Keithley 2461, Reference Manual, Page: 54 / 1109

Model 2461 Interactive SourceMeter® Instrument Reference Manual Section 2: General operation
2461-901-01 A/November 2015 2-27
Measure menu
The Measure menus allow you to select, configure, and perform measure operations from the front
panel. The following topics describe the settings that are available on these interactive screens.
Measure Settings menu
This menu contains settings for the presently selected measure function, which is identified by an
indicator in the upper right corner of the menu. Select the function indicator to change the source
and measure function.
Setting Description
Range
Set the measure range for the presently selected measure
function. You can select automatic or a specific range. You can
only select a measure range if you are sourcing one type of
measurement and measuring another.
Sense
Select 2-wire (local) or 4-wire (remote) sense mode. Use 2-wire
sense if the error contributed by test lead IR drop is acceptable.
For more accurate voltage source and measurement accuracy, use
4-wire sense.
Display Digits
Set the number of digits that are displayed for front-panel readings.
It does not affect accuracy or speed. Refer to Setting the number of
displayed digits (on page 2-46).
Auto Range Low
Limit
Set the Auto Range Low Limit to prevent the instrument from
selecting a range that is lower than appropriate for your application.
Not available for digitized measurements.
NPLCs
Set the amount of time that the input signal is measured. Lower
NPLC settings result in faster reading rates, but increased noise.
Higher NPLC settings result in lower reading noise, but slower
reading rates. Not available for digitized measurements.
Auto Zero
Set Auto Zero to On to set the instrument so that it periodically gets
new measurements of its internal ground and voltage reference.
This setting increases measurement accuracy, but may slow
measurement time. Not available for digitized measurements.
Count
Sets the number of readings that are processed when a
measurement is requested.
Offset Compensation
The offset compensation setting is only available when the
instrument is set to measure resistance (SVMR( Ω ) or SIMR( Ω )).
Turn this setting on to improve low-resistance measurement
accuracy. Not available for digitized measurements.