Mechanical Mounting - WIKA TR Serie Información Adicional

3. Commissioning, operation

3.1 Mechanical mounting

3.1.1 Multipoint assemblies
In this design, several, exchangeable (if required) thermocouples or resistance
thermometers are combined into a complete instrument so that measurements can be
carried out at different immersion depths. Multipoint assemblies are usually equipped with
a case in which transmitters or terminal blocks are mounted.
The transmitters/digital displays are fastened using a rail system in a case or holder in the
connection head and wired in accordance with IEC/EN 60079-7 and IEC/EN 60079-15.
Optionally, depending on design, the cases can be equipped with or without connection
terminals (e.g. terminal blocks, etc.) in accordance with IEC/EN 60079-7 and
IEC/EN 60079-15.
When using several transmitters/digital displays, a larger case is used in order to account
for the increased self-heating. This guarantees that the case surface temperature does not
increase significantly.
3.1.2 Cable probe
When using cable probes in conjunction with an additional case (with terminal blocks or
transmitters), the components used must correspond to the explosion protection of the
cable probe.
Observe the special conditions (see chapter 4 "Special conditions of use (X conditions)",
point 1 and 3).
3.2 Electrical mounting (zone 2 only)
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 EU-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 of use (X conditions)",
point 1 and 3).
WIKA additional information, models TRxx and TCxx (Ex nA, Ex ec, Ex eb, Ex tc, Ex tb)
EN
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