WIKA R5502 Mode D'emploi page 12

5. Special conditions for use (X conditions)
5) Avoid handling of materials that react dangerously with the materials
used for the instrument, and substances liable to spontaneous
combustion.
EN
6) Avoidance of vibration
Requirements for the installation point
If the line to the instrument is not adequately stable, an instrument
holder should be used for fastening. If vibrations cannot be avoided
by means of suitable installation, use instruments with liquid filling.
Protect the instruments against coarse dirt and wide fluctuations in
ambient temperature.
Permissible vibration load at the installation site
Always install the instruments in locations free from vibration. If
necessary, it is possible to isolate the instrument from the mounting
point, e.g. by installing a flexible connection line between the
measuring point and the instrument and mounting the instrument on
a suitable bracket. If this is not possible, do not exceed the following
limits:
Frequency range < 150 Hz
Acceleration < 0.5 g
7) When using thermowells, they must be filled with a thermal contact
medium in order to reduce the heat transfer resistance between
the outer wall of the probe and the inner wall of the thermowell. The
working temperature of the thermal compound is -40 ... +200 °C.
8) Clean the thermometer with a moist cloth. Ensure that due to the
cleaning no electrostatic charge will be generated.
12 WIKA operating instructions models 53, 54, 55 (ATEX)