Keithley 6482, Reference Manual

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16-20 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 16: SCPI Command Reference Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
difference between the feed reading (see
FEED <name> above) and the offset value:
CALC3 or CALC4 reading = feed reading - null offset
ACQuire
:CALCulate3:NULL:ACQuire Acquire channel 1 REL value
:CALCulate4:NULL:ACQuire Acquire channel 2 REL value
Description These commands automatically acquire the null offset values for channel 1
(CALC3) and channel 2 (CALC4). The next available reading will become the
offset value.
Enable and read relative result
STATe <b>
:CALCulate3:NULL:STATe <b> Control channel 1 REL
:CALCulate4:NULL:STATe <b> Control channel 2 REL
Parameters <b> = 1 or ON Enable REL
0 or OFF Disable REL
Query :STATe? Query state of REL
Description These commands are used to enable or disable the null or offset value for REL.
When enabled, the CALC3 or CALC4 reading will include the null offset value
(see
OFFSet <n> ). When disabled, the CALC3 or CALC4 reading will not include
the null offset.
DATA?
:CALCulate3:DATA? Read channel 1 REL result
:CALCulate4:DATA? Read channel 2 REL result
Description These query commands are used to read the CALC3 or CALC4 REL result. When
CALC3 or CALC4 is enabled (see
STATe <b> ), the returned value will include the
offset value (see OFFSet <n> and ACQuire ).
CALCulate5
The CALC5 commands configure and control the RATIO function. They perform the remote
equivalents to the front panel RATIO and CONFIG RATIO configuration menu.
Select RATIO calculation mode
FORMat <name>
:CALCulate5:FORMat <name> Select RATIO calculation mode
Parameters <name> = C3C4 CALC3/CALC4
C4C3 CALC4/CALC3
Query :FORMat? Query selected RATIO calculation
Description This command selects the RATIO calculation mode. With C3C4 selected, the
CALC3 result (channel 1 REL) is divided by the CALC4 result (channel 2 REL).
With C4C3 selected, the CALC4 result is divided by the CALC3 result.