GW Instek GPD-2303S User manual

DC Power Supply
GPD-X303S Series
USER MANUAL
GW INSTEK PART NO. 82PD-433S0M01
ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by
copyrights. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will company.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves the
rights to change specification, equipment, and maintenance
procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan (R.O.C).

TABLE OF CONTENTS
Table of Contents
SAFETY INSTRUCTIONS ................................................... 5
OVERVIEW...................................................................... 10
Introduction......................................... 10
Series Lineup / Main Features ............. 13
Principle of Operation.......................... 14
Front Panel Overview ........................... 16
Rear Panel Overview ............................ 21
CV/CC Crossover Characteristics ......... 22
SETUP............................................................................. 23
Power Up ............................................. 23
Load Cable Connection ........................ 24
Output On/Off..................................... 25
Beep On/Off ........................................ 25
Switch between channels ..................... 26
Front Panel Lock .................................. 26
OPERATION.................................................................... 27
CH1/CH2 Independent Mode .............. 27
CH3 Independent Mode....................... 29
CH4 Independent Mode....................... 31
CH1/CH2 Tracking Series Mode........... 33
CH1/CH2 Tracking Parallel Mode ........ 39
SAVE/RECALL SETUP ...................................................... 41
Save Setup ........................................... 41
Recall Setup......................................... 42
REMOTE CONTROL ........................................................ 43
Remote Control Setup.......................... 43
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GPD-X303S Series User Manual
4
Remote Connection Step...................... 44
Command Syntax ................................. 46
Error Messages .................................... 46
Command List...................................... 47
Command Details ................................ 48
FAQ ................................................................................ 53
APPENDIX ...................................................................... 54
Fuse Replacement ................................ 54
Specifications ...................................... 55
Declaration of Conformity .................... 57
INDEX............................................................................. 58

SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
This chapter contains important safety instructions
that you must follow when operating the GPD-
X303S series and when keeping it in storage. Read
the following before any operation to insure your
safety and to keep the best condition for the GPD-
X303 series.
Safety Symbols
These safety symbols may appear in this manual or on the GPD-
X303S series.
WARNING Warning: Identifies conditions or practices that
could result in injury or loss of life.
CAUTION Caution: Identifies conditions or practices that
could result in damage to the GPD-X303S series or
to other properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal
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GPD-X303S Series User Manual
Do not dispose electronic equipment as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased.
Safety Guidelines
General
Guidelines
CAUTION
•Do not place any heavy object on the GPD-
X303S series.
•Avoid severe impacts or rough handling that
leads to damaging the GPD-X303S series.
•Do not discharge static electricity to the GPD-
X303S series.
•Do not block or obstruct the cooling fan vent
opening.
•Do not perform measurement at circuits directly
connected to Mains (see note below).
•Do not disassemble the GPD-X303S series unless
you are qualified as service personnel.
(Measurement categories) EN 61010-1:2001 specifies the
measurement categories and their requirements as follows. The
GPD-X303S series falls under category I.
•Measurement category IV is for measurement performed at the
source of low-voltage installation.
•Measurement category III is for measurement performed in the
building installation.
•Measurement category II is for measurement performed on the
circuits directly connected to the low voltage installation.
•Measurement category I is for measurements performed on
circuits not directly connected to Mains.
Power Supply
WARNING
•AC Input voltage: 100V/120V/220V/230V
±10%, 50/60Hz
•Connect the protective grounding conductor of
the AC power cord to an earth ground, to avoid
electrical shock.
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SAFETY INSTRUCTIONS
Fuse
WARNING
•Fuse type: 100V/120V: T6.3A/250V,
220V/230V: T3.15A/250V
•Make sure the correct type of fuse is installed
before power up.
•To ensure fire protection, replace the fuse only
with the specified type and rating.
•Disconnect the power cord before fuse
replacement.
•Make sure the cause of fuse blowout is fixed
before fuse replacement.
Cleaning the
GPD-X303S
series
•Disconnect the power cord before cleaning.
•Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid.
•Do not use chemicals or cleaners containing
harsh products such as benzene, toluene, xylene,
and acetone.
Operation
Environment
•Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (note below)
•Relative Humidity: < 80%
•Altitude: < 2000m
•Temperature: 0°C to 40°C
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GPD-X303S Series User Manual
(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees
and their requirements as follows. The GPD-X303S series falls under
degree 2.
Pollution refers to “addition of foreign matter, solid, liquid, or
gaseous (ionized gases), that may produce a reduction of dielectric
strength or surface resistivity”.
•Pollution degree 1: No pollution or only dry, non-conductive
pollution occurs. The pollution has no influence.
•Pollution degree 2: Normally only non-conductive pollution
occurs. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
•Pollution degree 3: Conductive pollution occurs, or dry, non-
conductive pollution occurs which becomes conductive due to
condensation which is expected. In such conditions, equipment
is normally protected against exposure to direct sunlight,
precipitation, and full wind pressure, but neither temperature
nor humidity is controlled.
