Wika TC12-M Instrukcja Użytkownika Pobierz pdf (Strona 14)

4. Design and function

14083458.01 09/2013 GB/D

WIKA operating instructions models TR12, TC12 (Ex i)14

4.2 Technical description of the three variants

TR12-B, TC12-B

Variant 1

TR12-B, TC12-B

Variant 2

TR12-B, TC12-B

Variant 3

Thread

TR12-M, TC12-M

Module

Thread

Thread Thread Thread

undened

T4: (-50) -40 °C < T

< +85 °C

T3: (-50) -40 °C < T

< +150 °C

T1: (-50) -40 °C < T

< +300 °C

Legend:



Connection head



Neck tube



Connection to thermowell



Measuring insert



Terminal block



Transmitter (option)



Field transmitters

14039769.01

Variant 1:

The thermometer is tted with a certied enclosure in which the terminal block is tted. If the

thermometer is marked with II 2G Ex ia IIC T1-T6 Gb, then it is designed for use in zone 1.

If the thermometer is marked with II 1/2 G Ex ia IIC T1-T6 Ga/Gb, then it is designed for use

with a thermowell at the partition to zone 0.

Variant 2:

The thermometer is built into a certied enclosure, in which an electronic assembly has

been tted. If the thermometer is marked with II 2G Ex ia IIC T1-T6 Gb, then it is designed

for use in zone 1. If the thermometer is marked with II 1/2 G Ex ia IIC T1-T6 Ga/Gb, then it is

designed for use at the partition to zone 0 with a thermowell.

Variant 3:

The thermometer is tted to certied equipment (transmitter). The thermometer is marked

with II 2 G Ex ia IIC Tx Gb and is designed for use in zone 1 with a thermowell. For any

potential usage at the partition to zone 0 with a thermowell, the approvals and conditions of

the relevant transmitter must be considered.

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