UseInHazardousZones; Ex-ClassificationAtex; Introduction; RatedData - Mettler Toledo InPro 7250-Serie Bedienungsanleitung

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8 InPro
2.4 Use in hazardous zones
Foraninstallationinhazardouszonespleasereadthe
guidelinesfollowinghereafter:
Ex-classification ATEX:
II1/2GExiaIICT6/T5/T4/T3Ga/Gb
Number of the test certificate:
SEV15ATEX0123
IECExSEV15.0011X
2.5 Ex-classification ATEX
2.5.1

Introduction

According to Directive 94/9/EC (ATEX 95) Appendix I,
InPro 725X/*/*/* conductivity sensors are devices of
equipmentgroupII,category1/2Gwhichcanbeused
inzone0/1or1/2or1or2aswellasgasgroupsIIA,
IIBandIIC,whicharepotentiallyexplosiveduetocom-
bustiblesubstancesinthetemperatureclassesT3toT6.
Foruse/installation,therequirementof
EN/IEC60079-14mustbeobserved.
The conductivity measuring circuit and temperature
measuringcircuitarepartofacommonintrinsicallysafe
systemandareforoperationconnectedtoaseparately
certifiedtransmitter.
The conductivity measuring circuit and temperature
measuringcircuitaspartofanintrinsicallysafesystem
are isolated from conductive housing parts up to a
maximumratedvoltageof30V.
The sensors can be installed with different process
adapters(flange,threadedbushes)permanentlyinpipes
ortanks.
2.5.2 Rated data
Conductivitymeasuringcircuit,andtemperaturemeas-
uringcircuit1:
IntypeofprotectionintrinsicsafeExiaIIC,onlyfor
connectiontoacertifiedintrinsicallysafecircuit.
Maximumvalues:
U ≤16V,I
i
L = 0(theinternalinductanceisineffectivetowardsthe
i
outside)
C = 900pF(effectiveinternalcapacitance)
i
Theabovevaluesareeachthetotalofallindividualcir-
cuits of the associated intrinsically safe power supply
andtransmitter.
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≤150mA,P ≤155mW
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