Storage
environment
•Location: Indoor
•Relative Humidity: < 70%
•Temperature: −10°C to 70°C
Disposal
Do not dispose this instrument as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased. Please make sure
discarded electrical waste is properly recycled to
reduce environmental impact.
8

SAFETY INSTRUCTIONS
Power cord for the United Kingdom
When using the GPD-2303S/GPD-3303S/GPD-4303S series in the
United Kingdom, make sure the power cord meets the following
safety instructions.
NOTE: This lead/appliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with the
following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)
As the colours of the wires in main leads may not correspond with the colours
marking identified in your plug/appliance, proceed as follows:
The wire which is coloured Green & Yellow must be connected to the Earth
terminal marked with the letter E or by the earth symbol or coloured Green or
Green & Yellow.
The wire which is coloured Blue must be connected to the terminal which is
marked with the letter N or coloured Blue or Black.
The wire which is coloured Brown must be connected to the terminal marked
with the letter L or P or coloured Brown or Red.
If in doubt, consult the instructions provided with the equipment or contact the
supplier.
This cable/appliance should be protected by a suitably rated and approved HBC
mains fuse: refer to the rating information on the equipment and/or user
instructions for details. As a guide, cable of 0.75mm2should be protected by a 3A
or 5A fuse. Larger conductors would normally require 13A types, depending on
the connection method used.
Any moulded mains connector that requires removal /replacement must be
destroyed by removal of any fuse & fuse carrier and disposed of immediately, as
a plug with bared wires is hazardous if a engaged in live socket. Any re-wiring
must be carried out in accordance with the information detailed on this label.
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GPD-X303S Series User Manual
OVERVIEW
This chapter describes the GPD-2303S/GPD-
3303S/GPD-4303S series in a nutshell, including
its main features and front / rear panel
introduction. After going through the overview,
follow the Setup chapter (page23) to properly
power up and set operation environment.
Introduction
Overview The GPD-X303S regulated DC power supply series
are light weight, adjustable, multifunctional work
stations. The GPD-2303S has a 2 independent
adjustable voltage outputs. The GPD-3303S three
independent outputs: two with adjustable voltage
levels and one with fixed level selectable from
2.5V, 3.3V and 5V. The GPD-4303S has four
independent voltage outputs that are all fully
adjustable. The GPD-X303S series can be used for
logic circuits where various output voltage or
current are needed, and for tracking mode
definition systems where plus and minus voltages
with insignificant error are required.
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OVERVIEW
Independent /
Tracking Series /
Tracking Parallel
The three output modes of GPD-X303S series,
independent, tracking series, and tracking parallel,
can be selected through pressing the TRACKING
key on the front panel. In the independent mode,
the output voltage and current of each channel are
controlled separately. The isolation degree, from
output terminal to chassis or from output terminal
to output terminal, is 500V. In the tracking modes,
both the CH1 and CH2 outputs are automatically
connected in series or parallel; no need to connect
output leads. In the series mode, the output
voltage is doubled; in the parallel mode, the
output current is doubled.
Constant Voltage/
Constant Current
Each output channel is completely transistorized
and well-regulated, and works in constant voltage
(CV) or constant current (CC) mode. Even at the
maximum output current, a fully rated,
continuously adjustable output voltage is
provided. For a big load, the power supply can be
used as a CV source; while for a small load, a CC
source. When in the CV mode (independent or
tracking mode), output current (overload or short
circuit) can be controlled via the front panel. When
in the CC mode (independent mode only), the
maximum (ceiling) output voltage can be
controlled via the front panel. The power supply
will automatically cross over from CV to CC
operation when the output current reaches the
target value. The power supply will automatically
cross over from CC to CV when the output voltage
reaches the target value. For more details about
CV/CC mode operation, see page22.
Automatic
tracking mode
The front panel display (CH1, CH2) shows the
output voltage or current. When operating in the
tracking mode, the power supply will
automatically connect to the auto- tracking mode.
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GPD-X303S Series User Manual
Dynamic load When used in audio production lines, the power
supply can provide a continuous or dynamic load
using a jumper connector (JP101/JP401). When the
jumper connectors are connected to the “ON”
position (shorted), a stable DC current power will
be provided for audio power amplifiers.
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OVERVIEW
Series Lineup / Main Features
Main Features
Performance •Low noise: Temperature controlled cooling fan
•Compact size, light weight
Operation •Constant Voltage / Constant Current operation
•Tracking Series / Tracking parallel operation
•Output On/Off control
•Multi-output:
GPD-2303S: 30V/3A x2;
GPD-3303S: 30V/3A x2, 2.5V/3.3V/5V/3A x 1
GPD-4303S: 30V/3A x2, 5V/1A x1, 5V/3A
(10V/1A) x1
•Digital panel control
•4 sets of panel setup save/recall
•Coarse and fine Voltage/Current control
•Software calibration
•Buzzer output
•Key lock function
Protection •Overload protection
•Reverse polarity protection
•Overvoltage protection
Interface •USB for remote control
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GPD-X303S Series User Manual
Principle of Operation
Overview The power supply consists of the following.
