Special Conditions Of Use (X Conditions) - WIKA TR Serie Información Adicional

4. Special conditions of use (X conditions)

4. Special conditions of use (X conditions)
1) The alternatively used enclosures, optionally suitable transmitters or suitable digital
displays shall be provided with their own certification in accordance with EN 60079-0,
EN 60079-7 and EN 60079-31. The installation conditions, the electrical connection
values, the temperature class respectively the maximum surface temperatures of
devices for the use in explosive dust atmospheres and the permissible ambient
temperature shall be taken from the corresponding certification and shall be
considered.
2) Other blanking elements as well as cable glands, if used, have to separately assessed
and certified in accordance with EN 60079-7 and EN 60079-31. In the end-use
application the degree of protection min. IP54/IP6x shall be maintained in accordance
with EN 60079-0 and in compliance with EN 60529.
3) The temperature resistance of the connecting cables, the connection heads, the
cable entries and if necessary the blanking connectors shall be at least as high as
the maximum permissible ambient temperature and shall be at least as low as the
minimum permissible ambient temperature.
4) A reverse heat flow from the process exceeding the permissible ambient temperature
of the transmitter, the digital display or the enclosure is not allowed and shall be
avoided by a suitable thermal insulation or a suitable neck length of the tubing.
5) The cable sensors shall be fitted with kink protection and strain relief. They must be
connected to ground through their installation. For tube type cable probes (without
MI cable), the temperature range of the wire insulation shall be considered for
operating.
6) The ambient temperature range depending on temperature class respectively surface
temperature is to be taken from the operating instructions.
7) For the use in areas that require EPL Gc: Measures external to the equipment shall
be taken so that the transient protection device can be set to a value, which does not
exceed 140 % of the rating at the equipment's power connections.
8) For the use in areas that require EPL Gc: The thermometer model TRxx (resistance
sensor) respectively model TCxx (thermocouple element) have to be erected in such a
way that a pollution degree 2 or less, according to IEC/EN 60664-1, is achieved.
WIKA additional information, models TRxx and TCxx (Ex nA, Ex ec, Ex eb, Ex tc, Ex tb)
EN
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