1Getting Started
30 U3402A 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.
Auto- ranging is convenient because the multimeter automatically selects the
appropriate range for sensing and displaying each measurement. However,
manual ranging results in better performance, since the multimeter does not
have to determine which range to use for each measurement.
For dual display, the measurement range for primary and secondary display as
stated below is similar and is unable to be changed independently.
• Autoranging is selected at default factory power- on.
• 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.
Selects autoranging and disables manual ranging. Press to
toggle between the manual ranging and autoranging.
Selects a higher range and disable autoranging.
Selects a lower range and disable autoranging.
• DCV/DCV • DCI/DCI
• DCV/ACV • DCI/ACI
• ACV/DCV • ACI/DCI
• ACV/ACV • ACI/ACI
• ACV+DCV/DCV • ACI+DCI/DCI
• ACV+DCV/ACV • ACI+DCI/ACI
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