Keithley 2001

IEEE-488 Reference
4-102
:RATio and :DELTa commands
:FUNCtion <name>
:ROUTe:SCAN:RATio:FUNCtion <name> Select function for Ratio
:ROUTe:SCAN:DELTa:FUNCtion <name> Select function for Delta
Parameters <name> = ‘VOLTage:DC’ DCV function
= ‘RESistance’ Ω2 function
= ‘FRESistance’ Ω4 function
Formats :rout:scan:rat:func <name>
:rout:scan:delt:func <name>
Defaults Power-up Saved power-on setup
*RST ‘VOLTage:DC’
:SYSTem:PRESet ‘VOLTage:DC’
Query :FUNCtion? Query function for specified calculation
Short-form formats: :rout:scan:rat:func?
:rout:scan:delt:func?
Response message: “VOLT:DC”, “RES” or “FRES”
Description The :FUNCtion command is used to select the measurement function for the specified calcula-
tion (Ratio or Delta). Valid measurement functions include DCV, Ω2 and Ω4. Note that Ω4
(four-wire ohms) is only valid for reference and measure channels one through five (see
:RCHannel and :MCHannel).
The function parameters are shown enclosed by single quotes. However, double quotes are also
valid. Example:
‘volt:dc’ = “volt:dc”
Programming example 10 OUTPUT 716; “:rout:scan:rat:func ‘res’; func?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Selects the Ω2 measurement function for the Ratio calculation and then queries the
function.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the function for Ratio (“RES”).
:RCHannel <list>
:ROUTe:SCAN:RATio:RCHannel <list> Specify reference channel for Ratio
:ROUTe:SCAN:DELTa:RCHannel <list> Specify reference channel for Delta
Parameter <list> = (@ chanlist)
where; chanlist is a single channel number (1 to 10)