Technical data

1Getting Started
26 U3401A User’s and Service Guide
Selecting a Range
You can allow the multimeter to select the range automatically by using
autoranging, or you can select a fixed range using manual ranging.
Autoranging is convenient because the multimeter automatically selects the
appropriate range for sensing and displaying each measurement. However,
manual ranging results in better performance, since multimeter does not
have to determine which range to use for each measurement.
The range setting is synchronous for dual display for current or voltage
measurement. In autoranging mode, the range setting for both the
primary and secondary display are corresponding to the higher range of
two displays.
Manual ranging — If the input signal is greater than can be measured
on the selected range, the multimeter will display an overload
indication, OL on the primary or secondary display front panel.
The multimeter remembers the selected ranging method (auto or
manual) and the selected manual range for each measurement function.
Autorange thresholds - The multimeter shifts ranges as follows:
Down range at < 5% of current range.
Up range at > full scale of current range.
Table 1- 4 shows the summary of range scale values respectively.
Selects autoranging and disable manual ranging. Press to
toggle in and out of the manual ranging and autoranging.
Selects a higher range and disable autoranging.
Selects a lower range and disable autoranging.