GW Instek PPH-1503 User Manual

Programmable High Precision DC Power Supply

PPH-1503

User Manual

GW INSTEK PART NO. 82PH-15030E01

ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by copyright. 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

Table of Contents

SAFETY INSTRUCTIONS ................................................... 5

OVERVIEW ...................................................................... 11

Introduction ................................................... 11

Key Features ................................................... 13

Operating Principals ....................................... 15

Front Panel ..................................................... 17

Rear Panel ...................................................... 23

Constant Voltage/Constant Current Crossover

Characteristics................................................ 25

GETTING STARTED ......................................................... 27

Start Up .......................................................... 27

DVM and Load Connection ............................. 28

Turning the Output On/Off............................. 29

BASIC OPERATION ......................................................... 31

Basic Power Supply Functions ........................ 31

DVM ............................................................... 41

Pulse Current Measurement ........................... 43

Long integration ............................................. 49

Current Sink Function ..................................... 54

External Relay Control .................................... 56

Save/Recall ..................................................................... 59

Save Settings .................................................. 59

Recall Settings ................................................ 60

Restore Factory Default Settings ..................... 63

PPH-1503 User Manual

System Settings .............................................................. 64

System Information ........................................ 64

Utilty Settings ................................................. 65

REMOTE CONTROL ........................................................ 67

Remote Control .............................................. 67

Command Syntax ............................................ 76

Command List ................................................ 80

Command Details ........................................... 85

SCPI Status Registers SCPI ........................... 121

Errors ........................................................... 129

APPENDIX ..................................................................... 133

Replacing the Fuse ....................................... 133

Specifications ............................................... 134

Optional Accessories .................................... 136

Declaration of Conformity ............................ 137

SAFETY INSTRUCTIONS

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 PSW or to other properties.

DANGER High Voltage

Attention Refer to the Manual

Protective Conductor Terminal

Earth (ground) Terminal

SAFETY INSTRUCTIONS

This chapter contains important safety instructions that you must follow during operation and storage. Read the following before any operation to insure your safety and to keep the instrument in the best possible condition.

Safety Symbols

These symbols may appear in the manual or on the instrument.

PPH-1503 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 INSTRUCTIONS

General Guideline

CAUTION

 Do not place any heavy object on the unit.  Avoid severe impact or rough handling that

leads to damaging the unit.

 Do not discharge static electricity to the unit.  Do not block the cooling fan opening.  Do not perform measurements on circuits that

are directly connected to mains power.

 Do not disassemble the PSW unless you are

qualified.

(Measurement categories) EN 61010-1:2001 specifies the measurement categories and their requirements as follows. The PPH-1503 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 range: 90VAC~264VAC  Frequency: 50Hz/60Hz  To avoid electrical shock connect the protective

grounding conductor of the AC power cord to an earth ground.

Safety Guidelines

PPH-1503 User Manual

Fuse

WARNING

 Fuse type: T2.0A/250V  To prevent fire, replace the fuse only with the

specified type and rating.

 Disconnect the power cord before replacing the

fuse.

 Make sure the cause of fuse blowout is fixed

before replacing the fuse.

Cleaning the power supply

 Disconnect the power cord before cleaning the

oscilloscope.

 Use a soft cloth dampened in a solution of mild

detergent and water. Do not spray any liquid into the oscilloscope.

 Do not use chemicals 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

(Pollution Degree) EN 61010-1:2001 specifies pollution degrees and their requirements as follows. The PPH-1503 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.

SAFETY INSTRUCTIONS

Storage environment

 Location: Indoor  Relative Humidity: < 70%  Temperature: -10°C to 70°C

PPH-1503 User Manual

Green/ Yellow:

Earth

Blue:

Neutral

Brown:

Live (Phase)

Power cord for the United Kingdom

When using the power supply 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:

As the colours of the wires in main leads may not correspond with the coloured 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 either the letter E, the earth symbol or coloured

Green/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, a 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 exposed wiring from a cable, plug or connection that is engaged in a live socket is extremely hazardous. If a cable or plug is deemed hazardous, turn off the mains power and remove the cable, any fuses and fuse assemblies. All hazardous wiring must be immediately destroyed and replaced in accordance to the above standard.

