . tYPE

5.6 Debounce: dEbouncE

5.7 Display update interval: uPdAtE

5.8 Run-time display: di5P-2

5.9 Position of the decimal points: dP

5.10 Speed scale factor: 5CALE . 5

5.11 Timebase: t-bA5E

5.12 Display filter: FiLtEr

5.13 Clip-off: CLP oFF

5.14 Local reset: LoC clr

5.15 Local run-time reset: clr tot

5.16 Local grand total run-time reset: clr gtot

5.17 Grand total run-time reset from within the configuration menu: Clr . Gtot

5.18 Security code: CodE

5.19 Reset configuration to factory defaults: r5Et def

6. Configuration example6.1 Configuration procedure

7. Maintenance7.1 Fault finding during commissioning7.2 Fault finding after commissioning7.3 Servicing7.4 Routine maintenance7.5 Guarantee7.6 Customer comments

8. Accessories8.1 Scale card8.2 Tag information8.3 Display backlight8.4 Alarms

8.4.1 Solid state output8.4.2 Configuration & adjustment8.4.3 Alarm enable: EnbL

8.4.4 Type of alarm: tYPE

8.4.5 Setpoint adjustment: 5P1x & 5P2x8.4.6 Alarm function: Hi . Lo

8.4.7 Alarm output status: no . nC

8.4.8 Hysteresis: H5tr

8.4.9 Alarm delay: dELA

8.4.10 Alarm silence time: 5IL

8.4.11 Flash display when alarm occurs: FL5H

8.4.12 Access Setpoint: AC5P

8.4.13 Adjusting alarm setpoints from display mode.

8.5 Pulse Output 8.5.1 System design

8.5.2 Configuration8.5.3 Access Pulse output sub-menu:

PuL5E . oP

8.5.4 Enable pulse output: EnbL

8.5.5 Source of output pulse: 5ourCE

8.5.6 Divide output pulse frequency:diVidE

8.5.7 Define output pulse width: durAtion

8.5.8 Pulse storage

8.6 4/20mA output8.6.1 System design8.6.2 Configuration & calibration8.6.3 Access 4/20mA output sub-menu:

4-20 oP

8.6.4 Display corresponding to 4mAoutput: 4 . 000

8.6.5 Display corresponding to 20mAoutput: 20 . 000

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CONTENTS

The BA517E-SS is CE marked to show compliance with the European EMC Directive 2014/30/EU

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1. DESCRIPTIONThis rugged general purpose, one input Tachometerhas a stainless steel enclosure and an impactresistant glass window. It is primarily intended formeasuring rotational speed within a process area. Toassist with routine maintenance, it also includes a run-time clock that records the number of hours that themonitored machinery has been operating.

This instruction manual supplements the abbreviatedinstruction sheet supplied with each instrument.

2. OPERATIONFig 1 shows a simplified block diagram of theBA517E-SS Tachometer. The instruments can acceptpulses from most types of sensor and display speedper second, minute or per hour, plus run-time in hourson a separate display.

The BA517E-SS has a single pair of input terminalsfor connection to all types of sensor. When connectedto a sensor requiring energising, such as a switchcontact, open collector or a two wire proximitydetector, an external link between terminals 3 and 4connects power to the sensor input terminals.

Factory fitted optional accessories are shown below:

Backlight

Isolated dual alarmsor

Isolated 4/20mA outputor

Isolated pulse output

Only one output option may be fitted

Fig 1 BA517E-SS

2.1 InitialisationEach time power is applied to a Tachometerinitialisation is performed. After a short delay thefollowing display sequence occurs:

All segments of the display are activated

Tachometer starts functioning, using theconfiguration information stored in theinstrument’s permanent memory. Unless therun-time display has been reset to zero, newelapsed time will be added to the existingrun-time total.

2.2 Controls The BA517E-SS is controlled and configured via fourfront panel push buttons. In the display mode i.e.when the instrument is displaying speed the pushbutton functions are:

Push Button Functions

& + * To reset run-time to zero press buttonssimultaneously for three seconds orlonger. This is a configurable function.See 5.15

) + * To reset grand total run-time to zeropress buttons simultaneously for tenseconds or longer. This is aconfigurable function.See 5.16

( + & Shows in succession, firmware versionnumber, instrument function tacho andany output accessories that is fitted:

- A Dual alarm outputs

- P Pulse output

- C 4/20mA output

( + ) Access to configuration menu

Note: When optional alarms are fitted, theTachometer may be configured to provide directaccess to the alarm setpoints from the display modewhen the ( + * buttons are operated.See 8.4.12 and 8.4.13

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2.3 DisplaysThe BA517E-SS has two digital displays andassociated annunciators, plus a pulse input indicatoras shown on front cover of this manual.

Speed On upper eight digit displaydisplay

Run-time On lower six digit display.display Shows time in hours, with a

resolution of 0.1 hours, thatmonitored machinery has beenoperating. May be turned off.See 5.8

Pulse input This disc in the lower left handindicator corner of the display 'rotates'

two seconds each time an inputpulse is received. Appears torotate continuously when inputfrequency exceeds 0.5Hz.

Hold Activated when input frequencyannunciator is below the clip-off threshold at

which the run-time timer stopsfunctioning.

Reset Activated while run-time displayannunciator is being reset to zero.

Grand total Activated while run-time grandannunciator total which is shown in hours is

being displayed.

RTx Retransmitted pulse annunciator annunciator.

Depends upon the setting of5ource in the pulse outputconfiguration menu.

5caled:

Annunciator activated eachtime pulse output open collectoris on, i.e. Ron is less than60Ω + 3V.

direct:

Annunciator continuously activated.

3. SYSTEM DESIGN Fig 2 illustrates the basic circuit that is used for allBA517E-SS installations. For simplicity, connectionsfor the optional pulse output, alarms and 4/20mAoutput are shown separately in section 8 thismanual.

Fig 2 Typical BA517E-SS system

3.1 Power supplyThe BA517E-SS Tachometer requires 10V to 28Vdc between terminal 1 & 2 and consumes:

Without backlight 10.0mA Addition with terminals 3 & 4 linked 6.0mA Addition for optional backlight 22.5mA _______ Total current 38.5mA

3.2 Pulse inputAs shown in Fig 2 the BA517E-SS can display thespeed and total run-time from sensors with a widevariety of pulse outputs.

The following table shows the Tachometer's inputswitching thresholds when conditioned for use withsensors having different outputs, For reliableoperation the Tachometer's pulse input must fallbelow the lower threshold and rise above the upperthreshold.

Input sensorSwitching thresholds

Lower Upper

Open collector 2k 10k

Voltage pulse low 1.0V 3.0V

Voltage pulse high 3.0V 10.0V

Magnetic pick-off 0mV 40mV peak

Proximity detector 1.2mA 2.1mA

Switch 100 1000

Sensors with a switch contact, proximity detector oran open collector output require energising which isachieved by linking terminals 3 and 4.

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3.2.1 Switch contact inputAny sensor with a mechanically or magneticallyactivated switch contact such as a reed relay may beconnected to the Tachometer. The BA517E-SScontains a configurable debounce circuit to preventcontact bounce being counted. See section 5.6.

3.2.2 Open collector inputSensors with an open collector output such as opticaldetectors may be directly connected to theTachometer input terminals 5 & 6. Polarity of thesensor should be observed. The BA517E-SScontains a configurable debounce circuit to preventfalse triggering. Three levels of de-bounce protectionare independently available. See section 5.6.

3.2.3 2-wire proximity detector inputMost sensors incorporating a NAMUR 2-wire proximitydetector may be directly connected to the inputterminals of the BA517E-SS providing the minimumoperating voltage of the proximity detector is less than7.5V. Polarity of the proximity detector should beobserved. The BA517E contains a configurabledebounce circuit to prevent false triggering. Threelevels of de-bounce protection are independentlyavailable. See section 5.6.

