Use In Hazardous Zones; Ex-Classification Atex; Introduction; Rated Data - Mettler Toledo InPro 7250 Series Bedienungsanleitung

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2.4

Use in hazardous zones

For an installation in hazardous zones please read the
guidelines following hereafter:

Ex-classification ATEX:

II 1/2G Ex ia IIC T6/T5/T4/T3 Ga/Gb
Number of the test certificate:
SEV 15 ATEX 0123
IECEx SEV 15.0011X
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
equipment group II, category 1/2G which can be used
in zone 0/1 or 1/2 or 1 or 2 as well as gas groups IIA,
IIB and IIC, which are potentially explosive due to com-
bustible substances in the temperature classes T3 to T6.
For use/ installation, the requirement of
EN/IEC 60079-14 must be observed.
The conductivity measuring circuit and temperature
measuring circuit are part of a common intrinsically safe
system and are for operation connected to a separately
certified transmitter.
The conductivity measuring circuit and temperature
measuring circuit as part of an intrinsically safe system
are isolated from conductive housing parts up to a
maximum rated voltage of 30 V.
The sensors can be installed with different process
adapters (flange, threaded bushes) permanently in pipes
or tanks.
2.5.2

Rated data

Conductivity measuring circuit, and temperature meas-
uring circuit1:
In type of protection intrinsic safe Ex ia IIC, only for
connection to a certified intrinsically safe circuit.
Maximum values:
U
L
C
The above values are each the total of all individual cir-
cuits of the associated intrinsically safe power supply
and transmitter.
© 04/2017 Mettler-Toledo GmbH
Printed in Switzerland
≤ 16 V, I ≤ 150 mA, P
i i
= 0 (the internal inductance is ineffective towards the
i
outside)
= 900 pF (effective internal capacitance)
i
InPro 7250 Series
≤ 155 mW
i
CH - 8606 Greifensee
52 002 799