Performance Veri
fi
cation
12.
Record the exact measurement of the
DMM as M1.
13.
Set the current source output to -2.00 A.
14.
Record the exact measurement of the
DMM as M2.
Test current = ±10.00 A (±2.00 A source output x 5 coil turns)
Expected output voltage (Ve) = 1.00 V (1 mV/10 mA)
15.
Compute the % Error using the measured
amplitude values and the formula shown.
For example, you might measure values of
0.975 V for M1 and –0.995 V for M2. With
an expected output voltage (Ve) of 1.000 V,
compute the % Error as shown.
16.
Disable the calibrator output.
If the computed % Error is out of the speci
fi
ed
limit, the probe may require an adjustment.
(See page 72,
Example:
68
20 A Current Probes Instruction Manual
