Safety; Explanation Of Symbols; Intended Use; Responsibility Of The Operator - Wika Rtd Zusatzinformation

1. Ex marking / 2. Safety
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 3D Ex tc IIIC T80 °C Dc X
II 3D Ex tc IIIC T95 °C Dc X
II 3D Ex tc IIIC T440 °C Dc X
Observe the special conditions (see chapter 4 "Special conditions for use (X conditions)").

2. Safety

2.1 Explanation of symbols

DANGER!
... indicates a potentially dangerous situation in the hazardous area that can
result in serious injury or death, if not avoided.

2.2 Intended use

The thermometers described here are suitable for temperature measurement in zone 2 or
22 hazardous areas.
The non-observance of the instructions for use in hazardous areas can lead to the loss
of the explosion protection. Adhere to the following limit values and instructions (see data
sheet).

2.3 Responsibility of the operator

The responsibility for classification of zones lies with the plant operator and not the
manufacturer/supplier of the equipment.
WIKA additional information RTD and TC, non-incendive equipment (Ex n)
Ambient temperature
range (T )
a
-20 ... +55 °C
-20 ... +70 °C
-20 ... +80 °C
Max. surface temperature
(T ) at the sensor or
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)").
EN
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