Scientific PSD4032A User manual

32V 3 A DC Power Supply
PSD4032A
User Manual

Copyright © Scientific All rights reserved.
This instrument contains proprietary information, no part of this manual may be
photocopied, reproduced or translated without any prior written consent.
Information in this manual supercede all corresponding previous released
material.
Scientific continues to improve products & reserves rights to amend part or all of
the specifications, procedures, equipment at any time without notice.
Ver 1.01 / 0717
Scientific Mes-Technik Pvt. Ltd.,
B-14, Industrial Estate, Pologround,
Indore 452015 (India)
Tel : [phone]/33
Fax : [phone],561641
Email : [email protected]
Website: www.scientificindia.com
User Manual PSD4032A
2

32 V 3 A Power Supply
PSD4032A
Table of Contents
1. Introduction 4
2. Technical Specifications 5
3. Front Panel Controls 7
4. Operating Instructions 9
5. General Information 9
6. Safety 9
7. Operating Conditions 10
8. First Time Operation 10
9. Operation 10
10. Maintenance 11
11. Power Line Fuse Replacement 11
12. Despatch Procedure for Service 12
13. Warranty Conditions 13
3
User Manual PSD4032A

32 V., 3 A DC Power Supply
PSD4032A
l Floating DC supply voltage
l Constant voltage and constant current mode operation
l Individual display for voltage and current
l Adjustable current limiter
l Overload and short circuit protection
l Output ON/OFF control
l Wide mains operation 190-270 V AC
The PSD4032A is 32 V, 3 A DC Power supply. The power supply is designed as a
constant current (CC) and constant voltage (CV), source for laboratories,
industries and field testing applications, featuring Low Power Loss, compact and
light weight.
The DC output can be continuously adjusted from 0 to 32 V with coarse and fine
controls. Current limit is also adjustable from 0-3 A. Any over loading for adjusted
current limit is indicated by "CC" LED. When the maximum setting is crossed, the
LED will lit.
Separate displays for each channel are provided to show voltage and current
readings. Voltage and current, both displays are 3-digit display. In addition to low
residual ripple and noise as well as excellent line and load regulation, the
PSD4032A is provided with all protective circuits to ensure trouble free operation.

Technical Specifications
DC Output : 0-32 V / 0-3 A
Continuously variable by means of coarse and
fine controls
Output Current : 0 - 3 A (Max.)
Setting Resolution : Voltage : 10 mV Current : 5 mA
Constant Voltage Mode
Load Regulation : < + (0.01% + 10 mV)*
Line Regulation : < + (0.01% + 10 mV)*
Ripple and Noise : < 0.5 mVrms
Transient Response : < 50 ms output within 50 mV from full load to
half load & vice versa
Drift : < + (0.2%+ 5 mV) within 8 hrs. Warm up at
constant line, load & ambient temperature
condition
Constant Current Mode
Load Regulation : < + (0.2% + 3 mA)
Line Regulation : < + (0.2% + 3 mA)
Ripple & Noise : < 3 mArms
Drift : < + (0.5%+5 mA) within 8 hrs. Warm up at
constant line, load & ambient temperature
condition
0
Temperature Coefficient : < + (0.05% + 10 mV/ C)
Current Limit Adjustment : 100 mA to max approx
5
User Manual PSD4032A

Display : Individual 3 digit seven segment LED for
voltage & current of all channels
Resolution : Volatge : 100 mV, Current : 10 mA
Accuracy : V : + (1%+1D), I : + (1%+3D)
General Information : Built-in overheat, over voltage protections.
Cooling natural convection
Insulation : Between chassis and output terminal > 10 MW
at 100 V DC
Between chassis and AC plug > 50 MW at 500V
DC
Supply : 190 VAC to 270 VAC/ 50 Hz
Operating Conditions : 0 - 50° C , RH 95 %
Dimension : W : 196, H : 80, D : 340 (mm)
Weight : 3.75 kg (approx.)
Accessories : User Manual, Spare Fuse, Connecting Cables
Note : * For line variation 230±10%
User Manual PSD4032A
6

7
User Manual PSD4032A
Front Panel Controls
32.0
3.00
12345678
1. Power : Switch for switching On/Off mains supply to the instrument.
2. Display Window : Digital Display to display voltage and current
simultaneously of Power Supply.
3. CV & CC LED : When supply is used in constant voltage mode the “CV”
LED lits and “CC” LED gets off. Similarly when supply is used in constant
current mode the “CC” LED lits and “CV” LED gets off.
4. Coarse : Potentiometer to adjust the output voltage with coarse
resolution.
5. Fine : Potentiometer to adjust the output voltage with fine resolution.
Adjustment range limit upto 2.0 V
6. Iset : Potentiometer for current limit setting. Adjustment range 0.1 A to
3.00 A.
7. Output ON/OFF LED & Push Button : When pressed the DC output is
available on terminals, with LED indication.
8. Terminals : Output terminals

8
User Manual PSD4032A
Rear Panel Controls
9
9 Mains Fuse : Mains fuse , when open replace it with appropriate rating.
10 Mains Inlet : Mains input to the power supply.
10

