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.
ISO-9001 CERTIFIED MANUFACTURER
DC Power Supply
GPD-3303 Series
USER MANUAL
GW INSTEK PART NO.
Error Messages ....................................27H38
Command List......................................28H39
GPD-3303 Series User Manual
Command Details ................................ 29H40
Fuse Replacement................................ 32H46
Specifications ......................................33H47
Declaration of Conformity.................... 34H49
FAQ................................................................................30H45
APPENDIX......................................................................31H46
INDEX ............................................................................35H50
4
3
TABLE OF CONTENTS
Table of Contents
Introduction........................................... 9
Series Lineup / Main Features ............. 11
Principle of Operation.......................... 12
Front Panel Overview........................... 14
Rear Panel Overview ............................ 17
CV/CC Crossover Characteristics ......... 18
SAFETY INSTRUCTIONS .................................................. 5
OVERVIEW....................................................................... 9
Power Up ............................................. 19
Load Cable Connection ........................ 20
Output On/Off..................................... 21
Beep On/Off ........................................ 21
Front Panel Lock ..................................22
SETUP ........................................................................... 19
CH1/CH2 Independent Mode .............. 23
CH3 Independent Mode....................... 25
CH1/CH2 Tracking Series Mode........... 27
CH1/CH2 Tracking Parallel Mode ........19H32
OPERATION .................................................................. 23
Save Setup ...........................................21H34
Recall Setup......................................... 22H35
SAVE/RECALL SETUP ..................................................... 20H34
Remote Control Setup.......................... 24H36
Remote Connection Step...................... 25H37
Command Syntax ................................. 26H38
REMOTE CONTROL....................................................... 23H36
source of low-voltage installation.
building installation.
circuits directly connected to the low voltage installation.
series.
GPD-3303 Series User Manual
• Do not place any heavy object on the GPD-3303
• Avoid severe impacts or rough handling that
leads to damaging the GPD-3303 series.
• Do not discharge static electricity to the GPD-
3303 series.
opening.
connected to Mains (see note below).
you are qualified as service personnel.
• Do not block or obstruct the cooling fan vent
• Do not perform measurement at circuits directly
• Do not disassemble the GPD-3303 series unless
(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
• Measurement category III is for measurement performed in the
• Measurement category II is for measurement performed on the
circuits not directly connected to Mains.
±10%, 50/60Hz
the AC power cord to an earth ground, to avoid
electrical shock.
• Measurement category I is for measurements performed on
• AC Input voltage: 100V/120V/220V/230V
• Connect the protective grounding conductor of
220V/230V: T3.15A/250V
before power up.
• Fuse type: 100V/120V: T6.3A/250V,
• Make sure the correct type of fuse is installed
Safety Guidelines
General
CAUTION
Guidelines
WARNING
Power Supply
WARNING
Fuse
6
5
SAFETY INSTRUCTIONS
This chapter contains important safety instructions
that you must follow when operating the GPD-
3303 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-
SAFETY INSTRUCTIONS
3303 series.
Safety Symbols
These safety symbols may appear in this manual or on the GPD-3303
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
WARNING
to other properties.
CAUTION
Attention Refer to the Manual
DANGER High Voltage
Protective Conductor Terminal
Earth (ground) Terminal
series.
or coloured Green or
should be protected by a 3A
2
• Location: Indoor
• Relative Humidity: < 70%
environment
• Temperature: −10°C to 70°C
Power cord for the United Kingdom
When using the GPD-3303 series in the United Kingdom, make sure
WARNING: THIS APPLIANCE MUST BE EARTHED
Green/ Yellow: Earth
Blue: Neutral
the power cord meets the following safety instructions.
NOTE: This lead/appliance must only be wired by competent persons
IMPORTANT: The wires in this lead are coloured in accordance with the
following code:
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
Green & Yellow.
The wire which is coloured Blue must be connected to the terminal which is
terminal marked with the letter E or by the earth symbol
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.
8
GPD-3303 Series User Manual
Storage
with the specified type and rating.
replacement.
• To ensure fire protection, replace the fuse only
SAFETY INSTRUCTIONS
• Disconnect the power cord before fuse
before fuse replacement.
• Make sure the cause of fuse blowout is fixed
7
pollution occurs. The pollution has no influence.
occurs. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
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
detergent and water. Do not spray any liquid.
harsh products such as benzene, toluene, xylene,
and acetone.
• Disconnect the power cord before cleaning.
• Use a soft cloth dampened in a solution of mild
• Do not use chemicals or cleaners containing
almost non-conductive pollution (note below)
• Location: Indoor, no direct sunlight, dust free,
• 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 degree 2: Normally only non-conductive pollution
• Pollution degree 3: Conductive pollution occurs, or dry, non-
nor humidity is controlled.
