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Idiomas disponibles
Idiomas disponibles
1. Ex marking / 2. Safety
1.2.2 For applications that require EPL Db or Dc equipment
For applications without transmitter (digital displays) requiring instruments of group III, the
following surface temperatures and ambient temperature ranges apply:
Table 4: Surface temperature dust applications (IECEx certificate)
Marking
Ex tb IIIC TX °C Db
Ex tc IIIC TX °C Dc
Note: Electronics is only allowed for Dc (tc).
For the installation of a transmitter and/or a digital display the special conditions for safe
use shall be considered.
1) Temperature range -40 °C to maximum +80 °C for standard variants. Extended temperature ranges are possible for
special models. These models are manufactured with special components, i.e. suitable casting compound, cases and
cable glands for extended temperature ranges.
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 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 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, 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
Maximum surface
temperature (T
) at the tip
max
of the probe or thermowell
T
(medium temperature)
M
+ self-heating 4 K
EN
7
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