Keysight U1241AN, User'S And Service Manual

Page: 38 / 85

2 Features and Functions
38 Keysight U1241AN User’s and Service Guide
Null (Relative)
The Null function subtracts a stored value from the present measurement and
displays the difference between the two values.
1 Press to store the displayed reading as the reference value to be
subtracted from subsequent measurements and to set the display to zero. The
NULL annunciator is displayed.
2 Press to view the stored reference value. The NULL annunciator will
flash for three seconds before the display returns to zero. To exit this mode,
press
while NULL is flashing on the display.
NOTE
– In resistance measurement, the multimeter reads a non-zero value due to the
presence of test leads resistance. Use the Null function to zero-adjust the
effect of test lead resistance.
– In DC voltage measurement, the thermal effect will influence the accuracy.
Short the test leads and press once the displayed value is stable in
order to zero out the offset.