Ex-Classification Atex; Introduction; Rated Data - Mettler Toledo O2 ISM Bedienungsanleitung

O ISM Qualification Kit
2
2.7

Ex-classification ATEX

2.7.1

Introduction

According to Directive 2014/34/EU (ATEX 95) Appendix l, oxygen
ISM sensor simulators are devices group ll, category 1/2G and
according to RL 99/92/EG (ATEX 137) may be used in zones 0/1
or 1/2 or 1 or 2 and gas groups llA, llB and llC that are potentially
explosive due to combustible substances in above stated tempera-
ture classes.
For use / installation, the requirements of EN 60079-14 must be
observed.
According to Directive 2014/34/EU (ATEX 95) Appendix l, oxygen
ISM sensor simulators are devices group ll, category 1/2D and ac-
cording to RL 99/92/EG (ATEX 137) may also be used in zones
20/21 or 21 or 22 that contain combustible dusts.
The digital sensor circuit is part of a common intrinsically safe sys-
tem and is for operation connected to a separately certified
transmitter.
The digital sensor circuit as part of an intrinsically safe system is
isolated from the not-intrinsically safe electric circuits up to a maxi-
mum rated voltage of 375 V and from grounded parts up to a
maximum rated voltage of 30 V.
2.7.2

Rated data

Measuring circuit:
Fail-safe ignition protection class Ex ia IIC only for connection to a
certified fail-safe circuit.
Digital O
Two-wire current circuit: U
© 12/18 Mettler-Toledo GmbH, Greifensee
Printed in Switzerland
oxygen sensor simulator maximum values:
2
≤16 V
≤ 30 mA
i
≤ 50 mW
I
i
P
i
L = negligible
i
C = negligible
i
O ISM Qualification Kit
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52 300 440 E
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