Chapter 3 Calibration Procedures
Test Considerations
46
You can also enter cal ib ration constants from the remote i nterface. Rem ote
operation is similar to the local front-panel procedure. Y ou can use a computer
to perform the adjustment by first selecting the required setup. The calibration
value is sent to the power supply and then the calibration is initiated over the
remote interface. The power supply must be unsecured prior to initiating the
calibration procedure. An example program of Excel 97 for calibration over
the GPIB interface is listed at the end of this chapter.
For further details on programming the power supply, see chapters 3 and 4 in
the
Agile nt E 3633A and E 3634A Use r’s Guide
.
Test Considerations
To ensure proper instrument operation, verify that you have selected the
correct power-line voltage prior to attempting any test procedure in this
chapter. See page 24 in chapter 2 for more information.
Ensure that all connections of terminals (both front panel and rear panel) are
removed whil e the pow er suppl y internal self- test is bein g performed.
For optimum performance verification, all test procedures should comply with
the following recommendations:
• Assure that the calibration ambient temperature is stable and between 20°C
and 30°C.
• Assure ambient relative humidity is less than 80%.
• Allow a 1-hour warm-up period before verification or calibration.
• Use short cables to connect test set-ups .
Caution The tests should be performed by qualified personnel. During performance
verification tests, hazardous voltages may be present at the outputs of the power
supply.
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