EN
14302224.0
1
01/2023
EN/DE
Additional operating instructions TC82, TC83, intrinsically safe designs (Ex i)
17
4.1 Overview of temperature zones and safety-related instructions for the different
variants
4.1.1 Variant 1
The thermometer (module) model TC82-M or TC83-M is fitted to a suitable enclosure.
Terminals are mounted inside the enclosure.
Marking: II 2/-G Ex ia IIC T* Gb/- or additionally with II 2/-D Ex ia IIIC T135 °C Db/-
The enclosure is in zone 1 (zone 21) or zone 2 (zone 22). The sensor is located in a non Ex
zone.
A heating in the enclosure does not occur with variant 1. However, an impermissible heat
backflow from the process which can exceed the operating temperature of the enclosure
or the temperature class, must be prevented through suitable heat insulation or a suitably
long neck tube.
4.1.2 Variant 2
The thermometer (module) model TC82-M or TC83-M is fitted to a suitable enclosure.
Electronic equipment is mounted inside the enclosure.
Marking: II 2/-G Ex ia IIC T* Gb/- or additionally with II 2/-D Ex ia IIIC T* Db/-
The enclosure is in zone 1 (zone 21) or zone 2 (zone 22). The sensor is located in a non Ex
zone.
14387940.01
TC82
TC83
Zone 1
Model TC82
Model TC83
Zone 1
T > 400 °C:
Non-Ex area
T > 400 °C:
Non-Ex area
4. Special conditions for use (X conditions)