3.2.4 Magnetic pick-off inputSensors incorporating a magnetic pick-off to detectrotation will have a low level ac voltage output unlessthe sensor incorporates an amplifier. CoiL in theBA517E-SS input configuration menu is a low levelvoltage pulse input intended for use with an magneticpick-off. The BA517E-SS contains a configurabledebounce circuit to prevent false triggering. Threelevels of de-bounce protection are independentlyavailable. See section 5.6.

3.2.5 Voltage pulse inputTwo voltage pulse input ranges are selectable in theBA517E-SS Tachometer configuration menu, VoLt5 L

and VoLt5 H as shown in section 3.2

The Tachometer contain a configurable debouncecircuit to prevent false triggering of the instrument.Three levels of de-bounce protection are available.See section 5.6.

3.3 Remote resetThe BA517E-SS run-time display may be remotelyreset to zero by connecting terminals RS1 & RS2together for more than one second. Permanentinterconnection inhibits the run-time clock. Remoteresetting may be accomplished by any switch contact.

Note: The BA517E-SS can be configured to reset therun-time display to zero when the & and *push buttons are operated simultaneously formore than two seconds - see 5.15.

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4. INSTALLATION

4.1 LocationThe BA517E-SS has a stainless steel case with a10mm thick toughened glass window. The caseprovides 7J and the window 4J front of panel impactprotection. The captive silicone gasket, which sealsthe joint between the instrument and the panelenclosure, ensures IP66 front of panel ingressprotection. The rear of the Tachometer has IP20protection.

Fig 3 shows the overall dimensions of the BA517E-SStogether with the recommended panel enclosure cut-out dimensions. Figs 4 & 5 show the location of thefield wiring terminals.

4.2 Installation Procedure

a. Cut the aperture specified in Fig 3 in the panelenclosure. Ensure that the edges of aperture arede-burred.

b. Inspect the Tachometer's captive gasket andensure that it is not damaged before inserting theTachometer into the panel enclosure aperture.

c. If the enclosure panel is less than 1.0mm thick, oris non-metallic, an optional BEKA stainless steelsupport plate should be slid over the rear of theTachometer before the panel clamps are fitted toevenly distribute the clamping force and preventthe enclosure panel being distorted or creeping.

d. Slide a panel clamp into the two grooves at eachcorner of the indicator housing with the M3 studprotruding through the hole at the rear of theclamp. Fit the stainless steel spring washer overthe stud and secure with the stainless steel wingnut.

e. Evenly tighten the four clamps to secure theinstrument. The recommended minimumtightening torque for each wing nut is 22cNm (1.95lbf in).

f. Connect the panel enclosure wiring to the rearterminal blocks. To simplify installation, theterminals are removable so that wiring can becompleted before the instrument is installed.Cables should be mechanically secured to ensureterminals are not damaged by vibration.

g. Finally fit a silicone rubber push-on cap to the endof each M3 threaded rod.

Support panel wiring to prevent vibration damage

Note: Optional backlight is internally powered

Fig 3 Dimensions and terminals

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Fig 4 Installation procedure

4.3 EMCThe BA517E-SS complies with the requirements ofthe European EMC Directive 2014/30/EU. Forspecified immunity all wiring should be in screenedtwisted pairs, with the screens earthed at one point.

Fig 5 Terminals for field wiring

4.4 Tachometer earthingThe BA517E-SS has an M4 earth stud on the rearpanel which should be electrically connected to thepanel enclosure in which the Tachometer is mounted,or to the plant equipotential conductor.

4.5 Scale cardThe Tachometer’s units of measurement are shownon a printed scale card in a window at the right handside of the display. The scale card is mounted on aflexible strip that is inserted into a slot at the rear ofthe instrument as shown in Fig 6. Thus the scalecard can easily be changed without removing theTachometer from the panel or opening theinstrument enclosure.

New Tachometers are supplied with a printed scalecard showing the requested units of measurement, ifthis information is not supplied when the instrumentis ordered a blank card will be fitted.

A pack of self-adhesive scale cards printed withcommon units of measurement is available as anaccessory from BEKA associates. Custom printedscale cards can also be supplied.

To change a scale card, unclip the tapered end ofthe flexible strip at the rear of the instrument bygently pushing it upwards and pulling it out of theenclosure. Peel the existing scale card from theflexible strip and replace it with a new printed card,which should be aligned as shown below. Do not fita new scale card on top of an existing card.

Install the new scale card by gently pushing theflexible strip into the slot at the rear of theTachometer, when it reaches the internal end-stopsecure it by pushing the end of the flexible stripdownwards so that the tapered section is held by therear panel.

Align the self-adhesiveprinted scale card onto theflexible strip and insert thestrip into the indicator asshown below.

Fig 6 Inserting flexible strip carrying scale card intoslot at the rear of the Tachometer.

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5.0 CONFIGURATION & CALIBRATIONThe BA517E-SS Tachometer is configured andcalibrated via four front panel push buttons. All theconfiguration functions are contained in an easy touse intuitive menu that is shown diagrammatically inFig 8.

Each menu function is summarised in section 5.3 ofthis manual and each summary includes a referenceto more detailed information.

When factory fitted optional alarms, pulse output or4/20mA output are included, additional functionsappear in the configuration menu, which are describedseparately in section 8.

All new Tachometer are supplied calibrated asrequested at the time of ordering. If calibration is notrequested, the Tachometer will have defaultconfiguration as shown in the following table, but caneasily be re-configured on-site.

Function Display DefaultInput inP . tYPE oP . CoL

Debounce dEbounCE dEFAuLt

Update uPdAtE 0 . 5

Run-time display di5P-2 on

Decimal point (speed) dP 0000 . 0

Speed scale factor 5CALE . 5 001 . 00

Timebase t-bA5E tb-60

Filter FiLter 24

Clip-off CLP-oFF 0000 . 0

Local run-time reset clr tot oFF

Local grand total run-time reset. Clr gtot oFF

Security code CodE 0000

5.1 Calibration structureFig 7 shows the BA517E-SS calibration structure.The pulse input is divided by 5CALE.5 to provide therequired Tachometer speed display in engineeringunits. e.g. if a sensor monitoring a rotating shaftgenerates 18 pulses per revolution, to produce adisplay in revolutions 5CALE.5 should be set to 18.0.

The timebase t-bA5E is a multiplying factor thatdetermines whether the Tachometer displays speedper second, per minute or per hour.

The Tachometer incorporates a run-time counter thatdisplays the time in hours that the speed of themonitored machinery has been equal to or greaterthan the Clip-off value.

Fig 7 Calibration structure

5.2 Accessing configuration functionsThroughout this manual push buttons are shown as&, *, ( and ). Legends displayed by theinstrument are shown in a seven segment font asthey appear on the Tachometers e.g. inPut anduPdAtE.

Access to the configuration menu is obtained byoperating the ( + ) push buttons simultaneously.If the instrument is not protected by a security codethe first parameter inPut will be displayed. If asecurity code other than the default code 0000 hasalready been entered, the instrument will displayCodE. Press ( to clear this prompt and enter thesecurity code for the instrument using the & or *push button to adjust the flashing digit, and the (push button to transfer control to the next digit. Ifthe correct code has been entered pressing ) willcause the first parameter inPut to be displayed. Ifan incorrect code is entered, or a push button is notoperated within ten seconds, the instrument willautomatically return to the display mode.

All configuration functions and prompts are shownon the upper eight digit display.

Once within the configuration menu the requiredparameter can be selected by scrolling through themenu using the & or * push buttons. Theconfiguration menu is shown diagrammatically inFig 8.

When returning to the display mode followingreconfiguration, the Tachometer will display dAtA

followed by 5AVE while the new information is storedin permanent memory.

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5.3 Summary of configuration functionsThis section summarises all the configurationfunctions. When read in conjunction with Fig 8 itprovides a quick aid for configuring the Tachometer.If more detail is required, each section contains areference to a full description of the function.

