Keithley 2000 Calibration Manual

SCPI command calibration
Follow the steps in this section to use SCPI commands to perform comprehensive, DC only,
and AC only calibration procedures. See Section 3 for a detailed list and description of SCPI cal-
ibration commands.
When sending calibration commands, be sure that the Model 2000 completes each step before
sending the next command. You can do so either by observing the front panel CALIBRATING
message, or by Detecting the completion of each step over the bus. (See “Detecting calibration
step completion” at the end of Section 3.)
The procedures for calibrating the Model 2000 using SCPI commands include:
• Preparing the Model 2000 for calibration
• Front panel short and open calibration
• DC voltage calibration
• Resistance calibration
• DC current calibration
• AC voltage calibration
• AC current calibration
• Programming calibration dates
• Saving calibration constants
• Locking out calibration
NOTE As with front panel calibration, you can choose to perform complete, DC-only, or AC-
only calibration. When sending calibration commands, be sure to include a space
character between each command and parameter.
Preparing the Model 2000 for calibration
1. Connect the Model 2000 to the IEEE-488 bus of the computer using a shielded IEEE-
488 cable, such as the Keithley Model 7007, or connect the unit to a computer through
an RS-232 port using a straight-through 9-pin to 9-pin cable (use a 9-25-pin adapter if
necessary).
2. Turn on the Model 2000, and allow it to warm up for an hour before performing calibra-
tion.
3. Select the DCV function and choose SLOW as the RATE (integration time = 10 PLC).
4. Make sure the primary address of the Model 2000 is the same as the address specified in
the program that you will be using to send commands. (Use the GPIB key.)
5. Unlock the calibration function by sending this command:
:CAL:PROT:CODE 'KI002000'
(The above command shows the default code, KI002000. Substitute the correct code if
changed.)
6. Send the following command to initiate calibration:
:CAL:PROT:INIT
2-14 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