Technical data

60 U1401A User’s and Service Guide
3 Making Measurements
Relative (zero)
The relative function subtracts a stored value from the
present measured value and displays the difference.
1 Press to store the currently displayed reading as the
reference value to be subtracted from subsequent
measurements. The annunciator will be displayed.
2 The relative mode can be activated in both auto and
manual ranges, but it cannot be set if the present reading
is overload (OL).
3 Press to exit the relative mode.
There are two possible applications:
• For a resistance measurement, the display will read a
non- zero value even when no measurement is being taken,
due to the resistance of the test leads. You can use the
relative function to zero- adjust the reading.
• For a DC voltage measurement, the thermal effect will
influence the accuracy. Use the relative function to offset
the thermal effect. Short the test leads and press
when the displayed value has settled down to a stable
state.
Figure 3-8 Relative (zero) mode
Press