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DC Power Supply
GPD-3303 Series
USER MANUAL
GW INSTEK PART NO.
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 City, Taipei County 236, Taiwan.
TABLE OF CONTENTS
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Table of Contents
GPD-3303 Series User Manual
Error Messages ....................................27H38
Command List......................................28H39
Command Details ................................ 29H40
SAFETY INSTRUCTIONS .................................................. 5
OVERVIEW....................................................................... 9
Introduction........................................... 9
Series Lineup / Main Features ............. 11
Principle of Operation.......................... 12
Front Panel Overview........................... 14
Rear Panel Overview ............................ 17
CV/CC Crossover Characteristics ......... 18
SETUP ........................................................................... 19
Power Up ............................................. 19
Load Cable Connection ........................ 20
Output On/Off..................................... 21
Beep On/Off ........................................ 21
Front Panel Lock ..................................22
OPERATION .................................................................. 23
CH1/CH2 Independent Mode .............. 23
CH3 Independent Mode....................... 25
CH1/CH2 Tracking Series Mode........... 27
CH1/CH2 Tracking Parallel Mode ........19H32
FAQ................................................................................30H45
APPENDIX......................................................................31H46
Fuse Replacement................................ 32H46
Specifications ......................................33H47
Declaration of Conformity.................... 34H49
INDEX ............................................................................35H50
SAVE/RECALL SETUP ..................................................... 20H34
Save Setup ...........................................21H34
Recall Setup......................................... 22H35
REMOTE CONTROL....................................................... 23H36
Remote Control Setup.......................... 24H36
Remote Connection Step...................... 25H37
Command Syntax ................................. 26H38
3
4
SAFETY INSTRUCTIONS
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GPD-3303 Series User Manual
SAFETY INSTRUCTIONS
This chapter contains important safety instructions
that you must follow when operating the GPD3303 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 GPD3303 series.
Safety Symbols
These safety symbols may appear in this manual or on the GPD-3303
series.
WARNING
CAUTION
Warning: Identifies conditions or practices that
could result in injury or loss of life.
Caution: Identifies conditions or practices that
could result in damage to the GPD-3303 series or
to other properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Safety Guidelines
General
Guidelines
CAUTION
Power Supply
WARNING
• Do not place any heavy object on the GPD-3303
series.
• Avoid severe impacts or rough handling that
leads to damaging the GPD-3303 series.
• Do not discharge static electricity to the GPD-
3303 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-3303 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-3303 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.
• 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.
Earth (ground) Terminal
Fuse
• Fuse type: 100V/120V: T6.3A/250V,
220V/230V: T3.15A/250V
WARNING
• Make sure the correct type of fuse is installed
before power up.
5
6
SAFETY INSTRUCTIONS
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GPD-3303 Series User Manual
Cleaning the
GPD-3303 series
Operation
Environment
• 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.
• 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.
• Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (note below)
• Relative Humidity: < 80%
• Altitude: < 2000m
• Temperature: 0°C to 40°C
(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees
and their requirements as follows. The GPD-3303 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
Power cord for the United Kingdom
When using the GPD-3303 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
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 0.75mm
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.
or coloured Green or
2
should be protected by a 3A
7
8
OVERVIEW
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GPD-3303 Series User Manual
OVERVIEW
This chapter describes the GPD-3303 series in a
nutshell, including its main features and front /
rear panel introduction. After going through the
overview, follow the Setup chapter (page19) to
properly pow
Introduction
Overview
Independent /
Trac ki ng S er ie s /
Tracking Parallel
GPD-3303, the regulated DC power supply series,
are light weight, adjustable, multifunctional work
stations. They have three independent outputs:
two with adjustable voltage level and one with
fixed level selectable from 2.5V, 3.3V and 5V. The
GPD-3303 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.
The three output modes of GPD-3303 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 300V. 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.
er up and set operation environment.
Constant Voltage/
Constant Current
matic
Auto
tracking mode
Dynamic load
Except for CH3, 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 page18.
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.
When used in audio production lines, the power
supply will provide a continuous or dynamic load
connector. When the connectors are connected to
the position “ON”, a stable DC current power will
be provided for audio power amplifiers.
9
10
OVERVIEW
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GPD-3303 Series User Manual
Series Lineup / Main Features
Series Lineup
Model V Meter A Meter USB Tracking Error
GPD-3303D 3 digit 3 digit Yes
GPD-3303S 5 digit 4 digit Yes
Main Features
Performance
Operation
• Low noise: Cooling fan controlled by Heatsink
temperature
• Compact size, light weight
• Constant Voltage / Constant Current operation
• Tracking Series / Tracking parallel operation
• Output On/Off control
• 3 outputs: 30V/3A x 2, 2.5V/3.3V/5V/3A x 1
• Digital panel control
• 4 sets of panel setup save/recall
≤ 0.5% + 50mV of Master
≤ 0.5% + 10mV of Master
Principle of Operation
Overview
Block diagram
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.
• Coarse and fine Voltage/Current control
• Software calibration
• Buzzer output
• Key lock function
Protection
Interface
• Overload protection
• Reverse polarity protection
• USB for remote control
11
12
OVERVIEW
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GPD-3303 Series User Manual
Rectifier
Main Rectifier
Current Limiter
Overload
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.
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 serieswound regulator, which is finally delivered to the
output terminal.
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 the inverter amplifier. U103 is a
comparator amplifier which compares reference
voltage and feedback voltage, and then delivers to
Q103, Q104, which then calibrates the output
voltage.
When the unit is overloaded, Q107 activates to
control the current magnitude of Q104, to limit the
output current. The relay control circuit controls
the power dissipation in the series-wound
regulated circuit.
Front Panel Overview
Display
Vol tMeter
GPD-3303S (5 digits)
Displays CH1 or CH2 output voltage.
GPD-3303D (3 digits)
13
AmpMeter
GPD-3303S (4 digits)
14
Displays CH1 or CH2 output current.
GPD-3303D (3 digits)
OVERVIEW
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GPD-3303 Series User Manual
Control Panel
Memory Keys
CH1/CH2/Beep
ys
Ke
Parallel/Se
ries
Keys
Lock Key
Output Key
Saves or recalls panel settings. Four
settings, 1 ~ 4, are available. For
save/recall details, see page34.
Selects the output channel for level
adjustment. For level setting details,
see page23. Pressing and holding
CH2 key enab
les beep sound. For
details, see page21.
Activates Tracking Parallel operation
or Tracking Series operation, For
details, see page27.
Locks or unlocks the front panel
settings. For details, see page
42H22.
Turns the output on or off.
Te rm in al s
Default Terminals
GND Terminal
CH1 Output
CH1 CV/CC
Indicator
CH2 Output
European Terminals
Accepts a grounding wire.
Outputs CH1 voltage and current.
Indicates CH1 Constant Voltage or
Constant Current state.
Outputs CH2 voltage and current.
Vol t a g e K nobs
Adjusts the output voltage level for
CH1 or CH2. Pressing the knob
switches coarse and fine level setting.
Current Knobs
Adjusts the output current level for
CH1 or CH2. Pressing the knob
switches coarse and fine level setting.
Power Switch
Turns On
or Off the main power.
For power up sequence, see page
43H19.
15
CH2
CV/CC/PAR
Indicator
CH3 Output
CH3 Overload
Indicator
CH3 Voltage
Selector
16
Indicates CH2 Constant Voltage,
Constant Current, or Tracking
Parallel operation mode.
Outputs CH3 voltage and current.
Indicates when CH3 output current is
overloaded.
Selects CH3 output voltage: 2.5V,
3.3V, or 5V.
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