Owner's manual

OPERATING INSTRUCTIONS
TURN ON SETTING PROCEDURE
The following procedure describes the use of controls and
indicators.
a. Ensure that the AC power switch is in the "OFF"
position.
b. Connect the unit to a specified input voltage.
c. Turn the VOLTAGE and CURRENT controls fully
counter-clockwise.
d. Set ‘POWER ON’ Switch to "ON" position,The front
panel digital meters will light up and voltmter and
ammeter displays will read zero,and observe that
CV LED glows.
e. Adjust the ”VOLTAGE” controls till the desired
voltage is indicated on voltmeter.
f. To check "CONSTANT CURRENT" mode, turn
OFF the supply. Short circuit the output terminals
of the power supply and turn ON the supply.
g. Adjust 'CURRENT' controls until the desired out
put current is indicated on ammeter. Also check
that the CC LED glows.
h. Remove the short circuit.
CONSTANT VOLTAGE MODE :
To select a constant voltage output, proceed as follows :
a. Connect a digital voltmeter (DVM) across the out
put terminals, observing correct polarity. The DVM
must be rated for better than 0.5% accuracy.
b. Turn the CURRENT controls clockwise. And
Slowly If a load change causes the current limit
to be exceeded, the power supply will automati
cally cross over to constant current output at cur
rent limit and output voltage will drop proportion
ately. In setting the current limit, allowance must
be made for high peak currents which can cause
unwanted crossover.
SECTION 5
PART LIST & SCHEMATICS
PCB Components ZSDT-CT/05 PCB
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Ref Designator Value
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RESISTORS
R1 270E, 2W, 5%, MOR
R2 47E, MFR, 1/4W, 5%
R3 10K, MFR, 1/4W
R4* 1K, MFR, 1/4W, 5%
R5 10E, MFR, 1/4W, 5%
R6 3.9K, MFR, 1/4W
R7 3.3K, 2W, 5%, MOR
R8 10K, MFR, 1/4W
R9 8.2K, MFR, 1/4W
R10 100K, MFR, 1/4W
R11 4.7E, MFR, 1/4W.
R12 1.5K, MFR, 1/4W.
R13 180K, MFR, 1/4W.
R14 390E, MFR, 1/4W.
R15 6.8K, MFR, 1/4W, 5%
R16 12K, MFR, 1/4W, 5%
R17 3.9K, MFR, 1/4W, 5%
R18 10K, MFR, 1/4W
R19 10K, MFR, 1/4W
R20 10K, MFR, 1/4W
R21 3.3K, 2W, 5%, MOR
R22 270E, 2W, 5%, MOR
R23# 82K, MFR, 1/4W, 5%
R24 4.7K, MFR, 1/4W, 5%
R25 24E, MFR, 1/4W, 5%
R26 820E, MFR, 1/4W, 5%
R27# 330K, MFR, 1/4W, 5%
R28# 39K, MFR, 1/4W, 5%
R29# 180K, MFR, 1/4W, 5%
R30 1K, MFR, 1/4W, 5%
R31 15E, MFR, 1/4W, 5%
R32 6.8K, MFR, 1/4W, 5%
R33 15K, MFR, 1/4W, 5%
R34 6.8K, MFR, 1/4W, 5%
R35 15K, MFR, 1/4W, 5%
R36 1K, MFR, 1/4W, 5%
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