Instek PEL-5006C-150-600, PEL-5008C-1200-320, PEL-5024C-600-1680, PEL-5008-150-800, PEL-5010C-150-1000 User Manual

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High Power Electronic Load

PEL-5000C Series

USER MANUAL

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

SAFETY INSTRUCTIONS .................................................. 4

GETTING STARTED .......................................................... 8

PEL-5000C Series Introduction .............................. 10

Accessories............................................................ 13

Operating Mode Description ................................. 14

Operating Area ...................................................... 20

Appearance ............................................................ 27

FUNCTION DESCRIPTION ............................................. 38

Function keys description ...................................... 39

Test keys description ............................................. 53

System keys description ........................................ 68

Test keys description ............................................. 77

CONNECTION ............................................................... 79

Rear Panel ............................................................. 80

Connecting the I-monitor to an oscilloscope ......... 84

Master/Slave Instructions ..................................... 85

INSTALLATION .............................................................. 88

Check line voltage .................................................. 89

Grounding requirements ....................................... 89

Power up ............................................................... 90

Connection to the load Input Terminal .................. 90

GPIB & RS232 interface option .............................. 91

RS232 interface option .......................................... 92

GPIB interface option ............................................ 92

USB interface option ............................................. 92

LAN interface option ............................................. 93

I/O connection ...................................................... 93

PEL-5000C User Manual

Load current slew rate setting ............................... 94

Load wire inductance ............................................ 96

REMOTE CONTROL ...................................................... 100

Interface Configuration ........................................ 101

Communication Interface programming command

list ....................................................................... 103

Command Syntax ................................................. 115

Command List ..................................................... 117

PRESET Commands ............................................. 119

Limit Commands ................................................. 132

STAGE commands ............................................... 135

System Commands .............................................. 141

Measure Commands ............................................ 143

APPLICATION ............................................................... 144

Local sense connections ...................................... 145

Remote sense connections .................................. 146

Constant Current mode application ..................... 148

Constant Voltage mode application ..................... 151

Constant Resistance mode application ................ 153

Constant Power mode application ....................... 155

CC + CV mode of operation application ............... 157

CP + CV mode of operation application ............... 159

Constant current source operating ....................... 161

Zero-Volt loading application ............................... 162

Parallel operation ................................................ 163

Power Supply OCP testing ................................... 164

Power Supply OPP testing ................................... 166

SHORT testing ..................................................... 168

Battery discharge test .......................................... 171

APPENDIX .................................................................... 175

PEL-5000C Default Settings ................................. 176

PEL-5000C Dimensions ........................................ 183

Table of Contents

PEL-5000C series Specifications .......................... 187

Certificate Of Compliance .................................... 208

GPIB programming Example ................................ 209

PEL-5000C series USB Instruction ....................... 213

PEL-5000C series Auto, Sequence function provide EDIT, ENTER, EXIT, TEST and STORE 5 keys

operation ............................................................. 215

PEL-5000C series LAN Instruction ....................... 219

PEL-5000C User Manual

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 instrument or to other properties.

DANGER High Voltage

Attention Refer to the Manual

Earth (ground) Terminal

Frame or Chassis Terminal

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

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 safety symbols may appear in this manual or on the instrument.

SAFETY INSTRUCTIONS

General Guideline

CAUTION

 Do not place any heavy object on the

instrument. Note: Only 2 units can be stacked vertically.

 Avoid severe impact or rough handling that

leads to damaging the instrument.

 Do not discharge static electricity to the

instrument.

 Use only crimped wires, not bare wires, for the

terminals.

 Do not block the cooling fan opening.  Do not disassemble the instrument unless you

are qualified.

 The equipment is not for measurements

performed for CAT II, III and IV.

(Measurement categories) EN 61010-1:2010 specifies the measurement categories and their requirements as follows.

 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.

 0 is for measurements performed on circuits not directly

connected to Mains.

 Do NOT position the equipment so that it is

difficult to disconnect the appliance inlet or the power plug.

 If the equipment is used in a manner not

specified by the manufacturer, the protection provided by the equipment may be impaired.

Safety Guidelines

PEL-5000C User Manual

Power Supply

WARNING

 AC Input voltage range: 100-240VAC, Single

phase 90-250VAC

 Frequency: 47-63Hz  To avoid electrical shock connect the protective

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

 To avoid electric shock, the power cord

protective grounding conductor must be connected to ground. No operator serviceable components inside. Do not remove covers. Refer servicing to qualified personnel.

Cleaning

 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 containing harsh material

such as benzene, toluene, xylene, and acetone.

Operation Environment

 Location: Indoor, no direct sunlight, dust free,

almost non-conductive pollution (Note below)

 Temperature: 0°C to 40°C  Humidity: 0 to 85% RH  Altitude: <2000m  Overvoltage category II

SAFETY INSTRUCTIONS

(Pollution Degree) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The instrument 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  Temperature: -20°C to 70°C  Humidity: <90% RH

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.

PEL-5000C User Manual

PEL-5000C Series Introduction ............................. 10

Main Features ............................................................................... 10

Protection features ....................................................................... 11

Accessories ........................................................... 13

Operating Mode Description ................................ 14

CC Mode ....................................................................................... 14

CR mode ........................................................................................ 14

CV mode ........................................................................................ 14

CP mode ........................................................................................ 15

GETTING STARTED

The PEL-5000C series Electronic Load is designed to test, evaluation and burn-in of DC power supplies and batteries.

The PEL-5000C series high power electronic Load can be controlled locally at the front panel or remotely via computer over the GPIB/RS232/USB/LAN. Constant Current (CC) mode, Constant Resistance (CR) mode, and Constant Voltage (CV) mode. And Constant Power (CP) mode. The wide range dynamic load with independent rise and fall current slew rate and analog programming input with arbitrary wave-form input is available in Constant Current mode.

GETTING STARTED

Slew Rate ....................................................................................... 15

Dynamic Waveform Definition................................................. 17

Operating Area ...................................................... 20

Appearance ............................................................ 27

Front Panel .................................................................................... 27

LCD Display ................................................................................. 28

PEL-5000C User Manual

Features

 CC, CR, CV, CP, Dynamic, and Short Operating

Mode.

 Remote control via a choice of computer

interfaces.

 High accuracy & resolution with 16 bit voltage

and current meter.

 Built in pulse generators for dynamic loading.  Independently adjustable current rise and fall

times.

 Short circuit test with current measurement  Dedicated over current and overpower

protection test functions

 Programmable voltage sense capability.  Full protection from overpower, over-

temperature, overvoltage, and reverse polarity.

 Analogue programming input for tracking an

external signal

 Current Monitor with BNC (non-isolated)

socket.

 Digital Calibration  Advance Fan speed control  Ability to save load setup via the mainframe

memory (150 store/recall locations)

 Auto sequence function allowing test routines

to be set from the mainframe

PEL-5000C Series Introduction

Main Features

GETTING STARTED

Overvoltage protection

The Electronic Load will turn OFF Load OFF if the overvoltage circuit is tripped. The message OVP will be displayed on the LCD. When the OVP fault has been removed the load can be set to sink power again. While the unit will attempt to protect itself given an OVP state it is strongly advised to guard against any potential OVP fault state by using external protection and the correctly rated electronic load.

The Overvoltage protection circuit is set at a predetermined voltage and cannot be adjusted. The OVP level is 105% of the PEL-5000C series nominal voltage rating.

Caution

Never apply an AC voltage to the input of the PEL5000C series Load. Do not apply a DC voltage that is higher than PEL-5000C series Load rating. If this advice is ignored it is likely that damage will be caused to the electronic load module. This damage will not be covered by the warranty.

