GW Instek GPE-1326 Series User manual

Multi-output DC Power Supply
GPE-1326/2323/3323/4323 Series
USER MANUAL
GW INSTEK PART NO. 82GP343230E01
ISO-9001 CERTIFIED MANUFACTURER
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

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

TABLE OF CONTENTS
3
Table of Contents
SAFETY INSTRUCTIONS .................................................. 5
OVERVIEW .................................................................... 10
Introduction......................................... 10
Series Lineup / Main Features ............. 12
Principle of Operation ......................... 13
Front Panel Overview ........................... 15
Rear Panel Overview ............................ 23
CV/CC Crossover Characteristics ......... 24
SETUP ........................................................................... 25
Power Up ............................................. 25
Load Cable Connection ........................ 26
Output On/Off..................................... 27
Select CH1/CH2 series or parallel
mode .................................................. 27
Switch between Channels..................... 28
Setting Voltage Lock from Front Panel . 29
Set the output state at startup ............. 29
Set the displayed digit resolution for the
voltage/current .................................... 30
Remote Control Setting........................ 31
OPERATION .................................................................. 32
CH1/CH2 Independent Mode .............. 32
CH3 Independent Mode ....................... 34
CH4 Independent Mode ....................... 36
CH1/CH2 Series Tracking Mode........... 38
CH1/CH2 Parallel Tracking Mode ........ 42
FAQ............................................................................... 44

GPE-1326/2323/3323/4323 Series User Manual
4
APPENDIX ......................................................................45
Fuse Replacement ................................ 45
Specifications ...................................... 46
Declaration of Conformity .................... 48
INDEX ............................................................................49

GPE-1326/2323/3323/4323 Series User Manual
6
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 device.
Avoid severe impacts or rough handling that
leads to damaging the device.
Do not discharge static electricity to the device.
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 device unless you are
qualified as service personnel.
(Measurement categories) EN 61010-1:2010 specifies the
measurement categories and their requirements as follows. The
GPE-1326/2323/3323/4323 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±10%, 230VAC +10%/-6%,
50/60Hz
Connect the protective grounding conductor of
the AC power cord to an earth ground, to avoid
electrical shock.

SAFETY INSTRUCTIONS
7
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
device
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

GPE-1326/2323/3323/4323 Series User Manual
8
(Pollution Degree) EN 61010-1:2010 specifies the pollution degrees
and their requirements as follows. The GPE-1326/2323/3323/4323
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.

SAFETY INSTRUCTIONS
9
Power cord for the United Kingdom
When using the GPE-1326/2323/3323/4323 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.

GPE-1326/2323/3323/4323 Series User Manual
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OVERVIEW
This chapter describes the GPE-1326/ 2323/ 3323/
4323 series in a nutshell, including its main
features and front/ rear panel introduction. After
going through the overview, follow the Setup
chapter (page 25) to properly power up and set
operation environment.
Introduction
Overview
The GPE-1326/2323/3323/4323 series regulated
DC power supply series are light weight,
adjustable, multifunctional work stations. The
GPE-1326 has a single independent adjustable
voltage output (Coarse and fine). The remote
voltage compensation function is activated for
large changes in current output. The GPE-2323 has
a 2 independent adjustable voltage outputs. The
GPE-3323 has three independent outputs: two with
adjustable voltage levels and one with fixed level
5V. The GPE-4323 has four independent voltage
outputs that are all fully adjustable. The 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.

OVERVIEW
11
Independent /
Series Tracking /
Parallel Tracking
The three output modes of GPE-2323/3323/4323
series, independent, series tracking and parallel
tracking 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. In the
tracking modes, both the CH1 and CH2 outputs
are automatically connected in series or parallel.
CH1 is master and CH2 is slave; no need to
connect output leads. In the series mode, the
output voltage is doubled; in the parallel mode,
the output current is doubled. The isolation
degree, from output terminal to chassis or from
output terminal to output terminal, is 500V
Constant Voltage/
Constant Current
Each output channel 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 page 24.

GPE-1326/2323/3323/4323 Series User Manual
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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.
For more details about CH1/CH2 Series Tracking
Mode, see page 38
Series Lineup / Main Features
Main Features
Performance
Low noise: Temperature controlled cooling fan
Compact size, light weight
Operation
Constant Voltage / Constant Current operation
Series Tracking / Parallel Tracking operation
Output On/Off control
Multi-output:
GPE-1326: 32V/6A x1;
GPE-2323: 32V/3A x2;
GPE-3323: 32V/3A x2, 5V/5A x 1
GPE-4323: 32V/3A x2, 5V/1A x1, 15V/1A x1
Coarse and fine Voltage/Current control(GPE-1326)
Output voltage compensation control (GPE-1326)
Function for locking the setting voltage
(CH1/CH2)
Output voltage/ current setting view
Set the displayed digit resolution for the voltage
& current output.
Protection
Overload protection
Reverse polarity protection
Inadvertent voltage setting protection
Interface
Remote control (Output ON/OFF)

OVERVIEW
13
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 CH1 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
Voltage
Amplifier
Voltage
Comparator
Series
Regulator
Instant Over
Load
Protection
Current
Comparator
Reference
Voltage
Source
Auxiliary
Rectifier &
Filter
“OR” Gate Amplifier
Relay
Control
Main
Rectifier &
Filter
AC Input
Transformer
O/P

GPE-1326/2323/3323/4323 Series User Manual
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Auxiliary Rectifier
The auxiliary rectifiers D120~ D123 provide bias
voltage filtered by the capacitors C120 and C121,
for the pre-regulators U150 and U151. 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
U151 is a comparator amplifier which compares
the reference voltage to the feedback voltage, and
then delivers it to Q151, which then calibrates the
output voltage.
Overvoltage
U131 is a comparator which activates when the
unit is overloaded and it controls the output of
U132 to turn off the output and inform the user.

GPE-1326/2323/3323/4323 Series User Manual
18
Output status of
CH3 in the GPE-
3323
When the output current is over
range, the overloaded indicator
Overload will be lit on the LCD
display.