Keithley 2280 Series Reference Manual

Section 7: SCPI command reference Series 2280 Precision DC Power Supply Reference Manual
7-66 077085503 / March 2019
:SENSe[n]:<function>:NPLCycles
This command sets the time that the input signal is measured for measurements of the selected function.
Type
Affected by
Where saved
Default value
Command and query
Recall settings
Instrument reset
Power cycle
Save settings
1
Usage
:SENSe[n]:<function>:NPLCycles <value>
:SENSe[n]:<function>:NPLCycles?
:SENSe[n]:<function>:NPLCycles? DEFault
:SENSe[n]:<function>:NPLCycles? MINimum
:SENSe[n]:<function>:NPLCycles? MAXimum
[n]
Channel number: For single-channel instruments, the value is 1
<function>
The measurement function to which this setting applies:
 Concurrent: CONCurrent[:DC]
 Current: CURRent[:DC]
 Voltage: VOLTage[:DC]
<value>
The number of power-line cycles for each measurement: 0.002 to 12 for
50 Hz; 0.002 to 15 for 60 Hz
Details
This command sets the amount of time that the input signal is measured.
The amount of time is specified in parameters that are based on the number of power line cycles
(NPLCs). Each PLC for 60 Hz is 16.67 ms (1/60) and each PLC for 50 Hz is 20 ms (1/50).
This command is set for the measurement of specific functions (concurrent, current, or voltage).
The shortest amount of time (0.002 PLC) results in the fastest reading rate, but increases reading
noise and decrease the number of usable digits.
The longest amount of time (15 PLC) provides the lowest reading noise and more readable digits, but
has the slowest reading rate.
Settings between the fastest and slowest number of PLCs are a compromise between speed and
noise.
Example
:SENS:CURR:NPLC 0.5
Sets the measurement time for current
measurements to 0.0083 (0.5/60) s.
Also see
Optimizing either measurement accuracy or speed (on page 4-1)

Keithley 2280 Series Specifications

General

Brand	Keithley
Model	2280 Series
Category	Power Supply
Language	English