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Summary of Contents for BEKA BA327C
- Page 1 BA327C & BA328C intrinsically safe loop-powered 4½ digit panel mounting indicators issue 11 Issue: 11 November 2009...
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Page 2: Table Of Contents
USA and Canada. 7.1 Using an external calibrator 7.2 Using the internal calibrator Appendix 2 IECEx Certification The BA327C & BA328C are 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
Clause 5.4 of EN50020:1994. The BA327C and BA328C are also FM and cFM approved for use in the USA and Canada, these approvals are described in Appendix 1. -
Page 4: Controls
3. INTRINSIC SAFETY CERTIFICATION 3.3 Zones, gas groups and T rating The BA327C and BA328C have been certified EEx 3.1 ATEX certificate ia IIC T5. When connected to a suitable system... -
Page 5: Certification Label Information
BEKA associates' name and location. European certification information may also be Fig 2 BA327C or BA328C in a transmitter loop shown. 4.2 Remote indication BA327C and BA328C indicators may be driven via... - Page 6 If one side of the 4/20mA current loop may be earthed, a single channel Zener barrier provides the lowest cost protection. If the 4/20mA signal is not isolated, then two Zener barriers, a two channel Zener barrier or a galvanic isolator must be used.
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Page 7: Installation
5. INSTALLATION 5.1 Location BA327C and BA328C indicators are housed in robust aluminium enclosures with polyester front panels and Noryl bezels. The front of both instruments have IP65 protection, and a gasket seals the joint between the instrument enclosure and the panel. The indicators may be installed in any panel providing the environmental limits shown in the specification are not exceeded. -
Page 8: Emc
Fig 5 Fitting panel mounting clips 5.3 EMC The BA327C and BA328C comply with the requirements of the European EMC Directive 2004/108/EEC. For specified immunity all wiring should be in screened twisted pairs, with the screens earthed within the safe area. -
Page 9: Programming And Calibration
6. PROGRAMMING AND CALIBRATION 6.1 Summary of programmable functions The BA327C and BA328C are programmed and This section summarises each of the main calibrated via four front panel push-buttons. programmable functions and includes a cross the functions are contained in an easy to use menu reference to more detailed information. -
Page 11: Root Extractor
Display Description of function 6.2 Root extractor: root This function is primarily intended for use with differential flowmeters which have a square law 'FrE' Frequency rejection Defines the mains (line) frequency at 4/20mA output. To activate the square root extractor select 'root' from the menu and press P which the indicator has maximum ac which will reveal if the function is 'On' or 'OFF'. -
Page 12: Calibration Using Internal References
To adjust the display at 20mA, press the Up button return to the 'SPAn' prompt followed by E to return which will cause the indicator to display 'SPAn'. to the menu. Adjust the external current calibrator to 20.000mA and again press P which will reveal the existing 6.7 Conditioning sub-menu: Cond full scale display. -
Page 13: Function Of The P Push-Button
To calibrate the references connect a calibrator to To gain access to the security code link, remove terminals 1 and 3. Select 'rEF' from the sub-menu the instrument terminal block by gently pulling. and press P which will result in a '0.004A' prompt Unscrew the four corner screws securing the rear being displayed. -
Page 14: Calibration Example
E to return to the main menu. 7.2 Using the internal calibrator Step 4 Select frequency of max rejection As in 7.1 the BA327C is required to display: Scroll though the main menu until 'Cond' is displayed. Enter the sub-menu by -50.0 with a 4mA input... - Page 15 Step1 Enter the programming mode Step 6 Calibrate display With an input current between 4 and With any input current between 4 and 20mA indicator 20mA select 'SEt' from the main menu programming mode by simultaneously and press P. The indicator will display pressing P and E.
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Page 16: Maintenance
If a BA327C or BA328C fails after it has been 8. MAINTENANCE functioning correctly, the following procedure should be followed: 8.1 Fault finding during commissioning If a BA327C or BA328C fails to function during commissioning the following procedure should be... -
Page 17: Accessories
9. ACCESSORIES 9.1 Scale card The BA327C and the BA328C have a window on the right hand side of the display to hold a card showing the units of measurement e.g. C, mBar, RPM. Indicators can be supplied with a printed scale card showing any units specified at the time of ordering. -
Page 19: Programming And Adjustment
Alarm silence time 9.3.3 Programming and adjustment Defines the time that the alarm output When an alarm card is added to a BA327C or remains in the non-alarm condition BA328C indicator the main programme menu is following acceptance of an alarm. - Page 20 9.3.4 Alarm enable: EnbL 9.3.8 Hysteresis: HStr This function allows the alarm to be enabled or During programming hysteresis is shown in the disabled without altering any of the alarm units the indicator has been calibrated to display. parameters. To check or change the function To adjust the hysteresis select 'HStr' from the select 'EnbL' from the alarm menu and press P alarm menu and press P which will reveal the...
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Page 21: Access Setpoint
between the two alarm setpoint prompts 'SP1' and 9.3.11 Access Setpoint: AcSP 'SP2'. This function controls a separate menu which provides direct access to the alarm setpoints when If an incorrect security code is entered, or a button the indicator is in the display mode. See section 9.3.12 for a full description. -
Page 22: Lineariser
The number of break-points required should first 9.4 Lineariser be entered using the Add and dEL functions. In The indicator can be supplied with a sixteen point lineariser which may be adjusted to compensate both these functions the indicator initially displays the current break-point and the total number of for almost any non linear variable. -
Page 23: Calibration Using Internal
Repeat this procedure for each break-point, and Select 'SEt' from the main menu and press P once then return to the main menu by pressing E twice. to enter the 'Add' function, and again to reveal the current and total number of break-points. Each subsequent operation of the P push-button will... -
Page 25: Tare Function
9.6 Display backlights The BA327C and BA328C can be supplied with one of two different backlights. The loop powered backlight produces green background illumination enabling the display to read at night or in poor lighting conditions. -
Page 26: Loop Powered Backlight
For a BA328C Backlight mA = Vsupply –18 End-to-end resistance of barrier # or output resistance of galvanic isolator Two indicator backlights may be powered in parallel from a single 28V 300 Zener barrier or galvanic isolator, but the display brilliance will be reduced. -
Page 27: Appendix 1 Fm & Cfm Approval For Installation In Usa And Canada
For installations in the USA and Canada both A1.3.1 Alarms indicators and all accessories have been approved The FM approval allows the BA327C and BA328C by Factory Mutual as intrinsically safe for Class I, to be fitted with an alarm card which contains two... - Page 28 A1.3.1.2 Nonincendive applications A1.3.2.2 Loop powered backlight For nonincendive applications a Zener barrier or This backlight has been approved as a separate galvanic isolator is not required. Each alarm intrinsically safe circuit under the entity concept. output may switch any dc circuit providing the As shown in Fig 16 the backlight may be voltage does not exceed 32V and the current is connected in series with the indicator and powered...
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Page 32: Appendix 2 Iecex Certification
BEKA associate certificates, please visit www.iecex.com A2.1 IECEx Certificate of Conformity The BA327C and BA328C loop powered indicators have been issued with an IECEx Certificate of Conformity number IECEx ITS 05.0003 which specifies the following certification code and...
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