Keithley 2000 Calibration Manual

SCPI command calibration
1. Connect the low-thermal short to the rear panel input jacks, 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 command
is:
:CAL:PROT:CODE 'KI002000'
4. Initiate calibration by sending the following command:
:CAL:PROT:INIT
5. Calibrate step 0 with the following command:
:CAL:PROT:AC:STEP0
6. Perform the entire SCPI command comprehensive calibration procedure discussed ear-
lier in this section.
7. Connect the synthesizer to the Model 2000 INPUT jacks as shown in Figure 2-5. Select
the front input jacks with the INPUTS switch.
8. Set the synthesizer output to 1V RMS at 3Hz, then send the following command:
:CAL:PROT:AC:STEP14 <Cal_voltage>
Here <Cal_voltage> is the actual 3Hz synthesizer signal amplitude you recorded earlier.
9. Set the synthesizer output to 1V RMS at 1kHz, then send the following command:
:CAL:PROT:AC:STEP15 1E3
10. Send the following commands to set calibration dates, save calibration constants, and
lock out calibration:
:CAL:PROT:DATE <year>, <month>, <day>
:CAL:PROT:NDUE <year>, <month>,<day>
:CAL:PROT:SAVE
:CAL:PROT:LOCK
NOTE After manufacturing calibration is unlocked, you have the option of performing com-
prehensive, DC-only, or AC-only calibration. If you calibrate DC-only and then lock
out calibration, manufacturing calibration is then locked, and you cannot then per-
form AC calibration. You must then unlock manufacturing calibration by holding in
the OPEN key and cycling power.
2-22 Calibration

Keithley 2000 Specifications

General

Digits	6.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Resistance Range	100 Ω to 100 MΩ
Connectivity	IEEE-488 (GPIB)
Display Type	VFD