E16
If readjustment is required, use the following procedure. Locations of the adjustments are shown in Fig. 5-1 and Fig. 5-
2.
(1) Adjustment of the Rating Voltage
A. Connect an accurate (±0.1%) external multimeter to measure the DC voltage at output terminals of the power
supply.
B. Set the COARSE and FINE VOLTAGE controls to minimum (fully counterclockwise).
C. Adjust trimmer pot VR106 for a reading of 0 volts on the multimeter.
D. Turn the COARSE and FINE VOLTAGE controls to maximum (fully clockwise).
E. Adjust trimmer pot VR105 for a reading of rate volts × 1.05 on the multimeter.
F. Set the COARSE and FINE VOLTAGE controls for a reading of rate volts on the multimeter.
G. Adjust trimmer pot VR301 (VR201 digital type) for a reading of rate volts on the voltmeter (Digital panel
meter, digital type) of the power supply.
(2) Adjustment of the Rating Current
A. Set the CURRENT control to minimum (fully counterclockwise).
B. Connect the external multimeter to measure DC current at the output terminals of the power supply.
C. Set the COARSE and FINE CURRENT controls to minimum (fully counterclockwise).
D. Adjust trimmer pot VR107 for a reading of 0 amps on the multimeter.
E. Set the COARSE and FINE VOLTAGE controls to a centered position.
F. Set the COARSE and FINE CURRENT controls to maximum (fully clockwise).
G. Adjust trimmer pot VR108 for a reading of 1/2 rate amps × 1.05 on the multimeter (LO current).
H. Adjust trimmer pot VR109 for a reading of rate amps × 1.05 on the multimeter (HI current).
I. Readjust the CURRENT control for a reading of rate amps on the multimeter.
J. Adjust trimmer pot VR110 (HI), VR111 (LO) to calibrate the Ammeter or Digital panel meter of the power
supply for the same reading as the multimeter.
5-4 Cleaning
To clean the power supply, use a soft cloth dampened in a solution of mild detergent and water. Do not spray cleaner
directly onto the instrument, since it may leak into the cabinet and cause damage. Do not use chemicals containing
benzine, benzene, toluene, xylene, acetone, or similar solvents. Do not use abrasive cleaners on any portion of the
power supply.
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