Ametek Sorensen SGA Series DC, Operation Manual

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M550129-01 Rev AF 4-1
SECTION 4
CALIBRATION AND VERIFICATION
4.1
INTRODUCTION
This section provides calibration and verification procedures for the SGA
Series power supplies and the Remote Isolated Analog Interface control
(option). Refer to the SG Programming Manual for calibration of display
readback and remote digital programming option.
4.1.1 CALIBRATION AND VERIFICATION CYCLE
Annual calibration and verification is recommended. Calibrate only as
needed.
4.1.2 PREPARATION
WARNING!
Hazardous voltages exist at the rear of the supply. Care must be
taken to avoid contact with the AC input and DC output terminals.
Only authorized personnel should perform this procedure.
Only technically trained personnel, who understand the operation of the
power supply and are capable taking accurate readings should perform
calibration. The calibration procedures require two digital multimeters and
a precision shunt for measurement of voltage and current. To set up for
the calibration procedures, perform the following initial steps:
1. Disconnect AC mains power.
2. Connect a precision current shunt, that is suitably derated, across the output of
the power supply; a fan might be required to cool the shunt. Connect remote