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Features and Functions
Null (Relative)
The Null function subtracts a stored value from the present measurement and
displays the difference between the two values.
1 Press
2 Press
– In resistance measurement, the multimeter reads a non-zero value due to the
NOTE
– In DC voltage measurement, the thermal effect will influence the accuracy.
Data Logging (U1242B)
The data logging function stores the data in non-volatile memory. Thereby, the
data remains saved when the multimeter is turned off. Data logging records only
the value on primary display. Two options of data logging are offered — Hand
(manual) logging and Interval (automatic) logging functions.
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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.
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.
presence of test leads resistance. Use the Null function to zero-adjust the
effect of test lead resistance.
Short the test leads and press
order to zero out the offset.
once the displayed value is stable in
Keysight U1241B and U1242B User's and Service Guide
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