BEKA BA338C Manual
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BEKA BA338C Manual

Intrinsically safe externally powered pulse input panel mounting rate totaliser
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Total
display
Rotating flow
indicator
BA338C
Intrinsically safe
Externally powered
pulse input
panel mounting
rate totaliser
Annunciators for
optional alarms
issue 13
Certification
information
label
Rate
display
rd
3
February 2011
Issue:
13

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Summary of Contents for BEKA BA338C

  • Page 1 BA338C Intrinsically safe Externally powered pulse input panel mounting rate totaliser issue 13 Certification information label Total display Rate display Rotating flow Annunciators for indicator optional alarms Issue: February 2011...

  • Page 2: Table Of Contents

    10. Index 6.7 Lower display 6.8 Rate scale factor Appendix 1 6.9 Timebase FM Approval for use in the USA The BA338C is CE marked to show compliance with the European Explosive Atmospheres Directive 94/9/EC and the European EMC Directive 2004/108/EC...

  • Page 3: Description

    The BA338C has two sets of input terminals for memory. connection to high or low level voltage pulses, a switch contact, an open collector output or to a two wire proximity detector.

  • Page 4: Intrinsic Safety Certification

    3. INTRINSIC SAFETY CERTIFICATION when these two push-buttons are operated simultaneously 3.1 ATEX certificate seconds. The BA338C has been issued with an EC-Type Selectable function from programme Examination Certificate by Notified Body Intertek menu. Testing Services (ITS) confirming compliance with See section 6.12 the European ATEX Directive 94/9/EC for Group II, Category 1, gas atmospheres, EEx ia IIC T5.

  • Page 5: Pulse Input Terminals

    Providing power at terminals 3 & 4 will not exceed those the switch and the BA338C are both located in the specified for simple apparatus in Clause 5.4 of same hazardous area, the switch may be EN50020:1994.

  • Page 6: Remote Reset Terminals

    3.4 Remote reset terminals Be used with gases in groups: The BA338C total display may be reset to zero by Group A propane connecting the reset terminals 7 and 8 together for Group B ethylene more than one second. These two terminals have...

  • Page 7: System Design For Hazardous Area

    4.2.2 Pulse input To assist with system design, the Zener barrier As shown in Fig 2 the BA338C will count pulses system certificate specifies the maximum cable from a wide variety of sources in the hazardous parameters for popular barriers and lists some of area, or from the safe area as shown in Fig 3.

  • Page 8: Switch Contact Input

    500V rms insulation test to earth. No Zener barrier is required. 4.2.5 Voltage pulse input Voltage pulse sources should be connected to The BA338C may be reset to zero from the safe terminals 3 and 4. These terminals comply with area.

  • Page 9: Use With Galvanic Isolators

    4.3.2 Pulse input isolators. For simplicity, connections for the As shown in Fig 4 the BA338C will count pulses optional pulse output, 4/20mA output and backlight from a wide variety of sources. Terminals 5 and 6 are included in the appendix to this manual.

  • Page 10: Switch Contact Input

    No galvanic isolator is required. in the hazardous area may be directly connected to terminals 5 & 6 providing it can withstand a The BA338C may be reset to zero from the safe 500V rms insulation test to earth for one minute. area.

  • Page 11: Installation

    Fig 6 shows the overall dimensions of the BA338C and the panel cut-out. To achieve an IP65 seal between the instrument enclosure and the panel the smaller cut-out must be used and the instrument secured with four panel mounting clips.

  • Page 12: Emc

    5.3 EMC The BA338C complies with the requirements of the European EMC Directive 2004/108/EEC. specified immunity all wiring should be in screened twisted pairs. To prevent circulating currents, cable screens should only be earthed at one point in the safe...

  • Page 13: Programming And Calibration

    When the BA338C is fitted with alarms, 4/20mA output or a pulse output, the basic menu is expanded to include the option(s). Section 9 of this manual explains how to programme these additional functions.

  • Page 15: Summary Of Programmable Functions

    All new BA338C rate totalisers are supplied Display Description of function calibrated as requested at the time of ordering. If calibration information supplied, 'SCALE-r' Rate Scale Factor instrument will be conditioned for an open collector Defines the arithmetic relationship input, with SCALE-r and SCALE-t set to 1 and a between the pulse input frequency timebase of seconds.

  • Page 16: Display Update Interval

    P push-button will toggle control between the 6.5 Type of input: ‘InPut’ two displays. When both decimal points have The BA338C may be programmed to accept pulse been correctly positioned press E to return to the inputs from a wide variety of sensors. To define main menu.