OVERVIEW

Overview

The PPH-1503 is a portable high-speed programmable DC power supply with flexible operating configurations. In addition to the basic power supply functionality, it is also able to measure pulse current and the average current over long periods of time.

The PPH-1503 is designed for testing the power consumption of battery powered wireless communication devices (e.g. cell phones). Such devices often have large load variations within a short time span. The high precision power supply has excellent voltage stability during pulsed loads and is capable of simultaneously measuring the pulse current, even for very short pulses. In addition, the power supply is able to sink current, allowing it to simulate the characterics of a discharged rechargeable battery for testing chargers and charge control circuits.

OVERVIEW

This chapter contains a brief introduction to PPH-1503, the main features, as well as an overview of the front and rear panel. Use the Getting Started chapter on page 27 to for start up instructions and how to setup the appropriate operation environment.

Introduction

PPH-1503 User Manual

Basic Power Supply Function

The PPH-1503 works as a conventional power supply with automatic CC/CV crossover. Parameters such as the output voltage, current, read back refresh rate, data sampling period, power-on status, OVP and current range can be configured using the control panel. The voltage and current settings and the actual voltage/current are displayed on the LCD. For details, see page 31.

Pulse Current Measurement Function

The PPH-1503 can measure the change in instantaneous current and the current of extremely short pulses. The readback refresh rate, data sampling period, trigger delay and trigger level can be set by the front panel keys and is displayed on the LCD. For details see page 43.

Current Measurement over Long Periods

This function can measure the average current of one or more pulses. The readback refresh rate, trigger mode, and trigger timeout and trigger level settings are controled by the front panel keys and is displayed on the LCD display. For details, see page 49.

Current Sink Features

When the voltage of an external power source is greater than the high-speed power supply output, the system will automatically work as an electronic load to sink current. For details, see page 54.

Digital Volt Meter

The PPH-1503 has a DVM function that can measure DC voltages in the range of 0~20VDC. For details, see page 41.

Remote Control

To meet the various needs of customers, the PPH1503 is designed for USB, GPIB and LAN remote control. For details, see page 67.

OVERVIEW

Additional Features

The PPH-1503 has external relay control signals for customers. The relay control signals are synced to the pulse current measurement feature. For details, see page 56.

Features

 Low noise: Thermostatically controled fan.  Compact, lightweight.  3.5 inch TFT display.

Operation

 Constant voltage and constant current operation

(CV/CC).

 Output on/off control.  Front and Rear output control key.  Digital panel control.  5 groups of save/recall settings and 10

automatically generated power-on settings.

 Digital voltage and current settings.  Software calibration.  Alarm buzzer.  Key lock function.

Protection Features

 Reverse polarity protection.  Overvoltage and overcurrent protection

(OVP/Trip).

 Overtemperature protection (OTP).

Key Features

PPH-1503 User Manual

Interface

 USB remote control.  GPIB remote control.  LAN remote control.

OVERVIEW

Overview

The PPH-1503 mainly consists of the follow components:

 AC to DC Switching power supply  DC to DC Buck converter circuit  Precision output control circuit

The block diagram below shows a function description of each of the circuits. The following page will show detailed decriptions of each component.

Block Diagram

AC INPUT

AC TO DC

SWITCH POWER

DC TO DC BUCK CIRCUIT U201,Q201,Q202

L202

LINEAR

CONTROL

Q306~Q308,U303

ON/OFF SWITCH

Q309,Q310, Q315,Q316

AUXILIARY

POWER SUPPLY

U101,T101, Q102~Q105

V-SET

I-SET

AND

VOLTAGE

COMPARATOR

U301A

VOLTAGE

SAMPLING

CIRCUIT

U401,U402

CURRENT

COMPARATOR

U301B

CURRENT SAMPLING

CIRCUIT

U430

SAMPLE

RESISTANCE

R366,R366A R367,R367A

OUTPUT

Swtiching Power Supply

AC power is converted to 24VDC by the switch mode power supply module.

