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Model 6517B Electrometer Reference Manual Section 14: SCPI command reference

6517B-901-01 Rev. C / August 2015 14-65

:LLIMit <n>

This command is used to set the lower limit for volts and amps.

Usage

[:SENSe[1]]:VOLTage[:DC]:RANGe:AUTO:LLIMit <n>

[:SENSe[1]]:CURRent[:DC]:RANGe:AUTO:LLIMit <n>

:ULIMit?

DEFault

MINimum

MAXimum

:LLIMit?

DEFault:LLIMit?

MINimum:LLIMit?

MAXimum Query largest allowable lower limit

<n>

 0 to 210: Range limit for volts

 0 to 21e-3: Range limit for amps

 DEFault : 210 (volts)

 21e-3 (amps)

 MINimum: 0 (volts and amps)

 MAXimum: Same as DEFault

Details

Automatic range changes slow down the reading rate. By setting upper and lower measurement

range limits, you can prevent inadvertent range changes to ranges that you are not going to use.

The upper range limit is selected by specifying the maximum expected reading that you expect to

measure. For example, if the maximum expected reading is approximately 1mA, let the parameter

(<n>) = 0.001 (or 1e-3). The lowest (most sensitive) range that can measure 1 mA is the 2 mA range.

Thus, the 2 mA range is selected as the upper range limit. With this upper limit, the instrument cannot

uprange to the 20 mA measurement range.

The lower range limit is selected by specifying the lowest expected reading that you expect to

measure.

Also see

:LGRoup <name> (on page 14-66)

Keithley 6517B Reference Manual

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