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10.2

Fault finding after commissioning

ENSURE PLANT SAFETY BEFORE

STARTING MAINTENANCE

Live maintenance is permitted on
intrinsically safe equipment installed in
a hazardous area, but only certified test
equipment should be used unless a gas
clearance certificate is available.

If a BA384G fails after it has been functioning
correctly, the following table may help to identify the
cause of the failure.

Symptom

Cause

Check:

No display

No power supply

That there is

between 10 and

28V on terminals

1 & 2 with
terminal 1

positive.

Flow indicator not
rotating on one or

both inputs.

No input pulses

Output from

flowmeter.

Wiring between

flowmeters and

BA384G.

Flow indicator

rotating. HOLD

annunciator

activated.

Input is below

clip-off threshold

Clipoff

threshold and

adjust if

necessary.

Unable to enter

configuration

menu.

Incorrect security

code

That the correct

security code is

being used.

Contact BEKA if

code is lost.

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

10.3 Servicing

We recommend that faulty BA384G rate totalisers
are returned to BEKA associates or to your local
BEKA agent for repair.

10.4 Routine maintenance

The  mechanical  and  electrical  condition  of  the
instrument should be regularly checked.  Inspection
frequency  should  be  adjusted  to  suit  the
environmental conditions.

10.5 Guarantee

Instruments which fail within the guarantee period
should be returned to BEKA associates or your local
BEKA agent. It is helpful if a brief description of the
fault symptoms is provided.

10.6 Customer comments

BEKA is always pleased to receive comments from
customers about our products and services. All
communications are acknowledged and whenever
possible, suggestions are implemented.

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Содержание BA384E

Страница 1: ...Issue 5 9th July 2019 BA384G and BA384E Intrinsically safe Two input Rate Totaliser Issue 5 ...

Страница 2: ...ate totaliser function function 6 5 Input input 6 6 Input type inp type 6 7 Debounce debounce 6 8 Display update interval update 6 9 Count count 6 10 Upper display di5p 1 6 11 Lower display di5p 2 6 12 Position of decimal points dp 6 13 Flowmeter K factor factor a 6 14 Total scale factor 5cale t a 6 15 Rate scale factor 5cale r a 6 16 Timebase t ba5e 6 17 Display filter filter a 6 18 Clip off clp ...

Страница 3: ...3 7 Alarm function hi lo 11 3 8 Alarm output status no nc 11 3 9 Hysteresis h5tr 11 3 10 Alarm delay dela 11 3 11 Alarm silence time 5il 11 3 12 Flash display fl5h 11 3 13 Access setpoints ac5p 11 3 14 Adjusting alarm setpoints from totalising mode 11 4 4 20mA output 11 4 1 Intrinsic safety 11 4 2 System design 11 4 3 Configuration 11 4 4 Access 4 20mA output sub menu 4 20 op 11 4 5 Enable 4 20mA ...

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Страница 5: ...erent engineering units Either input or their sum or difference may be shown The instruments are controlled and configured via the four front panel push buttons a user defined four digit code may be entered to prevent accidental access to the instrument s configuration menu This instruction manual supplements the abbreviated instruction sheet supplied with each instrument 2 OPERATION Fig 1 shows a...

Страница 6: ...unter If buttons are pressed for longer than 10 seconds the grand total will be reset to zero if the grand total reset function clr gtot is enabled See 6 21 To reset the grand total to zero from the operating mode press the and buttons for ten seconds until CLr no is displayed Using the or button change the display to Clr YE5 and press which will reset the grand total and restore the original disp...

Страница 7: ...is received on the input being displayed Appears to rotate continuously when input frequency exceeds 0 5Hz Hold Activated when input frequency annunciator is below the clip off threshold for the input being displayed Reset Activated while the instrument is annunciator being reset Rate Identifies the rate display annunciator Total Identifies the total display annunciator RTx Retransmitted pulse ann...

