Keithley 2002, Calibration Manual

Page: 52 / 114

Calibration
2-23
Step 8: Perform low-level calibration steps
NOTE
The following steps perform the low-level
part of the calibration procedure. Use only
the indicated calibration values for these
steps. Be sure the instrument completes
each step before sending the next calibra-
tion command.
1. Connect the Model 2002 to the calibrator using 2-wire
connections, as shown in Figure 2-4.
2. Program the calibrator to output 20V AC at a frequency
of 1kHz, then send the following command to the Model
2002:
:CAL:PROT:LLEV:STEP 1
3. Program the calibrator to output 20V AC at a frequency
of 30kHz, and send the following command to the
Model 2002:
:CAL:PROT:LLEV:STEP 2
4. Set the calibrator output to 200V AC at 1kHz, then send
the following command:
:CAL:PROT:LLEV:STEP 3
5. Set the calibrator output to 200V AC at a frequency of
30kHz, then send the following command:
:CAL:PROT:LLEV:STEP 4
6. Program the calibrator to output 1.5V AC at a frequency
of 1kHz. Send the following command to the Model
2002:
:CAL:PROT:LLEV:STEP 5
7. Program the calibrator to output 200mV AC at a fre-
quency of 1kHz, and send the following command to the
Model 2002:
:CAL:PROT:LLEV:STEP 6
8. Set the calibrator output to 5mV AC at a frequency of
100kHz. Send the following command to the Model
2002:
:CAL:PROT:LLEV:STEP 7
9. Program the calibrator to output 0.5mV AC at a frequen-
cy of 1kHz. Send the following command to the Model
2002:
:CAL:PROT:LLEV:STEP 8
10. Set the calibrator output to +100V DC. Send the follow-
ing command to the Model 2002:
:CAL:PROT:LLEV:STEP 9
NOTE
The accuracy of the 100V calibration
source is especially critical. It may be nec-
essary to adjust the calibrator output
slightly to achieve exactly 100V.
11. Program the calibrator to output -20V DC, and send the
following command to the Model 2002:
:CAL:PROT:LLEV:STEP 10
NOTE
The accuracy of the -20V source is espe-
cially critical. It may be necessary to
adjust the calibrator output slightly to
achieve exactly -20V.
12. Connect the Model 8610 calibration short to the rear
panel INPUT jacks, making sure to connect the termi-
nals properly. Select the rear inputs with the FRONT/
REAR switch, and allow at least three minutes for ther-
mal equilibrium. Send the following command:
:CAL:PROT:LLEV:STEP 11
13. Connect the calibrator to the AMPS and INPUT LO ter-
minals, as shown in Figure 2-3. Select the front inputs
with the FRONT/REAR switch.
14. Program the calibrator to output 20mA AC at a fre-
quency of 1kHz. Send the following command to the
Model 2002:
:CAL:PROT:LLEV:STEP 12
15. Connect the multifunction synthesizer to the Model
2002, as shown in Figure 2-5.
16. Set the synthesizer operating modes as follows:
FCTN: sine
FREQ: 1Hz
AMPTD: 2Vrms
MODE: CONT
OFFSET: 0V
17. Send the following command to the Model 2002:
:CAL:PROT:LLEV:STEP 13
Step 9: Enter calibration dates
Use following commands to set the calibration date and cal-
ibration due date:
:CAL:PROT:DATE <yr>, <mon>, <day>
:CAL:PROT:NDUE <yr>, <mon>, <day>
Note that the year, month, and date must be separated by
commas.