GW Instek GPD-3303S, GPD-3303D Instruction Manual

DC Power Supply

GPD-3303 Series

USER MANUAL

GW INSTEK PART NO.

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.

ISO-9001 CERTIFIED MANUFACTURER

Good Will Instrument Co., Ltd.

No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan.

TABLE OF CONTENTS
Table of Contents
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 ........	32
SAVE/RECALL SETUP .....................................................	34
Save Setup ...........................................	34
Recall Setup .........................................	35
REMOTE CONTROL .......................................................	36
Remote Control Setup ..........................	36
Remote Connection Step......................	37
Command Syntax .................................	38
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GPD-3303 Series User Manual
Error Messages ....................................	38
Command List......................................	39
Command Details ................................	40
FAQ................................................................................	45
APPENDIX ......................................................................	46
Fuse Replacement ................................	46
Specifications ......................................	47
Declaration of Conformity ....................	49
INDEX ............................................................................	50

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SAFETY INSTRUCTIONS

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: Identifies conditions or practices that WARNING could result in injury or loss of life.

Caution: Identifies conditions or practices that CAUTION could result in damage to the GPD-3303 series or

to other properties.

DANGER High Voltage

Attention Refer to the Manual

Protective Conductor Terminal

Earth (ground) Terminal

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GPD-3303 Series User Manual

Safety Guidelines

General

Guidelines

CAUTION

•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 GPD3303 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.

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.

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.
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SAFETY INSTRUCTIONS

•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-3303 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	•	Location: Indoor, no direct sunlight, dust free,
Environment		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, nonconductive 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.

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			GPD-3303 Series User Manual
Storage		•	Location: Indoor
environment		•	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 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 0.75mm2 should 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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OVERVIEW

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 power up and set operation environment.

Introduction

Overview	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.
Independent /	The three output modes of GPD-3303 series,
Tracking Series /	independent, tracking series, and tracking parallel,
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.
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GPD-3303 Series User Manual

Constant Voltage/ Except for CH3, each output channel is completely Constant Current 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.

Automatic	The front panel display (CH1, CH2) shows the
tracking mode	output voltage or current. When operating in the
	tracking mode, the power supply will
	automatically connect to the autotracking mode.
Dynamic load	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.

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OVERVIEW

Series Lineup / Main Features

Series Lineup

Model	V Meter	A Meter	USB	Tracking Error
GPD-3303D	3 digit	3 digit	Yes	≤ 0.5% + 50mV of Master
GPD-3303S	5 digit	4 digit	Yes	≤ 0.5% + 10mV of Master

Main Features

Performance	•	Low noise: Cooling fan controlled by Heatsink
		temperature
	• Compact size, light weight
Operation	•	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
Protection	•	Overload protection
	•	Reverse polarity protection
Interface	•	USB for remote control

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GPD-3303 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
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 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.
Overload		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.

GPD-3303 Series User Manual

Front Panel Overview

Display

VoltMeter Displays CH1 or CH2 output voltage.

GPD-3303S (5 digits)

GPD-3303D (3 digits)

AmpMeter Displays CH1 or CH2 output current.

GPD-3303S (4 digits)

GPD-3303D (3 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 page34.
CH1/CH2/Beep	Selects the output channel for level
Keys	adjustment. For level setting details,
	see page23. Pressing and holding
	CH2 key enables beep sound. For
	details, see page21.
Parallel/Series	Activates Tracking Parallel operation
Keys	or Tracking Series operation, For
	details, see page27.
Lock Key	Locks or unlocks the front panel
	settings. For details, see page22.
Output Key	Turns the output on or off.
Voltage Knobs	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 page19.
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GPD-3303 Series User Manual

Terminals

Default Terminals

European Terminals

GND Terminal			Accepts a grounding wire.

CH1 Output				Outputs CH1 voltage and current.

CH1 CV/CC	Indicates CH1 Constant Voltage or
Indicator	Constant Current state.
CH2 Output	Outputs CH2 voltage and current.

CH2	Indicates CH2 Constant Voltage,
CV/CC/PAR	Constant Current, or Tracking
Indicator	Parallel operation mode.
CH3 Output	Outputs CH3 voltage and current.

CH3 Overload	Indicates when CH3 output current is
Indicator	overloaded.
CH3 Voltage	Selects CH3 output voltage: 2.5V,
Selector	3.3V, or 5V.
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