To Make Null (Relative) Measurements
Each null measurement, also called relative, is the difference between a
stored null value and the input signal. See page 77.
Reading = measurement – null value
• You can make null measurements on any function or channel. You can
set a null for each channel and function independently. The meter
remembers the null value when you switch between input channels or
functions.
• To null the test lead resistance for more accurate two-wire ohms
measurements, short the ends of the test leads together and then
press
Null .
• The first reading taken after you press
Null is stored as the null value
in the Null Register. Any previously stored value is replaced with the
new value.
• After enabling null, you can edit the stored null value by
pressing
Shift > (Menu Recall). This takes you to the “NULL
VALUE” command in the MATH MENU (only if null is enabled). Go
down to the “parameter” level, and then edit the displayed value.
Enables null operation;
Press again to disable
Null annunciator is on when
null operation is enabled
2
Chapter 2 Front-Panel Operation
To Make Null (Relative) Measurements
45
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