WIKA TGT70 - Manual (Page 11)

14047194.02 02/2013 GB/D/F/E
WIKA operating instructions model TGT70 11
GB
WARNING!
Before storing the instrument (following operation), remove any residual media.
This is of particular importance if the medium is hazardous to health, e.g.
caustic, toxic, carcinogenic, radioactive, etc.
6. Commissioning, operation
WARNING!
■ Only work on the gauge with the voltage disconnected.
■ Avoid strong vibrations and mechanical impacts during operation of the
instrument.
■ Avoid soiling and strong fluctuations of the ambient temperature.
■ Cutting through the measuring line will destroy the instrument and thus lead
to a wrong electrical output signal.
■ Cutting through the capillary will destroy the instrument and lead to the
leakage of the thermometric liquid (Xylol, Syltherm or silicone oil).
6.1 Installation conditions
Before mounting the sensor, check whether the sensor material used (specified in the
delivery note) is chemically resistant/neutral to the medium being measured. This also
applies to thermowells.
The working pressure at the thermowell stem is permitted up to a maximum of 25 bar
(static).
Make sure that the suitable accessories required for fastening the case of the instrument
into the panel are available. The accessories are either fitted or located in a bag fastened to
the thermometer.
■ Expose, if possible, the entire length of the stem to the temperature to be measured.
However, at least the length of the active part that corresponds to the length of the
expansion vessel (active length).
■ The temperature probe in pipelines or other measuring points must be angled as far
towards the flow as possible.
■ When using thermowells, please observe that the stem must not touch the bottom of the
thermowell.
■ Protect capillaries against bending. The smallest bending radius of the capillary should
not be less than 6 mm. Any bending or discontinuities of the capillary may result in the
failure of the instrument.
5. Transport, packaging and storage / 6. Commissioning ...