Over current protection (OCP)

The PEL-5000C series Electronic Load monitors the current level. The input to the load is automatically switched to LOAD OFF if the current is greater than 104% of the rated current input. If an over current condition occurs the display will show OCP.

Over power protection (OPP)

The PEL-5000C series Electronic Load monitors the power dissipation level. The input to the load is automatically switched to LOAD OFF if the power dissipation is greater than 105% of the rated power input. If an over power condition occurs the display will show OPP.

Protection features

The protection features of the PEL-5000C series Electronic load modules are as follows:

PEL-5000C User Manual

Over temperature protection

The load internal temperature at the heat sink is monitored. If the temperature reaches approximately 90°C the OTP message will be displayed and the unit will automatically switch to the LOAD OFF state. If an OTP error occurs please check the ambient temperature is between 0 to 40°C. Also ensure that the front and rear air vents of the mainframe are not obstructed. The air flow is taken from the front of the mainframe and exhausted from the rear. Therefore a suitable gap needs to be left at the rear of the mainframe. A minimum of 15cm is recommended. After a suitable cooling period the load can be switched.

Reverse Polarity

The PEL-5000C series load module will tolerate a reverse current up to the maximum current rating of the load module. The ‘-‘symbol will be shown on the voltage and current displays.

Caution

If a reverse polarity situation occurs the load will sink power even if the LOAD button is OFF. No current will be displayed on the PEL-5000C series load module.

Current up to the load’s maximum current rating will

be tolerated in reverse polarity. However there is no OVP OCP and OPP protection. It is strongly recommended that the load lines be fused if it is likely that the load could be subject to reverse polarity. These fuses should be fast acting and rated at the maximum current of the load module +5%.

GETTING STARTED

Standard Accessories

Description

PCs

PEL-5000C series operation manual

It can be downloaded from GW Instek website.

BANANA PLUGS

BNC – BNC CABLE

HD-DSUB 15PIN Parallel wire

1 Optional Accessories

Description

PCs

GPIB+RS232 interface

PEL-030

RS232 interface

PEL-023

GPIB interface

PEL-022

USB interface + USB driver (The driver can be downloaded from GW Instek website)

PEL-025

LAN interface + LAN driver (The driver can be downloaded from GW Instek website)

PEL-024

GPIB cable

GTL-250 GPIB Cable, 0.6m

GPIB cable

GTL-248 GPIB Cable, 2m

USB cable

GTL-246 USB Cable, 1.2m

PEL-5000C, AEL-5006, AEL-5008, AEL-5012 and AEL-5015 handle

PEL-028

1 PEL-5000C Hook Ring

PEL-026

Rack Mount Kit For PEL-5006C

PEL-027-1

Rack Mount Kit For PEL-5008C, PEL-5010C, PEL-5012C

PEL-027-2

Rack Mount Kit For PEL-5015C, PEL-5018C

PEL-027-3

Rack Mount Kit For PEL-5020C, PEL-5024C

PEL-027-4

Accessories

PEL-5000C User Manual

Background

With the operating mode of Constant Current, the PEL-5000C Series electronic load will sink a current in accordance with the programmed value regardless of the input voltage

CURRENT SETTING

LOAD

CURRENT

INPUT VOLTAGE

Background

At Constant Resistance mode, the PEL-5000C series electronic load will sink a current linearly proportional to the load input voltage in accordance with the programmed resistance setting

RESISTANCE

SETTING

LOAD

CURRENT

INPUT VOLTAGE

Background

At Constant Voltage mode, the PEL-5000C series electronic load will attempt to sink enough current

Operating Mode Description

CC Mode

CR mode

CV mode

until the load input voltage reaches the programmed value

VOLTAGE

SETTING

LOAD

CURRENT

INPUT VOLTAGE

CP mode

Background

At Constant Power mode, the PEL-5000C series electronic load will attempt to sink load power (load voltage * load current) in accordance with the programmed power.

POWER

SETTING

LOAD

CURRENT

INPUT VOLTAGE

Background

Slew rate is defined as the change in current or voltage over time. A programmable slew rate allows for a controlled transition from one load setting to another. It can be used to minimize induced voltage drops on inductive power wiring, or to control induced transients on a test device (such as would occur during power supply transient response testing).

In cases where the transition from one setting to

GETTING STARTED

Slew Rate

PEL-5000C User Manual

another is large, the actual transition time can be calculated by dividing the voltage or current transition by the slew rate. The actual transition time is defined as the time required for the input to change from 10% to 90% or from 90% to 10% of the programmed excursion.

In cases where the transition from one setting to another is small, the small signal bandwidth (of the load) limits the minimum transition time for all programmable slew rates. Because of this limitation, the actual transition time is longer than the expected time based on the slew rate.

Rise Time Transition Limitation

Therefore, both minimum transition time and slew rate must be considered when determining the actual transition time. Following detail description is excluding in specification sheet.

The minimum transition time for a given slew rate as about a 30% or greater load change, the slew rate increases from the minimum transition time to the Maximum transition time at a 100% load change. The actual transition time will be either the minimum transition time, or the total slew time (transition divided by slew rate), whichever is longer.

Example

PEL-5012C-600-840 600V/840A/12000W (CCH CCL >840Ax 30%)

GETTING STARTED

Use the following formula to calculate the minimum transition time for a given slew rate min transition time=252A/slew rate (in amps/second).

10.5uS (252A/24) x 0.8(10%~90%) =8.4uS

Use the following formula to calculate the maximum transition time for a given slew rate max transition time=840/slew rate (in amps/second).

35uS (840A/24) x 0.8(10~90%) = 28uS

EX. CCH=168A, CCL=0A Slew Rate =24A, the expected time is 5.6uS but the actual Transition

Time Will be limited to 4.8Us.

7uS (168/24 x 0.8(10%~90%) = 5.6uS

Note

When CC mode rang1 slew rate, CCL setting at least

0.1% larger than the specification.

Background

Along with static operation the PEL-5000C series electronic load are built with a dynamic mode for operation in Constant Current (CC), Constant Resistance (CR) or Constant Power (CP). This allows the test engineer to simulate real world pulsing loads or implement a load profile that varies with time.

A dynamic waveform can be programmed from the front panel of the PEL-5000C electronic load. The user would first set a High and low value of load current using the Level button. The Dynamic Setting then allows for the rise and fall time between these 2 current values to be adjusted. The time period that the waveform is high (Thigh) along with the time period that the waveform is low (Tlow) can also be set.

Dynamic Waveform Definition

PEL-5000C User Manual

Dynamic Wave form

LOAD

CURRENT

RISE

SLEW RATE

HIGH LOAD

LOAD

LOW LOAD

LEVEL

HIGHTLOW

FALL SLEW RATE

The dynamic waveform can also be set up via the optional computer interface. Dynamic waveform settings made from the front panel of the load module can also be saved in the memory of the PEL-5000C series Electronic Load. For the store/recall procedure and the computer command set please refer to the relevant operating manual for the PEL-5000C series Electronic Load.

