WIKA TR31-3 Betriebsanleitung Seite 36

10. Information on mounting and operation in ...
For applications with transmitters (TR31-x-x-TT) that require Group II
instruments (potentially explosive gas atmospheres), the following
temperature class classification and ambient temperature ranges apply:
EN
Table 3
Hazardous gas
atmosphere
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 4
Hazardous dust
atmosphere
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
For applications that require EPL Gb or Db, the instruments designated
as "ia" can also be used in type "ib" measuring circuits, with the same
connection parameters.
36
Temperature Ambient
class temperature
range (T
T6 -40 ... +45 °C
T5 -40 ... +60 °C
T4 -40 ... +85 °C
T3 -40 ... +85 °C
T2 -40 ... +85 °C
T1 -40 ... +85 °C
Power P Ambient
i
temperature
range (T
750 mW -40 ... +40 °C
650 mW -40 ... +70 °C
550 mW -40 ... +85 °C
WIKA operating instructions models TR31-3, TR31-K (Ex i)
Max. surface temperature
(T ) at the sensor or
max
) thermowell tip
a
T (medium temperature) +
M
self-heating (15 K)
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 (15 K)
Pay attention to the
specific conditions for safe
use (see chapter 10.1.1
"Special conditions of use
(X conditions)".