Keithley 6482, Reference Manual

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6482-901-01 Rev. A / August 2012 Return to Section Topics 16-37
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 16: SCPI Command Reference
ULIMit <n>
[:SENSe[1]]:CURRent[:DC]:RANGe:AUTO:ULIMit <n>Set autoranging upper limit
for channel 1
:SENSe2:CURRent[:DC]:RANGe:AUTO:ULIMit <n>Set autoranging upper limit
for channel 2
Parameters <n> = -21e-3 to 21e-3 Upper limit
DEFault
20e-3
MINimum 0
MAXimum 20e-3
Query :ULIMit? Query autorange upper limit
Description The upper limit programmed by these commands for both channels must be
greater than or equal to the lower limit. If the upper limit is equal to the lower limit,
autorange is disabled. When autoranging is disabled, you can manually program
the instrument for any range below the upper limit.
Set measurement speed
NPLCycles <n>
[:SENSe[1]]:CURRent[:DC]:NPLCycles <n>Set channel 1 speed (PLC)
:SENSe2:CURRent[:DC]:NPLCycles <n>Set channel 2 speed (PLC)
Parameters <n> = 0.01 to 10 Power-line cycles per integration
DEFault 1
MINimum 0.01
MAXimum 10
Query :NPLCycles? Query programmed PLC value
:NPLCycles? DEFault Query *RST default PLC
:NPLCycles? MINimum Query minimum PLC
:NPLCycles? MAXimum Query maximum PLC
Description This command is used to set the integration period (speed) for measurements.
NPLC (Number of Power Line Cycles) expresses the integration period by basing
it on the power line frequency. For example, for a PLC of 1, the integration period
would be 1/60 (for 60Hz line power) which is 16.67 msec.
Note that this is a global command. Thus, if you set the speed for channel 1 mea-
surements to 10 PLC, then channel 2 will also set to 10 PLC.