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Summary of Contents for BEKA BA307C
- Page 1 BA307C & BA308C Intrinsically safe loop-powered 3½ digit panel mounting indicators issue 9 Issue: 9 March 2013...
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Page 2: Table Of Contents
6.3 Decimal point 6.4 Reverse action Appendix 2 IECEx Certification 6.5 Calibration example 6.6 Over and under-range The BA307C and BA308C indicators 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
96 x 48mm BA308C 25.4mm 144 x 72mm The main application of the BA307C and BA308C is to display a measured variable or control signal in a hazardous process area. The zero and span of the display are independently adjustable so that... -
Page 4: 4/20Ma Input
3.3 Zones, gas groups and T rating The BA307C and BA308C have been certified as Group II, Category 1G, EEx ia IIC T5 apparatus at Tamb –40 to 60 C. -
Page 5: System Design For Hazardous
Zener barriers, a two 4.1 Transmitter loops channel Zener barrier or a galvanic isolator should The BA307C and BA308C may be connected in be used. Again it is necessary to ensure that the series with almost any intrinsically safe 4/20mA... -
Page 6: Installation
5. INSTALLATION 5.1 Location BA307C and BA308C indicators are housed in robust aluminium enclosures with a polyester front panel and a Noryl bezel. The front of both instruments provide IP65 protection and a gasket seals the joint between the instrument and the panel. -
Page 7: Installation Procedure
The indicator enclosure may be earthed locally by putting a tag under one of the rear panel corner fixing screws. performance shown instrument Fig 4B BA308C dimensions specification, and copies of the test report are available from BEKA associates. -
Page 8: Calibration
6. CALIBRATION The BA307C and BA308C will be supplied calibrated as requested at time of ordering. calibration is not requested, the indicator will be set to display 00.0 with 4.000mA input, and 100.0 with 20.000mA input. Both instruments are conditioned and calibrated by plug-in links and two multi-turn potentiometers. -
Page 9: Span Adjustment
The following adjustments are required: Position Display with 4mA see Fig 7 Input adjustable Step 1 The BA307C is required to display a Between positive zero therefore the suppression 0 to 500 0 and 500 / elevation links should be put in the... -
Page 10: Maintenance
No display Incorrect There should clearance certificate is available. Wiring be 1V If a BA307C or BA308C fails after it has been between functioning correctly, the following procedure terminals should be followed: 1 & 3 with terminal 1... -
Page 11: Guarantee
Put the suppression / elevation, zero, 8.1 Scale card span and decimal point links in the The BA307C and the BA308C have a window on required position. the right hand side of the display to hold a card showing the units of measurement e.g. ºC, mBar,... -
Page 12: Root Extractor
Fig 9. Step 1 Put the suppression / elevation links in When calibrating a BA307C or BA308C fitted with the elevation position. a root extractor the zero potentiometer should be adjusted to give the required display at 10% of flow... -
Page 13: Display Backlights
8.5 Display backlights The BA307C & BA308C indicators can be supplied with one of two types of backlight. The loop powered backlight produces green background illumination enabling the display to be read at night or in poor lighting conditions. No additional power... - Page 14 8.5.2 Loop powered backlight This backlight may be connected in series with the 4/20mA measuring circuit so that like the indicator it is loop powered. This eliminates the need for a separate Zener barrier or galvanic isolator and associated wiring backlight, thus significantly reducing the installation cost.
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Page 15: Appendix 1
National Electrical Code A1.1 Intrinsic safey approval ANSI/NFPA70. The BA307C and BA308C are approved to the FM Class 3610 intrinsic safety standard and Canadian The BA307C and BA308C have a T4 rating at Standard C22.2. Installations must comply with ambient temperatures between -20... -
Page 19: Appendix 2
BEKA associate certificates, please visit www.iecex.com A2.1 IECEx Certificate of Conformity The BA307C and BA308C loop powered indicators have been issued with an IECEx Certificate of Conformity number IECEx ITS 05.0002 which specifies the following certification code and...
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