HBM MGCplus - Current-Fed Piezoelectric Transducer

Measuring
Current-fed piezoelectric transducer
MGCplus A0534-30.0 HBM: public 179
7.4 Current-fed piezoelectric transducer
Piezoelectric transducers with a built-in preamplifier are often used for ac
celeration and force measurements. These transducers require a constant
current for supply. The measurement signal corresponds to the modulated
voltage on the power line. The DeltaTronT acceleration transducer from
Brüel&Kjaer is a typical representative of this product family.
To operate current-fed piezoelectric transducers you will need the AP418i
connection board and the ML810B amplifier. You can select coarse and fine
adjustment for the measuring range. 3 input ranges are available for coarse
adjustment: "0.05 V; "0.5 V; "5 V.
Example: If the required measuring range is 4 V, the next larger input range
"5 V is set.
The zero point defines the 0 V voltage generated at the output of the ampli
fier. The nominal (rated) value is always defined relative to the zero point.
The settings are explained with the following example:
A DeltaTronT transducer will be used to measure an acceleration of up to
300m/s
2
. The nominal (rated) value of the transducer is 1mV/ m/s
2
.
Measuring range (fine adjustment) 300 m/s
2
x 1 mV/m/s
2
= 0.3 V
Input range (coarse adjustment): "0.5 V ( > 0.3 V)