WIKA TC12-M - Handbuch (Seite 14)

GB
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
T4
T3
T1
T
undefined
T4: (-50) -40 °C < T
a
< +85 °C
T3: (-50) -40 °C < T
a
< +150 °C
T1: (-50) -40 °C < T
a
< +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 fitted with a certified enclosure in which the terminal block is fitted. 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 certified enclosure, in which an electronic assembly has
been fitted. 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 fitted to certified 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.