Страница 8: ... with gases in groups Group A propane Group B ethylene Group C hydrogen In gases that may be used with equipment having a temperature classification of T1 450 C T2 300 C T3 200 C T4 135 C T5 100 C At ambient temperatures between 40 and 70 C 3 3 Special conditions for safe use CAUTION installation in Zone 0 When installed in a Zone 0 potentially explosive atmosphere requiring EPL Ga apparatus the i...

Страница 9: ... with the requirements for simple apparatus For intrinsic safety purposes sources of energy with output parameters less than 1 5V 100mA and 25mW are considered to be simple apparatus Clause 5 7 of EN60079 11 which allows their output parameters Uo Io Po to be ignored when assessing the safety of an intrinsically safe system thus simplifying loop assessment and documentation Almost any flowmeter wi...

Страница 10: ...between them is Ci 0nF Li 0µH The maximum cable capacitance and inductance that may be safely connected between the reset terminals RS1 and RS2 is Co 40µF Lo 1H The reset terminals may be directly connected to any mechanically operated switch located within the same hazardous area as the BA384G The switch and associated wiring should be able to withstand a 500V rms insulation test to earth If the ...

Страница 11: ...er installations protected by Zener barriers For simplicity the pulse output and the optional alarm and 4 20mA outputs are described separately in sections 8 and 11 of this manual Fig 2 BA384G used with Zener barriers The flowmeters may also be located in the safe area Fig 3 shows how additional Zener barriers are used to transfer signals to the Rate Totaliser in the hazardous area When more than ...

Страница 12: ...nsically safe flowmeters with an open collector output may be directly connected to input terminals 5 6 or 9 10 providing the flowmeter is located in the same hazardous area as the BA384G and the flowmeter and associated wiring can withstand a 500V rms insulation test to earth The BA384G contains a configurable debounce circuit to prevent false triggering Three levels of de bounce protection are i...

Страница 13: ...s the Rate Totaliser providing the switch and the associated wiring can withstand a 500V rms insulation test to earth No Zener barrier is required A BA384G may also be remotely reset from the safe area Any switch may be used but a Zener barrier is required to transfer the contact closure into the hazardous area which may be combined with the supply barrier so that only one package is required A di...

Страница 14: ...pper threshold Sensor Switching thresholds Lower Upper Switch 100Ω 1000Ω Proximity detector 1 2mA 2 1mA Open collector 2kΩ 10kΩ Magnetic pick off 0mV 40mV peak Voltage pulse low 1 0V 3 0V Voltage pulse high 3 0V 10 0V Switch contacts proximity detectors and open collector sensors require energising which is achieved by linking two BA384G terminals together for each input as shown in Figs 4 and 5 4...

Страница 15: ...of the instrument See section 6 7 4 2 7 Voltage pulse input Two voltage pulse input ranges are independently selectable in the BA384G Rate Totaliser configuration menu VoLt5 L and VoLt5 H When configured for either of the voltage pulse ranges the input terminals 5 6 and 9 10 comply with the requirements for simple apparatus This allows the inputs to be connected to any certified intrinsically safe...

Страница 16: ...ng conductor An insulated M4 stud is provided in the bottom right hand corner of the back box for interconnecting cable screens The BA384G Rate Totaliser may be pipe mounted using a BA393G pipe mounting kit or panel mounted using a BA394G or BA395G panel mounting kit 5 2 Installation Procedure Fig 6 illustrates the instrument installation procedure A Remove the Rate Totaliser assembly by unscrewin...

Страница 17: ... the instrument is ordered a blank scale card will be fitted which can easily be marked on site with a dry transfer or a permanent marker Custom printed scale cards are available from BEKA associates as an accessory To remove the scale card from a Rate Totaliser carefully pull the transparent tab at the rear of the instrument assembly away from the assembly as shown in Fig 8a Fig 8a Removing scale...

Страница 18: ...otalisier channel are identified with a suffix i e the rate scale factor 5CALE r A applies to channel A and 5CALE R b applies to channel b Configuration functions that do not have a channel suffix such as the timebase t bA5E apply to both channels The frequency of pulses received at each input is divided by FACtor A or FACtor b which is usually set to the K factor of the flowmeter thus converting ...