Cleaning the
GPD-3303 series
Operation
Environment
The front panel display (CH1, CH2) shows the
output voltage or current. When operating in the
tracking mode, the power supply will
tracking mode
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.
Dynamic load
10
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
GPD-3303 Series User Manual
Constant Voltage/
Constant Current
CV/CC mode operation, see page18.
utomatic
A
OVERVIEW
This chapter describes the GPD-3303 series in a
nutshell, including its main features and front /
rear panel introduction. After going through the
perly power up and set operation environment.
overview, follow the Setup chapter (page19) to
pro
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.
9
OVERVIEW
Introduction
Overview
Independent /
Trac ki ng S er ie s /
Tracking Parallel
pre-regulator and reference voltage source
rectifier and filter, series regulator, current
comparator, voltage comparator, reference
voltage amplifier, remote device and relay
control circuit
• AC input circuit
• Transformer
• Bias power supply including rectifier, filter,
GPD-3303 Series User Manual
The power supply consists of the following.
• Main regulator circuit including the main
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.
Principle of Operation
Overview
Block diagram
≤ 0.5% + 50mV of Master
≤ 0.5% + 10mV of Master
12
11
OVERVIEW
Series Lineup / Main Features
Series Lineup
Model V Meter A Meter USB Tracking Error
GPD-3303D 3 digit 3 digit Yes
temperature
• Low noise: Cooling fan controlled by Heatsink
GPD-3303S 5 digit 4 digit Yes
Main Features
Performance
• 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
• Coarse and fine Voltage/Current control
• Software calibration
• Buzzer output
• Key lock function
• Overload protection
• Reverse polarity protection
• USB for remote control
Operation
Protection
Interface
GPD-3303D (3 digits)
GPD-3303 Series User Manual
Front Panel Overview
Displays CH1 or CH2 output voltage.
Display
Vol tMeter
GPD-3303S (5 digits)
GPD-3303D (3 digits)
Displays CH1 or CH2 output current.
AmpMeter
GPD-3303S (4 digits)
14
The auxiliary rectifiers D1011~ D1014 provide bias
voltage filtered by the capacitors C102 and C103,
OVERVIEW
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
13
the capacitor C101, and then regulated via a series-
wound 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.
Rectifier
Main Rectifier
Current Limiter
Overload
European Terminals
Indicates CH1 Constant Voltage or
Accepts a grounding wire.
Outputs CH1 voltage and current.
Constant Current state.
Outputs CH2 voltage and current.
Indicates CH2 Constant Voltage,
Constant Current, or Tracking
Outputs CH3 voltage and current.
Parallel operation mode.
Indicates when CH3 output current is
overloaded.
Selects CH3 output voltage: 2.5V,
3.3V, or 5V.
GPD-3303 Series User Manual
Te rm in al s
Default Terminals
GND Terminal
CH1 Output
CH1 CV/CC
Indicator
42H22.
CH2 Output
CH2
CV/CC/PAR
Indicator
CH3 Overload
CH3 Output
Indicator
CH3 Voltage
43H19.
Selector
16
15
or Off the main power.
key enables beep sound. For
Activates Tracking Parallel operation
or Tracking Series operation, For
details, see page27.
Locks or unlocks the front panel
Saves or recalls panel settings. Four
settings, 1 ~ 4, are available. For
save/recall details, see page34.
see page23. Pressing and holding
CH2
details, see page21.
Selects the output channel for level
adjustment. For level setting details,
settings. For details, see page
Turns the output on or off.
Adjusts the output voltage level for
CH1 or CH2. Pressing the knob
switches coarse and fine level setting.
Adjusts the output current level for
CH1 or CH2. Pressing the knob
switches coarse and fine level setting.
Turns On
For power up sequence, see page
OVERVIEW
Control Panel
Memory Keys
CH2/Beep
Keys
CH1/
l/Series
Paralle
Keys
Lock Key
Output Key
Vol t a g e K nobs
Current Knobs
Power Switch
Iout
Imax
Current
Constant
Voltage
Constant
Vout
Diagram
Vmax
18
17
The GPD-3303 series automatically switches
between constant voltage mode (CV) and constant
current mode (CC), according to load condition.
When the current level is smaller than the output
setting, the GPD-3303 series operates in Constant
Voltage mode. The indicator on the front panel
turns green (C.V.) The Voltage level is kept at the
setting and the Current level fluctuates according
to the load condition until it reaches the output
current setting.
