WIKA TR12 Serie Manual De Instrucciones página 13

3. Commissioning, operation
3.4.3 Variant 3
The thermometer is fitted to certified equipment (transmitter) with an ignition protection
type of "flameproof enclosure". The thermometer is marked with II 2G Ex db IIC Tx Gb and
is designed for use in zone 1 with a thermowell. For any potential usage at the partition to
zone 0 with a thermowell, the approvals and conditions of the relevant transmitters must be
considered.
▶
ATEX/IECEx Ex d certified temperature transmitters
The evaluation is carried out via a current (4 ... 20 mA), voltage (0 ... 10 V) or fieldbus
signal, which is generated by an ATEX/IECEx Ex d certified temperature transmitter.
Only field transmitters listed by name in the Appendix of the Ex d certificate may be used.
Use in zone 1, marking II 2G Ex db IIC Gb
The flameproof case or the connection head is in zone 1 (or zone 2). The sensor is in
zone 1. In the case of a separation of Ex zones, a thermowell (from corrosion-resistant
steel, min. wall thickness 1 mm) must be used.
The main marking for models TR12-B and TC12-B are found on the certified connection
housing or Ex d field transmitter. The TR12-M and TC12-M modules are marked through a
foil plate on the neck tube.
For a possible use at the partition to zone 0 with a thermowell, the approvals and
conditions of the relevant Ex d field transmitters must be followed.
3.5 Electrical mounting
Using a transmitter/digital display (option):
Observe the contents of the operating instructions for the transmitter/digital display (see
scope of delivery).
Built-in transmitters/digital displays have their own EC-type examination certificate. The
permissible ambient temperature ranges of built-in transmitters can be taken from the
corresponding transmitter approval.
Observe the special conditions (see chapter 4 "Special conditions for use (X conditions)",
point 5).
WIKA additional information TR12/TC12, flameproof enclosure (Ex d)
EN
13