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Страница 22: ... within 60 seconds the instrument will automatically return to the totalising mode and any configuration changes will not be stored When configuring a BA384G Rate Totaliser it is therefore advisable to occasionally return to the totalising mode to ensure that recent configuration changes are stored in permanent memory 6 3 Summary of configuration functions This section summarises all the configura...

Страница 23: ...ACtor A Input A flowmeter K factor Each input of the rate totaliser is divided by FACtor A or factor b which are usually set to the K factor of the flowmeter thus converting the flowmeter output into engineering units FACtor may be adjusted between 0 0001 and 99999 When the 16 segment lineariser Lin is selected in the Function sub menu up to 16 values for FACtor a may be entered each starting at a...

Страница 24: ... and buttons are operated simultaneously for more than 3 seconds in the totalising mode See section 6 20 Local grand total reset clr gtot When on is selected grand total may be reset to zero when and buttons are operated simultaneously for more than 10 seconds in the totalising mode Note Once reset the grand total can not be recovered See section 6 21 Display Summary of function e clr External res...

Страница 25: ...menu and press which will reveal the inP tYPE prompt pressing again will reveal the existing input If set as required press twice to return to the configuration menu or repeatedly press the or button until the required type of input is displayed and then press twice to return to the configuration menu One of following six types may be selected for each input Switching thresholds Low High VoLt5 L V...

Страница 26: ...the required interval has been selected press to enter the selection and return to the configuration menu 6 9 Composite display Count The BA384G can produce a composite rate and total display from the sum or difference of Input A and Input b This composite display is only meaningful if Input A and Input b are calibrated to have the same engineering units of display This function defines the compos...

Страница 27: ...es per litre FACtor A therefore converts the flowmeter output into engineering units ready for further scaling to produce the required rate and total flow displays See Fig 9 When the 16 segment lineariser Lin is selected in FunCtion up to 16 values of FACtor A may be entered each starting at a specified input pulse frequency which may be adjusted to compensate for flowmeter non linearity See secti...

Страница 28: ...multiplies the rate display by 1 60 or 3 600 depending upon whether the Rate Totaliser is required to display flow rate per second per minute or per hour See Fig 9 To check or change the timebase select t bA5E from the configuration menu and press which will reveal the existing setting Pressing the or button will scroll through the following three options to display tb 1 for flow second tb 60 for ...

Страница 29: ...y decimal point are changed clip off will automatically be reset to zero A new clip off threshold must be entered after changes to any of these functions have been made 6 19 Local reset LoC clr The Local reset function contains two sub functions clr tot and clr gtot which when enabled allow each input total and the grand total to be reset to zero via the instrument push buttons while the Rate Tota...

Страница 30: ...xt digit When entered pressing will reset the grand total to zero and return the Rate Totaliser to the configuration menu Note Once reset the grand total can not be recovered 6 24 Security code CodE Access to the instrument configuration menu may be protected by a four digit alphanumeric security code which must be entered to gain access Unless otherwise requested new instruments are configured wi...

Страница 31: ...Flowmeter specification Flowmeters are usually supplied with a calibration certificate specifying the average K factor and the flow range over which it applies For use over extended flow ranges and for non linear devices multiple K factors will be specified often in a table similar to the one shown below Flow Rate Litres minute K factor Pulse litre 5 200 10 230 15 239 20 242 From this calibration ...

Страница 32: ...32 ...

Страница 33: ...ted to separate flowmeters with the same non linearity this sub function simplifies configuration by copying input A lineariser configuration to the input b lineariser so that the information only has to be entered once Select FACtor A in the configuration menu and press which will reveal one of five sub functions If Copy A2b is not displayed repeatedly press the or button to select Copy A2b Press...

Страница 34: ...is digit is correct pressing will transfer control to the next digit When the input frequency for this lineariser segment is set as required press the button to return to the segment identification display from which the next segment may be selected using or push buttons When the input frequency for all of the segments has been entered return to the FACtor A prompt in the configuration menu by ope...

