Keithley 2001 User Manual

IEEE-488 Reference
4-125
Formats :curr:ac:nplc:auto <b> :curr[:dc]:nplc:auto <b>
:curr:ac:nplc:auto ONCE :curr[:dc]:nplc:auto ONCE
:volt:ac:nplc:auto <b> :volt[:dc]:nplc:auto <b>
:volt:ac:nplc:auto ONCE :volt[:dc]:nplc:auto ONCE
:res:nplc:auto <b> :fres:nplc:auto <b>
:res:nplc:auto ONCE :fres:nplc:auto ONCE
:temp:nplc:auto <b>
:temp:nplc:auto ONCE
Defaults Power-up Saved power-on setup
*RST OFF
:SYSTem:PRESet OFF
Query :AUTO? Query state of auto NPLC
Short-form formats: :curr:ac:nplc:auto?
:curr[:dc]:nplc:auto?
:volt:ac:nplc:auto?
:volt[:dc]:nplc:auto?
:res:nplc:auto?
:fres:nplc:auto?
:temp:nplc:auto?
Response message: 0 (off) or 1 (on)
Description These commands are used to enable or disable auto NPLC for for the specified measurement
function. With auto NPLC enabled, the instrument will automatically select the NPLC value to
optimize the measurement.
When auto NPLC is enabled for the TEMP function, the instrument will select an NPLC value
of 1. The NPLC values selected by the instrument for the other measurement functions are sum-
marized in Tables 4-17 through 4-20.
The ONCE parameter is analogous to a momentary toggle switch. When :AUTO ONCE is sent,
auto NPLC will turn on momentarily and then disable. While enabled it will automatically select
the appropriate value as summarized in the tables. When auto NPLC disables, NPLC will remain
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, the NPLC will remain at the automat-
ically selected value.
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 will dis-
able auto NPLC.

Keithley 2001 Specifications

General

Brand	Keithley
Model	2001
Category	Multimeter
Language	English