Selecting A Range - Agilent Technologies U3401A User's And Service Manual

2 Operations and Features

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
• Manual ranging — If the input signal is greater than can be measured
• The multimeter remembers the selected ranging method (auto or
• Autorange thresholds - The multimeter shifts ranges as follows:
•
30
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.
measurement. In autoranging mode, the range setting for both the
primary and secondary display are corresponding to the higher range of
two displays.
on the selected range, the multimeter will display an overload
indication, OL on the primary or secondary display front panel.
manual) and the selected manual range for each measurement function.
• Down range at < 5% of current range
• Up range at > full scale of current range
Table 2- 1 shows the summary of range scale values respectively.
U3401A User's and Service Guide