Further dynamic waveform definitions are:

 The period of dynamic waveform is Thigh +

Tlow

 The dynamic frequency = 1 /( Thigh + Tlow )  The duty cycle = Thigh / ( Thigh + Tlow )

Example 1

PEL-5000C series, Dynamic up to 50 KHz frequency

Dynamic highest frequency 50 KHz = 0.02ms=20us

Setting THIGH=10 uS, TLOW=10uS, THIGH+TLOW=20uS

CCH-CCL/SR≦10uS

Setting CCH=30A, CCL=10A

(30-10)/2.5A/uS≦10 uS

8 uS≦10 uS ,Compliance with frequency 50KHz

Example 2

Setting THIGH=10 uS, TLOW=10uS, THIGH+TLOW=20uS

CCH-CCL/SR≦10uS

GETTING STARTED

Setting CCH=50A, CCL=0A

(50-0)/2.5A/uS=20uS, 20uS>10uS, It's not compliance the frequency 50 KHz

The analogue programming input also provides a convenient method of implementing a dynamic waveform.

PEL-5000C User Manual

PEL-5006C-150-600 power contour

150V

10V

600A

40A

6KW

Power Curve

Current

0.7V

Voltage

PEL-5008C-150-800 power contour

150V

10V

800A

53.3A

8KW

Power Curve

Current

Voltage

0.7V

PEL-5010C-150-1000 power contour

150V

10V

1000A

66.6A

10KW

Power Curve

Current

Voltage

0.7V

Operating Area

The PEL-5000C series electronic load can be operated for manual and GPIB operation.

The PEL-5000C series high power electronic Load can be controlled locally at the front panel or remotely via computer over the GPIB/RS232/USB/LAN. Constant current (CC) mode, constant resistance (CR) mode, and constant voltage (CV) mode and constant power (CP) mode. The wide range dynamic load with independent rise and fall current slew rate and analog programming input with arbitrary wave-form input is available in Constant Current mode.

GETTING STARTED

PEL-5012C-150-1200 power contour

150V

10V

1200A

80A

12KW

Power Curve

Current

Voltage

0.7V

PEL-5015C-150-1500 power contour

150V

10V

1500A

100A

15KW

Power Curve

Current

Voltage

0.7V

PEL-5018C-150-1800 power contour

150V

10V

1800A

120A

18KW

Power Curve

Current

Voltage

0.7V

PEL-5020C-150-2000 power contour

150V

10V

2000A

133.3A

20KW

Power Curve

Current

Voltage

0.7V

PEL-5000C User Manual

PEL-5024C-150-2000 power contour

150V

12V

2000A

160A

24KW

Power Curve

Current

Voltage

0.7V

PEL-5006C-600-420 power contour

600V

14.29V

420A

10A

6KW

Power Curve

Current

Voltage

10V

PEL-5008C-600-560 power contour

600V

14.29V

560A

13.33A

8KW

Power Curve

Current

Voltage

10V

PEL-5010C-600-700 power contour

600V

14.29V

700A

16.66A

10KW

Power Curve

Current

Voltage

10V

GETTING STARTED

PEL-5012C-600-840 power contour

600V

14.29V

840A

20A

12KW

Power Curve

Current

Voltage

10V

PEL-5015C-600-1050 power contour

600V

14.29V

1050A

25A

15KW

Power Curve

Current

Voltage

10V

PEL-5018C-600-1260 power contour

600V

14.29V

1260A

4.16A

18KW

Power Curve

Current

Voltage

10V

PEL-5020C-600-1400 power contour

600V

14.29V

1400A

33.33A

20KW

Power Curve

Current

Voltage

10V

PEL-5000C User Manual

PEL-5024C-600-1680 power contour

600V

14.29V

1680A

40A

24KW

Power Curve

Current

Voltage

10V

PEL-5006C-1200-240 power contour

1200V

25V

240A6A

6KW

Power Curve

Current

Voltage

15V

1000V

PEL-5008C-1200-320 power contour

1200V

25V

320A8A

8KW

Power Curve

Current

Voltage

15V

1000V

PEL-5010C-1200-400 power contour

1200V

25V

400A

10A

10KW

Power Curve

Current

Voltage

15V

1000V

GETTING STARTED

PEL-5012C-1200-480 power contour

1200V

25V

480A12A

12KW

Power Curve

Current

Voltage

15V

1000V

PEL-5015C-1200-600 power contour

1200V

25V

600A15A

15KW

Power Curve

Current

Voltage

15V

1000V

7.5A

PEL-5018C-1200-720 power contour

1200V

25V

720A

18A

18KW

Power Curve

Voltage

15V

1000V

PEL-5020C-1200-800 power contour

Current

1200V

25V

800A20A

20KW

Power Curve

Voltage

15V

1000V

10A

PEL-5000C User Manual

PEL-5024C-1200-960 power contour

1200V

25V

960A24A

24KW

Power Curve

Current

Voltage

15V

1000V

12A

GETTING STARTED

3 4

6 721

Power switch

LCD Multi-function display

System keys

Function keys

Test function keys

Number keypad

7 Knob setting

Appearance

Front Panel

LCD Display

6 7

10 11

Model number and sink ranges

The model number along with maximum voltage, current and power values are detailed in this position at the top of the load front panel.

Left 5 digit LCD display

The 5 digit LCD display is a multi-function display. The function of the display changes depending whether the user is in NORMAL mode or in a SHORT, OPP or OCP modes:

Status display: When enter System Setting or AUTO SEQUENCE, the display setting item.

Normal mode

The left 5 digit display displays the voltage present at the load’s input terminals. The value displayed will include the automatic voltage compensation if the sense terminals are also connected to the device under test (DUT).

Note

If V-sense is set to “AUTO” and the sense leads are connected to the DUT the losses need to be approx. 700mV (PEL-5006C-150-600) before the display compensates for the voltage loss.

If V-sense is set to “ON” and the sense terminals are connected to the DUT the load will check and compensate for all voltage drops.

PEL-5000C User Manual

GETTING STARTED

Test mode

If the SHORT, OPP or OCP buttons are pressed the left display will show a text Message that correlates with the selected test function.

 SHORT test selected: left display will show

“Short”.

 OPP test selected: left display will show

“OPP”.

 OCP test selected: left display will show

“OCP”.

During the test the left display will show the load Input voltage.

SEQ. indicator

When entering AUTO SEQUENCE mode, LCD indicator will light up.

REM LCD Indicator

If the REMOTE LCD Indicator is illuminated this means that the unit is operating remotely via one of the optional interfaces. While REMOTE is lit it is not possible to make settings manually at the front panel. The LOCAL button on the mainframe can be used to revert back to front panel control. When the unit is operating from the front panel the REMOTE LCD will not be illuminated.

LAN mode Lit

It is LAN interface inside.

DYN/STA LED Indicator

The DYN button allows the user to switch between DYNAMIC operation and STATIC operation. Dynamic operation is only possible in constant current (CC) or Constant power (CP) mode only. The LED next to the DYN button will become lit When DYNAMIC operation is selected. If you are in constant resistance (CR) or Constant voltage (CV) mode pressing the DYN button will have no effect.

Rang LED Indicator

The PEL-5000C series Load Module features 2 setting ranges for CC, CR, CV & CP operation. This allows improved resolution for setting

PEL-5000C User Manual

low values. When left in the default AUTO mode the changeover between ranges is automatic depending on the setting value entered.

If desired the RANGE button can be pressed to force the unit to operate only in ANGE II. This is signaled by the accompanying LED becoming lit.

Note

That it is only possible to force RANGE II in CC mode.

Level LED Indicator

or Low load value. The setting value changes between current, resistance, voltage or power depending whether CC, CR, CV or CP mode has been selected. If the LED is lit then the High level value setting has been enabled. If the LED is not lit then the low load level can be set using the rotary switch in combination with the arrow keys.

High and low load levels during operation.

only) the preset high and low levels are used to define the dynamic waveform.

Note The converse is also true in that the High level

cannot be set below the low level.

