Keithley 2303, Service Manual, Page: 16 / 104

Performance Verification 1-5
Performing the verification test procedures
Test summary
• DC voltage output accuracy
• DC voltage readback accuracy
• DC current output accuracy
• DC current readback accuracy
• Digital voltmeter input accuracy
If the Model 2303 is not within specifications and not under warranty, see the calibration pro-
cedures in Section 2 for information on calibrating the unit.
Test considerations
When performing the verification procedures:
• Make sure that the test equipment is properly warmed up and connected to the correct
Model 2303 terminals on the rear panel. Also be sure the test equipment is set up for the
proper function and range.
• Do not connect test equipment to the Model 2303 through a scanner, multiplexer, or
other switching equipment.
• Be sure that the power supply output is turned on before making measurements.
• Allow the power supply output signal to settle before making a measurement.
Instrument programming
Refer to Appendix D for basic information on programming the Model 2303, 2303B, or
2303-PJ from the front panel or over the bus.
Output voltage accuracy
Follow the steps below to verify that Model 2303, 2303B, or 2303-PJ output voltage accuracy
is within specified limits. This test involves setting the output voltage to specific values and mea-
suring the voltages with a precision digital multimeter.
1. With the power off, connect the digital multimeter to the Model 2303 OUTPUT
SOURCE terminals, as shown in Figure 1-2. Be sure to observe proper polarity
( to INPUT HI; SOURCE - to INPUT LO).
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