WIKA 7 Betriebsanleitung Seite 6

2. Safety
Skilled personnel
Skilled personnel are understood to be personnel who, based on their techni-
cal training, knowledge of measurement and control technology and on their
experience and knowledge of country-specific regulations, current standards
EN
and directives, are capable of carrying out the work described and independently
recognising potential hazards.
2.3 Safety instructions for pressure gauges per ATEX
Permissible ambient temperature
-20 ... +60 °C
-40 ... +60 °C
-70 ... +60 °C
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
≤ 150 °C (option)
≤ 200 °C (option)
The permissible medium temperature does not only depend on the instrument
design, but also on the ignition temperature of the surrounding gases, vapours or
dusts. Both aspects have to be taken into account.
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WARNING!
Non-observance of these instructions and their contents may result
in the loss of explosion protection.
WARNING!
It is imperative that the application conditions and safety require-
ments of the operating instructions are followed.
Instruments must be grounded via the process connection.
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(optional, only silicone oil filling)
(optional, for model 733.51 low-temperature version)
WIKA operating instructions pressure gauge model 7 per ATEX