NG LCD Indicator

The user can adjust upper and lower limits for voltage, current and power within the CONFIG menu and turn the NG Indicator ON. If a voltmeter, ammeter or wattmeter measurement is outside these set limits then the NG indicator will illuminate.

GPIB mode Lit

It is GPIB inside. The LCD will be lit GPIB when Power ON. If PEL-5000C series is controlled by GPIB through PC, the GPIB will

GETTING STARTED

be lit.

RS232 mode Lit

It is RS232 inside. The LCD will be lit RS232 when Power ON. If PEL-5000C series is controlled by RS232 through PC, the RS232 will be lit.

USB mode Lit

It is USB interface inside.

The right 5 digit displays

The right 5 digit displays also changes function depending if the unit is in normal mode or one of the setting menus has been activated.

Display System Setting state or AUTO SEQUENCE setting value.

Normal mode

In normal mode the right 5 digit displays shows the power consumption in Watts (W).

Setting mode

The right display together with the rotary adjustment knob is used to set values.

The value changes according to the setting function that is active. The middle LCD provides a text message to tell the user which part of the setting menu is active.

Middle 5 digit LCD display

function depending if the user is in normal mode or has entered a setting menu Status display: When enter System Setting or AUTO SEQUENCE, the display setting item.

Normal mode

In normal mode the middle LCD display functions as a 5 digit ammeter. The 5 digit DAM shows the load current flowing into the DC load when the Load is ON.

Setting mode

If CONFIG, LIMIT, DYN, SHORT, OPP or OCP buttons are pressed the middle LCD show a text message according to the setting function it is in. Each subsequent press of the

PEL-5000C User Manual

button moves the display to the next available function.

The sequence of each setting menu is detailed below

 CONFIG:

Sequence is “SENSE”  ”LDon” “LDoff” ”POLAR”  “MPPT” ”CPRSP”  ”AVG”

 LIMIT:

Sequence is “Add.CV”  “V_Hi” ”V_Lo”  ”I_Hi”  “I_Lo”  ”W_Hi” ”W_Lo”  “NG”

 DYN setting:

Sequence is “T-Hi”  “T-Lo”  “RISE”  “FALL”

 SHORT:

Sequence is “PRESS”  “TIME”  “V_Hi”  “V_Lo”

 OPP:

Sequence is “PSTAR” “PSTEP”  “PSTOP“ “Vth”

 OCP:

Sequence is “ISTAR”  “ISTEP”  “ISTOP" “Vth”

PRESET mode

The value of the setting entered on the right display changes depending on the operating MODE that has been selected

 If CC mode is selected the right display

provides setting in amps "A".

 If CR mode is selected the right display

provides setting in ohms “Ω”

 If CP mode is selected the right display

provides setting in watts “W”.

 If CV mode is selected the right display

provides setting in volts “V”.

LIMIT

Each press of the LIMIT button changes the

GETTING STARTED

middle LCD text. The sequence and the corresponding setting value shown on the bottom display is as follows:

Set CC + CV or CP + CV upper limit voltage, the middle of the display show “Add.CV”, right display set value, the unit is V.

 V_Hi (left limit voltage) displays the set

value in volts “V”

 V_Lo (right limit voltage) displays the set

value in volts “V”

 I_Hi (left limit current) displays the set

value in amps “A”

 I_Lo (right limit current) displays the set

value in amps “A”

 W_Hi (left limit power) displays the set

value in watts “W”

 W_Lo (right limit power) displays the set

value in watts “W”

 NG displays whether the NG flag is set to

“ON” or “OFF”.

DYN Setting

Each press of the DYN setting button changes the text on the middle LCD. The sequence and the corresponding setting value shown on the bottom display are as follows:

 T-Hi (time high) displays the set value in

milliseconds “ms”

 T-Lo (time low) displays the set value in

milliseconds “ms”

 Rise (current rise time/slew rate) displays

the set value in “A/us” or “A/ms”

Fall (current fall time/slew rate) displays the set value in “A/us” or “A/ms”

CONFIG

Each press of the CONFIG button changes the right upper LCD Text.

The sequence and the corresponding setting

PEL-5000C User Manual

value shown on the bottom displays are as follows:

 SENSE can be set to “AUTO” or “ON”  LDon (load ON voltage) displays the set

value in volts “V”

 LDoff (load OFF voltage) displays the set

value in volts “V”

 POLAR (load polarity) can be set

to ”+LOAD” or “-LOAD”

 MPPT (Maximum power point tracking)  BATT1 (Battery Discharge)  BATT2 (Battery Discharge)  BATT3 (Battery Discharge)  CPRSP (CP RESPONSE)  AVG

SHORT test

This allows the parameters of the short test to be set up.

Each press of the SHORT button moves the setting function. The sequence of the short test along with the setting value is as follows:

 Short Press Start (pressing the

START/STOP button starts the test).

 TIME shows the duration of the SHORT

test. “CONTI”, on the bottom display indicates continuous. Time can be adjusted in “ms”.

 V-Hi (voltage high threshold) displays the

set value in volts “V”

 V-Lo (voltage low threshold) displays the

set value in volts “V”

When the test is started the right display will show RUN. When the test has finished the right display will show END.

OPP test

This allows the parameters of the over power protection test to be set up. Each press of the

GETTING STARTED

OPP button moves the setting function. The sequence of the OPP test along with the setting value is as follows:

 OPP Press Start (pressing the red

START/STOP button starts the test)

 PSTAR (power start point) right display

provides setting in watts “W”

 PSTEP (power steps) right display

provides setting in watts “W”

 PSTOP (power stop point) right display

provides setting in watts “W”

 VTH (voltage threshold) right display

provides setting in volts “V”

When the test is started the right display will show the power value being taken by the load. If the Device Under Test is able to supply the load according to the values set then the right display will show PASS and the right display will show the maximum power taken during the OPP test. If during the test, OTP is displayed the over temperature protection has been engaged. Similarly if OPP is shown on the display the over power protection has been activated.

OCP test

This allows the parameters of the over current protection test to be set up. Each press of the OCP button moves the setting function.

The sequence of the OCP test along with the setting value is as follows:

 OCP Press Start (pressing the red

START/STOP button starts the test)

 ISTAR (current start point) right display

provides setting in amps “A”

 ISTEP (current steps) right display

provides setting in amps “A”

 ISTOP (current stop point) right display

PEL-5000C User Manual

provides setting in amps “A”

 VTH (voltage threshold) right display

provides setting in volts “V”

When the test is started the right display will show the current value being taken by the load. If the Device under Test is able to supply the load according to the values set then the middle display will show PASS and the right display will show the maximum current taken during the OCP test. If during the test, OTP is displayed the over temperature protection has been engaged. Similarly if OPP is shown on the display the over power protection has been activated.

Mode and Indicators

There are four operating modes that can be selected by pressing the “MODE” key on the PEL-5000C series Electronic Load module. The sequence is Constant Current (CC), Constant Resistance (CR), Constant Voltage (CV), and Constant Power (CP). Each time the "MODE" key is pressed the operating mode is changed. The actual operating mode selected is indicated on the left hand side of the LCD.

