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3
Functions and Features
NULL (Relative)
N O T E
N O T E
62
The Null function subtracts a stored value from the present
measurement and displays the difference between the two.
1 Press
to store the displayed reading as the
reference value to be subtracted from subsequent
measurements and to set the display to zero.
displayed.
Null can be set for both auto and manual range settings, but not in the
case of an overload.
2 Press
to view the stored reference value.
and the stored reference value are displayed for 3
seconds.
3 To exit this mode:
• press
within the 3 seconds when
the stored reference value is displayed, or
• press
for more than 1 second.
• In resistance measurement mode, the multimeter will read a non-zero
value even when the two test leads are in direct contact, because of
the resistance of these leads. Use the Null function to zero-adjust the
display.
• In DC voltage measurement mode, thermal effects will influence the
accuracy. Short the test leads and press
is stable to zero-adjust the display.
once the displayed value
U1253A User's and Service Guide
is
and
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