BA307E, BA327E, BA308E & BA328E intrinsically safe ... - Ex-Baltic

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2CONTENTS1. Description2. Operation2.1 Controls3. Intrinsic safety certification3.1 ATEX gas certificate3.2 Zones, gas groups & T rating3.3 Special conditions for safe use3.4 4/20mA input3.5 Certification label information4. System Design for Gas HazardousAreas4.1 Transmitter loops4.2 Remote indication5. Installation5.1 Location5.2 EMC5.3 Installation procedure5.4 Scale card6. Configuration and Calibration6.1 Summary of configurationfunctions.6.2 Indicator function6.3 Resolution6.4 Position of decimal point6.5 Calibration using an externalcurrent source.6.6 Calibration using internalreference.6.7 Bargraph format and calibration6.8 Function of the P push-button6.9 Tare function6.10 Security code6.11 Under and over-range8. Maintenance8.1 Fault finding during commissioning8.2 Fault finding after commissioning8.3 Servicing8.4 Routine maintenance8.5 Guarantee8.6 Customer comments9. Accessories9.1 Scale card9.2 Tag strip9.3 Alarms9.3.1 Solid state output9.3.2 Intrinsic safety9.3.3 Configuration and adjustment.9.3.4 Alarm enable9.3.5 Setpoint adjustment9.3.6 Alarm function9.3.7 Alarm output status9.3.8 Hysteresis9.3.9 Alarm delay9.3.10 Alarm silence time9.3.11 Flash display when alarmoccurs.9.3.12 Access setpoint in displaymode.9.3.13 Adjusting alarm setpoint fromthe display mode.9.4 Display backlight9.4.1 Loop powering the backlight9.4.2 Separately powering thebacklight.Appendix 1 ATEX dust certificationAppendix 2 IECEx gas and dust certification7. Lineariser7.1 Lineariser calibration using an externalcurrent source.7.2 Lineariser calibration using internalreference.7.3 Lineariser error message7.4 Lineariser under and over-range7.5 Lineariser default configurationThe BA307E, BA327E, BA308E & BA328E are CE marked to show compliance with the European ExplosiveAtmospheres Directive 94/9/EC and the European EMC Directive 2004/108/EC
31. DESCRIPTIONThese panel mounting, intrinsically safe digitalindicators display the current flowing in a 4/20mAloop in engineering units. They are loop poweredbut only introduce a 1.2V drop, which allows themto be installed into almost any 4/20mA currentloop. No additional power supply or battery isrequired.The four models are electrically similar, but havedifferent size displays and enclosures.Model Display Bezel sizeBA307E 4 digits 15mm high 96 x 48mmBA327E 5 digits 11mm high 96 x 48mmand bargraph.BA308E 4 digits 34mm high 144 x 72mm2. OPERATIONFig 1 shows a simplified block diagram of all themodels. The 4/20mA input current flows throughresistor R1 and forward biased diode D1. Thevoltage developed across D1, which is relativelyconstant, is multiplied by a switch mode powersupply and used to power the instrument. Thevoltage developed across R1, which is proportionalto the 4/20mA input current, provides the inputsignal for the analogue to digital converter.Each time a 4/20mA current is applied to theinstrument, initialisation is performed during whichall segments of the display are activated, after fiveseconds the instrument displays the input currentusing the calibration information stored in theinstrument memory. If the loop current is too lowto power the instrument the indicator will displaythe error message ‘LPLo’.BA328E 5 digits 29mm high 144 x 72mmand bargraph.This instruction manual supplements theinstruction sheet supplied with each instrument.The main application of all the models is to displaya measured variable or control signal in ahazardous process area. The zero and span ofthe display are independently adjustable so thatthe indicator can be calibrated to display anyvariable represented by the 4/20mA current, e.g.temperature, flow, pressure or level.All the models have been certified intrinsically safefor use in gas and dust hazardous areas byNotified Body Intertek Testing and Certification Ltdand comply with the European ATEX Directive94/9/EC. The EC-Type Examination certificatespecifies that under fault conditions the outputvoltage, current and power at the 4/20mA inputterminals will not exceed those specified for simpleapparatus in Clause 5.7 of EN 60079-11, whichsimplifies installation and documentation.Fig 1 Indicator block diagramFor international applications all models haveIECEx certification which is described inAppendix 2.
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Page 5 and 6: 53.4 4/20mA inputThe input safety p
Page 7 and 8: 75. INSTALLATION5.1 LocationAll the
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Page 12 and 13: 126.4 Position of the decimal point
Page 14: 147. LINEARISERA sixteen segment, s
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Page 19: 199. ACCESSORIES9.1 Scale cardAll m
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Page 26 and 27: 26Appendix 1Dust certificationA1.0

BA307E, BA327E, BA308E & BA328E intrinsically safe ... - Ex-Baltic

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