Mechanical Influences - HBM CMA Series Operating Manual

Tips regarding piezoelectric measurement technology
Both the drift and the disturbance variable temperature are important in the
case of long measurement times and small forces - the information must be
specifically taken into account.
9.5

Mechanical influences

In piezoelectric force sensors, the crystal lies in the direct force flow. The
measuring elements (quartz or gallium phosphate) are designed for each
sensor at the maximum occurring normal force. Applied bending moments can
lead to a overload of the transducer as the crystal is more strongly loaded on
one side and, in contrast, the load is relieved on the other side.
The maximum mechanical stress is calculated from the addition of the stresses
caused by the bending moment in the crystal and the load stresses of the axial
forces to be measured. The maximum permitted surface pressure must not be
exceeded under any circumstances.
CMA 35
A02559_04_YI0_01 HBM: public