Mounting The Probe - WIKA SB15 Mode D'emploi

5. Commissioning, operation

5.1 Mounting the probe

Before mounting the probe, check whether the probe material used (specified in the
delivery note) is chemically resistant/neutral to the medium being measured. This also
applies to thermowells.
EN
If possible, the entire length of the stem should be exposed to the temperature being
measured.
In pipelines or other measuring points, the temperature probe 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.
Errors in thermal conduction occur if the area where the temperature is to be measured is
so small, that the mass of the temperature probe acts as thermal capacity. Errors in thermal
conduction may also occur if the immersion depth is insufficient, if the mounting fittings are
connected to a good thermal conductor (metal plate or similar) and there is a considerable
difference in temperature between the measuring and mounting element temperatures.
5.2 Mounting instructions for measuring line
The smallest bending radius of the measuring line should not be less than 6 mm. Bending
or interruption of the measuring line lead to failure of the instrument.
If there are shocks or vibrations at the installation site of the probe, form several freely
swinging loops between the last fixing point and the probe. Any excess length must also be
coiled, since cutting the measuring line would render the instrument unserviceable.
Avoid welding or soldering and permanent fastening of the measuring line as this could
seriously damage the measuring line and impair the operation of the instrument.
The measuring line should not be installed close to cold or heat sources.
5.3 Case mounting
The case ingress protection is indicated on the product label and must be observed during
installation.
If possible, mount the indicator case at a shock- and vibration-free location, but observe at
least the following limit values:
Frequency range < 150 Hz
Acceleration < 0.7 g (7 m/s )
2
A flexible connection line between the measuring point and thermometer can be used to
isolate the installation from the measuring point.
WIKA operating instructions models SB15, SW15 13