Display Summary of function

inPut Input Contains sub-menu with two functions:

inP . tYPE Select Input type dEbounCE Set debounce

See section 5.4

inP . tYPE

Configures the Tachometer toaccept one of six types of input: oP . CoL Open collector * VoLt5 L Voltage pulse <1 >3V VoLt5 H Voltage pulse <3 >10V CoiL Magnetic pick-off Pr . dEt Proximity detector * ContACt Switch contact *

* Link terminals 3 & 4See section 5.5

dEbounCE

Defines level of input debounceapplied to the pulse input to preventfalse counting, three levels areselectable:

dEFAuLt

heavy

LiGHt

See section 5.6

uPdAtE Display update intervalDefines the interval between displayupdates from 0.5 to 5 seconds. See section 5.7

di5P-2 Run-time displayTurns the lower display, which showsrun-time in hours, on or oFF.See section 5.8

Display Summary of function

dP Decimal pointsDefines the position of the decimalpoint in the Tachometer speeddisplay.See section 5.9

5CALE . 5 Speed scale factor5CALE.5 is a dividing factor,adjustable between 0.0001 and99999, that converts the pulse inputinto the required Tachometer speeddisplay.. e.g. If a sensor monitoringa rotating shaft generates 18 pulsesper revolution, to produce aTachometer speed display inrevolutions 5CALE.5 should be set to18.0.See section 5.10

t-bA5E TimebaseSelectable multiplier allowingTachometer speed display to be inunits per second, per minute or perhour.Select:

tb-01 per secondtb-60 per minute

tb-3600 per hourSee section 5.11

FiLtEr Display filterAdjustable digital filter that reducesthe noise on the Tachometer speeddisplay, comprising two parameterseach adjustable between 0 and 9.The first digit defines the amount offiltering applied to the display, thesecond the deviation from thedisplayed value at which the filterwill be overridden and theTachometer display will moverapidly to the new value. See section 5.12

CLP-oFF Clip-offClip-off is the Tachometer speeddisplay threshold below which therun-time clock is inhibited.See section 5.13

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Display Summary of function

LoC clr Local resetContains sub-menu with twofunctions enabling the run-timedisplay and grand total run-time to bereset to zero via the front panel pushbuttons when the Tachometer is in thedisplay mode.See section 5.14

clr tot

When ‘on’ is selected, operatingthe & and * buttonssimultaneously for more than threeseconds in the display moderesets the run-time display to zero.See section 5.15

clr gtot

When on is selected, operating the) and * buttons simultaneouslyfor more than 10 seconds in thedisplay mode resets the run-timegrand total to zero.See section 5.16

Display Summary of function

CLr Gtot Resets grand total run-time tozero.This function resets the grand totalrun-time to zero from within theconfiguration menu when CLr YE5 isselected, and 5urE is entered toconfirm the instruction.Note: Once reset, the original grandtotal can not be recovered.See section 5.17

CodE Security codeDefines a four digit alphanumericcode that must be entered to gainaccess to the configuration menu.Default code 0000 disables thesecurity function and allowsunrestricted access to allconfiguration functions.See section 5.18

r5Et def Reset to factory defaultsReturns the Tachometer to thefactory defaults shown in section 6.0To prevent accidental use therequest must be confirmed byentering 5urE before the reset willbe executed.See section 5.19

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5.4 Input: inPut

The Input function contains two sub-functionsinP . tYPE and dEbounCE which configure theTachometer input and define the amount of inputnoise rejection.

5.5 Input type: inP . tYPE

inP . tYPE is a sub-menu in the inPut function whichdefines the type of input sensor or input pulse withwhich the Tachometer will function. To check orchange the type of input, select inPut in the mainconfiguration menu and press ( which will reveal theinP . tYPE prompt, pressing ( again will show thepresent type of input. If set as required press )twice to return to the configuration menu, orrepeatedly press the & or * button until therequired type of input is displayed and then press )twice to return to the configuration menu.

One of following six types of input may be selected:

Switching thresholds Low High

oP . CoL Open collector 2 2 10kΩVoLt5L Voltage pulse low 1 1 3VVoLt5H Voltage pulse high1 3 10VCoiL Magnetic pick-off 0 40mVPr . dEt Proximity detector 2 1.2 2.1mAContACt Switch contact 2 100 1000Ω

Notes:

1 Maximum voltage input +28V.

2 For sensors that require energising i.e.proximity detectors, switch contacts andopen collectors, terminals 3 & 4 of theTachometer should be linked together.

3 To count correctly, the input pulse must fallbelow the lower switching threshold and riseabove the higher switching threshold.

4 See section 5.6 for maximum operating frequency.

5.6 Debounce: dEbouncE

dEbouncE is an adjustable sub-menu in the inPut

function which prevents the Tachometer miscountingwhen the input pulse has noisy edges, such as thoseresulting from a mechanical contact closing andbouncing. Three levels of protection may beselected and the amount of debounce applieddepends upon the type of Tachometer input that hasbeen selected in the inP . tYPE function.

The following table shows the minimum time that theinput pulse must be continuously above the upperinput switching threshold and continuously below thelower switching threshold to ensure that theTachometer processes the input pulse. Inputswitching thresholds are shown in section 5.5.

De-bouncelevel

Min input pulse width

Type of Input

Contact All others

Default 1600µs 40µs

Heavy 3200µs 350µs

Light 400µs 5µs

The Tachometer’s maximum counting frequencydepends upon the debounce level selected, theshape of the input pulse and its amplitude. Thefollowing table assumes a square wave input and isonly for guidance. The maximum operatingfrequency will be lower if the input pulses havesloping edges and the pulse amplitude only slightlyexceeds the input switching thresholds.

ONLY FOR GUIDANCE

Debouncelevel

Max counting frequency

Type of input

Contact All others

Default 250Hz 12kHz

Heavy 120Hz 2kHz

Light 1000Hz 100kHz

The minimum operating input frequency is 0.01Hz. Belowthis frequency the speed display will be forced to zero.

The dEbouncE function is a sub-menu located in theinPut function. Select inPut in the configurationmenu and press ( which will reveal the inP . tYPE

prompt, press the & or * button to selectdEbouncE followed by ( to reveal the existingsetting. Pressing the & or * button will scrollthrough the three levels. When the required levelhas been selected, pressing ) twice will enter theselection and return the display to the inPut promptin the configuration menu.

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5.7 Display update interval: uPdAtE

If the Tachometer display is likely to change rapidly, alonger interval between display updates may simplifyreading the display. This function allows one of sixdifferent display intervals between 0.5 and 5 secondsto be selected. The selected display update intervaldoes not affect the update time of any otherinstrument function.

To adjust the update interval select uPdAtE from theconfiguration menu and press ( to reveal the currenttime. Pressing the & or * button will scroll throughthe six times. When the required interval has beenselected press ) to enter the selection and return tothe configuration menu.

5.8 Run-time display: di5P-2

This function turns the run-time display on or off,although the run-time timer continues to function whenthe display is off.

To check the status of the run-time display, selectdi5P-2 from the configuration menu and press( that will reveal if the run-time display is on or oFF.The setting may be changed by pressing the & or *button followed by the ) button to enter the selectionand return to the configuration menu.

5.9 Position of the decimal points: dP

This function positions the decimal point in theTachometer speed display. To adjust select dP fromthe configuration menu and press (. TheTachometer display will be activated and identified bythe display annunciator as RATE. The decimal point,which may be positioned between any of the digits ormay be absent is positioned by operating the & or* push button. When set as required enter thesetting and return to the configuration menu byoperating the ) button.

5.10 Speed scale factor: 5CALE . 5

5CALE.5 is a dividing factor adjustable between 0.0001and 99999 that enables the Tachometer speeddisplay to be in the required engineering units. e.g. Ifa sensor monitoring a rotating shaft generates 18pulses per revolution, to produce a Tachometer speeddisplay in revolutions 5CALE.5 should be set to 18.0.

The units of the Tachometer speed display are pulsesper unit of time. The unit of time is the timebase ofthe instrument which is determined by t-bA5E which isdescribed in section 5.11.

To check or change the speed scale factor select5CALE . 5 from the configuration menu and press (which will reveal the existing value with one digitflashing. The value of the flashing digit may bechanged by pressing the & or * button.

