Keithley 2700, Service Manual

Page: 18 / 174

1-2 Performance Verification
Introduction
Use the procedures in this section to verify that Model 2700 Multimeter/Data Acquisition
System accuracy is within the limits stated in the instrument’s one-year accuracy specifications.
You can perform these verification procedures:
• When you first receive the instrument to make sure that it was not damaged during ship-
ment, and that the unit meets factory specifications.
• If the instrument’s accuracy is questionable.
• Following calibration.
WARNING The information in this section is intended only for qualified service per-
sonnel. Do not attempt these procedures unless you are qualified to do so.
NOTE If the instrument is still under warranty and its performance is outside specified lim-
its, contact your Keithley representative or the factory to determine the correct
course of action. If the unit is not under warranty, and it fails to meet specified limits,
refer to the calibration procedures in Section 2.
There are three general verification procedures in this section:
• Model 2700 verification : Covers procedures to verify measurement accuracy of the
Model 2700 using the front panel terminals.
• Model 7700 verification : Discusses procedures to verify accuracy of measurement
made through the Model 7700 20-Channel Multiplexer. Note that the same general pro-
cedures can be used to verify measurement accuracy of other Model 2700 plug-in mod-
ules that have similar functions. For specific information about the individual modules,
refer to the appropriate appendices in the Model 2700 User’s Manual.