9
User Manual PSD4032A
Operating Instructions
General Information
The logical front panel layout of PSD4032A ensures rapid familiarization with the
various functions. However, even experienced operators should not neglect to
carefully read the following instructions, to avoid any operational errors and to be
fully acquainted with the instrument when later in use.
After unpacking the instrument, check for any mechanical damage or loose parts
inside. Should there be any transportation damage, inform the supplier
immediately and do not put the instrument into operation.
Safety
The case chassis and all measuring parts are connected to the protective earth
contact of the inlet. The mains plug shall only be inserted in a socket outlet
provided with a protective earth contact. The protective action must not be negated
by the use of an extension cord without a protective conductor.
Warning!
Any interruption of the protective conductor inside or outside the instrument or
disconnection of the protective earth terminal is likely to make the instrument
dangerous. Intentional interruption is prohibited.
When removing the metal case or replacing, the instrument must be completely
disconnected from the mains supply. If any measurement or calibration
procedures are unavoidable on the opened-up instrument, qualified personnel
acquainted with the danger involved must only carry these out.

User Manual PSD4032A
10
Operating Conditions
The ambient temperature range during operation should be between + 0 to +50°C
and should not exceed. - 40°C or + 70°C during transport or storage. The
operational position is optional, however, the ventilation holes on the PSD4032A
must not be obstructed.
First Time Operation
After unpacking the instrument check for any mechanical damages. The
instrument should be plugged in mains-plug of proper mains supply 230V + 10%.
On switch ON no undue observation should be noticed. Once the instrument is
switched ON the power ON is indicated by liting of display.
Operation
The power supply PSD4032A has electrically floating outputs. This permits easy
series or parallel connection with other power supply units, to increase supply
voltage or current respectively.
Constant Voltage Mode Operation :
The output voltage is unchanged / constant for load current applied up to the set
current value. Constant voltage mode is indicated by CV (LED) On.
Constant Current Mode Operation :
When the load current is increased more than the set current limit then output
voltage starts decreasing with respect to increase in load current. Constant current
mode is indicated by CC (LED) On.

11
User Manual PSD4032A
Maintenance
There are no user serviceable part inside PSD4032A. Your PSD4032A Power
Supply is thoughtfully engineered for ease of use, accuracy and reliability. The
instrument is carefully tested and calibrated using standards traceable to National
Laboratories.
Take care of your instrument by cleaning the exterior of the instrument regularly
with a dusting brush. Dirt which is difficult to remove on the casing & plastic parts,
can be removed with a moist cloth ( 99% water, 1% mild detergent) spirit or
washing benzene(petroleum ether) can be used to remove greasy dirt. The display
may be cleaned with water or washing benzene (but not with spirit-alcohol
solvents), it must then be wiped with a dry clean lint-free cloth. Under no
circumstances the cleaning fluid should get into the instrument. The use of
cleaning agents can attack the plastic & paint surfaces.
Power Line Fuse Replacement
The power line fuse is located on rear panel on lower right side. In case, the
instrument does not show any sign of working, no LED is lit or there is no display,
immediately switch OFF the mains power switch of the instrument and unplug the
mains cord from the mains socket.
With the help of small flat blade screwdriver remove the fuse cap of the fuse holder,
located just below the socket. There is one spare fuse kept in the fuse cap, replace
it for the defective one. Turn the cap so that it locks in place . The rating of the fuse is
2 A , 250V , sloblo , 5x20 mm glass fuse. Do not use a fuse with a higher value other
wise it may damage the instrument in case, the mains voltage goes much higher
than the rating of the mains fluctuation of + 10% .

User Manual PSD4032A
12
Despatch Procedure for Service
No user serviceable parts are inside the instrument, should it become necessary to
send back the instrument to factory for service, please observe the following
procedure.
Before dispatching the instrument please write to us giving full details of the fault
noticed.
1. After receipt of your communication, our service department will advise you
Whether it is necessary to send the instrument back to us for repairs or the
Adjustment is possible in your premises.
2. Dispatch the instrument (only on the receipt of our advise) securely packed in
original packing duly insured and freight paid along with accessories and a
copy of the faults details noticed at our Service Center listed on last page of this
manual, nearest to you.

13
User Manual PSD4032A 13
Warranty Conditions
1. Scientific warrants all its Instruments to be free from defects in material and
workmanship when used under normal operating conditions in accordance
with the instructions given in the manual for a period of 12(Twelve) months from
date of purchase from Scientific or its authorised dealers. The service during the
warranty period will be rendered on return to factory/service center basis.
2. Its obligation under this warranty is limited to repairing or replacing at its own
discretion.This warranty shall not apply to any defect, failure or damage caused b y
accident, negligence, mis-application, alteration or attempt torepair, service
or modify in any way.
3. This warranty does not include LED, fuses, batteries or accessories. This
warranty is only valid with the original purchaser who must have properly
registered the product within 15 days from date of purchase. No other warranty i s
expressed or implied.
4. When it becomes necessary to return the instrument to our Factory facility, kindly
pack it carefully in the original carton or equivalent and ship it duly insured,
transportation charges prepaid.
5. Your Scientific instrument is a complex electronic device and deserves the best
service available by technicians thoroughly familiar with its service and
calibration procedures. Scientific warrants all its Instruments to be free from
defects in material and workmanship when used under normal conditions.