WIKA TR31-3 Betriebsanleitung Seite 35

10. Information on mounting and operation in ...
10.1.2 Ex designation, temperature class classification and
ambient temperatures
For applications without transmitters (models TR31-x-x-Px,
TR31-x-x-Sx) that require Group II instruments (potentially explosive gas
atmospheres), the following temperature class classification and ambient
temperature ranges apply:
Table 1
Marking
II 1 G Ex ia IIC
T1 - T6 Ga
II 1/2 G Ex ia IIC
T1 - T6 Ga/Gb
II 2 G Ex ia IIC
T1 - T6 Gb
For applications requiring instruments of equipment Group II (potentially
explosive dust atmospheres), the following surface temperatures and
ambient temperature ranges apply:
Table 2
Marking
II 1 D Ex ia IIIC
T135 °C Da
II 1/2 D Ex ia IIIC
T135 °C Da/Db
II 2 D Ex ia IIIC
T135 °C Db
WIKA operating instructions models TR31-3, TR31-K (Ex i)
Temperature Ambient
class temperature
range (T
T6 -50 ... +80 °C
T5 -50 ... +85 °C
T4 -50 ... +85 °C
T3 -50 ... +85 °C
T2 -50 ... +85 °C
T1 -50 ... +85 °C
Power P Ambient
i
temperature
range (T
750 mW -50 ... +40 °C
650 mW -50 ... +70 °C
550 mW -50 ... +85 °C
Max. surface temperature
(T ) at the sensor or
max
) thermowell tip
a
T (medium temperature) +
M
self-heating
Pay attention to the
specific conditions for safe
use (see chapter 10.1.1
"Special conditions of use
(X conditions)".
Max. surface temperature
(T ) at the sensor or
max
) thermowell tip
a
T (medium temperature) +
M
self-heating
Pay attention to the
specific conditions for safe
use (see chapter 10.1.1
"Special conditions of use
(X conditions)".
EN
35