Keysight U1251B Guia Del Usuario página 85

Null (Relative)
The Null function subtracts a stored value from the present measurement and
displays the difference between the two.
1 Press
2 Press
3 To exit this mode, press
– Null can be set for both auto and manual range settings, but not in the event
NOTE
– When taking a resistance measurement and the meter reads a non-zero
– When taking a DC voltage measurement, the thermal effect will influence the
Keysight U1251B and U1252B User's and Service Guide
to store the displayed reading as the reference value to be
subtracted from subsequent measurements and to set the display to zero.
NULL is displayed.
to see the stored reference value. NULL flashes for 3 seconds
before the display returns to zero.
of an overload.
value due to the presence of test leads, use the Null function to adjust the
display to zero.
accuracy. Short the test leads and press Null once the displayed value is
stable in order to zero out the display.
Functions and Features
while NULL is flashing on the display.
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