RECKMANN R14 Series, Руководство по эксплуатации

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Ex-BA line sensor
31
Doc 141917 | Rev. 03 [Type codes of the models]
5.2.5
Special features of the thermal parameters with thermocouples
NOTE
Due to the special physical properties of thermocouples (Peltier/Thomson effect) there is practically no
self-heating at the measuring tip.
Therefore, for the type code TR14 from Table 10, with the calculation of the maximum process
temperature a total self-heating of 10K at power adjustment
(P
0
= ¼ x U
0
x I
0
= ¼ x 30 V x 0.1 A = 0.75 W) can be assumed.
Type code TR14-M*-*** at device protection level "Ga" and "Gb"
The following table shows the approved process temperature [°C] for all temperature classes with
power adjustment:
Temperature class P
i
= 750 mW
T1 (450°C) 430
T2 (300°C) 280
T3 (200°C) 185
T4 (135°C) 120
T5 (100°C) 85
T6 (85°C) 70
Tab. 16: TR14 – approved process temperatures
Type code TR14-M*-**** at device protection level "Da" and "Db"
NOTE
For operation in Zone 20 with type of protection II 1 G Ex ia IIIC T135°C Da the process temperature must
be set equal to the ambient temperature.
See the following overview:
Power P
i
ambient/process temperature
750 mW
-40°C to +40°C
650 mW -40°C to +70°C
550 mW -40°C to +100°C