Turn-On Checkout Procedure; Constant Voltage Operation - Protek 3003B Instruction Manual

3. OPERATION
WARNING: Before connecting line power to your power supply, make sure that the AC input voltage is correct for
your power source.

TURN-ON CHECKOUT PROCEDURE.

a) Turn A-adj control fully counter clockwise.
b) Set AC power switch push to on position, digital display and CV lamp should light.
c) Turn VOLTAGE controls fully counter clockwise to ensure that output decreases to OV dc then fully
clockwise to ensure that output voltage increase to the maximum output voltage.
d) While depressing CC SET push button, turn the CURRENT control fully counter clockwise and then fully
clockwise to ensure that the current limit value can be set from zero to maximum rated value.
e) Connect load to output terminals.

CONSTANT VOLTAGE OPERATION

To set up a power supply for a constant voltage operation, proceed as follows:
a) Turn on power supply and adjust V-adj control for desired output voltage (output terminals open). CV lamp
should light.
b) While depressing CC SET push button, adjust A-adj control for maximum output current allowable (current
limit). During actral operation, if a load change causes the current limit to be exceeded, the power supply will
automatically crossover to constant current mode and output voltage will drop proportionately.
c) Push-on DC OUT push button switch for DC voltage output.