OPP test

This allows the parameters of the over power protection test to be set up. Each press of the OPP button moves the setting function. The sequence of the OPP test along with the setting value is as follows:

 OPP Press Start (pressing the red

START/STOP button starts the test)

 PSTAR (power start point) right display

provides setting in watts “W”

 PSTEP (power steps) right display

provides setting in watts “W”

 PSTOP (power stop point) right display

provides setting in watts “W”

 VTH (voltage threshold) right display

GETTING STARTED

provides setting in volts “V”

PEL-5000C User Manual

Function keys description ..................................... 39

Test keys description ............................................ 53

System keys description ........................................ 68

Test keys description ............................................ 77

FUNCTION DESCRIPTION

Mode and CC, CR, CP, CV Indicator

Mode

SEQ

There are four operating modes. These can be selected in turn by pressing the “MODE” key on the PEL-5000C series Electronic Load module. The sequence is:

 (CC) Constant Current  (CR) Constant Resistance  (CP) Constant Power  (CV) Constant Voltage

The appropriate LCD will illuminate according to the operating mode is selected.

Load key and LED indicators

Load

On/Off

The input to the PEL-5000C Series electronic load can be switched ON/OFF by using the “LOAD” button. Indication of the ON/OFF state is provided by illumination of the button.

LOAD button lit = LOAD ON (load sinks according to the preset values)

LOAD button unlit = LOAD OFF (the load does not sink current)

Turning the LOAD OFF does not affect the preset values. When the LOAD ON state is enabled the unit will revert to sinking according to the preset values.

When the Load ON/OFF key is operated

Function keys description

PEL-5000C User Manual

the current taken by load will follow the RISE or FALL with time according to the preset rate. The current RISE and FALL times can be adjusted in the DYN Setting button of the front panel.

In addition to the LOAD ON/OFF function the user can also adjust the voltage level at which the unit will automatically start or stop sinking energy. The adjustable LDon and LDoff voltage levels are found within the CONFIG menu.

Please note that the LDoff level cannot be set higher than the LDon level.

Preset key and LED indicators

Preset

If the PRESET key is pressed the button will become lit indicating that the PRESET mode has been accessed. The lowest 5 digit display will change from showing the power consumption in watts to displaying the value to be preset. The value that can be programmed changes according to the operating mode that has been selected.

 Constant Current (CC) mode:

The A and B levels of load current can be preset at right lower 5 digit LCD. The “A” LED will be lit indicating the setting value is amps.

 Constant Resistance (CR) mode:

The A and B levels of load resistance can be preset on the right lower 5 digit LCD. The “Ω” LED will be lit indicating the setting value is ohms.

 Constant Voltage (CV) mode:

The A and B levels of load voltage can be preset on the right lower 5 digit LCD. The “V” LED will be lit indicating the setting value is volts.

 Constant Power (CP) mode:

FUNCTION DESCRIPTION

The A and B levels of load power can be preset on the right lower 5 digit LCD. The “W” LED will be lit indicating the setting value is watts.

 Dynamic mode (CC, CR or CP modes

only):

Preset key

DYN

STA

Each press of the DYN button cycles through the dynamic load settings. The DYN settings are used in conjunction with the High and Low levels of load current to define the dynamic waveform. Each press of the DYN button switches from T_Hi (time high), to T_Lo (time low), to Rise time and then to fall time. The middle LCD shows the section of the dynamic waveform which is programmed with the rotary knob and read from the right

display. The “ms” LED shows that the

settings are programmed in milliseconds.

Range key

Range

The PEL-5000C series Load Module features 2 setting ranges for CC, CR, CV & CP operation. This allows improved resolution for setting low values. When left in the default AUTO mode the changeover between ranges is automatic depending on the setting value entered.

If desired the RANGE button can be pressed to force the unit to operate only in RANGE II. This is signaled by the accompanying LED becoming lit.

Note

It is only possible to force RANGE II in CC mode.

PEL-5000C User Manual

Level key

Level

The LEVEL button is used to program a High or Low load value. The setting value changes between current, resistance, voltage or power depending whether CC, CR, CV or CP mode has been selected. If the LED is lit then the High level value setting has been enabled. If the LED is not lit then the low load level can be set using the rotary switch in combination with the arrow keys.

In STATIC mode the user can switch between High and low load levels during operation.

In DYNAMIC operation (CC & CP modes only) the preset high and low levels are used to define the dynamic waveform.

Note

The low level setting cannot exceed the high level. The converse is also true in that the High level cannot be set below the low level.

Limit key

Limit

The LIMIT button allows the user to set left and right thresholds for voltage, current or power. These threshold settings are used in conjunction with the NG function to flag when the load is operating outside the desired limit.

Each press of the LIMIT key enables a different value to be entered. On first press of the LIMIT key the button will illuminate Add.CV will be displayed on the middle LCD. The setting is made with the rotary knob and can be read from the right LCD during setting.

The setting sequence is shown below:

 Add.CV (CC+CV or CP+CV upper

limit)

 V_Hi (DVM upper limit)

FUNCTION DESCRIPTION

 V_Lo (DVM lower limit)  I_Hi (DAM upper limit)  I_Lo (DAM lower limit)  W_Hi (DWM upper limit)  W_Lo (DWM lower limit)  NG OFF/ON (No Good Flag)  LIMIT setting function OFF

The engineering unit is “V”, “A” or “W” depending on the threshold LIMIT being set.

Setting CC+CV or CP+CV upper limit voltage, Middle 5 digit LCD display ”Add.CV”, right 5 digit LCD display the unit is “V” ,The Add.CV set range from 0.00 V to 600.00V step 0.01V by rotating the Setting knob.

PEL-5000C User Manual

Setting upper limit voltage VH , Middle 5 digit LCD display “V-Hi”, right 5 digit LCD display the unit is “V” ,The V-Hi set range from 0.00 V to 600.00V step 0.01V by rotating the Setting knob.

Setting lower limit voltage VL, the right upper 5 digit monitor display ”V-Lo” and right lower monitor display lower limit of the voltmeter with the unit as “V” ,The VLo set range from 0.00 V to 600.00V step

0.01V by rotating the Setting knob.

Setting upper limit current IH , the right upper 5 digit monitor display ”I-Hi” and right lower monitor display upper limit of the voltmeter with the unit as “A”, the I-Hi set range from 0.000 A to 840.00A step

0.0001A by rotating the Setting knob.

Setting lower limit current IL , the right upper 5 digit monitor display ”I-Lo” and right lower monitor display lower limit of the voltmeter with the unit as “A”, the I-Lo set range from 0.000 A to 840.00A step

0.01A by rotating the Setting knob.

FUNCTION DESCRIPTION

Setting upper limit power WH, the right upper 5 digit monitor display ”W-Hi” and right lower monitor display upper limit of the voltmeter with the unit as “W”, the WHi set range from 0 W to 12000W step 1W by rotating the Setting knob.

Setting lower limit power WL, the right upper 5 digit monitor display ”W-Lo” and right lower monitor display lower limit of the voltmeter with the unit as “W”, the WLo set range from 0 W to 12000W step 1W by rotating the Setting knob.

Setting NG ON/OFF, When exceed VH, VL, IH, IL, WH, WL One of these whether NG on LCD display.

Limit

CC mode, press limits key to set the V-Hi and V-Lo voltage upper and lower limits of the GO / NG.

Current

Voltage

Load Current

Low

High

Limit

CC Dynamic Mode, press key to set the Level Hi and Level Low voltage upper and lower limits of the GO / NG.

PEL-5000C User Manual

Current

Voltage

Level Low

Low

High

Level Hi

Limit

CR mode, press limits key to set the V-Hi and V-Lo voltage upper and lower limits of the GO / NG.

Load Current

Low

High

Load input Voltage

Resistance

Limit

CV mode, press limits key to set the I-Hi and I-Lo Current upper and lower limits of the GO / NG.

