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
Copyright Statement
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
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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
4
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.
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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.
6
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
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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.
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SAFETY INSTRUCTIONS
Storage
environment
Location: Indoor
Relative Humidity: < 70%
Temperature: -10°C to 70°C
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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.
10
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
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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.
12
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
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PPH-1503 User Manual
Interface
USB remote control.
GPIB remote control.
LAN remote control.
14
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
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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.
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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
or
5.0000 mA
OVERVIEW
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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
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OVERVIEW
Remote connectivity
Local mode:
RMT
Remote:
GPIB LAN
USB
Output
Switching the Output Source
Front:
FRONT
Rear:
REAR
Output State
On:
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.
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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：
20
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.
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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.
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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
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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.
24
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
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PPH-1503 User Manual
Diagram
Vmax
Imax
Constant
Voltage
Constant
Current
Vout
Iout
26
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
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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
3A
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
28
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)
20
2.5 18
4
16
6
14
10 12
16
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
ON
Turning the Output On/Off
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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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