Measuring
Potentiometric transducers
186 A0534-30.0 HBM: public MGCplus
7.6 Potentiometric transducers
Potentiometric transducers are passive transducers that must be supplied
with an excitation voltage. To work with a potentiometric transducer you will
need the ML10B amplifier with AP01i or AP03i, or ML801B with 6i. Please
note that the maximum resistance value is 5 kΩ.
The settings are explained with the following example:
The measurement will be performed with a potentiometric displacement
transducer with a nominal (rated) displacement of 10mm. The entire nomi
nal (rated) displacement will be used. The display range is 10 mm.
The dependency of the excitation voltage and nominal (rated) input voltage
(mV/V) results in the following correlation for the measuring range to be set
with an excitation voltage of 2.5 V:
Nominal (rated) value to be set =
(RANGE)
Nom. (rated) voltage (displacement)
Excitation voltage
Nominal (rated) value (range) = 2.5 V/2.5 V = 1.000 mV/V
This value of 1000 mV/V or 1 V/V only changes if a potentiometric trans
ducer is used with a partial range.
In the second method, a partial range calibration is performed with gage
blocks of 7 mm for calibrating the zero point and measuring range.
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