Information About The Charge Amplifier And Electrical Connection - HBM CMA Series Operating Manual

Tips regarding piezoelectric measurement technology
2. Selecting the charge amplifier.
The CMA charge amplifiers are available with various measuring ranges.
The measuring range should be selected so as to obtain an optimal
resolution.
3. Verification of the set parameters.
To complete the process, the measurement chain should be compared
again with the reference measurement chain.
9.3 Information about the charge amplifier and electrical
connection
The charge output by a piezoelectric sensor is converted into a directly
proportional voltage (Fig. 9.4).
Fig. 9.4 Principle circuit for a measurement chain with sensor, cable and charge
amplifier
Piezoelectric sensors are ideally suited for dynamic and non‐zero point‐related
measurements. The drift generated by piezoelectric measurement chains is so
low that it does not affect accuracy even with high requirements.
The drift is an effect of the limited insulation resistance of the cables and
charge amplifier. The transducers themselves do not display drift if mounting
and connection are implemented correctly. The maximum drift of a
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A02559_04_YI0_01 HBM: public
CMA