Appendix C: Calibration and adjustment Series 2280 Precision DC Power Supply Reference Manual
C-2 077085503 / March 2019
Warmup period
Allow the Series 2280 to warm up for at least one hour before performing calibration.
If the instrument has been subjected to temperature extremes (those outside the ranges stated in
Environmental conditions (on page C-1)), allow extra time for the instrument’s internal temperature to
stabilize. Typically, you need to allow one extra hour to stabilize an instrument that is 10 °C outside
the specified temperature range.
Also, allow the test equipment to warm up for the minimum time specified by the manufacturer.
Line power
The Series 2280 requires a line voltage of 100 V, 120 V, 220 V, or 240 V, and a line frequency of
50 Hz or 60 Hz.
Before powering up the instrument, properly set the 100 V/120 V or 220 V/240 V selector switch
located on the rear panel to the appropriate line power position.
Calibration considerations
When performing calibration procedures:
Make sure that the equipment is properly warmed up.
Make sure to use the 4-wire sense connection with shunt during the current calibration process to
guarantee the accuracy.
If an error occurs during a calibration, the Series 2280 generates an appropriate error message.
See Error summary (on page 8-3) for more information.
Calibration cycle
Perform calibration at least once a year to ensure the instrument meets the corresponding
specifications.
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