When the current level reaches the output setting,
the GPD-3303 series starts operating in Constant
Current mode. The indicator on the front panel
turns red (C.C.) The Current level is kept at the
setting but the Voltage level becomes lower than
the setting, in order to suppress the output power
level from overload. When the current level
becomes lower than the setting, the GPD-3303
GPD-3303 Series User Manual
CV/CC Crossover Characteristics
Background
Power Cord /
Fuse Socket
CV mode
CC mode
series goes back to the Constant Voltage mode.
OVERVIEW
Rear Panel Overview
Accepts a USB slave connector for
command-based remote control
(page36).
The power cord socket accepts the
USB Connector AC SelectorCooling Fan
USB Connector
er Cord /
Pow
Fuse Socket
AC mains: 115V/230V, 50/60Hz.
For power up details, see page19.
he fuse holder contains the AC
T
main fuse. For fuse replacement
details, see page46.
Selects AC voltage: 100V/ 120V/
220V/ 230V.
lector
AC Se
counterclockwise and loosen
GPD-3303 Series User Manual
1. Turn the terminal
the screw.
2. Insert the cable terminal.
and tighten the screw.
3. Turn the terminal clockwise
Insert the plug into the socket.
Insert the plug into the terminal.
.
2
When using load cables other than the attached,
make sure they have enough current capacity for
minimizing cable loss and load line impedance.
Voltage drop across a wire should not excess 0.5V.
The following list is the wire current rating at
450A/cm
18 4
14 10
Load Cable Connection
GTL-104
GTL-105
GTL-203, 204
Wire type
Wire size (AWG) Maximum current (A)
20 2.5
16 6
20
12 16
19
SETUP
This chapter describes how to properly power up
and configure the GPD-3303 series before
operation.
SETUP
Before powering up the power
supply, select the AC input
voltage from the rear panel.
Power Up
Select AC voltage
Connect the AC power cord to
Connect AC
the rear panel socket.
power cord
Press the Power switch to turn
on the power. The display shows
Power On
the initialization screen with the
model name, followed by the
last recalled settings.
Press the Power switch again to
Power Off
turn off the power.
Press the LOCK key to lock
the front panel key
operation. The key LED
turns on. To unlock, press the LOCK key for 2
seconds. The key LED also turns off.
The OUTPUT key is not
affected by the lock
GPD-3303 Series User Manual
operation.
Front Panel Lock
Panel operation
Note
22
21
• Output on/off
• Panel lock/unlock
level knob switching
• CH1/CH2 output
reaching minimum
(zero) level
• Voltage/current level
Pressing the Output key turns
SETUP
Output On/Off
on all CH 1/2/3 outputs. The key LED also turns on. Pressing the Output
Panel operation
• Power on
mode switching
• INDEP – SER – PARA
• Setup save/recall
independent / tracking series / tracking parallel
By default, the beep sound is
enabled. To turn off the beep,
press the CH2 key for 2 seconds.
A beep comes out and the beep setting will be
turned off. To enable the beep, press the CH2 key
again for 2 seconds.
The following operations beep when the beep
key again turns the output and the key LED off.
Any of the following actions during output on
Automatic output
off
automatically turns it off. They might involve
• Change the operation mode between
sudden and harmful change in the output level.
• Recalling other setups from the memory
• Storing the setup into the memory
Beep On/Off
Panel operation
setting is on.
List of beep
fine/coarse switching
• Voltage/current knob
(For CH1)
and current. Press the CH1
key (LED turns on) and then
use the Voltage and Current
Note: this diagram shows non-European terminals.
GPD-3303 Series User Manual
3. Set the CH1 output voltage
knob.
(Fine control)
By default, the Voltage and
Current knob work in the
coarse mode. To activate the
fine mode, press the knob to
turn the FINE LED on.
• Coarse: 0.1V or 0.1A @ rotation click
• Fine: the smallest digit @ rotation click
4. Repeat the above settings for the CH2.
5. To turn on the output, press
the output key. The key
LED turns on and the CH1 /
(CH1)
CH2 indicator shows the
(CH2)
output mode, CV or CC.
24
OPERATION
23
INDEP and SER/INDEP
keys are turned off (the key
LEDs are off).
CH1 and CH2 outputs work independent of each
other.
0 ~ 30V/0~3A for each channel
1. Make sure the PARA/
CH1 +/−, CH2 +/−.
2. Connect the load to the front panel terminals,
OPERATION
CH1/CH2 Independent Mode
Background /
Connection
Output rating
Panel operation
the output key. The key
LED turns on.
GPD-3303 Series User Manual
3. To turn on the output, press
When the output Current level
exceeds 3A, the overload
indicator turns red and CH3
operation mode switches from
Constant Voltage to Constant
Current.
