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Section 14: SCPI command reference
:AUTO <b>|ONCE
This command is used to control auto NPLC for volts, amps, ohms, and coulombs.
Usage
[:SENSe[1]]:VOLTage[:DC]:NPLCycles:AUTO <b>|ONCE
[:SENSe[1]]:CURRent[:DC]:NPLCycles:AUTO <b>|ONCE
[:SENSe[1]:RESistance:NPLCycles:AUTO <b>|ONCE
[:SENSe[1]]:CHARge:NPLCycles:AUTO <b>|ONCE
:AUTO?
<b>
Details
These commands are used to enable or disable auto NPLC for the specified measurement function.
With auto NPLC enabled, the instrument automatically optimizes the NPLC value for the present
resolution setting.
(AUTO).
The ONCE parameter is analogous to a momentary toggle switch. When :AUTO ONCE is sent, auto
NPLC turns on momentarily and then disables. While enabled, it automatically selects the appropriate
value as summarized in the tables. When auto NPLC disables, NPLC remains at the selected value.
:NPLC:AUTO is coupled to the command that manually sets the NPLC value (:NPLC <n>). When
auto NPLC is enabled, the parameter value for :NPLC <n> changes to the automatically selected
NPLC value. Thus, when auto NPLC is disabled, NPLC remains at the automatically selected value.
Also, a valid NPLC value sent using the :NPLC <n> command disables auto NPLC.
Auto NPLC is also coupled to auto aperture. Enabling or disabling auto NPLC also enables or
disables auto Aperture. Also, a valid aperture value sent using the :APERture command disables
auto NPLC.
Also see
None
:RANGe commands
Volts, amps, and coulombs ranges.
14-62
1 or ON
0 or OFF
ONCE
Display resolution
(on page 5-18) provides the integration times for SET-BY-RSLN
Model 6517B Electrometer Reference Manual
6517B-901-01 Rev. C / August 2015
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