Thermal Influences - HBM PACEline CMD600 Manuel D'emploi

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NOTE
The cleaning agent RMS1, which is used for cleaning SG installation points, is
not suitable for cleaning piezoelectric sensors.
11.4

Thermal influences

Influence of sensor temperature on the characteristic curve
The influence of temperature on the sensitivity of the sensors is, with
0.2% / 10K, very low and therefore negligible for most applications.
Temperature influences on signal stability
All piezoelectric sensors change their charge state when the temperature
changes as the pre-stress changes (E modulus of construction elements
depends on temperature).
In addition, temperature fluctuations during measurement lead to thermally
induced stresses that generate an output signal.
Note:
The output signal only changes in the case of a change in temperature, a
charge is not generated under stationary conditions.
The temperature effects can be minimized if it is ensured that
− The transducer is stored for sufficient time at the application temperature
− The transducer is not touched shortly before measurement as hand heat
can warm up the sensors unevenly
− A reset is implemented after every measurement cycle
Both the drift and the disturbance variable temperature gain in significance in
the case of long measurement times and small forces − the information here
must therefore be taken even more into account.
CMD600
A2781−2.1 en/de/fr