Keithley 2000 Calibration Manual

Front panel short and open calibration
1. Connect the Model 8610 low-thermal short to the instrument INPUT and SENSE termi-
nals as shown in Figure 2-1. Make sure the INPUTS button is not pressed in so that the
front inputs are active. Wait at least three minutes before proceeding to allow for thermal
equilibrium.
NOTE Be sure to connect the low-thermal short properly to the HI, LO, and SENSE termi-
nals. Keep drafts away from low-thermal connections to avoid thermal drift, which
could affect calibration accuracy.
2. Send the following command:
:CAL:PROT:DC:STEP1
3. After the Model 2000 completes this step, remove the short, and send this command:
:CAL:PROT:DC:STEP2
DC voltage calibration
After front panel short and open steps, do the following:
1. Connect the calibrator to the Model 2000 as shown in Figure 2-2. Allow three minutes
for thermal equilibrium.
NOTE Although 4-wire connections are shown, the sense leads are connected and discon-
nected at various points in this procedure by turning calibrator external sense on or
off as appropriate. If your calibrator does not have provisions for turning external
sense on and off, disconnect the sense leads when external sensing is to be turned off,
and connect the sense leads when external sensing is to be turned on.
2. Perform the calibration steps summarized in Table 2-8. For each step:
• Set the calibrator to the indicated voltage, and make sure the unit is in operate. (Use
the recommended voltage if possible.)
• Send the indicated programming command.
• Wait until the Model 2000 completes each step before continuing.
Calibration 2-15

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