When this digit has been adjusted as required,pressing ( will transfer control to the next digit.When all the digits have been adjusted pressing( will transfer control to the decimal point whichmay be positioned between any of the digits, or maybe omitted by moving it to the right of the leastsignificant digit. When the required speed scalefactor has been entered, press ) to return to the5CALE . 5 prompt in the configuration menu.

5.11 Timebase: t-bA5E

The timebase multiplies the Tachometer speeddisplay by 1, 60 or 3,600 depending upon whetherthe Tachometer is required to display speed persecond, per minute or per hour. e.g. RPS, RPM orRPH. See Fig 12.

To check or change the timebase, select t-bA5E

from the configuration menu and press ( which willreveal the current setting. Pressing the & or *button will scroll through the three options:

tb-1 speed per secondtb-60 speed per minute

tb-3600 speed per hour

When the required multiplier is displayed press )to return to the t-bA5E prompt in the configurationmenu.

5.12 Display filter: FiLtEr

The digital display filter has two independentadjustable parameters enabling the Tachometerspeed display response to be tailored for optimumperformance. The filter parameters are controlled bya two digit number. The first digit defines theamount of filtering applied to the display as shownbelow.

First digit Filter time constantseconds

0X 01X 1.32X 4.33X 6.54X 8.75X 11.36X 15.77X 20.98X 25.29X 31.5

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The second digit defines the deviation from thedisplayed speed at which the filtering defined by thefirst digit will be overridden and the Tachometer speeddisplay will move rapidly to the new value.

Seconddigit

Magnitude of inputstep change which

will override the filterand move the speeddisplay rapidly to the

new value..X0 OffX1 1%X2 2%X3 4%X4 8%X5 12%X6 16%X7 24%X8 32%X9 64%

By careful adjustment of the two parameters a stabledisplay with an acceptable input step response can beobtained for most applications.

During commissioning it is recommended that initiallythe second digit is set to 0 (off) and the first digit isadjusted to provide an acceptable Tachometer displaystability. The second digit should then be increaseduntil the selected step size is greater than the noiseon the display, at which setting the Tachometer speeddisplay will become stable. These will be the optimumfilter parameters for acceptable Tachometer speeddisplay stability and a fast response to a large speedchange of the monitored machinery.

To check or change the filter select FiLtEr in theconfiguration menu and press ( which will reveal thecurrent settings with the first digit flashing. Pressingthe & or * button will change the flashing digit and( will transfer control to the second digit. Whilemaking adjustments the filtered Tachometer display isshown on the lower display in place of run-time so thatstability can be assessed while adjustments are beingmade. When set as required, press the ) button toenter the revised parameters and return to the FiLtEr

prompt in the configuration menu.

5.13 Clip-off: CLP oFF

Clip-off determines the displayed speed at which therun-time counter starts to function, below thisthreshold the run-time counter does not function. Ifthe run-time counter is required to operate wheneverthe Tachometer is powered, clip-off should be set tozero.

If the run-time display is not being used it is notnecessary to enter a clip-off value - see 5.8.

To check or change the clip-off threshold selectCLP oFF from the configuration menu and press( which will reveal the current setting. Thethreshold is shown in the units already selected forthe Tachometer speed display with one digitflashing. The value of the flashing digit may beadjusted by pressing the & or * button, when setas required pressing ( will transfer control to thenext digit. When all the digits have been adjusted,press the ) button to enter the revised thresholdand return to the CLP oFF prompt in the configurationmenu.

When the Tachometer speed display falls below theclip-off threshold, the HOLD annunciator will beactivated and the run-time clock will be stopped.

Note:To avoid confusion, when the speed scalefactor 5CALE . 5, timebase t-bA5E, or theposition of the speed display decimal point dp

are changed, clip-off will automatically bereset to zero. A new clip-off threshold mustbe entered after any of these changes havebeen made.

5.14 Local reset: LoC clr

The Local reset function contains two sub-functionsclr tot and clr gtot which when enabled allow therun-time display and grand total run-time to be resetto zero via the instrument push buttons while theTachometer is in the display mode.

5.15 Local run-time reset: clr tot

clr tot is a sub-menu in the LoC clr functionwhich when activated allows an operator to reset therun-time display to zero while the Tachometer is inthe display mode by operating the & and * pushbuttons simultaneously for more than three seconds.

Select LoC clr in the configuration menu and press( which will reveal the clr tot prompt, operate (again to show if the local run-time reset is on or oFF.If set as required operate the ) button twice toreturn to the configuration menu, or the & or *button to change the setting followed by the )button twice to enter the change and return to theLoC clr prompt in the configuration menu.

Note:The run-time display may also be reset to zeroremotely by connecting terminals RS1 andRS2 together for more than one second. Seesection 3.3.

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5.16 Local grand total run-time reset: clr gtot

The grand total run-time is a separate timer thatfunctions in parallel with the run-time display, but isnot zeroed when the run-time display is reset to zero.The run-time grand total may be viewed in the displaymode by pressing the ) and * buttonssimultaneously.

Clr gtot is a sub-menu in the LoC clr functionwhich when activated allows an operator to reset thegrand total run-time to zero while the Tachometer is inthe display mode by operating the ) and * pushbuttons simultaneously for more than ten seconds.See section 2.2

To check or change the function select LoC clr in theconfiguration menu and press ( which will reveal theclr tot prompt. Using the & or * button selectclr gtot and press ( which will show if the localgrand total reset is on or oFF. If set as requiredoperate the ) button twice to return to theconfiguration menu, or the & or * button to changethe setting followed by the ) button twice to enterthe change and return to the LoC clr prompt in theconfiguration menu.

Note: Once reset, the grand total run-time can not berecovered.

5.17 Grand total run-time reset from within the configuration menu: Clr Gtot

The grand total run-time is a separate timer that isincremented in parallel with the run-time display, but isnot zeroed when the run-time display is reset to zero.The grand total may be viewed in the display mode bypressing the ) and * buttons simultaneously.

The grand total can be reset to zero from within theconfiguration menu using this Clr Gtot function.

To zero the grand total from within the configurationmenu select Clr Gtot and press ( which will causethe instrument to display Clr . no with no flashing.Press the & or * push button until Clr . YE5 isdisplayed and then press ( which will result in a0000 prompt being displayed with the first digitflashing. This is a request for the instruction to beconfirmed by entering 5urE using the & or * buttonto adjust the flashing digit and the ( button to movecontrol to the next digit. Pressing ) will then resetthe grand total to zero and return the Tachometer tothe configuration menu. Note:

Once reset, the grand total can not be recovered.

5.18 Security code: CodE

Access to the instrument’s configuration menu maybe protected by a four digit security code which mustbe entered to gain access. New instruments areconfigured with the default security code 0000 whichallows unrestricted access to all configurationfunctions.

To enter a new security code select CodE from theconfiguration menu and press ( which will causethe Tachometer to display 0000 with one digitflashing. The flashing digit may be adjusted usingthe & or * push button and the ( button totransfer control to the next digit. When all the digitshave been adjusted press ) to return to the CodE

prompt. The revised security code will be activatedwhen the Tachometer is returned to the displaymode.

Please contact BEKA associates sales department ifthe security code is lost.

5.19 Reset configuration to factory defaults:r5Et Def

r5Et Def resets the Tachometer configuration to thefactory default configurations shown in sections 5.0.

To reset the Tachometer to the factory defaultconfigurations select r5Et def from the configurationmenu and press ( which will result in theinstrument displaying 0000 with the first digitflashing. To confirm the instruction 5urE should beentered. Using the & or * button set the firstflashing digit to 5 and press ( which will transfercontrol to the second digit which should be set to u.When 5urE has been entered pressing the )button will reset all the configuration functions andreturn the instrument to the display mode.

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6. CONFIGURATION EXAMPLEIn this example a BA517E-SS Tachometer isconnected to a proximity detector producing 105pulses per revolution.

The BA517E-SS is required to display rotationalspeed in RPM with a resolution of one RPM. The run-time clock is to operate when the shaft speedexceeds 5 RPM. The display is to be updated twiceper second.

