Keithley SourceMeter 2425, Service Manual, Page: 134 / 141

Model 2425 Service Manual Calibration Programs C-7
Requesting calibration constants
Program C-2 listed below demonstrates how to request the calibration constants from the
Model 2425. The program requests and displays the calibration constants for all ranges of
both the volts and current source and measurement functions.
Program C-2 Requesting calibration constants
' Example program to request calibration constants.
' Model 2425 primary address = 24
OPEN "IEEE" FOR OUTPUT AS #1 ' Open IEEE-488 output path.
OPEN "IEEE" FOR INPUT AS #2 ' Open IEEE-488 input path.
PRINT #1, "INTERM CRLF" ' Set input terminator.
PRINT #1, "OUTTERM LF" ' Set output terminator.
PRINT #1, "REMOTE 24" ' Put 2425 in remote.
PRINT #1, "OUTPUT 24;*RST" ' Restore defaults.
CLS
PRINT #1, "OUTPUT 24;:SENS:FUNC:CONC OFF"
PRINT #1, "OUTPUT 24;:SENS:FUNC 'VOLT:DC'"
PRINT #1, "OUTPUT 24;:SOUR:FUNC VOLT"
PRINT #1, "OUTPUT 24;:CAL:PROT:CODE 'KI002425'" ' Unlock calibration.
Range = .2 ' Initial range = 200mV.
PRINT "Model 2425 Voltage Calibration Constants:": PRINT
DO ' Loop for all volts ranges.
PRINT #1, "OUTPUT 24;:SOUR:VOLT:RANGE "; Range
PRINT #1, "OUTPUT 24;:CAL:PROT:SENS:DATA?"
PRINT #1, "ENTER 24"
LINE INPUT #2, Data$
PRINT Data$
PRINT #1, "OUTPUT 24;:CAL:PROT:SOUR:DATA?"
PRINT #1, "ENTER 24"
LINE INPUT #2, Data$
PRINT Data$
Range = Range * 10
IF Range = 200 THEN Range = 100
LOOP WHILE Range <= 100
PRINT #1, "OUTPUT 24;:CAL:PROT:LOCK"
PRINT #1, "OUTPUT 24;:SENS:FUNC 'CURR:DC'"
PRINT #1, "OUTPUT 24;:SOUR:FUNC CURR"
PRINT #1, "OUTPUT 24;:CAL:PROT:CODE 'KI002425'"
Range = .00001 ' Initial range = 10uA.
PRINT : PRINT "Model 2425 Current Calibration Constants:": PRINT