•AC input circuit
•Transformer
•Bias power supply including rectifier, filter,
pre-regulator and reference voltage source
•Main regulator circuit including the main
rectifier and filter, series regulator, current
comparator, voltage comparator, reference
voltage amplifier, remote device and relay
control circuit
The block diagram below shows the circuit
arrangement. The single phase input power is
connected to the transformer through the input
circuit. Details of each part are described in the
next page.
Block diagram
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OVERVIEW
Auxiliary Rectifier
The auxiliary rectifiers D1011~ D1014 provide bias
voltage filtered by the capacitors C102 and C103,
for the pre-regulators U101 and U102. They
provide a regulated voltage for other modules.
Main Rectifier The main rectifier is a full wave bridge rectifier. It
provides the power after the rectifier is filtered by
the capacitor C101, and then regulated via a series-
wound regulator, which is finally delivered to the
output terminal.
Current Limiter U104 acts as a current limiter. When the current is
over predetermined rating, U104 is activated and
decreases the current. U208 provides a reference
voltage. U206 is an inverter amplifier. U103 is a
comparator amplifier which compares the
reference voltage to the feedback voltage, and then
delivers it to Q102, which then calibrates the
output voltage.
Overload When the unit is overloaded, Q107 activates to
control the current magnitude of Q102, to limit the
output current. The relay control circuit controls
the power dissipation in the series-wound
regulated circuit.
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GPD-X303S Series User Manual
Front Panel Overview
VoltMeter Ammeter Memory Keys
Voltage
Knobs
Current
Knobs
Parallel
Keys
CH1/CH3, CH2/
CH4(Beep) Keys
Output Key
Lock Key
CH3 CV/CC
Indicator
CH3 Output
CH1 CV/CC
Indicator
CH1 OutputCH2 Output
CH2 CV/CC/PAR
Indicator
CH4 Output
CH4 CV/CC
Indicator
GND Terminal
Series Keys
Power
Switch
Channel
Indicator
Display
Voltmeter Displays output voltage of each channel.
GPD-4303S: CH1/CH3 and CH2/CH4
GPD-2303S/3303S: CH1 and CH2
5 digits:
Ammeter Displays output current of each channel.
GPD-4303S: CH1/CH3 and CH2/CH4
GPD-2303S/3303S: CH1 and CH2
4 digits:
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OVERVIEW
Control Panel
Memory Keys
Saves or recalls panel settings. Four
settings, 1 ~ 4, are available. For
save/recall details, see page41.
CH1/CH2
GPD-2303S/2303S: Selects the output
channel (CH1/CH2) for level
adjustment. For level setting details,
see page27.
CH1/3 and
CH2/4
GPD-4303S: Selects the output
channel (CH1/3 and CH2/4) for
level adjustment. For level setting
details, see page27.
Beep Keys
Pressing and holding the CH2
(2303S/3303S) or the CH2/4 key
(4303S) enables the beeper sound. For
details, see page25.
Parallel/Series
Keys
Activates Tracking Parallel operation
or Tracking Series operation, For
details, see page33.
Lock Key
Locks or unlocks the front panel keys
(excluding the OUTPUT key).
Pressing the LOCK key will also exit
remote mode if the machine is in
remote mode. For details, see page26.
Output Key
Turns the output on or off.
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GPD-X303S Series User Manual
Voltage Knobs
Adjusts the output voltage level for
the selected channel. Pressing the
knob switches coarse and fine level
setting.
Current Knobs
Adjusts the output current level for
the selected channel. Pressing the
knob switches coarse and fine level
setting.
Power Switch
Turns On or Off the main power.
For power up sequence, see page23.
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OVERVIEW
Terminals
Default Terminals
European Terminals
GND
Terminal
Accepts a grounding wire.
CH1 CV/CC
Indicator
Indicates CH1 Constant
Voltage or Constant Current
state.
CH1 Output
Outputs CH1 voltage and
current.
CH2
CV/CC/PAR
Indicator
Indicates CH2 Constant
Voltage, Constant Current,
or Tracking Parallel
operation mode.
CH2 Output
Outputs CH2 voltage and
current.
CH3 CV/CC
Indicator
Indicates CH3 Constant
Voltage or Constant Current
state for the GPD-4303S.
CH3 Output
Outputs CH3 voltage and
current.
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GPD-X303S Series User Manual
CH3
Overload
Indicator
Indicates when CH3 (3303S)
output current is overloaded.
CH3 Voltage
Selector
Selects CH3 output voltage
for the GPD-3303S: 2.5V,
3.3V, or 5V.
CH4 CV/CC
Indicator
Indicates CH4 constant
voltage or constant current
for the GPD-4303S.
CH4 Output
Outputs CH4 voltage and
current.
Channel
Indicator
Indicates which channel the
2 LED voltmeters/ammeters
represent.
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