WIKA 632.50 Serie Betriebsanleitung Seite 11

2. Safety
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.
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
temperature, besides the medium temperature also other influences
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.
Potentially explosive gas atmosphere
Required
temperature
class (ignition
temperature of
gas or vapour)
T6 (T > 85 °C)
T5 (T > 100 °C)
T4 (T > 135 °C)
T3 (T > 200 °C)
T2 (T > 300 °C)
T1 (T > 450 °C)
Operating instructions capsule pressure gauge, model 63x.50 per ATEX
Maximum permissible surface temperature
of the instrument (for the end application)
Model 632.50
(unfilled
instruments)
+65 °C
+80 °C
+105 °C
+160 °C
+200 °C
+200 °C
Model 633.50, NS 63
and NS 100 (filled
instruments)
+65 °C
+80 °C
+100 °C
+100 °C
+100 °C
+100 °C
EN
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