Note: “overload” in this case does not mean an
abnormal operation.
CV → CC
26
25
CH3 Independent Mode
The CH3 rating is 2.5V/3.3V/5V, 3A fixed. It
Background /
OPERATION
works independently from CH1 and CH2,
Connection
panel CH3 +/− terminal.
(the diagram shows non-
European terminals)
regardless of their modes.
2.5V/3.3V/5V, 3A fixed
Output rating
CH3 does not have tracking series/parallel mode.
No Tracking
Also, CH3 output is not affected by CH1 and CH2
modes.
1. Connect the load to the front
Series/Parallel
Panel operation
2. Select the output voltage,
2.5V/3.3V/5V using the
CH3 voltage selector key.
(Fine control)
the output key. The key LED
turns on) and then use the
Current knob to set the CH2
output current to the
maximum level (3.0A).
By default, the Voltage and
Current knob work in the
coarse mode. To activate the
fine mode, press the knob to
CH1+ & CH2− (Single supply).
GPD-3303 Series User Manual
2. Connect the load to the front panel terminals,
Note: this diagram shows non-European terminals.
3. Press the CH2 key (LED
turn the FINE LED on.
• Coarse: 0.1V or 0.1A @ rotation click
• Fine: the smallest digit @ rotation click
turns on) and then use the
Voltage and Current knob
to set the output voltage
and current level.
4. Press the CH1 key (LED
turns on.
5. To turn on the output, press
for the output setting level and CV/CC status.
6. Refer to the CH1 (Master) meter and indicator
28
27
CH1/CH2 Tracking Series Mode
Tracking series operation doubles the Voltage
Background
OPERATION
capacity of the GPD-3303 series by internally
to activate the tracking
series mode. The key LED
turns on.
connecting CH1 (Master) and CH2 (Slave) in serial
and combining the output to a single channel. CH1
(Master) controls the combined Voltage output
level.
The following describes two type of configurations
depending on the common ground usage.
Tracking series without common terminal
Connection
0 ~ 60V/0 ~ 3A 1. Press the SER/INDEP key
Output rating
for both channels).
(Fine control)
By default, the Voltage and
Current knob work in the
coarse mode. To activate the
fine mode, press the knob to
turn the FINE LED on.
• Coarse: 0.1V or 0.1A @ rotation click
• Fine: the smallest digit @ rotation click
the master output current.
4. Use the Current knob to set
LED), press the output key.
5. To turn on the output (and
30
(master & slave)
Note: this diagram shows non-European terminals.
on) and use the Voltage knob
to set the master & slave
output voltage (the same level
3. Press the CH1 key (LED turns
2. Connect the load to the front panel terminals,
CH1+ & CH2−. Use the CH1 (−) terminal as the
common line connection.
activate the tracking series
GPD-3303 Series User Manual
mode. The key LED turns on.
1. Press the SER/INDEP key to
OPERATION
Double the reading on the CH1
Voltage meter. In the above
case, the actual output is 20.0 x 2
= 40.0V.
CH1 meter reading shows the
output Current. In the above
case, 2.000A. (CH2 Current
control must be in the
Maximum position=3.0A).
0~30V/0~3A for CH1 ~ COM
0~–30V/0~3A for CH2 ~ COM
29
Voltage level
Current level
Tracking series with common terminal
Connection
Output rating
Tracking parallel operation doubles the current
capacity of the GPD-3303 series by internally
connecting CH1 and CH2 in parallel and
combining the output to a single channel. CH1
GPD-3303 Series User Manual
controls the combined output.
0 ~ 30V/0 ~ 6A
1. Press the PARA/INDEP key
to activate the tracking
parallel mode. The key LED
turns on.
2. Connect the load to the CH1 +/− terminals.
Note: this diagram shows non-European terminals.
CH1/CH2 Tracking Parallel Mode
Background /
Connection
CH1 meter reading shows the
output voltage. In the above case,
20.0V.
CH1 meter reading shows the
output current. In the above case,
2.000A.
Output rating
The CH2 meter reading shows
the output voltage. In the above
case, 20.0V.
The CH2 meter reading shows
the output current. In the above
32
31
case, 3.000A.
OPERATION
status, refer to the CH1 meter and indicator.
6. For the master (CH1) output level and CV/CC
voltage level
Master (CH1)
current level
Master (CH1)
on) and use the Current knob
7. Press the CH2 key (LED turns
to set the slave output current.
status, refer to the CH1/CH2 meter and CH2
indicator.
