WIKA 632.50.100 Mode D'emploi page 6

2. Safety
2.3 Safety instructions for pressure gauges per ATEX
GB
Technical data
Operating temperature
Ambient: -20 ... +60 °C (optional: -40 ... +60 °C)
Medium: The permissible medium temperature does not only depend on the
instrument design, but also on the ignition temperature of the surroun-
ding gases, vapours or dust. Both aspects have to be taken into account.
For permissible maximum medium temperatures see table 1.
Attention! With gaseous substances, the temperature may increase as a result
of compression warming. In such cases the rate of change of pressure must be
slowed down or the permissible medium temperature must be reduced.
Table 1: Permissible medium temperature
Temperature class of the
ambient atmosphere
(ignition temperature)
T 6 (> 85 °C)
T 5 (> 100 °C)
T 4 (> 135 °C)
T 3 (> 200 °C)
T 2 (> 300 °C)
T 1 (> 450 °C)
6
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 EC-type examination certificate are
followed.
Pressure gauges must be earthed via the process connection!
Maximum permissible medium temperature
(in the measuring system)
+70 °C
+80 °C
+80 °C
+80 °C
+80 °C
+80 °C
WIKA operating instructions pressure gauge model 6 per ATEX