WIKA TR Serie Información Adicional página 6

1. Ex marking
1.1.2 For applications that require EPL Db equipment
For applications without transmitter (digital displays) that require group III instruments, the
following surface temperatures and ambient temperature ranges apply:
Table 2: Surface temperature dust applications (EU type-examination certificate)
EN
Marking
II 2D Ex tb IIIC TX °C Db
II 3D Ex tc IIIC TX °C Dc
1.2 Marking according to IECEx certificate
1.2.1 For applications that require EPL Gb or Gc equipment
For applications without transmitter (digital displays) that require group II instruments, the
following temperature class classification and ambient temperature ranges apply:
Table 3: Temperature class gas applications (IECEx certificate)
Marking
Ex eb IIC T6 Gb
Ex ec IIC T6 Gc
Ex nA IIC T6 Gc
Ex eb IIC T5 ... T1 Gb
Ex ec IIC T5 ... T1 Gc
Ex nA IIC T5 ... T1 Gc
Note: Electronics is only allowed for Gc (ec/nA).
For the installation of a transmitter and/or a digital display the special conditions for safe
use shall be considered.
6 WIKA additional information, models TRxx and TCxx (Ex nA, Ex ec, Ex eb, Ex tc, Ex tb)
Ambient temperature
range (T )
a
-40 ... +80 °C
-60 ... +85 °C
Temperature Ambient
class temperature
range (T
T6 -40 ... +80 °C
-60 ... +80 °C
T5 ... T1 -40 ... +80 °C
-60 ... +85 °C
Maximum surface temperature
(T ) at the tip of the probe or
max
thermowell
T (medium temperature)
M
+ self-heating 4 K
Maximum surface
temperature (T
) the tip of the probe or
1)
a
thermowell
T (medium temperature)
M
+ self-heating 4 K
) at
max