Keithley 2500 - Page 48

Model 2500 Service Manual Calibration 2-21
4. Send the following command to unlock calibration:
:CAL:PROT:CODE 'KI002500'
5. Table 2-7 summarizes the various calibration steps and associated commands,
which are covered in more detail throughout the procedure.
Table 2-7
Remote calibration step summary
Calibrated
function Calibration command* Test connections
Input offset
(ch. 1)
Voltage
bias (ch. 1)
Input offset
(ch. 2)
Voltage
bias (ch. 2)
:CAL:PROT:SOUR1:OFFS
:OUTP1 ON
:SOUR1:VOLT:RANG <Range>
:SOUR1:VOLT <+FS>
:CAL:PROT:SOUR1 <DMM_Reading>
:SOUR1:VOLT 0
:CAL:PROT:SOUR1 <DMM_Reading>
:SOUR1:VOLT <-FS>
:CAL:PROT:SOUR1 <DMM_Reading>
:OUTP1 OFF
:OUTP2 ON
:SOUR2:VOLT:RANG <Range>
:SOUR2:VOLT <+FS>
:CAL:PROT:SOUR2:OFFS
:CAL:PROT:SOUR2 <DMM_Reading>
:SOUR2:VOLT 0
:CAL:PROT:SOUR2 <DMM_Reading>
:SOUR2:VOLT <-FS>
:CAL:PROT:SOUR2 <DMM_Reading>
:OUTP2 OFF
Triax shield cap on channel 1 INPUT jack.
DMM to channel 1 OUTPUT/INPUT LO (
Figure 2-1)
DMM to channel 1 OUTPUT/INPUT LO (
Figure 2-1)
DMM to channel 1 OUTPUT/INPUT LO (
Figure 2-1)
DMM to channel 2 OUTPUT/INPUT LO (
Figure 2-2)
Triax shield cap on channel 2 INPUT jack.
DMM to channel 2 OUTPUT/INPUT LO (
Figure 2-2)
DMM to channel 2 OUTPUT/INPUT LO (
Figure 2-2)
Current
(ch. 1)
Current
(ch. 2)
:SENS1:CURR:RANG <Range>
:CAL:PROT:SENS1 <+FS_current>
:CAL:PROT:SENS1 <Zero_current>
:CAL:PROT:SENS1 <-FS_current>
:SENS2:CURR:RANG <Range>
:CAL:PROT:SENS2 <+FS_current>
:CAL:PROT:SENS2 <Zero_current>
:CAL:PROT:SENS2 <-FS_current>
Calibrator to channel 1 INPUT (
Figure 2-3)
Calibrator to channel 1 INPUT (
Figure 2-3)
Calibrator to channel 1 INPUT (
Figure 2-3)
Calibrator to channel 2 INPUT (
Figure 2-4)
Calibrator to channel 2 INPUT (
Figure 2-4)
Calibrator to channel 2 INPUT (
Figure 2-4)
*Procedure repeated separately for each range. Voltage <Range> = 10 or 100. Current <Range> = 2e-9 to 20e-3 in decade steps.