8. For the slave (CH2) output level and CV/CC
voltage level
Slave (CH2)
current level
Slave (CH2)
mode
• Independent / tracking series / tracking parallel
• CH1/CH2 knob selection
• Fine/coarse editing mode
The front panel settings can be stored into one of
the four internal memories.
GPD-3303 Series User Manual
The following list shows the setup contents.
• Output voltage/current level
• Output on/off
• Front panel lock/unlock
Press one of the 1~4 Memory
keys for 2 seconds, for example
memory 1. The panel settings
are saved in memory 1 and the
key LED turns on. When the
panel settings are modified, the
LED turns off.
When a setting is stored, the output automatically
The following settings are always saved as “off”.
turns off.
SAVE/RECALL SETUP
Save Setup
Background
Contents
(Fine control)
Panel operation
The CH1 meter reading shows
the output voltage. In the above
case, 20.0V.
Note
Double the amount of CH1
current meter reading. In the
above case, 2.0A x 2 = 4.0A.
34
33
the output key. The key
LED turns on.
OPERATION
3. To turn on the output, press
red, indicating tracking
parallel (PARA) mode.
4. The CH2 indicator turns
turns on) and then use the
Voltage and Current knob
to set the output voltage
and current. The CH2
output control is disabled.
By default, the Voltage and
Current knob work in the
coarse mode. To activate the
fine mode, press the knob to
turn the FINE LED on.
5. Press the CH1 key (LED
6. For the output level and CV/CC status, refer to
the CH1 meter and indicator.
Voltage level
Current level
USB slave port, rear panel
• Baud rate: 9600
• Parity bit: None
• Data bit: 8
• Stop bit: 1
The GPD-3303D and GPD-3303S are capable of
GPD-3303 Series User Manual
being remotely controlled via the USB connection.
Set up the COM port inside the PC according to
the following list.
• Data flow control: None
Run this query command via the terminal
application such as MTTTY (Multi-threaded TTY).
*IDN?
This should return the identification information:
Manufacturer, model name, serial number,
firmware version.
GW INSTEK, GPD-3303x, SN: xxxxxxxx, Vx.xx
REMOTE CONTROL
Remote Control Setup
Background
Interface
COM setting
Functionality
check
36
35
Recall Setup
The front panel settings can be recalled from one of
Background
SAVE/RECALL SETUP
mode
the four internal memories.
• Independent / tracking series / tracking parallel
The following list shows the setup contents.
Contents
• CH1/CH2 knob selection
• Fine/coarse editing mode
• Output voltage/current level
• Output on/off
• Front panel lock/unlock
Press one of the 1~4 Memory
keys, for example memory 1.
The panel settings saved in
memory 1 are recalled. The key
LED turns on. When the panel
settings are modified, the LED
turns off.
When a setting is recalled, the output
The following settings are always recalled as “off”.
Panel operation
automatically turns off.
Note
0.1, 3.14, 8.5
1: command header
2: output channel
3: separator
4: parameter
boolean logic 0 (off), 1 (on)
integers 0, 1, 2, 3
decimal numbers
The command length must be 15 characters
or less.
Invalid characters, such as symbols, are
entered. Example: VOUT#
The parameter is missing from the command.
Example: VSET: (should have a number)
The entered value exceeds the specification.
Example: VSET:33 (should be ≤ 32V)
The entered command is not allowed in the
circumstance. Example: trying to set CH2
output while in the tracking mode.
The entered command does not exist, or the
syntax is wrong.
GPD-3303 Series User Manual
Command Syntax
Command format
1 (CH1) or 2 (CH2)
Output channel
Parameter Type Description Example
<Boolean>
<NR1>
Commands are not case-sensitive.
<NR2>
Note
Error Messages
The following error messages might appear when the GPS-3303D or
3303S cannot accept the command. Message contents Descriptions
Program mnemonic
too long
Invalid character
Missing parameter
Data out of range
Command not allowed
Undefined header
38
37
REMOTE CONTROL
Remote Connection Step
Entering the
1. Connect the USB cable to the slave port.
remote control
established, and the front panel shows
“USB…YES” message.
2. The connection will be automatically
mode
lock state (the Lock key will become activated).
3. The power supply also automatically enters the
1. Disconnect the USB cable from the rear.
Leaving the
2. The display shows “USB…NO” message.
remote control
mode
Lock key until it turns off.
3. Unlock the power supply by keep pressing the
operation mode.
4. The power supply goes back to the local
Sets the CH1 output current to
2.234A (for GPD-3303S)
Sets the CH1 output current to
2.23A (for GPD-3303D)
Sets the output current.
See page23
GPD-3303 Series User Manual
Minimum 70ms
ISET1:2.23
Returns the CH1 output current setting
Returns the output current setting.