DC Down Conversion

To reduce the input voltage to 24VDC (slightly higher than the settable voltage) the U201 Buck IC is used in conjunction with two power MOSFETS (Q201/Q202) and an inductor (L202).

Operating Principals

PPH-1503 User Manual

Linear Output Circuit (Linear Regulator)

The Q306, Q307 dividers reduce the heat on a single component. The U303, U301, U403, U401 and U402 components form a control circuit to achieve accurate output.

Auxillary Power Supply

The independent auxillary DC power supply is achieved with the U101, T101 and Q102~Q105 components.

Front Panel

 

























 



PPH-1503

LCD display

Numberpad and

secondary function keys

Arrow keys

DVM inputs

Front panel output

terminals

Function keys

Power button

Display

Voltmeter Indicators

Displays the output voltage with up to 5 digits of resolution. The default units are Volts (V).

15.000 v

Ammeter Indicator

Displays the output current with up to 5 digits of resolution, depending on the current range (5A/5mA). The current range is selectable between A and mA.

5.0000 A

5.0000 mA

OVERVIEW

PPH-1503 User Manual

Setting Display

Displays the voltage and current settings.

V-Set

15.000 V

I-Set

5.0000 A

Parameter Settings Display

Displays the parameter settings. For details on setting parameters, see page 20. The following figure shows the F1 parameter settings (V AND I), for example.

Status Display

Display the current status of the instrument.

Status

Output mode

CV mode:

C V

CC mode:

C C

Overvoltage protection

Enabled:

O.V.P

Disabled:

O.V.P

Alarm

Enabled:

BEEP

Disabled:

BEEP

Key lock

Locked:

LOCK

Unlocked:

LOCK

CurrRange: 5 A LimMode: Limit

PowOnSetup: RST OutputRelay: One

O.V.P: Off RecallSetup: ---

IntRate: 1.00 PLC AverRead[1][2]: 1

OVERVIEW

Remote connectivity

Local mode:

RMT

Remote:

GPIB LAN

USB

Output

Switching the Output Source

Front:

FRONT

Rear:

REAR

Output State

On:

Off:

OFF

Function Display

Displays the unit functions. There four functions:

F1: Basic power supply function (V AND I); F2: Digital Voltmeter function (DVM); F3: Pulse current meter function (PULSE); F4: Long integration current measurement function

The basic power supply function is shown below. (The active function is shown in yellow.)

Function Keys

Menu key

Menu key to enter or exit from system settings.

Voltage Setting key

Press the Voltage key to set the voltage settings. See page 34 for operation details.

PPH-1503 User Manual

Current Setting key

Press the Current key to set the current settings. See page 35 for operation details.

Front and Rear output toggle key



Front and rear output toggle switch. The key will be lit when the output is set to the rear outputs.

Rear panel output:



Output key

The Output key turns the output on or off. The Output key will lightup when the output is on.

On:

LOCK key



The Lock key is used to disable all the panel keys except for the Output key. Pressing the Lock key for at least 2 seconds will turn the panel lock on or off. The Lock key can also be used to exit from remote control mode. When the panel lock is active the Lock key will light up.

Locked：



OVERVIEW

Numberpad























a. The numberpad is used to enter various parameters and values. The Clear key can be used to clear set parameters.

b. F1/F2/F3/F4 function short cuts. Press any of the function short cuts when in the main menu to enter the corresponding function interface. F1: Basic power supply function F2: Digital voltmeter function F3: Pulse current meter function F4: Long integration current measurement function.

c. H/L/A Pulse current measurement shortcut keys. These short cut keys only work in the Pulse current measurement main menu.

H: High measurement mode L: Low measurement mode A: Average measurement mode

Directional keys and Enter key



The directional keys are used for parameter and menu selection as well for fine adjustment of the current/voltage settings.

The Enter key is used to confirm the selection of any settings or parameters and to exit after a setting is complete.

