JUMO exTHERM-DR, Руководство по эксплуатации

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6 ATEX ignition protection type "i" 39
As described above, 10 °C must be subtracted in temperature classes T1 and T2 and 5 °C in temperature classes T3 to T6.
Example:
A thermocouple is to be used in the temperature class T4 (maximum temperature 135 °C, limit is to be reduced by 5 K for safe-
ty);
T
s
Maximum admissible temperature at the probe head
T
s
= 130 °C - 0.9 °C
T
s
= 129.1 °C
The maximum temperature (measuring or medium temperature) at the probe head must therefore not exceed a value of
129.1 °C.
The following table provides a summary of the calculations for all temperature classes:
Table 2:
Medium and ambient temperature for applications
that require category 2 devices Medium and ambient temperature for applications that
require category 1 devices
Sensor with PT100 Sensor with thermocouple Sensor with PT100 Sensor with thermocouple
T1 439.1 °C 432.5 °C 349.1 °C 342.5 °C
T2 289.1 °C 282.5 °C 229.1 °C 222.5 °C
T3 194.1 °C 187.5 °C 154.1 °C 147.5 °C
T4 129.1 °C 122.5 °C 102.1 °C 95.5 °C
T5 94.1 °C 87.5 °C 74.1 °C 67.5 °C
T6 79.1 °C 72.5 °C 62.1 °C 55.5 °C