Страница 35: ...b for re transmission applications or it may be derived from the least significant digit of the composite total display When derived from the composite total display the output pulse frequency may be divided and the output pulse width defined The retransmitted RTx annunciator on the instrument display shows the status of the retransmitted pulse output Annunciator activation depends upon the settin...

Страница 36: ...or a 24V supply R1 should be greater than 2 200Ω Fig 13 Transferring pulse output to safe area using a Zener barrier 8 3 Configuration The pulse output sub menu is accessed via the PuL5E oP function in the configuration menu The pulse output sub menu allows the source of the output pulse to be selected in the 5ourCE sub function For re transmission applications the output pulse may be a duplicate ...

Страница 37: ...e output may be be divided and width defined by functions diVidE and durAtion which are only available when 5CALEd is selected Note When input A input b A b is selected in the Count function the scaled pulse output 5CALEd is not available Using the or push button select 5ourCE in the pulse output sub menu and press to reveal the existing pulse source The function can be changed by pressing the or ...

Страница 38: ...tput The BA384G is required to display rate of flow in imperial gallons per hour with a resolution of one gallon and total flow in cubic metres with a maximum total of 100000 and a resolution of 0 01 cubic metres Linearisation is not required Totalisation is to stop when the flow rate on each input falls below 10 gallons per hour The display is to be updated twice per second For this application t...

Страница 39: ... Step 7 Lower display Using the or button select di5P 2 in the configuration menu and press to select if the lower display function The Rate Totaliser is required to display both total flow and the rate of flow so the lower display is required Using the or button select 5td and press to enter the selection and return to the di5P 2 prompt in the configuration menu See 6 11 Step 8 Position rate tota...

Страница 40: ...ted to 4 5461 Using the or push button select 5CALE r A from the configuration menu and press to reveal the existing value with one digit flashing This should be changed to 4 5461 using the or push button to adjust the flashing digit and the button to transfer control to the next digit and to position the decimal point Finally enter the new value and return to the 5CALE r A prompt in the configura...

Страница 41: ...nd grand total Two separate functions in the LoC clr sub menu may be individually activated to allow the operator to reset the individual totals and the composite grand total displays from the totalising mode without entering the configuration menu In this example the operator is required to reset the total displays but not the composite grand total display when the BA384G Rate Totaliser is in the...

Страница 42: ...g commissioning If a BA384G fails to function during commissioning the following procedure should be followed Symptom Cause Check No display No power supply or incorrect wiring Note Terminals 2 6 10 RS2 are interconnected within the instrument That there is between 10 and 28V on terminals 1 2 with terminal 1 positive Rate Totaliser is receiving power but flow indicator is not rotating when either ...

Страница 43: ...ecessary Unable to enter configuration menu Incorrect security code That the correct security code is being used Contact BEKA if code is lost If this procedure does not reveal the cause of the fault it is recommended that the instrument is replaced 10 3 Servicing We recommend that faulty BA384G rate totalisers are returned to BEKA associates or to your local BEKA agent for repair 10 4 Routine main...

Страница 44: ...djustable setpoint alarm delay time and alarm silence time Hysteresis may be applied to rate alarms CAUTION These alarm outputs should not be used for critical safety applications such as a shut down system When the BA384G power supply is turned off or disconnected alarm outputs will open irrespective of whether normally open or normally closed outputs have been selected When designing a system an...

Страница 45: ...play Summary of function EnbL Alarm enable Enables or disables the alarm without changing the alarm configuration See section 11 3 4 tYPE Type of alarm Defines whether the alarm operates on the rate or total of input A input b or the composite rate or total See section 11 3 5 5P1r A Alarm setpoint Adjusts the alarm setpoint The alarm is activated when the rate or total display equals the setpoint ...

Страница 46: ...splay between process value and alarm reference AL1 or AL2 when an alarm output is activated See section 11 3 12 Display Summary of function AC5P Access setpoint Sub menu that enables access to the alarm setpoints from the totalising mode and defines a four digit access code See section 11 3 13 Fig 17 Alarm menu ...

