To Make Null (Relative) Measurements
Each null measurement, also called relative, is the difference between a
stored null value and the input signal.
Result = reading – null value
• You can make null measurements with any function except
continuity, diode, or ratio. The null operation is local to the selected
function; when you change functions, null is disabled.
• 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.
• The null register is cleared when you change functions, turn null off,
turn off the power, or perform a remote interface reset.
Enables null operation;
Press again to disable.
Math annunciator is on when
null operation is enabled.
To read / edit the null value, use the MATH menu.
Chapter 2 Front-Panel Menu Operation
To Make Null (Relative) Measurements
38
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