Making Relative Measurements (Null); Figure 3-1 Null Display - Agilent Technologies u1273a User Manual

3 Multimeter Features

Making Relative Measurements (Null)

Making Relative Measurements (Null)

N O T E
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When making null measurements, also called relative, each
reading is the difference between a stored (selected or
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 an overload.
1 To activate the relative mode, press the
measurement value at the time that when Null (
enabled, is stored as the reference value.

Figure 3-1 Null display

2 Press again to view the stored reference value
( ). The display will return to normal after 3
seconds.
3 To disable the Null function, press
reference value is shown
For any measurement function, you can directly measure and
store the null value by pressing
open (nulls the test lead capacitance), shorted (nulls the test
lead resistance), or across a desired null value circuit.
while the stored
(step 2).
with the test leads
U1273A/U1273AX User's Guide
key. The
) is