Selection Of Components - HBM PACEline CMD600 Bedienungsanleitung

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The measurement error caused by the bending moment is low, as the higher
material stresses on the one side of the crystal are compensated for by the
lower stress on the other side.
If a piezoelectric force ring (1−CFW/50kN) is loaded with a bending moment
of 100 Nm, this produces an output signal of −2.3N.
Please note the maximum lateral force as per data sheet.
11.6

Selection of components

A piezoelectric measurement chain consists of the actual transducer, charge
amplifier and the connection cable between the components.
If the maximum force to be measured is known, a suitable charge amplifier
can be selected.
The transducer can be designed according to the maximum overload and
geometric requirements as the output signal is not dependent on the nominal
load.
Examples:
A. Force transducer
• A maximum force of 100 kN must be measured
• Selection of a force sensor with full scale value 120 kN (e.g. CFT/120 kN)
• Transducer sensitivity: −4.0 pC/N (enter in the CMD600 Assistant field:
Sensor sensitivity)
• Selected measuring range: 100 kN (enter in the CMD600 Assistant field:
Physical input range)
• Input range = 400,000 pC (is calculated automatically and set in the
CMD600)
• Output voltage at the charge amplifier = + 10 V at 100 kN
CMD600
A2781−2.1 en/de/fr