For this application the operator needs to reset therun-time display to zero from the display mode, butshould not be able to reset the grand total run-timefrom the display mode. To prevent tampering theinstrument configuration menu is to be protected bysecurity code of 1209.

6.1 Configuration procedureThe BA517E-SS Tachometer may be configured on-site without disconnection from the power supply orfrom the proximity detector.

Step 1 Enter the configuration menuEnter the configuration menu bysimultaneously pressing ( and ).Assuming a security code has not alreadybeen entered the instrument will respondby displaying inPut which is the firstfunction in the configuration menu. SeeFig 8.

Step 2 Select the type of input & debounceWith inPut displayed press ( which willreveal the sub-menu. Using the & or *button select inP . tYPE and press ( toreveal the current input. The Tachometeris required to work with a proximitydetector so again using the & or *button select Pr. dEt followed by ) toreturn to the inP . tYPE prompt in the sub-menu.Using the & or * button selectdEbouncE from the sub-menu and press(. Using the & or * button selectdEFAuLt which will provide moderate pulseedge noise protection. If the Tachometeris subsequently found to miscount thenoise rejection can be increased. Enterthe selection and return to the inPut

prompt in the configuration menu bypressing the ) button twice.See 5.4, 5.5 and 5.6

Step 3 Select the interval between displayupdatesUsing the & or * button select uPdAtE

in the configuration menu and press ( toreveal how frequently the Tachometerdisplay is updated.

Using the & or * push button select0 . 5 (0.5 seconds i.e. 2 display updatesper second). Enter the selection andreturn to the uPdAtE prompt in theconfiguration menu by pressing the )button.See 5.7

Step 4 Run-time display Using the & or * button select di5P-2

in the configuration menu and press (to select if the run-time display is on oroFF. The Tachometer is required todisplay run-time therefore using the &or * button select on and press ) toenter the selection and return to thedi5P-2 prompt in the configuration menu.See 5.8

Step 5 Position of decimal point in speeddisplay.Select dP from the configuration menuand press (. The speed display will beactivated and identified by the Rateannunciator. Using the & or * pushbutton position the decimal point to theright of the least significant digit to give atotal display resolution of 1.Finally press the ) button to enter theselection and return to the dP prompt inthe configuration menu.See 5.9

Step 6 Enter the speed scale factor5CALE.5 is a dividing factor adjustablebetween 0.0001 and 99999 that enablesthe Tachometer to display speed in therequired engineering units. The speeddisplay timebase is determined byt-bA5E that is adjusted in Step 7.

In this example the Tachometer speeddisplay is required in revolutions perminute. The proximity detector produces105 pulses per revolution therefore5CALE . 5 should therefore be adjusted to105.0.

Using the & or * push button select5CALE.5 from the configuration menu andpress ( to reveal the existing value withone digit flashing. This should bechanged to 105.0 using the & or *push button to adjust the flashing digitand the ( button to transfer control tothe next digit and to position the decimalpoint. Finally, enter the new value andreturn to the 5CALE . 5 prompt in theconfiguration menu by pressing ).See 5.10

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Step 7 Enter the speed timebaseThe speed timebase determines if theTachometer displays speed per second,per minute or per hour. In this examplerevolutions per minute are required.Using the & or * push button selectt-bA5E from the configuration menu andpress (. Again using the & or * pushbutton select tb-60 from the three optionswhich will multiply the speed display by 60.Enter the selection and return to thet-bA5E prompt in the configuration menuby pressing ).See 5.11

Step 8 Adjust the display filterThe digital display filter has twoindependent adjustable parametersenabling the rate display response to betailored for optimum performance. Thefilter parameters are controlled by a twodigit number. The first digit defines theamount of filtering applied to the display,for initial configuration it is recommended itis set to 2 which is a time constant of 4.3seconds.The second digit defines the deviation fromthe displayed speed at which the filtering,defined by the first digit, will be overriddenand the Tachometer speed display willmove rapidly to the new value. It isrecommended that the second digit isinitially set to 0.

After configuration both parameters mayrequire further adjustment to provide astable display with an acceptable stepresponse.

To allow the effect of filter changes to beseen immediately, the live speed display isshown on the lower display in place of run-time while the filter parameters are shownand being adjusted on the upper display.

Using the & or * push button selectFiLtEr from the configuration menu andpress (. The first digit, which controlsthe filter time constant, will be flashing andshould be set to 2 using the & or * pushbuttons. The ( button will transfer controlto the second digit, which controls the stepresponse and should be set to 0 in thesame way. Finally, enter the selection andreturn to the FiLtEr prompt in theconfiguration menu by pressing ).See 5.12

Step 9 Define clip-offIn this example the run-time clock isrequired to operate when the displayspeed equals or exceeds 5 RPM. Theclip-off threshold should therefore be setto 5.

Using the & or * push button selectClp oFF from the configuration menu.Press ( which will reveal the currentclip-off threshold in RPM i.e. the sameunits already selected for the speeddisplay. Adjust the display to 00005 usingthe & or * push buttons to adjust theflashing digit and the ( button totransfer control to the next digit. Finally,enter the new clip-off threshold andreturn to the CLp-oFF prompt in theconfiguration menu by pressing ).See 5.13

Step 13 Local reset of total and grand totalTwo separate functions in the LoC clr

sub-menu may be individually activatedto allow the operator to reset the run-timedisplay and grand total run-time from thedisplay mode without entering theconfiguration menu.

In this example the operator is requiredto reset the run-time display but not thegrand total run-time when theBA517E-SS Tachometer is in the displaymode.Using the & or * button select LoC clr

in the configuration menu and press (which will reveal the sub-menu. Againusing the & or * button select the localtotal reset function clr tot and press (.This is required therefore using the & or* button select on followed by ) toreturn to the clr tot prompt in the sub-menu.

Using the & or * button select thelocal grand total run-time reset functionclr gtot and press (. This is notrequired therefore using the & or *button select oFF. Enter the selectionand return to the Loc clr prompt inthe configuration menu by pressing the) button twice.See 5.15 and 5.16

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Step 14 Reset the grand total to zeroBefore completing configuration the run-time grand total should be reset to zero.Using the & or * button select Clr . Gtot

in the configuration menu and press (which will cause Clr . no to be displayed.Again using the & or * button selectCLr YE5 and press ( which will result in a0000 display with one digit flashing. This isa request for the instruction to beconfirmed by entering 5urE using the& or * buttons to set each digit and the( button to move control to the next digit.Pressing ) will then reset the run-timegrand total to zero and return theinstrument to the Clr . Gtot prompt in theconfiguration menu.See 5.17.

Step 15 Define the security codeDefining a security code preventsunauthorised access to the configurationmenu. Using the & or * button selectCodE from the configuration menu andpress ( which will reveal 0000 with thefirst digit flashing. This example requiresthe security code to be 1209, using the &or * button set the flashing digit to 1 andpress ( to transfer control to the seconddigit. When all have been entered press) to return to the main configurationmenu. See 5.18.

Step 16 Return to the display modeConfiguration of the BA517E-SS is nowcomplete. Pressing the ) button willsave the new configuration and return theTachometer to the display mode. TheBA517E-SS will display dAtA followed by5AVE while the new information is storedin permanent memory, which will beprotected from unauthorised adjustmentby the security code.

To obtain a stable display it may benecessary to adjust the two filterparameters and the level of debounceduring commissioning of the Tachometer.

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7. MAINTENANCE

7.1 Fault finding during commissioningIf a BA517E-SS fails to function during commissioningthe following procedure should be followed:

Symptom Cause Check:No display No power supply,

or incorrect wiring.Note: Terminals 2,

6 & RS2 areinterconnected

within theinstrument.

That there isbetween 10 and

28V on terminals 1& 2 with terminal 1

positive.

Tachometer isreceiving power but

pulse inputindicator not

rotating

No input pulses,incorrect inputconfiguration,

incorrect linking ofterminals 3 & 4.

Input configuration.

Linking ofterminals 3 & 4.

That input signalpolarity is correct.

Pulse inputindicator rotating,

but incorrect speeddisplay

Incorrect speeddisplay calibration.

