Safety; Explanation Of Symbols; Intended Use - WIKA TR Serie Instructions Complémentaires

1. Ex marking / 2. Safety
1.1 Instrument use in different explosion protection zones (EPL)
For applications that require an EPL Gb, instruments with an EPL Ga can also be used.
If an instrument with EPL Ga is used in an application that requires EPL Gb, then the
instrument may not be re-used in an application that requires EPL Ga.
EN
For applications that require an EPL Gc, instruments with an EPL Ga or Gb can also be
used. If an instrument with EPL Ga or Gb is used in an application that requires EPL Gc,
then the instrument may not be re-used in an application that requires EPL Ga or Gb.
1.2 "Quasi grounded" sensor
Versions with Ø 3 mm with 2 x 4-wire, Ø < 3 mm or "grounded" versions do not conform to
section 6.3.13, IEC/EN 60079-11 and are identified as "quasi grounded"
Observe the special conditions (see chapter 4 "Special conditions for safe use
(X conditions)", point 1).
1.3 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.

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).
Sensors with connectors
For versions with connector, Ex i, dust the following applies: Position of the connector only
permissible outside the hazardous area.
6 WIKA additional information, models TRxx and TCxx (Ex i)
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