WIKA 532.51.100 Mode D'emploi page 6

3. Technical data and intended use
Operating Temperature
Ambient:
GB
Medium:
Attention! In the case of gaseous substances, the temperature may increase
due to compression warming. In these cases it may be necessary to throttle
the rate of change of pressure or reduce the permissible temperature of the
pressure medium.
Table 1: Permissible medium temperature
Temperature Class of the ambient
atmosphere (ignition temperature)
T 6 (85 °C < T ≤ 100 °C)
T 5 (100 °C < T ≤ 135 °C)
T 4 (135 °C < T ≤ 200 °C)
T 3 (200 °C < T ≤ 300 °C)
T 2 (300 °C < T ≤ 450 °C)
T 1 (T > 450 °C)
1) The higher values apply only to special versions with higher permissible medium temperatures.
Materials
Wetted parts:
Movement:
Dial and pointer:
6
-20 ... +60 °C
with option silicone oil filling: -40 ... +60 °C
The permissible medium temperature does not only depend on the
instrument design, but also on the ignition temperature of the
surrounding explosive atmosphere. Both aspects must be taken
into account.
For maximum permissible medium temperatures see Table 1.
Process connection and pressure chamber
stainless steel
Pressure element
≤ 0.4 bar: stainless steel
> 0.4 bar: NiCrCo-alloy (Duratherm)
Stainless steel
Aluminium
WIKA Operating Instructions pressure gauges Model 5 per ATEX
Maximum permissible medium
temperature (in the pressure system)
+70 °C
+85 °C
+100 °C or +120 °C
+100 °C or +185 °C
+100 °C or +200 °C
+100 °C or +200 °C
1)
1)
1)
1)