GW Instek PEL-2002 User manual

Programmable DC Electronic
Load
PEL-2000 Series
USER MANUAL
GW INSTEK PART NO. 82EL-20040MA1
ISO-9001 CERTIFIED MANUFACTURER

March 2010
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 the 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
right 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.

Table of Contents
3
Table of Contents
SAFETY INSTRUCTIONS ................................................... 5
GETTING STARTED......................................................... 10
Main Features ...................................... 12
Series Overview ................................... 13
Package Contents and Accessories....... 15
Measurement Overview ....................... 16
Front Panel Overview........................... 17
Display Overview – Mainframe ............ 22
Rear Panel Overview ............................ 25
Front Panel Overview – Load Module... 28
LED Display Overview – Load Module.. 32
Installation .......................................... 35
Load Connections ................................ 43
Frame Link Connection ........................ 54
Channel Control Connection ................ 56
Go/NoGo Connection .......................... 59
OPERATING DESCRIPTION............................................. 60
Operating Mode Description ............... 61
Run Program........................................ 71
Sequence ............................................. 74
Parallel Dynamic Loading .................... 78
Configurations Description .................. 79
Interface and File System..................... 89
TUTORIALS..................................................................... 96
Local loads .......................................... 97
Single Channel Load ............................ 99
Programming..................................... 101
Sequences.......................................... 103

PEL-2000 Series User Manual
4
Frame Link ......................................... 104
Channel Control................................. 106
General Configuration Options .......... 108
OPERATION...................................................................109
Local Mode Operation ....................... 112
Mainframe Basic Operation ............... 119
Channel Configuration ....................... 160
Mainframe Configuration ................... 180
Interface Configuration (settings) ...... 195
Save / Recall ...................................... 201
INTERFACE ....................................................................232
Interface Configuration ...................... 233
FAQ ...............................................................................241
APPENDIX .....................................................................242
Fuse Replacement .............................. 242
Battery Replacement .......................... 243
Firmware Update ............................... 244
Calibration ......................................... 245
Range Chart ....................................... 246
Default Settings ................................. 251
Specifications .................................... 253
Dimensions ....................................... 261
EC Declaration of Conformity............. 263
INDEX............................................................................264

SAFETY INSTRUCTIONS
5
SAFETY INSTRUCTIONS
This chapter contains important safety
instructions that you must follow when operating
the PEL-2002/PEL-2004, and when keeping it in
storage. Read the following before operating the
PEL-2002/2004 to ensure your safety and to keep
the PEL-2000 series in the best possible condition.
Safety Symbols
These safety symbols may appear in this manual or on the PEL-
2002/2004.
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 PEL-2002/2004 or
to other properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal

PEL-2000 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
Guideline
CAUTION
Do not place any heavy object on the PEL-
2002/2004.
Avoid severe impact or rough handling that
leads to damaging the PEL-2002/2004.
Do not discharge static electricity to the PEL-
2002/2004.
Do not block or obstruct the cooling fan vent
openings.
Do not perform measurement at circuits directly
connected to Mains (Note below).
Do not disassemble the PEL-2002/2004 unless
you are qualified as service personnel.
The equipment is not for measurements
performed for CAT II, III and IV.
(Measurement categories) EN 61010-1:2001 specifies the
measurement categories and their requirements as follows. The
PEL-2002/2004 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.

SAFETY INSTRUCTIONS
7
Power Supply
WARNING
AC Input voltage: 115V/230V switchable,
50/60Hz
The power supply voltage should not fluctuate
more than 15%.
Connect the protective grounding conductor of
the AC power cord to an earth ground, to avoid
electrical shock.
Fuse
WARNING
Fuse type: T3.15A/250V
Make sure the correct type of fuse is installed
before power up.
To avoid fire, only replace the fuse with the
specified type and rating.
Disconnect the power cord before fuse
replacement.
Make sure the cause of a fuse blowout is fixed
before replacing the fuse.
Battery
WARNING
Battery type: CR17345 (See page 243).
When replacing the battery ensure that the
correct make and model are used.
Cleaning the
PEL-2000
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 material such as benzene, toluene, xylene,
and acetone.

PEL-2000 Series User Manual
8
Operation
Environment
Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (Note below)
Temperature: 0°C to 40°C
Altitude: Up to 2000m
Transient Overvoltage on the main supply is
2500V.
(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees
and their requirements as follows. THE PEL-2002/2004 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: < 80%
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 PEL-2002/2004 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 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.

