Keithley 6482 - Remote Command Data Store; Data Store Commands

6482-901-01 Rev. A / August 2012 Return to Section Topics 6-5
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 6: Data Store
See Table 6-1 in this section for a summary of these commands (see Section 16, “TRACe
subsystem,” for more details).
Using :READ? to store data
Use :TRIG:COUN <n> to set the number of readings to be stored (n = Number of readings; 3000
maximum). Use the :FORM:ELEM CURR1 | CURR2 to select the channel. Turn on the output with
:OUTP1 ON or :OUTP2 ON and then send the :READ? command to trigger and access readings.
Once you access these readings, you will still be able to access previously stored :TRACe buffer
readings using :TRAC:DATA?. See Section 8 and Section 16, “Trigger subsystem,” for triggering
details, and Section 15 for information on the :READ? command.
Remote command data store
This topic describes basic data store (buffer) capabilities as accessed over a remote interface.
Data store commands
Table 6-1 summarizes commands associated with data store operation. See Section 16, “TRACe
subsystem,” “DISPlay subsystem,” “FORMat subsystem,” and “CALCulate8,” for more detailed
information on these commands.
Table 6-1
Data store commands
Command Description
:TRACe:DATA?
:TRACe:CLEar
:TRACe:FREE?
:TRACe:POINts <n>
:TRACe:POINts:ACTual?
:TRACe:FEED:CONTrol <name>
:TRACe:TSTamp:FORMat <name>
:CALCulate8:FORMat <name>
:CALCulate8:DATA?
:FORMat:ELEMents:TRACe <name>
:DISPlay:MODE <name>
Read contents of buffer.
Clear buffer.
Read buffer memory status.
Specify buffer size (n = Buffer size).
Query number of stored readings.
Start or stop buffer. Name = NEXT (fill buffer and stop) or NEVer
(disable buffer).
Select timestamp format. Name = ABSolute (reference to first
buffer reading) or DELTa (time between buffer readings).
Select buffer statistic (name = MEAN, SDEViation, MAXimum,
MINimum, or PKPK).
Read buffer statistic data.
Select buffer data elements. Name = CURRent[1], CURRent2,
CALCulate1, or CALCulate2, CALCulate3, CALCulate4,
CALCulate5, CALCulate6, CALCulate7, TIME, STATus, ALL, or
DEFault (CURRent[1] or CURRent2).
Select CALC8:DATA? source. Name = CALC3, CALC4, CALC5, or
CALC6.