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Null Operation
Due to the extreme sensitivity of the electronic null detector it is important to ensure
that it is correctly zeroed before attempting accurate measurements.
Zero setting procedure:
a)
Set function switch to ZERO.
b)
Set RANGE switch to required position.
c)
Sensitivity (SENS) to maximum (fully clockwise).
d)
Adjust ZERO control for zero reading on null meter.
Measuring procedure:
a)
Set function switch to MEASURE.
b)
Set output polarity switch to NORM.
c)
Set sensitivity (SENS) to minimum (fully counterclockwise).
d)
Connect unknown voltage to output terminals (in the same polarity).
e)
Adjust output digits and sensitivity for a null balance as required.
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