5CALE . 5

t-bA5E

Pulse inputindicator rotating

but missing orincorrect

run-time display.

Run-time display isnot activated.

Tachometer speeddisplay is less than

clip-off value.

Remote resetswitch contacts

closed.

di5P-2 is activatedSee 5.8

If HOLDannunciator isactivated, enter

smaller Clip-off

value. See 5.13

That ‘RESET’annunciator is notactivated. If it is,

check reset wiringand switch.

UnstableTachometer

display.

Noisy pulse inputsignal.

Eliminate source ofelectrical noise.

Increase debounceand/or display filter.

See 5.12Unable to enter

configurationmenu.

Incorrect securitycode.

That the correctsecurity code is

being used.See 5.18

Contact BEKA ifcode is lost.

Clip-off does notfunction.

Clip-off hasautomatically been

reset to zerofollowing

calibration change.

Reconfigure clip-off.See 5.13

Alarms do notfunction.

Alarms have beendisabled followingcalibration change.

Re-enable bothalarms.

See 8.4.3

8.2 Fault finding after commissioning

ENSURE PLANT SAFETY BEFORESTARTING MAINTENANCE

If a BA517E-SS Tachometer fails after it has beenfunctioning correctly, the following table may help toidentify the cause of the failure.

Symptom Cause Check:No display No power supply. That there is

between 10 and28V on terminals

1 & 2.Pulse inputindicator not

rotating.

No input pulses. Output fromsensor.

Wiring betweensensor and

Tachometer.Pulse input

indicator rotating,run-time displaynot functioning.

HOLD annunciatoractivated.

Input below clip-off threshold.

Adjust Clip-off

threshold.

Unstable ratedisplay

Noisy pulse inputsignal

Locate source ofelectrical noise, or

increasedebounce and

rate display filter.

If this procedure does not reveal the cause of thefault, it is recommended that the instrument isreplaced.

8.3 ServicingWe recommend that faulty BA517E-SSTachometers are returned to BEKA associates or toour local agent for repair.

8.4 Routine maintenanceThe mechanical and electrical condition of theinstrument should be regularly checked. Initiallyannual inspections are recommended, but theinspection frequency should be adjusted to suit theenvironmental conditions.

8.5 GuaranteeInstruments which fail within the guarantee periodshould be returned to BEKA associates or our localagent. It is helpful if a brief description of the faultsymptoms is provided.

8.6 Customer commentsBEKA associates is always pleased to receivecomments from customers about our products andservices. All communications are acknowledgedand whenever possible, suggestions areimplemented.

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8. ACCESSORIESAccessories for the BA517E-SS Tachometer areshown below, all except the scale card are factoryfitted and should be specified when the instrument isordered:

Scale card

Tag number

Backlight 1

Isolated pulse output 2

orIsolated 4/20mA output 2

orIsolated dual alarms 2

Notes:1. Internally powered

2. Only one of the three output options can befitted to a BA517E-SS Tachometer.

8.1 Scale cardThe BA517E-SS has a window on the right hand sideof the display through which to view a scale cardshowing the units of measurement such as RPM.New Tachometers are fitted with a scale card showingthe units of measurement specified when theinstrument was ordered, if the units are not specified ablank scale card will be fitted. A pack of scale cardspre-printed with common units of measurement isavailable as an accessory. These can easily be fittedon-site to the Tachometer without opening theinstrument enclosure or removing it from the panel,See section 4.5 and Fig 6.

Custom scale cards for applications requiring lesscommon units of measurement are also available.

8.2 Tag informationThe BA517E-SS can be supplied with a tag number orapplication information laser etched onto the rearpanel adjacent to the terminals. This information isnot visible from the front of the instrument afterinstallation.

8.3 Display backlightThe BA517E-SS Tachometer can be supplied with afactory fitted backlight that produce greenillumination enhancing display contrast and enablingthe display to be read at night and in poor lightngconditions. The optional backlight is internallypowered from the instrument power supply so thatno additional wiring is required, but the supplycurrent increases as shown below: Without backlight 10.0mA Addition for backlight 22.5mA Addition with terminals 3 & 4 linked 6.0mA _______ Total current 38.5mA

8.4 AlarmsThe BA517E-SS can be factory fitted with dualisolated solid state single pole alarm outputs thatmay be independently configured.

Each may be configured as a speed or run-timealarm with a high or low function having a normallyopen or closed output. An alarm delay and alarmsilence time can be included and hysteresis may beapplied to speed alarms.

CAUTIONThese alarm outputs should not be usedfor critical safety applications such as ashut down system.

When the BA517E-SS power supply is turned off ordisconnected, alarm outputs will open irrespective ofwhether normally open or normally closed outputshave been selected. When designing a system anopen output should therefore be chosen for thealarm condition. Alarm annunciators on theinstrument display indicate the status of each alarm.If an alarm delay or silence time has been selectedthe annunciator will flash during the delay or silenceperiod.

The BA517E-SS internal counters are up-dated andcompared with the alarm setpoint twice per second,irrespective of the display update time selected.This may result in an alarm being delayed for up tohalf a second after speed or run-time has exceededthe alarm setpoint.

8.4.1 Solid state output Each alarm has a galvanically isolated single polesolid state switch output as shown in Fig 9. Theoutputs are polarised and current will only flow inone direction. Terminals A1 and A3 should beconnected to the positive side of the supply.

Ron = less than 5 + 0.7VRoff = greater than 1M

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Note: Because of the series protection diode sometest meters may not detect a closed alarmoutput

Fig 9 Equivalent circuit of each alarm output

The solid state output of each alarm may be used toswitch any circuit with parameters equal or less than:

V = 30VI = 200mA

Fig 10 Typical alarm application

8.4.2 Configuration and adjustmentWhen a BA517E-SS is supplied with alarms theconfiguration menu is extended as shown in Fig 11which for simplicity only shows alarm AL1 configuredto operate as a speed alarm. The run-time optionsare identical except that a run-time alarm can nothave hysteresis. Alarm AL2 functions are identicalto alarm AL1.

The following table summarises each of the alarmconfiguration functions and includes a crossreferences to more detailed information. Again onlythe functions on alarm AL1 are listed.

Display Summary of function

EnbL Alarm enableEnables or disables the alarm withoutchanging the alarm parameters.See section 8.4.3

tYPE Type of alarmDefines whether the alarm operates onthe speed or run-time display. See section 8.4.4

5P1.5peed Alarm setpoint 1 or Adjusts the alarm setpoint. The

5P1.Hour5salarm is activated when the speed orrun-time display equals the setpoint.Note: 5P15 is displayed for a speedalarm and 5P1H for a run-time alarm.See section 8.4.5

HI . LO Alarm functionDefines whether the alarm has a high orlow function.See section 8.4.6

no . nc Normally open or normally closedoutput.Determines whether the single polealarm output is open or closed in thenon-alarm condition.See section 8.4.7

H5tr HysteresisAdjusts the alarm hysteresis. Onlyavailable on a speed alarm.See section 8.4.8

dELA Alarm delay timeAdjusts the delay between the displayequalling the setpoint and the alarmoutput being activated. See section 8.4.9

5IL Alarm silence timeDefines the time that the alarm outputremains in the non-alarm conditionfollowing acceptance of an alarm.See section 8.4.10

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Display Summary of function

FL5H Flash display when alarm occursWhen enabled, alternates the speed orrun-time display between the value andalarm reference Al1 or Al2 when an alarmoutput is activated.See section 8.4.11

AC5P Access setpointSub-menu that enables direct access tothe alarm setpoints from the display modeand defines a separate security code.See section 8.4.12

8.4.3 Alarm enable: EnbL

This function allows the alarm to be enabled ordisabled without altering any of the alarmparameters. Using the & or * push button selectAL1 or AL2 from the configuration menu and press( to access the alarm sub-menu. Press the& or * button until EnbL is displayed followed by( which will reveal if the function is on or off. Thesetting can be changed by pressing the & or *push button followed by the ) button to return tothe alarm sub-menu.

