Chapter 3 Calibration Procedures
Test Considerations
45
3
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 26
in chapter 2 for more information.
• Ensure the calibration ambient temperature is stable and between 20°C and 30°C.
• Ensure ambient relative humidity is less than 80%.
• Allow a 1-hour warm-up period before verification or calibration.
• Keep cables and test leads as short as possible, consistent with the impedance
requirements.
• Use shielded cables to connect the monitoring device such as oscilloscope or RMS
voltmeter to the power supply.
• Ensure all the devices are firmly connected. The alligator or crocodile clip is not
recommended for use in device connection.
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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