Load lnput Voltage

Load Current

Low

High

Voltage

Limit

CP mode, press limits key to set the W-Hi and W-Lo power upper and lower limits of the GO / NG.

FUNCTION DESCRIPTION

DYN setting key

DYN

Setting

The DYN button allows the user to define the timings of the dynamic load Waveform. Firstly the high and low levels of load current will need to be set via the LEVEL switch. The RISE and FALL times between the low load current and the high load current along with the TIME the waveform is HIGH and the TIME LOW can is set via the DYN menu.

Each press of the DYN key enables a section of the DYNAMIC waveform to be set.

On first press of the DYN key the button will illuminate and T-Hi will be displayed on the middle LCD. The value is adjusted with the rotary knob and can be read from the right LCD during setting.

The setting sequence is shown below:

 T_Hi (time the waveform is high)  T_Lo (time the waveform is low)  RISE (rise time)  FALL (fall time )  DYN setting function OFF

The time that the waveform is high includes the rise time and is set in “ms”.

The time that the waveform is low

includes the fall time and is set in “ms”. The RISE and FALL time is set in “A/μs”.

PEL-5000C User Manual

The actual engineering unit is shown on the right of the Right 5 digit display

Press DYN setting key, LED will ON setting level High Period, Middle 5 digit LCD display will show “T-Hi” Right 5 digit LCD display will show setting value, the unit is “ms”, The T-Hi set range from

0.010 ms to 9999 ms step 0.001ms by rotating the setting knob.

There are four ranges from 0.010 ms to 9999 ms, the ranges are below:

 Range 1:0.010ms~9.999ms  Range 2:10.00ms~99.99ms  Range 3:100.0ms~999.9ms  Range 4:10000ms~9999ms

FUNCTION DESCRIPTION

Setting level Low period, Middle 5 digit LCD display will show “T-Lo”, right 5 digit LCD display will show setting value, the unit is “ms” , the T-Lo set range from

0.010 ms to 9999 ms step 0.001ms by rotating the Setting knob.

Setting rise time, Middle 5 digit LCD display will show “RISE”, right 5 digit LCD display will show setting value, the unit is “A/μs”, the RISE time set range from 0.672A/us to 42.840 A/us step

0.168A/us by rotating the Setting knob.

Setting fall time, Middle 5 digit LCD display will show “FALL”, right 5 digit LCD display will show setting value, the unit is “A/μs” , the FALL time set range from 0.672A/us to 42.840A/us step

0.168A/us by rotating the Setting knob.

Config key

Config

The CONFIG key allows the sense function to engage automatically or switched ON. The CONFIG key also enables the LOAD to automatically turn ON/OFF when a voltage level is reached. The polarity symbol can also be switched via the CONFIG menu.

Each press of the CONFIG key moves the menu on one step. On first press of the CONFIG key the button will illuminate and EXTIN will be displayed on the Right

PEL-5000C User Manual

upper LCD. The value is adjusted with the rotary knob and can be read from the right LCD during setting. The setting sequence is shown below:

 SENSE (AUTO or ON)  LDon (Voltage at which LOAD turns

ON)

 LDoff (Voltage at which LOAD turns

OFF)

 POLAR (change polarity symbol)  MPPT  CPRSP  Exit CONFIG options

Note

 The adjustable LDon (LOAD ON) voltage is valid for

CC, CR & CP operating modes. The adjusted LDon voltage will not operate in CV mode.

 The LDon (LOAD ON) voltage setting cannot be lower

than the LDoff (LOAD OFF) voltage. If 0V is required for both LOAD ON and LOAD OFF make the LOAD OFF adjustment first.

Set vsense and load input switching methods, the middle of the 5 digit LCD display will show “SENSE”, Right 5 digit LCD display will show “AUTO” or “ON”.

FUNCTION DESCRIPTION

Set Load ON voltage, the middle of the 5 digit LCD display will show “LDon”, Right 5 digit LCD display will show setting value, the units is V, The Load ON Voltage set range from 0.8V to 100.0V step

0.4V by rotating the setting knob. If the load is greater than the input voltage Load ON voltage setting, the Electronic load current begin to load on.

Note

CC/CR/CP MODE is controlled by Load ON voltage, CV MODE is not controlled by Load ON voltage.

Set Load OFF voltage, the middle of the 5 digit LCD display will show “LDoFF”, Right the 5 digit LCD display will show settings value, the units is V, The Load OFF Voltage set range from 0.0V to 99.00V step 0.01V by rotating The Setting knob. If the load input voltage is less than Load OFF setting voltage, the electronic load to load off.

Set Load polarity, the middle of the 5 digit LCD display will show “POLAR”, Right the 5 digit LCD display will show “+ LOAD” or “-LOAD”, use the knobs and key settings “+ LOAD” or “-LOAD”.

PEL-5000C User Manual

Set MPPT (Maximum power point tracking) testing, the middle of the 5 digit LCD display will show “MPPT”, Right the 5 digit LCD display “1000”, the MPPT setting range from 1000mS to 60000mS.

Set CPRSP, the middle of the 5 digit LCD display will show “CPRSP”, Right the 5 digit LCD display “0”, the CPRSP set range from 0 to 4 steps 1 by rotating the setting knob. Setting CP Mode reaction speed, 0: Fast, 4: Slow.

Set AVG, the middle of the 5 digit LCD display will show “AVG”, Right the 5 digit LCD display “1”, the AVG setting range from 1 to 64 steps 1 by rotating the setting knob.

FUNCTION DESCRIPTION

Item, Setting and Exit keys

Item

Setting

Exit

Item, Setting and Exit key for Test. There are eight operating modes. These can be

selected in turn by pressing the “Item “key. Press ITEM key enter setting mode,

ITEM LED light ON, the setting sequence is shown below:

 OCP  OPP  DISch  SURGE  Exit ITEM options

Test keys description

PEL-5000C User Manual

Setting Short mode

The Setting key allows the parameters of a SHORT circuit test to be entered. The SHORT test will attempt to sink high current up to the PEL-5000C series load maximum current in order to check the

power source’s protection and behavior.

The test time can be adjusted and threshold values for the High and low voltage limits set.

Setting

Pressing the Setting key once will cause the button to illuminate. The Message

“SHORT PRESS START” will be shown

across the 3 displays.

Setting

Each press of the SHORT key moves the menu on one step. The left and Middle LCDs show the currently selected test parameter as text. The value is adjusted by the rotary knob and can be read from the right display during Setting.

The setting sequence is shown below:

 SHORT PRESS START (pressing the

start/stop key starts test)

 SHORT Time (CONTI = Continuous or

100ms to 10,000ms possible)

 SHORT V_Hi (High voltage threshold

setting)

 SHORT V_Lo (Low voltage threshold

setting

 Exit SHORT test set-up

FUNCTION DESCRIPTION

Set the short test time, the LCD display show “SHORT” on left 5 Digits LCD display, shows “TIME” on middle 5 digits LCD display, right 5 digit LCD display ”CONTI”, the unit is “ms”.

TIME: Set the short test time, The LCD display show “SHORT” on left 5 digits LCD display, shows “TIME” on middle 5 digits LCD display the unit is “ms”, and shows “CONTI” on right 5 digits LCD display, the setting range is “CONTI” means continue, 100mS to 10000mS step 100mS by clockwise rotate the setting knob. The short test will be no time limitation when setting to CONTI until

press “START/STOP” key to stop the

short test.

PEL-5000C User Manual

V-Hi : Short test voltage check upper limitation setting, the LCD display shows “SHORT” on left 5 digit LCD display, Middle 5 digit LCD display ”V-Hi”, right 5 digit LCD display setting value, the unit is “V”, The V-Hi setting range from 0.00V to

600.00V step 0.01V by rotating the setting knob.

