EN
WIKA operating instructions pressure gauge, model 2 per ATEX 11
14375375.01 12/2019 EN/DE
Permissible ambient temperature
Model 232/262/PG23CP:-40 ... +60 °C (unlled)
Model 233/263/PG23CP:-20 ... +60 °C (glycerine lling)
-40 ... +60 °C (silicone oil lling)
Model PG23LT: -70 ... +60 °C (silicone oil lling)
Attention! With gaseous media, the temperature may increase as a
result of compression warming. In these cases it may be necessary to
throttle the rate of change of pressure or reduce the permissible medium
temperature.
Permissible medium temperature
≤ 100 °C (with case lling)
≤ 200 °C (unlled)
The permissible medium temperature does not only depend on the
instrument design, but also on the ignition temperature of the surround-
ing gases, vapours or dusts. Both aspects have to be taken into account.
Maximum surface temperature
The surface temperature of the instruments mainly depends on the
medium temperature of the application. The instrument itself does not
contain any heat sources. For determining the maximum surface temper-
ature, besides the medium temperature also other inuences such as
the ambient temperature and, if applicable, the solar irradiation must
be taken into account. For prevention, consider the maximum medium
temperature as maximum surface temperature, if it is not possible to
determine the real surface temperature even in the case of expected
malfunctions. For prevention, consider the maximum medium tempera-
ture as maximum surface temperature, if it is not possible to determine
the real surface temperature even in the case of expected malfunctions.
2. Safety
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