capacitive transducer
TRANSCRIPT
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MEASUREMENTS LAB
Experiment No: 3 Capacitive Transducer
Calibration POT
Signal Conditioner
Power supply, 230V
Step 1: Ensure that the capacitor terminals are connected to signal conditioner
unit properly as indicated. And the plates should be clean without any
dust.
Zero POT
Fixed Plate
Movable Plate
Linear Scale
Capacitor terminals
DPM (Digital Panel Meter)
MEASUREMENTS LAB
Experiment No: 3 Capacitive Transducer
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Switch ON the instrument and keep it idle for 3-4 minutes for initial warm up.
Step 2: Keep the movable plate on scale at ‘0’ by moving left, and adjust the
zero POT to read the value ‘000’ from DPM.
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MEASUREMENTS LAB
Experiment No: 3 Capacitive Transducer
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Step 3: Calculate the overlap area (w x L, cm2) between the two
plates using a scale. And measure the plate voltage (Vp) across
the output terminals using DMM.
(DMM red probe is connected to V/Ω terminal, black probe to COM terminal.)
wL
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MEASUREMENTS LAB
Experiment No: 3 Capacitive Transducer
Step 4: Keep the movable plate on
scale at ‘50’ by moving right, and
adjust the ‘Cal POT’ to read the value
‘050’ from DPM.
Calculate again the overlap area now
And measure the output voltage as
mentioned in the step – 3.
Once the Zero & Cal POTs calibrated
They should be kept constant during
entire range operation.
Adjust the scale for different positions
and calculate overlap area and Vp.