See page23
Minimum 80ms
Sets the CH1 voltage to 20.345V
(for GPD-3303S)
Sets the CH1 voltage to 20.3V
(for GPD-3303D)
Sets the output voltage.
See page23
Minimum 70ms
VSET1:20.3
Command Details
ISET<X>:<NR2>
Description
Panel operation
Response time
Example ISET1:2.234
ISET<X>?
Description
Panel operation
Response time
Example ISET1?
VSET<X>:<NR2>
Description
Panel operation
Response time
Example VSET1:20.345
40
39
REMOTE CONTROL
Command List
• Detailed descriptions of each command start from the next page.
• The “HELP” command shows all the below commands and their
meanings, except for the HELP command itself.
Sets the output current.
Returns the output current setting.
Sets the output voltage.
ISET<X>:<NR2>
VSET<X>:<NR2>
ISET<X>?
Returns the output voltage setting.
VSET<X>?
Returns the actual output current.
Returns the actual output voltage.
IOUT<X>?
VOUT<X>?
Selects the operation mode.
TRACK<NR1>
Turn on or off the beep.
Turn on or off the output.
OUT<BOOLEAN>
BEEP<BOOLEAN>
Returns the GPS-3303D or GPS-3303S status.
STATUS?
Returns the GPS-3303D or GPD-3303S
identification.
*IDN?
Recalls a panel setting.
RCL<NR1>
Saves the panel setting.
SAV<NR1>
Shows the command list.
Returns the instrument error messages.
ERR?
HELP?
Turns on the beep
Turns on the output
10=Tracking parallel
Tracking 01=Independent, 11=Tracking series,
Turns the beep on or off.
See page21
GPD-3303 Series User Manual
BEEP<Boolean>
Description
Minimum 70ms
Panel operation
Response time
Example BEEP1
Turns on or off the output.
See page21
Minimum 70ms
OUT<Boolean>
Description
Panel operation
Response time
Example OUT1
STATUS?
Returns the GPD-3303D or GPD-3303S status.
Minimum 400ms
Description
Response time
Bit Item Description 0 CH1 0=CC mode, 1=CV mode 1 CH2 0=CC mode, 1=CV mode 2, 3
8 bits in the following format
Contents
4 Beep 0=Off, 1=On 5 N/A N/A
6 Output 0=Off, 1=On 7 N/A N/A
42
41
REMOTE CONTROL
Returns the output voltage setting.
VSET<X>?
Description
Minimum 80ms
Response time
Returns the CH1 voltage setting
Example VSET1?
IOUT<X>?
Returns the actual output current.
Minimum 80ms
Description
Response time
Returns the CH1 output current
Example IOUT1?
VOUT<X>?
Returns the actual output voltage.
Description
See page23
Panel operation
Minimum 80ms
Response time
Returns the CH1 output voltage
Example VOUT1?
TRACK<NR1>
Selects the operation mode: independent, tracking
Description
Selects the independent mode
series, or tracking parallel.
See page27
0: Independent
1: Tracking series
2: Tracking parallel
Minimum 70ms
Panel operation
NR1
Response time
Example TRACK0
Checks the error status of the instrument and
returns the last error message.
Minimum 70ms
GPD-3303 Series User Manual
See page38 for the list of error messages.
ISET<x>:<NR2> Sets the value of current.
VSET<x>:<NR2> Sets the value of voltage. x:1=CH1,2=CH2.
Contents
ISET<x>? Return the value of current.
VSET<x>? Return the value of voltage.
IOUT<x>? Returns actual output current，
VOUT<x>? Returns actual output voltage.
TRACK<NR1> Sets the output of the power supply working on
independent or tracking mode. NR1:0=INDEP,1=SER,2=PARA;
BEEP<Boolean> Sets the BEEP state on or off.
OUT<Boolean> Sets the output state on or off.
STATUS? Returns the power supply state.
bit0:(CH1)0=CC,1=CV;bit1:(CH2)0=CC,1=CV;bit23=(TRACK)01=INDEP,1
1=SER,10=PARA;bit4:(BEEP)0=OFF,1=ON;bit6:(OUT)0=OFF,1=ON;
*IDN? Returns instrument identification.
RCL<NR0> Recall the setting data from the memory which previous
saved.
SAV<NR0> Saves the setting data to memory.
NR0:1=Memory1,2=Memory2,3=Memory3,4=Memory4;
ERR? Returns instrument error messages.
Recalls the panel setting stored
in memory 1
ERR?
Description
Stores the panel setting in
memory 1
Response time
Contents
44
43
REMOTE CONTROL
Returns the GPD-3303D or GPD-3303S
*IDN?
