User`s guide

Multimeter Features 3
Making Relative Measurements (Null)
U1273A/U1273AX User’s Guide 89
Figure 3-2 Null operation
NOTE
• In resistance measurement, 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.
• For DC voltage measurements, the thermal effect will influence the
accuracy of the measurements. Short the test leads and press
when the displayed value is stable to zero-adjust the display.
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Display returns
to normal after
3 seconds
Press to enable the Null function.
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Press again to
disable the Null function.
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Press
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