PEL-2000 Series User Manual
10
GETTING STARTED
This chapter describes the features and functions of the
PEL-2002/2004, including the front and rear panel
appearance, panel installation and connection types. Use
the Tutorial section for quick access to step by step
instructions on the main functions.
Main Features ................................................................. 12
Series Overview............................................................... 13
Package Contents and Accessories .................................. 15
Measurement Overview................................................... 16
Front Panel Overview ...................................................... 17
Display Overview – Mainframe ........................................ 22

GETTING STARTED
11
Rear Panel Overview........................................................ 25
Front Panel Overview – Load Module............................... 28
LED Display Overview – Load Module ............................. 32
Installation ..................................................................... 35
Load Module Installation ..................... 35
GPIB Installation ................................. 38
Rack Mount Installation....................... 39
Channel Number.................................. 40
Power Up & Self Test ........................... 41
Load Connections ........................................................... 43
Precautions and Procedures ................ 43
Remote (Sense) Connection................. 48
Single Load Connections...................... 50
Parallel Load Connections.................... 52
Frame Link Connection.................................................... 54
Channel Control Connection............................................ 56
Go/NoGo Connection ..................................................... 59

PEL-2000 Series User Manual
12
Main Features
Description The PEL-2002 and 2004 are multichannel
programmable DC electronic load mainframes.
The PEL-2002 mainframe is able to hold 2 load
modules, whilst the PEL-2004 is able to hold 4. The
flexible module configuration allows the
mainframes to either sink multiple loads
independently or large loads when used in
parallel.
The PEL-2000 series support three operation
modes: constant current (CC), constant voltage
(CV and CV+CC) and constant resistance (CR).
Constant current and constant resistance mode can
operate in either static or dynamic mode.
Feature Overview Flexible operation with removable load modules
Multiple independent isolated channels
High performance, up to 5 digit resolution
High slew rate enabling a high response speed
High capacity when frame linked
Different load module types can be used in the
same mainframe
Supports rack mount installation (PEL-2004)
Supports frame link connections, with up to 4
slave units
Color LCD display
120 different sets of programmable sequences
Accurate load simulation using Sequences
4 panel setups
USB flash drive support

GETTING STARTED
13
Interface USB
RS-232C
GPIB (optional)
Series Overview
The PEL-2000 series comprises of two different Mainframes: the PEL-
2002 and the PEL-2004. The Mainframes differ by the number of load
modules that can be accommodated. The PEL-2002 has two load
module slots whilst the PEL-2004 has 4. There are 4 different load
module models, the PEL-2020, PEL-2030, PEL-2040 and PEL-2041.
PEL-2040 PEL-2041PEL-2020 PEL-2030
PEL-2020
DC Elec tronic Load
L
R
20A / 80V , 100W
20A / 80V , 100W
PEL-2030
DC Ele ctroni c Load
5A / 80V , 30W
40A / 80V , 250W
L
R
PEL-2041
DC Elec tronic Load
10A / 500V , 350W PEL-2040
DC Electronic Load
70A / 80V , 350W
DC Electronic Load PEL-2004
LOCAL UTILITY
CAL.
F5F4F3F2
ON /
OFF
SHIFT PRESET
ENTER
F1
FILEFUNC
LOAD
9
CHAN
87
3
CLEAR
2
1
0
456
HELP
P0 LOCK
P3P1 P2
P6P4 P5
P9P7 P8
A/B
DYNA.
STATIC/
SHORT DISPLAY
LOAD
V sense
500V DC
MAX
MAX
500V DC80V DC
MAX
MAX
80V DC
V sense
LOAD
DISPLAY SHORT
STATIC/
DYNA.
A/B
R
80V DC
MAXMAX
80V DC
L
MAX
80V DC MAX 80V DC
R
V senseV sense
L
LOAD
DISPLAY SHORT
STATIC/
DYNA.
R/LR/L
DYNA.
STATIC/
SHORT DISPLAY
LOAD
L
V sense V sense
R
80V DC
MAX
80V DC
MAX
L
80V DC
MAX MAX
80V DC
R

PEL-2000 Series User Manual
14
PEL-2020 PEL-2040
DC Electronic Load PEL-2002
PEL-2040
DC Electronic Load
70A / 80V , 350W PEL-2020
DC Electronic Load
L
R
20A / 80V , 100W
20A / 80V , 100W
P8P7 P9
P5P4 P6
P2P1 P3
LOCKP0
HELP
654
0
12
CLEAR
3
78
CHAN
9
LOAD
FUNC FILE
F1
ENTER
PRESET SHIFT
OFF
ON /
F2 F3 F4 F5
CAL.
UTILITYLOCAL
80V DC
MAX
MAX
80V DC
Vsense
LOAD
DISPLAY SHORT
STATIC/
DYNA.
A/BR/L
DYNA.
STATI C/
SHORT DISPLAY
LOAD
L
Vsense Vsense
R
80V DC
MAX
80V DC
MAX
L
80V DC
MAX MAX
80V DC
R
The 4 different load module models each differ in the amount of current,
voltage and power and the amount of channels that the load module
can accommodate. The procedures in this manual will be load module
model independent unless specifically stated. Below is a table showing
the basic differences between each load module model. For detailed
specifications, please see page 253.
Load Module Channels Power (W)
CH L/R
Current (A)
Range
Low/High
Voltage (V)
PEL-2020 (100Wx2) 2 100/100 2/20 1-80
PEL-2030 (30/250W)
2 30/250 5/4/40 1-80
PEL-2040 1 350 7/70 1-80
PEL-2041 1 350 1/10 2.5-500

