Keithley 2000 Calibration Manual

Performing the verification test procedures
Test summary
Verification test procedures include:
• DC volts
• AC volts
• DC current
• AC current
• Resistance
If the Model 2000 is not within specifications and not under warranty, see the calibration pro-
cedures in Section 2.
Test considerations
When performing the verification procedures:
• Be sure to restore factory defaults as outlined above.
• Make sure that the equipment is properly warmed up and connected to the front panel
input jacks. Also make sure that the front panel input jacks are selected with the INPUTS
switch.
• Do not use autoranging for any verification tests because autorange hysteresis may cause
the Model 2000 to be on an incorrect range. For each test signal, you must manually set
the correct range for the Model 2000 using the range keys.
• Make sure the calibrator is in operate before you verify each measurement.
• Always let the source signal settle before taking a reading.
• Do not connect test equipment to the Model 2000 through a scanner or other switching
equipment.
WARNING The maximum common-mode voltage (voltage between INPUT LO and chas-
sis ground is 500 V peak. Exceeding this value may cause a breakdown in
insulation, creating a shock hazard. Some of the procedures in this section
may expose you to dangerous voltages. Use standard safety precautions
when such dangerous voltages are encountered to avoid personal injury
caused by electric shock.
1-6 Performance Verification

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