V-Lo : Short test voltage check lower limitation setting, the Left 5 digit monitor

display the “SHORT” ,the middle 5 digit monitor display the “V-Lo” and right

lower monitor display setting value, the unit is “V”. The range is 0.01V to 600.00V.

Start Stop

Once the test parameters have been entered the test is started by pressing the START/STOP button while the SHORT PRESS START text is displayed. During the test the bottom LCD will show run and the actual short current will be displayed on the right upper LCD.

Note

 The message PASS END will be displayed if the

measured voltage levels stay within the V_Hi and V_Lo threshold levels during the test.

 The message FAIL END will be displayed if the

measured voltage levels fall outside the V_Hi and V_Lo threshold levels during the test. The NG flag will also illuminate.

 If continuous short time is selected the test is ended

by pressing the red START/STOP button.

FUNCTION DESCRIPTION

OCP parameters setting

The OCP key allows the parameters of an Over Current Protection test to be entered. The OCP test will ramp up the load current in steps to validate the Device Under test’s (DUT) protection and behavior. A voltage threshold level can be set. If the voltage measured during the test is lower than the set Threshold voltage then the test will fail and the display will signal OCP ERROR. Similarly a current Threshold (I STOP) can be set. If the measured Current reaches the I STOP Threshold the test will be discontinued and the OCP ERROR message will be displayed.

Setting

Press the Setting key once will cause the

button to illuminate. The message “OCP PRESS START” will be shown across the 3

displays.

Each press of the OCP button moves the menu on one step. The Left and Middle LCDs show the currently selected test parameter as text. The value is adjusted by the rotary knob and can be read from the Right display during setting.

The setting sequence is shown below:

 OCP VTH OCP PRESS START

(pressing the red start/stop key starts test)

 OCP I STAR (current starting point of

the OCP test)

 OCP I STEP (value of incremental

current steps from I START)

 OCP I STOP (the OCP test’s upper

current threshold

 OCP Vth (the voltage threshold setting)  Exit OCP test set-up

PEL-5000C User Manual

ISTAR: setting the start current point, the Left 5 digit monitor display the “OCP”, the right upper 5 digit monitor display the “ISTAR”, and right lower monitor display setting value, the unit is “A”. The range is

0.001A to the full scale of the CC mode specification. The setting is by rotating the setting knob.

ISTEP: setting the increment step current point, The LCD display shows ”OCP” on Left 5 digit LCD display, Middle 5 digit LCD display ”ISTEP”, right 5 digit LCD display setting value, the unit is “A”. The setting range is 0.01A to the full scale of the CC mode specification. The setting is by rotating the setting knob.

FUNCTION DESCRIPTION

ISTOP: setting the stop current point, The LCD display shows “OCP” on Left 5 digit LCD display, Middle 5 digit LCD display “ISTOP”, right 5 digit LCD display setting value, the unit is “A”, the setting range is

0.000A to the full scale of the CC mode specification. The setting is by rotating the setting knob.

Vth: Setting threshold voltage; The LCD display shows “OCP” on left 5 Digit LCD display, middle 5 digit LCD display “Vth”, right 5 digit LCD Display setting value, the unit is “V”, the setting range is 0.00V to the full scale of the voltage specification. The setting is by rotating the setting knob.

Start Stop

Once the test parameters have been entered the test is started by pressing the red START/STOP button while the OCP PRESS START text is displayed. During the Test the middle LCD will show run and the actual current being Taken will be displayed on the Right LCD

Note

The message OCP ERROR will be displayed if the DUT fails the test. The reasons for failure are due to one of the following conditions:

(a) the voltage level of the DUT falls below the set

voltage threshold (OCP Vth)during the test

(b) The current taken from the DUT reaches the OCP I

STOP setting.

The message PASS will be displayed if the DUTs voltage stays above the set threshold. Also to PASS the OCP test the current taken from the DUT cannot equal the I STOP

PEL-5000C User Manual

setting.

If the DUT passes the OCP test the maximum current taken during the test is displayed on the right LCD.

Upon PASS or OCP ERROR the test will automatically stop. The red START/STOP button can be used during the test to immediately cease operation.

OPP parameters setting

The OPP allows the parameters of an Over Power Protection test to be entered. The OPP test will ramp up the load power in steps to validate the Device under test’s (DUT) protection and behavior. A voltage threshold level can be set. If the voltage measured during the test is lower than the set Threshold voltage then the test will fail and the display will signal OPP ERROR. Similarly a power threshold (P STOP) can be set. If the measured power reaches the P STOP threshold the test will be discontinued and the OPP ERROR message will be displayed.

Setting

Press the Setting key once will cause the

button to illuminate. The message “OPP PRESS START” will be shown across the

displays.

FUNCTION DESCRIPTION

Each press of the OPP button moves the menu on one step. The Left and Middle LCDs show the currently selected test parameter as text. The value is adjusted by the rotary knob and can be read from the Right display during Setting.

The setting sequence is shown below:

 OPP PRESS START (pressing the red

start/stop key starts test)

 OPP P STAR (power starting point of

the OPP test)

 OPP P STEP (value of incremental

current steps from P START)

 OPP P STOP (the OPP test’s upper

threshold power limit)

 OPP Vth (the voltage threshold setting)  Exit OPP test set-up

PSTAR: setting the start power, the LCD display shows “OPP” on left 5 digit LCD display, middle 5 digit LCD display ”PSTAR”, right 5 digit LCD display setting value, the unit is “W”, the setting range is 0.00W to the full scale of the CP mode specification. The setting is by rotating the setting knob.

PEL-5000C User Manual

PSTEP: setting the increment step power, the LCD display shows “OPP” on left 5 digit LCD display, middle 5 digit LCD display ”PSTEP”, right 5 digit LCD display setting value, the unit is “W”, the setting range is 0.00W to the full scale of the CP mode specification. The setting is by rotating the setting knob.

PSTOP: setting the stop power, the Left 5

digit monitor display the “OPP” ,the right

upper 5 digit monitor display the

“PSTOP”, and right lower monitor display setting value, the unit is “W”. The range is

0.1W to the full scale of the CP mode specification.

Vth : Setting threshold voltage; the Left 5

digit monitor display the “OPP” ,the right upper 5 digit monitor display the “Vth”,

and right lower monitor display setting value, the unit is “V”. The range is 0.00V to the full scale of the voltage specification. The setting is by rotating the setting knob.

Start Stop

Once the test parameters have been entered the test is started by pressing the red START/STOP button while the OPP RESS START text is displayed. During the Test the middle LCD will show run and the actual current being Taken will be displayed on the Right LCD

FUNCTION DESCRIPTION

Note

The message OPP ERROR will be displayed if the DUT fails the test. The reasons for failure are due to one of the following conditions:

voltage threshold (OPP Vth)during the test

(d) The current taken from the DUT reaches the OPP P

STOP setting.

The message PASS will be displayed if the DUTs voltage stays above the set threshold. Also to PASS the OPP test the current taken from the DUT cannot equal the I STOP setting.

If the DUT passes the OPP test the maximum current taken during the test is displayed on the right LCD.

Upon PASS or OCP ERROR the test will automatically stop. The red START/STOP button can be used during the test to immediately cease operation.

Battery discharge setting

Disch Mode CC

Disch Mode CP

DIsch the test function has 5 parameters,

“CC”, “VOLT.V”, “TIME.S”, “CAP.AH”

and CAP.WH parameters. Press the Setting key to set stop discharge

voltage “VOLT.V”, Press again Setting key to set stop discharge time “TIMES.S”.