Description
identification.
Minimum 300ms
GW INSTEK,GPD-3303x,SN: xxxxxxxx, Vx.xx
(Manufacturer, model name, serial number,
firmware version)
Response time
Contents
Recalls a panel setting.
See page35
RCL<NR1>
Description
Panel operation
1 – 4: Memory 1 to 4
NR1
Minimum 70ms
Response time
Example RCL1
Stores the panel setting.
See page34
SAV<NR1>
Description
Panel operation
1 – 4: Memory 1 to 4
NR1
Minimum 70ms
Response time
Example SAV1
HELP?
Shows the command list.
Minimum 1000ms
Description
Response time
socket using a minus driver.
GPD-3303 Series User Manual
1. Take off the power cord and remove the fuse
2. Replace the fuse in the holder.
• 100V/120V:T6.3A/250V
• 220V/230V:T3.15A/250V
APPENDIX
23BFuse Replacement
Steps
Rating
46
45
FAQ
FAQ
Q1. I pressed the panel lock key but the output still turns on/off. A1. The output key is not affected by the panel lock key operation,
for ensuring safety.
Q2. The CH3 overload indicator turned on – is this an error? A2. No, it simply means that the CH3 output current reached the
maximum 3.0A and the operation mode turned from CV (constant
voltage) to CC (constant current). You can continue using the power
supply, although reducing the output load is recommended.
Q3. The specifications does not match the real accuracies. A3. Make sure that the power supply is powered on for at least 30
minutes, within +20°C – +30°C.
Q4. The internal memory is not recording the panel setting correctly –
the output should be on. A4. The output is always stored or recalled as “off” to ensure safety.
/ marketing@goodwill.com.tw.
For more information, contact your local dealer or GWInstek at
www.gwinstek.com.tw
Current: 1mA
display
display
± (0.3% of reading + 10mA)
± (0.5% of reading + 2digits)
± (0.3% of reading + 10mA)
± (0.5% of reading + 2digits)
30MΩ or above (DC 500V)
20MΩ or above (DC 500V)
GPD-3303S Voltage: 1mV
GPD-3303 Series User Manual
GPD-3303S 3.2A full scale, 4 digits 0.4" LED
A Meter GPD-3303D 3.2A full scale, 3 digits 0.5" LED
GPD-3303D ± (0.5% of reading + 2digits)
GPD-3303S 32V full scale, 5 digits 0.4" LED display
V Meter GPD-3303D 32V full scale, 3 digits 0.5" LED display
Program
Accuracy
GPD-3303D ± (0.5% of reading + 2digits)
GPD-3303S ± (0.03% of reading + 10mV)
Readback
Accuracy
GPD-3303S ± (0.03% of reading + 10mV)
Insulation Chassis and
AC cord
Te rm in al
Indoor use, Altitude: ≤ 2000m
Ambient temperature 0 ~ 40°C
Chassis and
Operation
Environment
Ambient temperature –10 ~ 70°C
Relative humidity ≤ 80%
Relative humidity ≤ 70%
Installation category: II, Pollution degree: 2
Storage
Environment
Test lead GTL-104 x 2, GTL-105 x 1
(Europe) Test lead GTL-203 x 1, GTL-204 x 2
Power Source AC 100V/120V/220V/230V±10%, 50/60Hz
Accessories User manual x1
Dimensions 210 (W) x 130 (H) x 265 (D) mm
Weight Approx. 7kg
48BOptions
USB cable GTL-246 USB 2.0, A-B type
48
47
APPENDIX
24BSpecifications
The specifications apply when the GPD-3303 series are powered on
for at least 30 minutes under +20°C – +30°C. Output Ratings CH1/CH2
0 ~ 30V / 0 ~ 3A
Independent
0 ~ 30V / 0 ~ 6A
0 ~ 60V / 0 ~ 3A
CH1/CH2
Series
CH1/CH2
≤ 0.01% + 3mV
≤ 0.01% + 3mV (rating current ≤ 3A)
≤ 0.02% + 5mV (rating current > 3A)
Line
Parallel
Load
Ripple & Noise
Vol tage
Regulation
CH3 2.5V/3.3V/5.0V, 3A
≤ 1mVrms (5Hz ~ 1MHz)
≤ 100μs (50% load change, minimum
load 0.5A)
≤ 300ppm/°C
Temperature
Coefficient
Recovery Time
≤ 0.2% + 3mA
Line
Current
≤ 0.2% + 3mA
Line ≤ 5mV
Load ≤ 15mV
≤ 3mArms
Regulation
Load
Regulation
Ripple & Noise
CH3 Specification
≤ 0.5%+50mV of Master (GPD-3303D)
≤ 2mVrms
Ripple & Noise
Line: ≤ 0.01% + 3mV
Load: ≤ 0.01% + 3mV
Tracking Error ≤ 0.5%+10mV of Master (GPD-3303S)
Tr ac kin g
Regulation
Parallel
Operation
(rating current ≤ 3A)
Load: ≤ 0.02% + 5mV
(rating current > 3A)
Line: ≤ 0.01% + 5mV
Series
Load: ≤ 300mV
Current: 10mA
Regulation
GPD-3303D Voltage: 100mV
Meter Resolution
lock (manual).................... 22
overview ........................... 14
rating ................................. 46
replacing ........................... 46
safety instruction ............... 6
block diagram................... 12
dynamic load.................... 10
lineup................................. 11
list of features ................... 11
operation theory............... 12
fuse
GPD-3303 Series User Manual
GPD series
