Use In Methane Atmospheres; Safety; Explanation Of Symbols; Intended Use - WIKA RTD Zusatzinformation

1. Ex marking / 2. Safety
1.1 "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 of use (X conditions)",
EN
point 1).

1.2 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.
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.
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.

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.
6 WIKA additional information RTD and TC, intrinsically safe designs (Ex i)
.