WIKA NS 100 Mode D'emploi page 11

2. Safety
WARNING!
It is imperative that the application conditions and safety
requirements of the EU-type examination certificate are
followed.
Pressure gauges must be grounded via the process
▶
connection.
For use in ambient temperatures below the freezing point of
water, filled instruments are recommended. The case filling
prevents the formation of and freezing of condensation in the
case.
Permissible ambient temperature
Model 232, 262, PG23CP, PG28: -40 ... +60 °C
Model 233, 263, PG23CP, PG28: -20 ... +60 °C
Model PG23LT:
1) Option for model PG28
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 filling)
≤ 200 °C (unfilled)
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.
WIKA operating instructions pressure gauge, model 2 per ATEX
(unfilled)
(glycerine filling)
-40 ... +60 °C (silicone oil filling)
-70 ... +60 °C (silicone oil filling)
1)
EN
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