8.4.8 Type of alarm: tYPE

Alarm 1 and Alarm 2 are totally independent, bothmay be speed or run-time alarms, or one may beconditioned for speed and the other for run-time.Using the & or * push button select tYPE from theselected alarm sub-menu and press ( to check orchange the function. The & or * push button willtoggle the selection between 5PEEd and Hour5, whenset as required press the ) button to return to thealarm sub-menu.

Note: When tYPE is changed, the alarmconfiguration is automatically reset to thedefault values and the alarm is disabled. Itmust therefore be reconfigured before use.

8.4.6 Setpoint adjustment: 5P1.x & 5P2.xThe speed alarm setpoints 5P1.5peed and 5P2.5peed

may be positioned anywhere between 0000000 and9999999, and the run-time alarm setpoint 5P1.Hour5

and 5P2.Hour5 anywhere between 0000.0 and 9999.9

hours.

All the setpoints are adjusted in the same way, forexample, to adjust the setpoint of Alarm 1 which hasbeen configured to operate on the speed display.Using the & or * push button select 5P1.5peed inthe AL1 sub-menu and press ( which will revealthe existing setpoint with one digit flashing. Therequired setpoint can be entered using the & or *push button to adjust the flashing digit and the (button to transfer control to the next digit. When setas required press ) to enter the value and return tothe 5P1.5peed prompt in the alarm 1 sub-menu.

8.4.6 Alarm function: Hi . Lo

Alarm 1 and Alarm 2 are totally independent, bothmay be Hi or Lo, or one may be conditioned as a Hialarm and the other as a Lo alarm.Using the & or * push button select Hi . Lo fromthe selected alarm sub-menu and press ( to checkor change the function. The & or * push buttonwill toggle the alarm function between Hi and Lo,when set as required, press the ) button to returnto the Hi . Lo’ prompt in the alarm sub-menu.

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25

8.4.7 Alarm output status: no . nC

Each single pole alarm output may be open or closedin the non-alarm condition. When the BA517E-SSpower supply is turned off or disconnected, the alarmoutput(s) will open irrespective of whether normallyopen or normally closed outputs have been selected.Therefore, when designing an alarm system normallyclosed nc should be selected so that the output openswhen an alarm occurs or if the power supply fails.

Using the & or * push button select no . nC from theselected alarm sub-menu and press ( to check orchange the function. The & or * push button willtoggle the contact status between no and nC, when setas required, press the ) button to return to the no . nC

prompt in the alarm sub-menu

8.4.8 Hysteresis: H5tr

Hysteresis is only available on speed alarms so theH5tr function only appears in the configuration sub-menu when alarm tYPE has been set to 5PEEd. Duringconfiguration hysteresis is shown in the units of 5PEED

previously configured for the Tachometer display.

Using the & or * push button select H5tr in theselected alarm sub-menu and press ( which willreveal the existing hysteresis with one digit flashing.The required hysteresis can be entered using the& or * push button to adjust the flashing digit andthe ( button to transfer control to the next digit.When set as required press ) to enter the value andreturn to the H5tr prompt in the alarm sub-menu.

e.g. A Tachometer configured to display a rotationalspeed of 0 to 500 RPM, with a high alarm set at 400RPM and hysteresis of 10 RPM will perform asfollows:

The high alarm will be activated when speedequals or exceeds 400 RPM, but will not resetuntil the speed falls below 390 RPM.

8.4.9 Alarm delay: dELA

This function enables activation of the alarm output tobe delayed for a fixed time following the alarmcondition occurring. The delay can be set in 1 secondincrements up to 3600 seconds. If a delay is notrequired zero should be entered.

To adjust the delay select dELA using the & or *push button in the selected alarm sub-menu andpress ( which will reveal the existing delay time inseconds with one digit flashing. The required delaytime can be entered using the & or * push buttonto adjust the flashing digit and the ( button totransfer control to the next digit. When set asrequired press ) to enter the value and return to thedELA prompt in the alarm sub-menu.

The alarm annunciator will start flashing immediatelyan alarm condition occurs and will continue for thedelay time, after which the alarm output will beactivated and the alarm annunciator will bepermanently activated.

8.4.10 Alarm silence time: 5IL

The alarm silence function is primarily intended foruse in small installations where the alarm outputdirectly operates an annunciator such as a sounder.When the alarm silence time is set to any figureother than zero, the ( push button becomes analarm accept button.

After an alarm has occurred, operating the( button will cause the alarm output to revert to thenon-alarm condition for the configured alarm silencetime. When an alarm is silenced the alarmannunciator will flash until the silence time expires.

To adjust the alarm silence time select 5iL using the& or * push button in the selected alarm sub-menu and press ( which will reveal the existingalarm silence time in seconds with one digit flashing.The required delay time can be entered using the& or * push button to adjust the flashing digit andthe ( button to transfer control to the next digit.When set as required press ) to enter the valueand return to the 5iL prompt in the alarm sub-menu.

8.4.11 Flash display when alarm occurs: FL5H

In addition to the two alarm annunciators at thebottom left hand side of the Tachometer displaywhich show the status of both alarms, this functionprovides an even more conspicuous indication thatan alarm condition has occurred.

When enabled, this function alternates the speed orrun-time display between the numerical value andthe alarm identification AL1 or AL2 when an alarmoccurs.

Using the & or * push button select FL5H from theselected alarm sub-menu and press ( to check orchange the function. The & or * push button willtoggle the function between oFF and on, when set asrequired, press the ) button to return to the FL5H

prompt in the alarm sub-menu.

8.4.12 Access Setpoint: AC5P

This function activates a separate menu thatprovides direct access to the alarm setpoints whenthe Tachometer is in the display mode bysimultaneously operating the ( and * buttons.An operator can therefore adjust the alarm setpointswithout having access to the configuration and alarmsub-menus. Protection against unauthorised oraccidental adjustment is provided by a separatesecurity access code.

26

Using the & or * push button select AC5P from theconfiguration menu and press ( to reach the enablefunction EnbL. Pressing ( will reveal the existingsetting which can be toggled between on and oFF bypressing the & or * push button. When set asrequired, press the ) button to return to the EnbL

prompt from which a separate security access codecan be entered using the ACCd function which can beselected using the & or * push button.

To enter a new security code select ACCd from thesub-menu and press ( which will cause theTachometer to display 0000 with one digit flashing.The flashing digit may be adjusted using the& and * push button, when set as requiredoperating the ( button will transfer control to the nextdigit. When all the digits have been adjusted press) to return to the ACCd prompt. The revised securitycode will be activated when the Tachometer isreturned to the display mode. Default security accesscode 0000 will disable the security code allowingdirect access to the setpoints in the display mode bypressing the ( and * buttons simultaneously.

Please contact BEKA associates sales department ifthe security code is lost.

8.4.13 Adjusting alarm setpoints from the display modeAccess to the two alarm setpoints from theTachometer display mode is obtained by operating the( and * push buttons simultaneously as shown inFig 12. If the setpoints are not protected by a securitycode the alarm setpoint prompt 5P1.5peed or 5P1.Hour5

will be displayed depending upon whether a speed orrun-time alarm has been configured. If the setpointsare protected by a security code, CodE will bedisplayed first. Pressing ( again will allow the alarmsetpoint security access code to be entered digit bydigit using the & or * buttons to adjust the flashingdigit and the ( push button to move control to thenext digit. If the correct code is entered pressing )

will then cause alarm setpoint prompt 5P1.5peed or5P1.Hour5 to be displayed. If an incorrect securitycode is entered, or a button is not pressed within tenseconds, the instrument will automatically return to thedisplay mode.

Fig 12 Setpoint adjustment from the display mode

Once within the menu pressing the & or * buttonswill toggle the display between the two alarmsetpoint prompts 5P1x and 5P2x.

To adjust an alarm setpoint select 5P1x or 5P2x andpress ( which will reveal the current setting. Theflashing digit of the setpoint may be adjusted usingthe & or * push button and the ( button totransfer control to the next digit. When the requiredsetpoint has been entered, pressing ) will returnthe display to the 5P1x or 5P2x prompt from whichthe other setpoint may be selected, or the instrumentmay be returned to the display mode by pressing )again.

