BEKA BA314NG Manual
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BEKA BA314NG Manual

Ex na and ex tc tachometer
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BA314NG
Ex nA and Ex tc
Tachometer
Issue 5
Issue:
5
9
th
July 2019

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Summary of Contents for BEKA BA314NG

  • Page 1 BA314NG Ex nA and Ex tc Tachometer Issue 5 Issue: July 2019...

  • Page 2: Table Of Contents

    8.1 Fault finding during commissioning 8.2 Fault finding after commissioning 8.3 Servicing 8.4 Routine maintenance 8.5 Guarantee 8.6 Customer comments The BA314NG are CE marked to show compliance with the European Explosive Atmospheres Directive 2014/34/EU and the European EMC Directive 2014/30/EU...
  • Page 3 CONTENTS CONTINUED 9. Accessories Appendix 1 ATEX dust certification 9.1 Units of measurement and instrument identification. Appendix 2 IECEx certification 9.2 Display backlight Appendix 3 ETL & cETL certification for installation in USA and Canada. 9.3 Alarms 9.3.1 Solid state output 9.3.2 Ex nA certification 9.3.3 Configuration &...

  • Page 4: Description

    1. DESCRIPTION 2. OPERATION The BA314NG is an Ex nA and Ex tc certified, field Fig 1 shows a simplified block diagram of the mounting Tachometer primarily intended BA314NG Tachometer. The instrument can accept measuring rotational speed within a Zone 2 or 22 pulses from most types of sensor and display speed hazardous area.

  • Page 5: Initialisation

    May be turned off. 2.2 Controls See 6.8 The BA314NG is controlled and configured via four front panel push buttons. In the display mode i.e. when the instrument is displaying speed the push Pulse input...

  • Page 6: Certification

    3. CERTIFICATION In gases that may safely be used with equipment having a temperature classification of: The BA314NG has ATEX and IECEx Ex nA gas and Ex tc dust certification. The main sections of this instruction manual describes ATEX gas certification.

  • Page 7: Pulse Input

    3.6 Pulse input The BA314NG Tachometer has a single pair of pulse input terminals 5 and 6 that may be configured for use with different types of sensor. For sensors that require energising to determine their state, such as switch contacts or a 2-wire proximity detector, an external link between terminals 3 &...

  • Page 8: System Design For Gas Hazardous Areas

    There are four design requirements: isolation. These two requirements may be satisfied by using DIN rail mounted terminals incorporating a 1. The BA314NG should be powered from a circuit fuse with easily removable fuses which can be that has output safety parameters in normal extracted to achieve isolation as shown in Fig 2.

  • Page 9: Pulse Input

    4.2 Pulse input The BA314NG can display speed and run-time from Providing the BA314NG Tachometer is correctly sensors with a wide variety of pulse outputs located in installed in Zone 2, the input terminals may be a Zone 2 hazardous areas or in a safe area. Fig 3...

  • Page 10: Open Collector Input

    See section 6.6. 4.2.5 Magnetic pick-off input Sensors incorporating a magnetic pick-off will usually have a low level ac voltage output which a BA314NG Tachometer can sense when configured for a CoiL input. The Tachometer input terminals 5 and 6 may...

  • Page 11: Installation

    INSTALLATION Location The BA314NG Tachometer is housed in a robust IP66 glass reinforced polyester (GRP) enclosure incorporating an armoured glass window and stainless steel fittings making it suitable for exterior mounting in most industrial on-shore and off-shore installations. The Tachometer should be positioned where the display is not in continuous direct sunlight.

  • Page 12: Emc

    The BA314NG complies with the requirements of the European EMC Directive 2014/30/EU. For specified immunity all wiring should be in screened twisted pairs, with the screens earthed at one point in the safe area. Units of measurement and tag marking on scale card.

  • Page 13: Configuration Structure

    0000 has already been entered, the instrument 6.1 Configuration structure will display CodE. Press ( to clear this prompt and Fig 9 shows the BA314NG calibration structure. enter the security code for the instrument using the & or * push button to adjust the flashing digit, The pulse input is divided by 5CALE.
  • Page 14 6.3 Summary of configuration functions Display Summary of function This section summarises configuration functions. When read in conjunction with Fig 10 it Decimal points provides a quick aid for configuring the Tachometer. If Defines the position of the decimal more detail is required, each section contains a point in the Tachometer speed reference to a full description of the function.
  • Page 15 Display Summary of function Display Summary of function Local reset Resets grand total run-time to LoC clr CLr Gtot Contains sub-menu with zero. functions enabling run-time This function resets the grand total display and grand total run-time to be run-time to zero from within the reset to zero via the front panel push configuration menu when CLr YE5 is buttons when the Tachometer is in the...
  • Page 18 6.4 Input: inPut 6.6 Debounce: dEbouncE Input function contains sub-functions dEbouncE is an adjustable sub-menu in the inPut which configure function which prevents the Tachometer miscounting inP . tYPE dEbounCE Tachometer input and define the amount of input when the input pulse has noisy edges, such as those noise rejection.

  • Page 19: Position Of The Decimal Points: Dp

    6.7 Display update interval: uPdAtE If the Tachometer display is likely to change rapidly, a When this digit has been adjusted as required, longer interval between display updates may simplify pressing ( will transfer control to the next digit. reading the display. This function allows one of six When all the digits have been adjusted pressing different display intervals between 0.5 and 5 seconds ( will transfer control to the decimal point which...

  • Page 20: Clip-Off: Clp Off

    The second digit defines the deviation from the To check or change the clip-off threshold select displayed speed at which the filtering defined by the CLP oFF from the configuration menu and press first digit will be overridden and the Tachometer speed ( which will reveal the current setting.