  • Page 17: Lower Display

    Select the required multiplier and press E to return This function turns the lower display on or off. to the main menu. When turned off, the BA338C will only have one eight digit display which may be programmed to show total flow or rate of flow.

  • Page 18: Total Scale Factor

    If the flowmeter has a K factor of 45.6 pulses clip-off threshold may then be entered. per litre and the BA338C total display is required in units of 1,000 gallons, then SCALE-t should be set to number of pulses produced by the flowmeter per 6.13 Local reset of total display:...

  • Page 19: Resetting Grand Total

    6.14 Resetting grand total: ‘CLr. Gtot’ The grand total is a separate sixteen digit counter which duplicates the total display but is not zeroed when the total display is reset to zero. The grand total may be viewed in the display mode in two eight digit sections as described in section 2.2 of this manual.

  • Page 20: Calibration Example

    5 to 60 litres per minute. terminals 3 & 4. The BA338C is required to display rate of flow in litres per hour with a resolution of one litre and Step 4 Position rate &...
  • Page 21 Down button will toggle the display There are 1000 litres in a cubic metre between ‘On’ and ‘OFF’. Select ‘On’ so the BA338C is required to display 1 and press E to return to the ‘LOCrSEt’ cubic metre for every 1,050 x 1,000 prompt in the main menu.
  • Page 22 Step 13 Return to the display mode Following completion of programming and calibration, return the BA338C to the operating mode by pressing E. All the programming functions will now be stored in permanent memory and will protected...

  • Page 23: Maintenance

    Terminals 2, 4, 1 & 2 with terminal 6 & 8 are 1 positive. If a BA338C fails after it has been functioning interconnected within the correctly, the following table may help to identify BA338C the cause of the failure.

  • Page 24: Accessories

    9.1 Scale card silence time. Hysteresis may be applied to rate The BA338C has a window on the right hand side alarms. of the display to hold a card showing the units of measurement e.g.

  • Page 25: Programming And Adjustment

    See section 9.3.9 9.3.3 Programming and adjustment 'dELA' Alarm delay time When a BA338C is supplied with alarms the main Adjusts the delay between the display programme menu is extended as shown in Fig 13. equalling the setpoint and the alarm The two alarm functions appear between the 'LOC- output being activated.
  • Page 26 Fig 13 Alarm menu structure 9.3.4 Alarm enable: ‘EnbL’ 9.3.5 Type of alarm: ‘tYPE’ This function allows the alarm to be enabled or Alarm 1 and Alarm 2 may both be rate or total disabled without altering any of the alarm alarms, or one may be conditioned for rate and the parameters.
  • Page 27 A BA338C calibrated to display a flow of 0 to programmed, from the alarm menu. Press P which 5000, with a high alarm set at 4000 and hysteresis will reveal the existing value with one digit flashing.

  • Page 28: Adjusting Alarm Setpoints From Display Mode

    9.3.12 Access Setpoint: ‘AcSP’ flashing digit and the P push-button to move This function activates a separate menu that control to the next digit. If the correct code is provides direct access to the alarm setpoints when entered pressing E will then cause alarm setpoint the instrument is in the display mode.

  • Page 29: Display Backlight

    Zener barriers and galvanic isolators have therefore been issued. 9.5 Pulse output The BA338C may be supplied with an opto- The backlight must be powered from the safe area isolated solid state pulse output. The output is a via a Zener barrier or a galvanic isolator as shown...

  • Page 30: Intrinsic Safety

    BA338C. Fig 16 shows how the pulse output circuit may be powered from the BA338C supply to drive a counter in the safe area via a diode return barrier. 9.6 4/20mA output The optional 4/20mA output may be programmed to produce an analogue output proportional to the whole or part of the rate display.
  • Page 31 When this digit is set as required, pressing P will transfer control to the next digit. Note 2: If the BA338C and the 4/20mA current sink output are powered from separate supplies, When the flow rate corresponding to an output...

  • Page 32: Index

    10. INDEX Subject Section Subject Section ‘AcSP’ 9.3.3; 9.3.12 ‘InPut’ Alarms optional Installation access 9.3.3; 9.3.12 Intrinsic safety 1; 3; 9.5.1 contacts 9.3.3; 9.3.8 9.6.1 delay time 9.3.3; 9.3.10 enable 9.3.3; 9.3.4 ‘LOC.rSEt’ 6.13 function 9.3.3; 9.3.7 Local reset 6.13 hysteresis 9.3.3;...
  • Page 33 BEKA associates Control A1.1 Intrinsic safey approval Drawing CI330-34, which is attached to this The BA338C is approved to the FM Class 3610 Appendix, and with the National Electrical Code intrinsic safety standard. Installations must comply ANSI/NFPA70.

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