Keithley 2015, Service Manual

Page: 52 / 158

Calibration 2-19
Resistance calibration
Follow these steps for resistance calibration:
1. Set the calibrator to the resistance mode, and turn on external sensing.
NOTE
Use external sense (4-wire
Ω
) when calibrating all resistance ranges. Be sure that the
calibrator external sense mode is turned on.
2. Perform the calibration steps summarized in Table 2-10. For each step:
• Set the calibrator to the indicated resistance, and make sure the unit is in operate.
(Use the recommended resistance or the closest available value.)
• Send the indicated programming command. (Change the command parameter if
you are using a different calibration resistance than that shown.)
• Wait until the Model 2015 completes each step before continuing.
Table 2-10
Resistance calibration programming steps
Calibration
step Calibrator
resistance
Calibration command* Parameter range
1k
Ω
10k
Ω
100k
Ω
1M
Ω
1k
Ω
10k
Ω
100k
Ω
1M
Ω
:CAL:PROT:DC:STEP6 1E3
:CAL:PROT:DC:STEP7 10E3
:CAL:PROT:DC:STEP8 100E3
:CAL:PROT:DC:STEP9 1E6 900 to 1.1E3
9E3 to 11E3
90E3 to 110E3
900E3 to 1.1E6
* Use exact calibrator resistance value for parameter.