Appendix B Verification and Calibration
Constant Voltage Tests
| Refer to the appropriate test record form for the instrument settings of the |
NOTE | |
| model you are checking. |
Voltage Programming and Readback Accuracy
Test category = performance, calibration
This test verifies that the voltage programming and measurement functions are within specifications.
1Turn off the power supply and connect a DVM directly across the +S and
2Turn on the power supply and program the output voltage to zero and the output current to its maximum programmable value (Imax) with the load off. The CV annunciator should be on and the output current reading should be approximately zero.
3Record the output voltage readings on the digital voltmeter (DVM) and the front panel display. The readings should be within the limits specified in the test record card for the appropriate model under Voltage Programming and Readback, Minimum Voltage Vout.
4Program the output voltage to its
5Record the output voltage readings on the DVM and the front panel display. The readings should be within the limits specified in the test record card for the appropriate model under Voltage Programming and Readback, High Voltage Vout.
CV Load Effect
Test category = performance
This test measures the change in output voltage resulting from a change in output current from full load to no load.
1Turn off the power supply and connect a DVM and an electronic load as shown in figure A.
2Turn on the power supply and program the output current to its maximum programmable value (Imax) and the output voltage to its
3Set the electronic load for the output’s
4Record the output voltage reading from the DVM.
5Open the load and record the voltage reading from the DVM again. The difference between the DVM readings in steps 4 and 5 is the load effect, which should not exceed the value listed in the test record card for the appropriate model under CV Load Effect.
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