Keithley 2790, Reference Manual

Page: 442 / 568

Model 2790 SourceMeter
®
Switch System Reference Manual 17-23
3. Press SHIFT then TEST, then display CALIB: TEST with the up or down range
key. Press ENTER, select RUN, then enter the appropriate calibration code
(default: 002790).
4. Select ALL at the CAL:RUN prompt.
5. Press ENTER to perform the first manufacturing calibration step.
6. Perform the entire front panel comprehensive calibration procedure. See “ Compre-
hensive calibration ” earlier in this section.
7. After the last AC current calibration step, the instrument will prompt you to enter
10Hz at 1V RMS and 1kHz with the following prompts:
• Low-frequency cal: Connect the calibrator to the front panel INPUT jacks
(
Figure 17-5 ). Select the front input jacks with the INPUTS switch. Set the
calibrator to output a 1V RMS, 10Hz sine wave. Use the left and right arrow
keys and the range keys to adjust the display to agree with the calibrator ampli-
tude, then press ENTER. If an error is reported after performing this step, refer
to
Table 17-14 for troubleshooting.
• Frequency cal: Connect the function generator to the front panel INPUT jacks
(
Figure 17-6 ). Set the generator to output a 1V RMS, 1kHz sine wave. Enter
1.000000kHz at the prompt, then press ENTER.
8. Set the calibration dates, then save calibration to complete the process.
Remote manufacturing calibration (firmware revision A04 and higher)
1. Install the shorted calibration extender board (see “ Extender board preparation ”
earlier in this section) in scanner card Slot 1 and select the rear inputs with the
INPUTS switch. Allow three minutes for thermal equilibrium.
2. Press in and hold the OPEN key while turning on the power.
3. Enable calibration by sending the :CODE command. For example, the default com-
mand is:
:CAL:PROT:CODE 'KI002790'
4. Initiate calibration by sending the following command:
:CAL:PROT:INIT
Table 17-14
1V, 10Hz frequency errors
Revision A03
and lower
Revision A04
and higher
1V, 3Hz calibration – No +499 error
– Correct results – Error +499
– Failed cal step
1V, 10Hz calibration – No +499 error
– Incorrect results – No +499 error
– Correct results