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3
Multimeter Features
Making Relative Measurements (Null)
When making null measurements, also called relative, each reading is the
difference between a null value (stored or measured) and the input signal.
One possible application is to increase the accuracy of a resistance measurement
by nulling the test lead resistance. Nulling the leads is also particularly important
prior to making capacitance measurements.
Null can be set for both auto and manual range settings, but an overload reading
NOTE
cannot be stored as a null value.
1 To activate the relative mode, press
Figure 3-3
2 Press
3 To disable the Null function, press
98
that when Null (
) is enabled, is stored as the reference value.
Null display
Vsense
again to view the stored reference value (
will return to normal after 3 seconds.
shown.
Vsense
. The measurement value at the time
Vsense
while the stored reference value is
Keysight U1241C/U1242C User's Guide
flashes). The display
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