BEKA ba326c, Manual

Page 1: ...rinsically safe loop powered analogue bargraph and digital indicator Issue 12 For instrument with serial numbers above 071235 01 001 Alarm setpoints Digital display Certification label Alarm annunciat...

Page 2: ...ver and under range 7 Calibration Examples 7 1 Using an external current source 7 2 Using the internal references 8 Maintenance 8 1 Fault finding during commissioning 8 2 Fault finding after commissio...

Page 3: ...ATEX Directive 2014 34 EU The EC Type Examination Certificate specifies that under fault conditions the output voltage current and power at input terminals 1 and 3 will not exceed those specified for...

Page 4: ...y be installed in any of the European Economic Area EEA member countries ATEX certificates are also accepted for installations in Switzerland This manual describes installations which conform with EN6...

Page 5: ...e incidents an ignition source due to impact or friction between the aluminium enclosure at the rear of the instrument mounting panel and iron steel is excluded 3 4 Certification label information The...

Page 6: ...ated then two Zener barriers a two channel Zener barrier or a galvanic isolator must be used When the hazard is a IIC gas and two single channel Zener barriers or a two channel Zener barrier are used...

Page 7: ...rast when viewed from directly ahead and slightly below the centre line of the instrument For reflective displays there is very little degradation of contrast when viewed from above the centre line bu...

Page 8: ...AL and ALr2 Access to the programme menu is obtained by operating the P and E push buttons simultaneously If the instrument is not protected by a security code the first parameter root will be display...

Page 9: ...ration See section 6 8 Display Description of function SEt Calibration of display using internal references Enables the zero and span of the digital indicator to be adjusted without the need for an ac...

Page 10: ...On or OFF If set as required press E to return to the menu or press the Up or Down button to change the setting followed by the E button to return to the main menu 6 4 Display resolution rESn This fun...

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Page 12: ...The indicator will display ZErO which is a request for a 4mA input current Adjust the external current calibrator to 4 000mA and again press P which will reveal the current zero display Each digit ex...

Page 13: ...a password protected sub menu which allows the mains line frequency at which the indicator has maximum ac rejection to be selected and the two internal references to be calibrated To gain access to t...

Page 14: ...internal references which should be periodically calibrated see section 6 10 2 6 12 Null display function null This function enables the BA326C analogue bargraph to operate as a deviation indicator di...

Page 15: ...able functions can be obtained by moving the internal security link to the override position The original security code can then be viewed by selecting CodE from the main menu and pressing P To gain a...

Page 16: ...or off by the Up or Down buttons Select OFF and press E to return to the main menu Step 4 Select frequency of max rejection Scroll though the main menu until Cond is displayed and press P The indicat...

Page 17: ...ter the code and the first parameter root in the main menu will be displayed Step 2 Square root extractor With root displayed press P which will reveal the root extractor status The root extractor can...

Page 18: ...ly display input has a voltage large ripple content Unable to Incorrect Enter correct enter the security security code or fit programme code security link in mode entered override position See Fig 9 8...

Page 19: ...nstrument terminal block s by gently pulling and remove the rear panel which is secured by six screws see Fig 9 The electronic assembly may then be pulled out of the enclosure to reveal the display la...

Page 20: ...menu provides direct access to both setpoints from the display mode without giving the operator access to the programme and alarm menus A different security code may be included to prevent tampering o...

Page 21: ...ctance specified by the system certificate of the circuit connected to each alarm Fig 13 Typical alarm application 9 2 3 Programming and adjustment When an alarm card is added to a BA326C the main pro...

Page 22: ...section 9 2 12 9 2 4 Alarm enable EnbL This function allows the alarm to be enabled or disabled without altering any of the alarm parameters To check or change the function select EnbL from the alarm...

Page 23: ...using the Up and Down push buttons and the P button to move to the next digit When the required hysteresis has been entered press E to return to the alarm menu Fig 14 Alarm Programme Menu P P E ALr2 E...

Page 24: ...1 Display alarm identification FLASH The status of each alarm is always shown by an alarm annunciator located above the digital display In addition to this annunciator this function provides an alarm...

Page 25: ...t may be adjusted using the Up and Down push buttons and the P button to move to the next digit When the required setpoint has been entered pressing E will return the display to the SP1 or SP2 prompt...

Page 26: ...ect CAL from the main menu and press P to enter the Add function press P again to reveal the current and total number of break points Each subsequent operation of the P push button will introduce an a...

Page 27: ...the Add function described above When the required number of break points has been entered return to the sub menu by pressing E The indicator will display Add or dEL depending upon the last function u...

Page 28: ...er input current at which each break point and to move to next digit P Enter requied display at each break point by pressing or and and to move to next digit P Calibration using internal references Wi...

Page 29: ...nd inductance of the display backlight is Ci 30nF Li 10 H To determine the maximum permissible cable parameters the equivalent backlight parameters must be subtracted from the maximum cable capacitanc...

Page 30: ...tions for safe use apply when installed in Zone 0 These are explained below WARNING installation in Zone 0 When installed in a Zone 0 potentially explosive atmosphere the indicator shall be installed...