Страница 47: ...t and the button to transfer control to the next digit When set as required press to enter the value and return to the setpoint prompt in the alarm sub menu 11 3 7 Alarm function Hi Lo Alarm 1 and Alarm 2 are totally independent both may be Hi or Lo or one may be conditioned as a Hi alarm and the other as a Lo alarm Using the or push button select Hi Lo from the alarm sub menu and press to check o...

Страница 48: ...hich the alarm has occurred the fla5h function alternates the rate or total display between the numerical value and the alarm identification For example if alarm 1 has been activated by a rate alarm occurring on input A the rate display will alternate between the numerical rate value and AL1 plus the input identification in A if 5td has been selected for the lower display function di5P 2 configura...

Страница 49: ...alarm setpoint prompt 5P1r or 5P1t to be displayed If an incorrect security code is entered or a button is not pressed within ten seconds the instrument will automatically return to the totalising mode Once within the menu pressing the or buttons will toggle the display between the two alarm setpoint prompts Fig 18 Setpoint adjustment from the totalising mode To adjust an alarm setpoint select the...

Страница 50: ...tance specified by the certificate for the Zener barrier or galvanic isolator powering the 4 20mA output circuit 11 4 2 System design The Rate Totalisers 4 20mA output is a passive current sink i e not powered but it is totally isolated from all other Rate Totaliser circuits It is effectively a 2 wire 4 20mA transmitter requiring a minimum supply of 5V with the output current controlled by the Rat...

Страница 51: ...ub menu 11 4 7 Display which corresponds to 4mA output 4 000 The composite Rate Totaliser display which corresponds to a 4 000mA output current is defined by this sub function Using the or push button select 4 000 in the 4 20mA output sub menu and press which will reveal the existing display with one digit flashing The required display can be entered using the or push button to adjust the flashing...

Страница 52: ...t for a short period Be used with dust in subdivisions IIIA combustible flyings IIIB non conductive dust IIIC conductive dust Having a Minimum Ignition Temperature of Dust cloud 120 C Dust layer on Rate 155 C Totaliser up to 5mm thick Dust layer on Rate Refer to Totaliser over 5mm thick EN 60079 14 At an ambient temperature between 40 and 60 C A1 2 Installation and maintenance The installation req...

Страница 53: ...g certification codes Ex ia IIC T5 Ga Ta 40 C to 70 C Ex ia IIIC T80 C IP66 Da Ta 40 C to 60 C The specified IECEx gas and dust intrinsic safety parameters are identical to the ATEX safety parameters described in the main section and Appendix 1 of this manual The IECEx certificate may be downloaded from the BEKA associate ot the IECEx websites or requested from the BEKA sales office A2 2 Installat...

Страница 54: ...and IECEx parameters the systems shown in sections 3 and 4 of this manual may therefore also be used for US and Canadian installations subject to compliance with the local codes of practice ETL and cETL intrinsic safety codes USA Canada CL I Div 1 Groups A B C D T5 CL II Div 1 Groups E F G CL III 40ºC Ta 70ºC USA CL I Zone 0 AEx ia IIC T5 Ga Zone 20 AEx ia IIIC T80ºC Da 40ºC Ta 70ºC Canada Ex ia I...

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Страница 67: ...ield terminals and the two mounting holes are located in a separate compartment with a sealed cover allowing the instrument to be installed without exposing the display assembly The enclosure is fitted with a bonding plate to ensure electrical continuity between the three conduit cable entries A4 4 BA384E Accessories A4 4 1 Units measurement instrument identification The BA384E is fitted with a bl...

Страница 68: ...uired one or both of the IP66 stopping plugs may be replaced with an appropriate IP rated cable gland or conduit fitting d Connect the field wiring to the terminals as shown in Fig A4 2 6 Replace the instrument terminal cover and evenly tighten the two A screws If the BA384E is not bolted to an earthed post or structure the earth terminal should be connected to the plant potential equalising condu...

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