Global Specialties 1332A User Manual
Page 8
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
=======================================================================
Ref Designator
Value
========================================================================
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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