  • Page 21: Local Grand Total Run-Time Reset: Clr Gtot

    Using the & or * button select mode. clr gtot and press ( which will show if the local Please contact BEKA associates sales department if grand total reset is on or oFF. If set as required the security code is lost.

  • Page 22: Pulse Output

    The pulse output should not be directly connected to intrinsically safe equipment. Fig 11 shows a BA314NG Tachometer mounted in Zone 2 retransmitting a pulse to the safe area. The current pulse flows through R1 resulting in a voltage pulse output with an amplitude of about 20V.

  • Page 23: Configuration

    6.20.3 Configuration 6.20.5 Enable pulse output: EnbL The pulse output sub-menu which is within the This function allows the pulse output to be enabled instrument configuration menu is shown in Fig 12. or disabled without altering any of the pulse output For re-transmission applications the output pulse may parameters.

  • Page 24: Pulse Storage

    6.20.8 Output pulse width: durAtion When 5CALEd is selected in the 5ource sub-function (6.24.6) the output pulse width is defined by this function. One of following millisecond pulse widths may be selected: 0. . 1 0. . 5 2. . 5 Using the &...

  • Page 25: Configuration Example

    7. CONFIGURATION EXAMPLE In this example a BA314NG Tachometer is connected Using the & or * push button select to a proximity detector producing 105 pulses per 0 . 5 (0.5 seconds i.e. 2 display updates revolution. per second). Enter the selection and...
  • Page 26 It is to reset the run-time display but not the recommended that the second digit is grand total run-time when the BA314NG initially set to 0. Tachometer is in the display mode. Using the & or * button select LoC clr...
  • Page 27 Step 14 Reset the grand total to zero Step 16 Return to the display mode Before completing configuration the run- Configuration of the BA314NG is now time grand total should be reset to zero. complete. Pressing the ) button will Using the &...

  • Page 28: Maintenance

    Incorrect speed 5CALE indicator rotating, display calibration. t-bA5E but incorrect speed If a BA314NG Tachometer fails after it has been display functioning correctly, the following table may help to identify the cause of the failure. Pulse input Run-time display is...

  • Page 29: Guarantee

    8.5 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. 8.6 Customer comments BEKA associates is always pleased to receive comments from customers about our products and services.

  • Page 30: Units Of Measurement And Instrument Identification

    5.4 of this manual. shut down system. The BA314NG can also be supplied with a blank or custom laser engraved stainless steel legend plate - When the BA314NG Tachometer power supply is see Fig 7.

  • Page 31: Ex Na Certification

    9.3.3 Configuration and adjustment to switch suitably protected equipment located in Zone When a BA314NG is supplied with alarms the 1 or 2 of a hazardous area, or equipment located in a configuration menu is extended as shown in Fig 15 safe area.
  • Page 32 Display Summary of function Normally open or normally closed no . nc output. Determines whether the single pole alarm output is open or closed in the non-alarm condition. See section 9.3.8 Hysteresis H5tr Adjusts the alarm hysteresis. Only available on a speed alarm. See section 9.3.9 Alarm delay time dELA...

  • Page 33: Alarm Enable: Enbl

    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 are totally independent, both disabled without altering any of the alarm parameters. may be speed or run-time alarms, or one may be Using the &...

  • Page 34: Alarm Function: Hi . Lo

    Each single pole alarm output may be open or closed To adjust the delay select dELA using the & or * in the non-alarm condition. When the BA314NG push button in the selected alarm sub-menu and power supply is turned off or disconnected, the alarm...

  • Page 35: Alarm Silence Time: 5Il

    9.3.12 Flash display when alarm occurs: FL5H In addition to the two alarm annunciators at the Please contact BEKA associates sales department if bottom left hand side of the Tachometer display which the security code is lost. show the status of both alarms, this function provides an even more conspicuous indication that an alarm condition has occurred.
  • Page 36 Fig 16 Setpoint adjustment from the display mode To adjust an alarm setpoint select 5P1x or 5P2x and press ( which will reveal the current setting. The flashing digit of the setpoint may be adjusted using the & or * push button and the ( button to transfer control to the next digit.

  • Page 37: 4/20Ma Output

    9.4 4/20mA output To comply with the requirements of EN 60079-14 The BA314NG Tachometer can be supplied with a Electrical installations design, selection and erection, factory fitted galvanically isolated 4/20mA output each of the wires entering the hazardous area which may be configured to represent any part of the should be individually fused and contain a means of Tachometer speed display.

  • Page 38: Access 4/20Ma Output Sub-Menu

    9.4.3 Configuration and calibration 9.4.6 Display which corresponds to 4mA When a Tachometer is supplied with an optional output: 4 . 000 4/20mA output the configuration menu is extended as The Tachometer speed display which corresponds to shown in Fig 18. The 4/20mA output sub-menu is a 4.000mA output current is defined by this function.
  • Page 39 Special conditions for safe use are specified by the Ex ic tc certificate indicated by the certificate A1.0 ATEX dust certification number's 'X' suffix. These state that the BA314NG In addition to ATEX Ex nA certification permitting Tachometer should be:...
  • Page 40 ATEX safety parameters described in the main section and in Appendix 1 of this manual. The IECEx certificate may be downloaded from the BEKA associates or the IECEx website, or may be requested from the BEKA sales office. A2.2...
  • Page 41 ETL & cETL certification for installations in USA and Canada. A3.0 cETL Mark For installations in the USA and Canada, the BA314NG Tachometer has ETL and cETL Ex nA and Ex tc approval, Control Number 4008610. Copies of the Authorisation to Mark may be down loaded from the BEKA associates website www.beka.co.uk or...

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