Safety; Explanation Of Symbols; Intended Use - WIKA TR12 Serie Manual De Instrucciones

1. Ex marking / 2. Safety
Use in methane atmospheres
Due to the higher minimum ignition current of methane, the instruments can also be used
where methane causes a potentially explosive gas atmosphere. The instrument can
optionally be marked with IIC + CH
EN
For applications that require EPL Gb or Db, the instruments marked with "ia" can also be
used in type "ib" measuring circuits.

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 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.
2.4 Personnel qualification
The skilled electrical personnel must have knowledge of ignition protection types,
regulations and provisions for equipment in hazardous areas.
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WIKA additional information TR12/TC12, intrinsically safe designs (Ex i)