GETTING STARTED
15
Package Contents and Accessories
The PEL-2000 electronic load generator has a number of standard
and optional accessories that can be ordered. For more information
please visit the GW Instek website at www.gwinstek.com or
consult your authorized distributor for details.
Standard
Accessories
Description
Power Cable Mains power cable (region dependent)
User Manual PEL-2000 Series Electronic DC load User Manual
(region dependent)
GTL-120 Load cables 2X red, 2X black (per load module)
GTL-121 Remote sense cables , 1X red, 1X black (per load
module)
Options Description
PEL-2020
PEL-2030
PEL-2040
PEL-2041
Load Module
PEL-001 GPIB interface (Factory installed)
Optional
Accessories Description
PEL-002 PEL-2000 Rack Mount kit (handle only)
GTL-232 RS-232C
GTL-246 USB
GTL-248 GPIB cable
GTL-249 Frame link

PEL-2000 Series User Manual
16
Measurement Overview
The PEL-2000 series has a number of different operating modes that
are completely configurable. All the modes have customizable
Go/NoGo limits, range limits, timers, slew rates, alarms and
protection limits. To make tests, Programs and Sequences can be
created.
Function Description
Constant Current
Mode (CC)
In constant current mode, the PEL-2002/2004 will
sink a constant amount of current, regardless of
the voltage.
Constant Voltage
Mode (CV)
Under constant voltage mode, the voltage remains
unchanged, regardless of the current.
Constant
Resistance Mode
(CR)
In constant resistance mode, the resistance load
will remain unchanged as the voltage and current
remain proportional.
Programmable
Sequences
(Prog.)
The PEL 2000 series supports programming
sequences. With up to 120 different memory
settings in 12 programs with 10 sequences.
Sequences (Seq.) Used to create load profiles to accurately simulate
a load. Sequences can be created for each channel.

GETTING STARTED
17
Front Panel Overview
DC Electronic Load
PEL-2002
LOCAL
CAL.
F5F4F3F2
ON /
OFF
SHIFTPRESET
ENTER
F1
FILEFUNC
LOAD
9
CHAN
87
3
CLEAR
21
0
456
P0 LOCK
P3P1 P2
P6P4 P5
P9P7 P8
UTILITY
HELP
LCD display
Function keys
System Keys
Number Pad
Operation
keys
PowerUSB input
Selector
Knob
LCD display 320 by 240, TFT LCD display.
Function keys
Assigned to the menu functions on
the bottom of the display.

PEL-2000 Series User Manual
18
System Keys
CHAN/LOCAL is used to select
the load channel. Combined with
the shift key, Local is used to
activate/deactivate local control
(during remote control via the
interface or frame link
connections).
Brings up the
Channel Menu.
Used to activate
local control mode
during remote
control via the
interface
Used to access the Program or
Sequence menu.
Used to access the File menu.
Brings up the Help menu and
utility menu.
Provides help for
the last function
/key pressed.
Activates the
Utility Menu.

GETTING STARTED
19
Number pad
Enter numerical values, or to
save/recall presets (P0-P9).
Number values.
Preset numbers P0-
P9.
Decimal point and Calibration key
Decimal point.
Activate calibration
mode.
Note Please note, calibration mode is not supported.
Please see your distributor for calibration needs.
CLEAR
LOCK
Clears current values. Alternative
function locks the keys and the
Selector knob.
CLEAR
LOCK
Clears the current
value.
Locks all the keys
and Selector knob.
USB Input
USB flash memory slot.

PEL-2000 Series User Manual
20
Selector Knob
Used to select operations and to
increase/decrease values.
When turned left or
right moves the
cursor in menus or
changes the selected
item or value.
When pushed
down, acts as the
Enter key.
Operation Keys
Saves and recalls preset settings
and values.
When pressed in combination with
the number pad, Presets P0-P9 can
be recalled or saved.
Inactive
PRESET
Active. Used in
combination with
the number pad
and/or shift key.
Press to recall a
channel preset
Hold to save a
channel preset
Press to recall all
channel presets.
Hold to save all
channel presets.