EN
WIKA operating instructions models TGS55, TGS73 with 831 (Ex)
14327097.02 09/2019 EN/DE/FR/ES
13
3.9
Specifications and temperature limits
Case ingress protection (per IEC/EN 60529)
For information on the ingress protection of the respective instrument,
see chapter 9 “Specifications”. For the IECEx assessment, IP20 ingress
protection was assumed.
Permissible temperature range
For determining the maximum temperature at the instrument, besides
the medium temperature also other influences such as the ambient
temperature and, if applicable, the solar irradiation must be taken into
account.
Gas hazardous area
Required temperature class
(ignition temperature)
Permissible temperature range
at the instrument
T6
-20 ... +60 °C
T5 ... T1
-20 ... +70 °C
Dust hazardous area
Maximum surface temperature Permissible temperature range
at the instrument
T135 °C
-20 ... +60 °C (+70 °C optional)
T95 °C
-20 ... +60 °C (+70 °C optional)
The installation should be made in such a way that the temperature
range of the instrument, also considering the effects of convection and
thermal radiation, neither exceeds nor falls below the permissible limits.
The permissible temperature ranges of the contact models must not be
exceeded at the instrument either. If necessary, measures for cooling
(e.g. insulation of the measuring point, thermowell, etc.) must be taken.
3. Safety
