Measuring
Piezoresistive transducers
182 A0534-30.0 HBM: public MGCplus
7.5 Piezoresistive transducers
Piezoresistive transducers are passive transducers. The settings are ex
plained with the following example:
Pressure transducer with characteristics:
Nominal (rated) pressure 300 bar, current feed 10 V, rated output (nominal)
200 mV/V, display range 300 bar, test pressure 250 bar (partial load)
Due to the rated output you must use the ML10B measuring amplifier. The
zero point and measuring range can be adjusted either directly using the
transducer characteristics or with the test pressure. Both possibilities are
described here.
7.5.1 Direct entry of transducer characteristics
1. Use
or a direct entry to choose the desired channel (for example 3.2
).
2. Use
to switch to Setup mode.
3. Press the function key.
4. In the pull-up menu select Transducer and confirm with
.
5. Use
to select transducer type Full bridge circuit high level and
confirm with
.
6. Use
to switch to the Current feed selection field and press .
Select 10V and confirm with
.
7. Use
to switch to the Unit selection field and press . Select bar
as the unit and confirm with
.
8. In both the Zero point edit fields enter the value 0.
9. In the left edit field Nominal (rated) value enter the value 300.
AmplifierSystem Display Options
Transducer
Signal conditioning
Display
Analog outputs
Switch
200.0000 ...
Type Full bridge circuit or high level
Current feed:
Unit: mV/V
Zero pt.:
Nom. val.:
TRANSDUCER CHANNEL1
bar
0.00000 ... 0.00000 ...
300.0000 ...
calibrate...calibrate... Adjust amplifier
measure
10V
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