technology overview......... 9
ground symbol....................... 5
identification information... 43
load connection.................... 20
independent...................... 23
remote control .................. 41
specifications .................... 47
tracking parallel ............... 32
tracking series................... 27
manual............................... 24
remote control .................. 40
FAQ ................................... 45
manual............................... 21
remote................................ 42
manual............................... 24
operation mode
output current setting
output on/off
remote control .................. 40
output voltage setting
contents..............................21
manual ...............................21
INDEX
automatic out off ..................21
banana plug...........................20
beep setting
remote control...................42
caution symbol .......................5
............................................36
recalling the list.................43
series...................................27
safety instruction ................6
CH1/CH2 indicator .........24
CH3 indicator....................26
operation theory .........10, 18
declaration of conformity 49
measurement category ......6
cleaning the instrument.........7
COM setting, remote control
command list ........................39
common terminal, tracking
cooling fan.............................17
CV/CC
Electrostatic Discharge
EN 61000-4-2: 1995 + A1:1998 +
A2:2001
Radiated Immunity
EN 61000-4-3: 2002 + A1:2002
Electrical Fast Transients
EN 61000-4-4: 2004
EN61010
Surge Immunity
EN 61000-4-5: 1995 + A1:2001
pollution degree .................7
EN 61000-4-6: 1996 + A1:2001
EN 61000-4-8: 1993 + A1:2001
EN61326-1 .............................49
operation..............................7
specification ......................48
storage..................................8
environment
EN 61000-4-11: 2004
control..........................38, 44
error messages, remote
50
front panel
49
APPENDIX
25BDeclaration of Conformity
We
GOOD WILL INSTRUMENT CO., LTD.
(1) No.7-1, Jhongsing Rd., Tucheng City, Taipei County, Taiwan
(2) No. 69, Lu San Road, Suzhou City (Xin Qu), Jiangsu Sheng, China
declare, that the below mentioned product
Type of Product: Power Supply
Model Number: GPD-3303D/GPD-3303S
are herewith confirmed to comply with the requirements set out in the
Council Directive on the Approximation of the Law of Member States
relating to Electromagnetic Compatibility (2004/108/EC, 89/336/EEC,
92/31/EEC, 93/68/EEC) and Low Voltage Directive (73/23/EEC,
ClassA
EN 61326-1: 2006 Electrical equipment for measurement, control and
laboratory use –– EMC requirements
Conducted Emission
Radiated Emission
EN 55011: 1998 + A1:1999 +
A2:2002
Current Harmonics
EN 61000-3-2: 2000 + A2:2005
Voltage Fluctuations
EN 61000-3-3: 1995 + A1:2001
------------------------- Conducted Susceptibility
------------------------- Power Frequency Magnetic Field
93/68/EEC).
For the evaluation regarding the Electromagnetic Compatibility and
Low Voltage Directive, the following standards were applied:
◎ EMC
------------------------- Voltage Dip/ Interruption
Low Voltage Equipment Directive 73/23/EEC, 93/68/EEC
Safety Requirements
◎ Safety
IEC/EN 61010-1: 2001
interface............................. 36
manual............................... 34
remote................................ 43
save settings
INDEX
safety instruction ................6
overload indicator ................26
setup...................................19
power supply
service operation
socket overview ................17
about disassembly ............. 6
specification.......................48
contact ............................... 45
protective ground symbol.....5
status, instrument ................ 42
rear panel overview .............17
51
operation theory................. 9
tracking mode
UK power cord....................... 8
USB interface ........................36
warning symbol ..................... 5
wire, load ..............................20
manual ...............................35
remote ................................43
command syntax ..............38
connection test ..................36
recall settings
remote control
error messages ..................38
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