WIKA TR12 Serie Manual De Instrucciones página 5

1. Ex marking
For applications without transmitters (digital displays) that require group II instruments
(potentially explosive gas atmospheres), the following temperature class classification and
ambient temperature ranges apply:
Table 1
Marking
ATEX IECEx
II 1G Ex ia IIC T1 ... T6 Ga
II 1/2G Ex ia IIC T1 ... T6
Ga/Gb
II 2G 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
ATEX IECEx
II 1D Ex ia IIIC T1 ... T6 Da
II 1/2D Ex ia IIIC T1 ... T6 Da/Db
II 2D Ex ia IIIC T1 ... T6 Db
II 1D Ex ia IIIC T1 ... T6 Da
II 1/2D Ex ia IIIC T1 ... T6 Da/Db
II 2D Ex ia IIIC T1 ... T6 Db
II 1D Ex ia IIIC T1 ... T6 Da
II 1/2D Ex ia IIIC T1 ... T6 Da/Db
II 2D Ex ia IIIC T1 ... T6 Db
When there is a built-in transmitter and/or a digital display, the special conditions from the
type examination certificate (see chapter 4 „Special conditions for use (X conditions)")
apply.
1) The values in brackets apply to special designs. These probes are manufactured using special sealing compounds.
Moreover, they feature cases made of stainless steel and cable glands for low-temperature ranges.
WIKA additional information TR12/TC12, intrinsically safe designs (Ex i)
Tempera- Ambient tempe-
ture class rature range (T
T1 ... T6 (-50) -40 ... +80 °C
1)
Power P Ambient tempe-
i
rature range (T
750 mW (-50)
1)
650 mW (-50)
1)
550 mW (-50)
1)
Max. surface temperature
) (T ) at the probe or
a max
thermowell tip
T (medium temperature) +
M
self-heating
For this, the special conditions
must be observed (see
chapter 4 „Special conditions
for use (X conditions)").
Max. surface temperature
) (T ) at the probe or
a max
thermowell tip
-40 ... +40 °C T (medium temperature) +
M
self-heating
For this, the special conditions
-40 ... +70 °C
must be observed (see
chapter 4 "Special conditions
for use (X conditions)").
-40 ... +80 °C
EN
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