Performance Verification
Voltage Programming and Readback Accuracy
Constant Voltage Load Effect
Constant Voltage Ripple and Noise
Transient Recovery Time
Current Programming and Readback Accuracy
Constant Current Load Effect
Current Sink Capability Verification
Introduction
Use the performance verification tests to verify that the power supply is operating normally and meets
its published specifications. You can perform two different levels of performance verification tests:
l Self-Test A brief power-on self-test occurs automatically whenever you turn on the instrument.
This limited test assures that the instrument is operational. For details, see Self-Test Procedures.
l Performance Verification Tests An extensive set of tests that are recommended as an acceptance
test when you first receive the instrument or after performing adjustments.
The performance verification tests are recommended as acceptance tests when you first receive the
instrument. The acceptance test results should be compared against the instrument specifications.
After acceptance, you should repeat the performance verification tests at every calibration interval.
Perform the verification tests before calibrating your power system. If the power supply passes the
verification tests, the unit is operating within its calibration limits and does not need to be calibrated.
If the instrument fails any of the tests or if abnormal test results are obtained, try calibrating the unit. If
calibration is unsuccessful, return the unit to a Keysight Technologies Service Center.
Refer to the Recommended Test Equipment and Setups section for a list of the equipment and test
setups required for verification. Refer to the Measurement Techniques section for information about
connecting the voltmeter, current shunt, and load.
Voltage Programming and Readback Accuracy
This test verifies that the voltage programming and measurement functions are within specifications.
Step 1. Turn off the power supply. Connect a DMM to the sense terminals (see Test Setup A). Do not
connect the load.
Step 2. Turn on the power supply and program the instrument settings as described in the test record
form under “Voltage Programming & Readback, Min Voltage”. Turn the output on. The output status
should be “CV” and the output current should be close to zero.
Keysight N6900/N7900 Series Operating and Service Guide 311
7 Verification and Calibration
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