PPH-1503 User Manual

Power Button

Turns the power on or off. On: Off:

Terminals

Output Terminals (SOURCE)



Output source terminals.

Voltage Feedback Terminals (SENSE)



Sense terminals.

Voltmeter Terminals (DVM)



Digital voltmeter input terminals.

Rear Panel

AC power socket

and fuse

Rear panel outputs and

DVM inputs

External

control port

Lan port

USB port

GPIB port

Heat sink fan

Terminals

AC input socket and line fuse

The AC input: 90~264VAC, 50Hz/60Hz Fuse: 2A slow-blow type. See page

133 for details.

USB port

USB device port for remote control. See page 67 for details.

GPIB port

GPIB slave port for remote control. Abides to IEEE488.1 (SCPI) protocol. See page 69 for details.

LAN port

LAN port for remote control. See page 72 for details.

OVERVIEW

PPH-1503 User Manual

Output interface

A total of 8 ports: 2 positive output terminals, 2 negative output terminals, a Sense+ terminal, a Sense- terminal, a DVM- input terminal and a DVM+ input terminal. Refer to the printed label under the terminals for the specific order of the terminals.

Relay control interface

A total of 5 ports: A +5V input terminal, a ground terminal and 2 terminals for relay control. See page 56 for relay control details.

OVERVIEW

Background

The unit will switch automatically between constant voltage and constant current according to changes in the load.

CV mode

When the load current is less than the current setting, the unit operates in constant voltage mode, changing the current level according to the load but maintaining the set voltage level until the current reaches the set current level. The status indicator will show CV on the LCD when in CV mode.

Constant Current Mode

When the output current reaches the set current level, the unit switches operation to constant current mode. The status indicator will show CC on the LCD display. In CC mode, the current level is maintained and the voltage level is limited to less than the set voltage level to limit the output power from an overload. When the current drops below the set current level, the unit will revert back to CV mode.

Constant Voltage/Constant Current Crossover Characteristics

PPH-1503 User Manual

Diagram

Vmax

Imax

Constant

Voltage

Constant

Current

Vout

Iout

GETTING STARTED

Checking the AC Voltage

Before the power is turned on, confirm that the input power supply meets the following conditions: 90-264VAC, 50Hz/60Hz

Connecting the AC power cord

The fuse is a 2A slow-blow fuse. Confirm that the fuse is of the correct type and rating before connecting the power cord.

Turning the power on

Press the power button. The LCD will display the line frequency of the AC power supply.

Turning the power off

To turn the power off, press the power button again.

GETTING STARTED

This chapter describes the start up procedures and the preparation that is necessary before operating the power supply.

Start Up

PPH-1503 User Manual

Recommended Cables

Model

Specification

Usage GTL-117

10A

Front panel DVM input

GTL-204A

10A

Front panel Source terminal

GTL-203A

Front panel Sense terminal

Front panel wiring

Use the GTL-204A cables for the front panel source connections.



Use the GTL-203A cables for the sense connections.



Use the GTL-117 cables for the DVM connections.



Rear panel connections

Rotate the screws counter clockwise to loosen the ports.

Insert the wires into the appropriate terminal according to the labels printed under the terminals.

DVM and Load Connection

GETTING STARTED

Screw the terminals in a clockwise direction to tighten.

Note

For safety considerations, please keep in mind that the front panel and rear panel terminals are physically connected.

Wire Gauge

Load wires must have enough current capacityto minimize 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/cm2.

Wire Size(AWG)

Maximum Current (A)

2.5 18

10 12

Panel Operation

Press the Output key to turn the output on. The Output key will light-up when the output is on.

The status display on the LCD display will also turn on.

OFF

Turning the Output On/Off

PPH-1503 User Manual

When the output is turned on, pressing the Output key again will turn the output off. When the output is off, the Output key will no longer be illuminated and the status on the LCD display will revert back to the OFF status.

Automatic Output Shut Down

Any of the following actions will cause the output to be automatically shut down:

 If any of the setups are recalled.  OVP/OTP protection is tripped.  OCP protection is tripped.

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