B&K Precision 1747 - Manual - Manual (Page 24)

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6.2 Adjustments
This unit was accurately adjusted at the factory before shipment. Readjustment is
recommended only if repairs have been made in a circuit affecting adjustment
accuracy, or if you have a reason to believe the unit is out of adjustment. However,
adjustments should be attempted only if a multimeter with an accuracy of ±0.02%
DCV or better is available (B&K Precision Model 5491B or equivalent).
6.3 Calibration
Calibration is a procedure that ensures that the power supply will work properly,
with parameters specified within the Specifications section.
Before initiating the calibration procedure, the following conditions must be assured:
• Disconnect any loads connected to the power supply and turn it on
• Let the power supply be turned on for 1 hour with no loads connected
before you start the calibration procedure
• Calibration ambient temperature must be 25°C
• Ambient relative humidity must be less than 80%
To calibrate the power supply, complete the following steps:
1. Turn on the power supply in calibrating mode
2. Zero voltage calibration
3. Full voltage calibration
4. Low current calibration
5. Full current calibration
6. Leaving the Calibration menu
1. Turn on the power supply in calibrating mode
a) Turn off the power supply. Disconnect the power cord and all loads
connected to the power supply.
b) Turn on the power supply with the Output On-Off button pressed and keep
it pressed at least 10 s.