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

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26Appendix 1Dust certificationA1.0 ATEX dust certificationIn addition to ATEX certification permittinginstallation in explosive gas atmospheres which isdescribed in the main section of this instructionmanual, all BA307E, BA327E, BA308E andBA328E indicators have ATEX certificationpermitting installation in combustible dustatmospheres.This appendix describes ATEX installations inexplosive dust atmospheres conforming withEN 60079-14 Electrical installations design,selection and erection. When designing systemsfor installation outside the UK the local Code ofPractice should be consulted.The indicator’s dust input and output safetyparameters are identical to gas parameters, so allthe electrical circuits shown in the main section ofthis manual may also be used for dustapplications.A1.1 Zones, and Maximum SurfaceTemperatureThe BA307E, BA327E, BA308E and the BA328Ehave been ATEX certified as Group II, Category1D Ex ia IIIC T80ºC Da IP20 apparatus, Ta -40 to70°C.When connected to a suitable system theindicators may be installed in:Zone 20Zone 21Zone 22explosive atmosphere in the form ofa cloud of combustible dust in air iscontinuously present, or for longperiods or frequently.explosive atmosphere in the form ofa cloud of combustible dust in air islikely to occur occasionally in normaloperation.explosive atmosphere in the form ofa cloud of combustible dust in air isnot likely to occur in normaloperation, but if it does occur, willonly persist for a short period.Be used with dust in subdivisions:Having a Minimum Ignition Temperature of:Dust cloud 120°CDust layer on indicatorup to 5mm thick155 ° CDust layer on indicator Refer toover 5mm thick. EN 60079-14At an ambient temperature between -40 and +70°CA1.3 MaintenanceENSURE PLANT SAFETY BEFORESTARTING MAINTENANCELive maintenance is permitted onintrinsically safe equipment installed in ahazardous area, but only certified testequipment should be used.All models have IP66 front of panel protection anda gasket is provided to seal the joint between theinstrument and the mounting panel thus preventingdust ingress from the outside of the mountingpanel. The rear of the instruments is not sealed,but ATEX dust certification is dependent on theinternal conformal coating of the instrument, sodust ingress is acceptable except for use in IIICconductive dusts – see A1.4. However, it is goodpractice to minimise the amount of dustaccumulating on the rear of the instrument.A1.4 Special conditions for use in IIIC dustsThe ATEX certificate for the loop poweredindicators has an ‘X’ suffix indicating that specialconditions for safe use are required for installion inIIIC dust atmospheres, the certificate states:‘For use in Group IIIC conductive gasatmospheres, the indicator shall bemounted such that the instrumentterminals have at least IP6X protection.’To prevent the indicator terminals becomingcontaminated by conductive dust:The indicator must be installed in a panel,cubicle or enclosure providing a minimum ofIP6X protection.IIIAIIIBIIICcombustible flyingsnon-conductive dustconductive dust(For use with IIIC conductive dustsspecial conditions for safe use apply– see section A1.4)The gasket supplied to seal the jointbetween the indicator and the mountingpanel must be used, and the 144 x 72mmBA308E and BA328E indicators must besecured with four panel mounting clamps.Note: These special installation conditions onlyapply for indicators exposed to IIIC conductive dustatmospheres.
27Appendix 2IECEx certificationA2.0 The IECEx Certification SchemeIECEx is a global certification scheme forexplosion protected products which aims toharmonise international certification standards.For additional information about the IECExcertification scheme and to view the BEKAassociate certificates, please visit www.iecex.comA2.1 IECEx Certificate of ConformityThe BA307E, BA327E, BA308E and the BA328Eloop powered indicators and the optionalaccessories have been issued with an IECExCertificate of Conformity numberIECEx ITS 11.0015X which specifies the followingcertification codes:Ex ia IIC T5 GaEx ia IIIC T80ºC DaTa = -40ºC to 70ºCThe specified gas and dust intrinsic safetyparameters are identical to the ATEX safetyparameters described in this manual.A2.3 Special conditions for use in IIIC dustsThe IECEx certificate for the loop poweredindicators has an ‘X’ suffix indicating that specialconditions for safe use are required for installion inIIIC dust atmospheres, the certificate states:‘For use in Group IIIC conductive gasatmospheres, the indicator shall bemounted such that the instrumentterminals have at least IP6X protection.’To prevent the indicator terminals becomingcontaminated by conductive dust:The indicator must be installed in a panel,cubicle or enclosure providing a minimum ofIP6X protection.The gasket supplied to seal the jointbetween the indicator and the mountingpanel must be used, and the 144 x 72mmBA308E and BA328E indicators must besecured with four panel mounting clamps.Note: These special installation conditions onlyapply for indicators exposed to IIIC conductive dustatmospheres.The IECEx certificate may be downloaded fromwww.beka.co.uk, www.iecex.com or requestedfrom the BEKA sales office.A2.2 InstallationThe IECEx and ATEX certificates specify identicalsafety parameters and installation requirements forboth approvals as defined by IEC / EN 60079-14.The ATEX gas and dust installation requirementsspecified in section 5 and Appendix 1 of thismanual may therefore be used for IECExinstallations, but the local code of practice shouldalso be consulted.
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Page 3 and 4: 31. DESCRIPTIONThese panel mounting
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BA307E, BA327E, BA308E & BA328E intrinsically safe ... - Ex-Baltic

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