WIKA PGT23.100 Mode D'emploi page 11

3. Safety
Gas hazardous areas
Required temperature class
(ignition temperature)
T6
T5
T4 ... T1
Dust hazardous areas
Maximum surface temperature
T85°C
T100°C
T135°C
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 must not be exceeded at the instrument either. If neces-
sary, measures for cooling (e.g. syphon, instrumentation valve) have to be taken.
Compliance with the permissible temperature range during operation must be ensured
by the operator. The area shown in the following picture under "T-Ref" can be used for this
purpose.
Pressure gauge
T-Ref
Pressure gauges with output signal, optionally for hazardous areas
Permissible temperature range at the instrument
-20 ... +45 °C
-20 ... +60 °C
-20 ... +60 °C (+70 °C optional)
Permissible temperature range at the instrument
-20 ... +45 °C
-20 ... +60 °C
-20 ... +60 °C (+70 °C optional)
Differential pressure gauge
T-Ref
EN
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