Autoranging; Low Range Limits - Keithley 2601B Reference Manual

Section 2: General operation

Autoranging

To use automatic source ranging, press SRC then the AUTO range key. To use automatic measure
ranging, press the MEAS key followed by the AUTO range key. The AUTO indicator turns on when
source or measure autoranging is selected. With autoranging selected, the instrument automatically
sets the best range to source or measure the applied signal. The instrument will uprange at 100
percent of the present range.
When you change a source value, source autoranging is automatically turned off and remains off
until you re-enable it.

Low range limits

The low range limit sets the lowest range that the Series 2600B will use when autoranging is enabled.
This feature is useful for minimizing autorange settling times when numerous range changes are
involved.
To individually set low range limits for Source V, Source I, Measure V, and Measure I:
1. Press the CONFIG key, then press either the SRC key (for source) or the MEAS key (for
measure).
2. Select voltage or current source, or measure, as appropriate, and then press the ENTER key or
the navigation wheel
3. Select LOWRANGE, and then press the ENTER key or the navigation wheel
4. Set the low range to the appropriate setting, and then press the ENTER key or the navigation
wheel
5. Use the EXIT (LOCAL) key to return to the normal display.
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Series 2600B System SourceMeter® Instrument Reference Manual
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2600BS-901-01 Rev. B / May 2013