Making Relative Measurements (Null) - Keysight Technologies U1231A Guia Del Usuario

3 Multimeter Features

Making Relative Measurements (Null)

When making Null measurements, also called relative, each reading is the
difference between a stored (measured) null value 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 not in the case of
NOTE
an overload.
1 To activate the relative mode, press the
Figure 3-2
2 Press
3 To disable the Null function, press
For any measurement function, you can directly measure and store the null value
by pressing
shorted (nulls the test lead resistance), or across a desired null value circuit.
88
the time, when Null (
Null display
again to view the stored reference value. The display will return to
normal after 3 seconds.
shown (step 2).
with the test leads open (nulls the test lead capacitance),
) is enabled, is stored as the reference value.
while the stored reference value is
Keysight U1231A, U1232A, and U1233A User's Guide
key. The measurement value at