Note: Direct access to the alarm setpoints is onlyavailable when the menu is enabled - seesection 8.4.12

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8.5 Pulse outputA pulse output is available as a factory fitted option.Only one output option can be fitted to a BA517E-SS.

The pulse output is an isolated open collector havingthe following parameters:

Ron = 60 + 3VRoff = 1MImax = 10mA

The output pulse may be a synchronous duplicate ofthe input pulse, or may be scaled and the pulse lengthextended.

The retransmitted RTx annunciator on the instrumentdisplay shows the status of the retransmitted pulseoutput. Annunciator activation depends upon thesetting of 5ource in the pulse output configurationmenu.

5caled:

Annunciator activated each time pulse outputopen collector is on, i.e. Ron is less than 60Ω+ 3V.

direct:

Annunciator continuously activated

8.5.1 System designThe Tachometer pulse output is a passive circuit i.e.not powered, but it is totally isolated from all otherTachometer circuits. The pulse output terminals P1and P2 may be connected to another instrumentwhich will accept an open collector input.

Fig 13 shows how a resistor may be used to producea voltage pulse. The positive terminal of the pulseoutput circuit P1 is connected to the BA517E-SSTachometer’s positive supply terminal 1 at theinstrument. When an output pulse occurs and theopen collector 'closes', P2 is connected to P1 and apulse output current flows through the resistor R1.The current flowing in the circuit is determined byresistor R1 which should be chosen to limit the outputcurrent to less than 10mA. For a 24V supply R1should therefore be greater than 2,200Ω

Fig 13 Producing a voltage pulse output

8.5.2 ConfigurationWhen an optional pulse output is fitted to aBA517E-SS Tachometer the configuration menu isextended as shown in Fig 14 to include the pulseoutput sub-menu PuL5E . oP.

The pulse output sub-menu allows the source of theoutput pulse to be selected in the 5ourCE sub-function. For re-transmission applications theoutput pulse may be a synchronous duplicate of theinput pulse by selecting dirECt in the 5ourCE sub-function. When 5CALEd is selected, two additionalfunctions, diVidE and durAtion are introducedenabling the input pulse frequency to be divided toproduce the output pulse frequency, and the outputpulse width (duration) to be defined.

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8.5.3 Access Pulse output sub-menu: PuL5E . oP

Access the Tachometer configuration menu asdescribed in section 5.2. Using the & or * pushbuttons scroll though the menu until PuL5E . oP isdisplayed, pressing ( will then access the pulseoutput sub-menu which is shown in Fig 14.

Fig 14 Pulse output configuration sub-menu

8.5.4 Enable pulse output: EnbL

This function allows the pulse output to be disabled orenabled without altering any of the pulse outputparameters. Using the & or * push button selectEnbL in the pulse output sub-menu and press ( toreveal the existing setting on or oFF. The function canbe changed by pressing the & or * push buttonfollowed by the ) button to return to EnbL.

8.5.5 Source of output pulse: 5ourCE

The output pulse may be derived from:

dirECt Synchronously re-transmittedinput pulse.Output pulse is a duplicate of theTachometer input pulse.

5CALEd Input pulse scaled prior to re-transmission.Input pulse frequency may bedivided to produce output pulsewith defined duration by thediVidE and durAtion functions.

Using the & or * push button select 5ourCE in thepulse output sub-menu and press ( to reveal theexisting pulse source. The source can be changedby pressing the & or * push button followed bythe ) button to return to 5ourCE prompt.

8.5.6 Divide output pulse frequency: diVidE

When 5CALEd is selected in the 5ourCE function asdescribed in section 8.5.5, the output pulsefrequency is the Tachometer input pulse frequencydivided by one the following:

1

10

100

1000

10000

Using the & or * push button select diVidE in thepulse output sub-menu and press ( to reveal theexisting divisor. The value can be changed bypressing the & or * push button to select therequired value followed by the ) button to return todiVidE prompt.

Note: This function only appears in the pulseoutput sub-menu when 5CALEd is selected inthe 5ourCE function.

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8.5.7 Define output pulse width: durAtion

When 5CALEd is selected in the 5ourCE function asdescribed in section 8.5.5, the output pulse width inmilliseconds is defined by this function. One of 11pulse widths may be selected:

0 . 1

0 . 5

1

2 . 5

5

10

25

50

100

250

500

Using the & or * push button select durAtion inthe pulse output sub-menu and press ( to reveal theexisting pulse duration. The value can be changed bypressing the & or * push button to select therequired value followed by the ) button to return todurAtion prompt.

Note: This function only appears in the pulse outputsub-menu when 5CALEd is selected in the5ourCE function.

8.5.8 Pulse storageIf the diVidE and durAtion functions are configuredsuch that the output pulse frequency with the specifiedpulse width can not be output in real time, thegenerated pulses will be stored and transmitted at themaximum possible speed.

When the total display is reset to zero or the powersupply to the Tachometer is disconnected or turnedoff, any stored pulses will not be retained.

8.6 4/20mA outputThe BA517E-SS Tachometer can be supplied with afactory fitted galvanically isolated 4/20mA outputwhich may be configured to represent any part of theTachometer speed display. Only one output optioncan be fitted to a BA517E-SS.

8.6.1 System designThe Tachometer's 4/20mA output is a passivecurrent sink i.e. not powered, but it is totally isolatedfrom all other Tachometer circuits. It is effectively a2-wire 4/20mA transmitter requiring a minimumsupply of 5V with its current being controlled by theTachometer speed display. The 4/20mA outputterminals C1 and C3 may be directly connected toany other instrument with a 4/20mA loop poweredtransmitter input able to provide a 10V minimumsupply. Terminals C2 and C4 are internally linkedand may be used for joining a return 4/20mA wire.

Fig 15 shows a typical installation.

Fig 15 Application of 4/20mA output

8.6.2 Configuration and calibrationWhen a Tachometer is supplied with an optional4/20mA output the configuration menu is extendedas shown in Fig 21. The 4/20mA output sub-menuis accessed via the 4-20 oP function that is locatedbefore the Clr . Gtot function.

The 4/20mA output is controlled by the Tachometerspeed display, the speeds corresponding to 4 and20mA output are defined in the sub-menu.

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Fig 16 4/20mA output configuration sub-menu

8.6.3 Access 4/20mA output sub-menu: 4-20 oP

Access the Tachometer configuration menu is asdescribed in section 6.2. Using the & or * pushbuttons scroll though the menu until 4-20 oP isdisplayed, pressing ( will then access the 4/20mAoutput sub-menu which is shown in Fig 21.

8.6.4 Display corresponding to 4mA output: 4 . 000

The Tachometer speed display which corresponds toa 4.000mA output current is defined by this function.Using the & or * push button select 4 . 000 in the4/20mA output sub-menu and press ( to reveal theexisting speed display with one digit flashing. Therequired display can be entered using the & or *push button to adjust the flashing digit and the (button to transfer control to the next digit. When setas required, press ) to enter the value and return tothe 4 . 000 prompt in the 4/20mA output sub-menu.

8.6.5 Display corresponding to 20mA output: 20 . 000

The Tachometer display which corresponds to a20.000mA output current is defined by this function.Using the & or * push button select 20 . 000 in the4/20mA output sub-menu and press ( to reveal theexisting speed display with one digit flashing. Therequired display can be entered using the & or *push button to adjust the flashing digit and the (button to transfer control to the next digit. When setas required, press ) to enter the value and return tothe 20 . 000 prompt in the 4/20mA output sub-menu.

Note:

1. If the Tachometer calibration is changed the4/20mA output will automatically be set to3.5mA irrespective of the speed display. The4/20mA output should always be reconfiguredfollowing changes to the Tachometerconfiguration.

2. If the Tachometer and the 4/20mA current sinkoutput are powered from separate supplies,the 4/20mA output current will continue to flowwhen the Tachometer supply fails or is turnedoff. Powering both from a common supplyeliminates this effect.

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