Keithley 2790, Reference Manual

Page: 437 / 568

17-18 Model 2790 SourceMeter
®
Switch System Reference Manual
DC current calibration
After the 1M
Ω
resistance point has been calibrated, follow these steps for DC current
calibration:
1. Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2790
as shown in
Figure 17-3 .
2. Perform the calibration steps listed in Table 17-10 . For each step:
• Set the calibrator to the indicated current and make sure the unit is in operate.
(Use the recommended current if possible.)
• Send the indicated programming command. (Change the current parameter if
you are using a different calibration current.)
• Wait until the Model 2790 completes each step before continuing.
klqb
If you are performing DC-only calibration, proceed to “Programming calibra-
tion dates.”
AC voltage calibration
Follow these steps for AC voltage calibration:
1. Connect the calibrator to the Model 2790 INPUT HI and LO terminals as shown in
Figure 17-4 .
2. Perform the calibration steps summarized in Table 17-11 . For each step:
• Set the calibrator to the indicated voltage and frequency. Make sure the unit is
in operate. (You must use the stated voltage and frequency.)
• Send the indicated programming command.
• Wait until the Model 2790 completes each step before continuing.
Table 17-10
DC current calibration programming steps
Calibration
step
Calibrator
current Calibration command* Parameter range
10mA
100mA
1A 10.00000mA
100.00000mA
1.000000A :CAL:PROT:DC:STEP10 10E-3
:CAL:PROT:DC:STEP11 100E-3
:CAL:PROT:DC:STEP12 1 9E-3 to 11E-3
90E-3 to 110E-3
0.9 to 1.1
*Change parameter if using different current.