Press Setting key again to stop discharge capacity “CAP.AH” / “CAP.WH”.

PEL-5000C User Manual

Setting battery discharge CC mode, DISCH CC, LCD show “DISch”, middle 5 digit LCD display “CC”, setting range 0.00A to full scale.

Setting stop discharge voltage STOP

“VOLT.V”, middle 5 digit LCD display “VOLT.V”, right 5 digit LCD display setting value, unit is V, STOP “VOLT.V”

setting range 0.00V to full scale.

Setting stop discharge time, setting STOP

“TIME.S”, middle 5 digit LCD display “TIME.S”, right 5 digit LCD display setting value, STOP “TIME.S” setting OFF to

99999, each setting knob and button adjustment interval is 1.

FUNCTION DESCRIPTION

Setting stop discharge capacity, setting STOP “CAP.AH”, middle 5 digit LCD display “CAP.AH”，right 5 digit LCD

display setting value, STOP “CAP.AH”

setting range OFF to 19999.9, each setting knob and button adjustment interval is 0.1.

Setting stop discharge capacity, setting

STOP “CAP.WH”, middle 5 digit LCD “CAP.WH”, right 5 digit LCD display setting value, STOP “CAP.WH” setting

range OFF to 19999.9, each setting knob and button adjustment interval is 0.1.

Surge current testing setting

SURGE sequence is shown below: SURGE the test function has 4 parameters,

“SUR.I”, “NOR.I’, “TIME” and “STEP”

parameters.

 Press the Setting key to set surge

current testing loading current value “SUR.I”.

 Press again Setting key to set normal

current testing loading current value “NOR.I”.

 Press Setting key again to set surge

current testing time “TIME”.

 Press the Setting key again to set surge

current testing diminishing step current setting value “STEP”.

PEL-5000C User Manual

Set SURGE testing surge current, unit is A, setting range 0.00A to full scale.

Set SURGE testing normal current, unit is A, setting range 0.00A to full scale.

Set SURGE time, unit is mS, setting range 10mS to 1000mS.

Set SURGE step, setting range 1 to 5.

Setting fig explanation.

FUNCTION DESCRIPTION

Exit Key

Exit

Setting OCP / OPP / DISch / SURGE during the setting process press Exit key to exit setting item.

Start/Stop key

Start Stop

The START/STOP key is used in conjunction with the SHORT, OCP or OPP test functions. It is used to START a test according to the set parameters or to STOP a test before PASS or FAIL is signaled. Please refer to the preceding sections for more information on the SHORT, OCP & OPP tests.

PEL-5000C User Manual

Shift key

Shift

Shift key is used to switch the key to the second function key.

System key

System

Press SYSTEM to set the argument, GPIB address, RS232 BAUD- RATE, WAKE UP and buzzer Alarm power ON/OFF and Master/Slave control.

Local key

Local

Press Local key to exit REMOTE mode

System keys description

FUNCTION DESCRIPTION

Setting system parameters

Set GPIB address, RS232 BAUD RATE, WAKE UP, Buzzer ON/OFF

Set GPIB address

System

First press SYSTEM key, the LCD display shows GPIB on left 5 digit LCD display, Middle 5 digit LCD display Addr, right 5 digit LCD display setting GPIB address of the representative, Press UP, DOWN buttons to adjust the GPIB address 1~30, Key and then press ENTER, PEL-5000C series GPIB Address value is saved, Press system key four times to leave the GPIB address configuration State.

Set RS232 BAUD RATE

System

SYSTEM key first by the second, the LCD display shows RS232 on left 5 digit LCD display, Middle 5 digit LCD display baud, right 5 digit LCD display setting BAUDRATE, Press UP, DOWN buttons to adjust the value of BAUD RATE, Key and then press ENTER, PEL-5000C series is saved setting BAUD RATE, press system key three times to leave the BAUD-RATE setting state.

PEL-5000C User Manual

WAKE-UP function

System

This function is designed for auto setting the load status and load level in turning on the PEL-5000C series every time. SYSTEM key first by the three, The LCD display shows WAKE on left 5 digit LCD display, Middle 5 digit LCD display UP, right 5 digit LCD display setting, Press UP, DOWN buttons to adjust the 0~150.

Press ENTER key to be stored, press system key two times to leave the WAKEUP setting state, If set to “0” means do not call.

FUNCTION DESCRIPTION

Buzzer ON/ OFF

This is the test set automatically (AUTO SEQUENCE) at the end, if it increases buzzer function, if set to ON, Then when the test result is PASS automatically when the buzzer will call out, if the test result is FAIL when the buzzer will call the second tone.

System

Setting method: first by 4 Times SYSTEM key and the LCD

display shows SEQ on left 5 digit LCD display, Middle 5 digit LCD display bEEP, right 5 digit LCD display setting ON or OFF, press UP DOWN key to adjust.

Note

Setting system parameters, if the input is required to use the KEYPAD ENTER button to confirm, otherwise PEL5000C Series will not save the changes the settings.

Pass: Automatic test mode, no NG state, is the PASS. Fail: Automatic test mode, any test if the NG then is the FAIL.

Recall/ Store key

Recall

Store

Recall/ Store load state settings

The function keys on the front panel of PEL-5000C series mainframe are designed for high testing throughput purpose. There are 150 operation states or testing steps can be store in the EEPROM memory of PEL5000C series electronic load respectively, each state can store or recall the load status and level for electronic load simultaneously.

PEL-5000C User Manual

STORE process

Recall

Store

to enter the storage state.

adjust, press the ENTER OK to save the STATE.

RECALL operation

Recall

Store

adjust.

In the electronic load front panel, set the value that would call out the information in accordance with re-setting.

AUTO SEQUENCE instructions

PEL-5000C series has AUTO SEQUENCE function, PEL-5000C series to select the state F1~F9 Automatic testing can be edited, 16 steps each group can be set to select 150 group of the STATE, within each step can be set TEST TIME Units of 100 ms range (0.1s ~ 9.9s).

Edit mode

Shift

Mode

SEQ

Press SHIFT key, press the SEQ. key to enter the AUTO SEQUENCE mode, Press UP, DOWN key to select EDIT, the LCD display shows EDIT on left 5 digit LCD display, Middle 5 digit LCD display FX, “FX” means to Select the state F1-F9,Press keypad key 1 ~ 9 choose F1 ~ F9.

FUNCTION DESCRIPTION

 Press ENTER key, the LCD display

shows FX-XX on left 5 digit LCD display, Middle 5 digit LCD display STATE, right 5 digit LCD display

setting 1~150, “FX” means to select the

state F1-F9. “XX” means the test STEP01-16, setting state value, press UP and down key or keypad to adjust setting.

Test time setting

 Press ENTER to set TIME value, press

UP, DOWN keys or KEYPAD to adjust settings, range from 100 ms~9999ms. Press ENTER key or SAVE key to finish editing the action is set to repeat, if you do not save the settings, press the EXIT key to leave edit mode.

 Setting repeat (REPEAT TEST) ,Press

UP and DOWN key or Keypad to adjust setting 0~9999, Press ENTER SAVE REPEAT Value, or press eXIT key Exit EDIT MODE.

PEL-5000C User Manual



Store (Edit) mode operation flow chart

FUNCTION DESCRIPTION

Test mode

 Press SHIFT key, press the SEQ. key to

enter the AUTO SEQUENCE mode, Press UP, DOWN key to select TEST, the LCD display shows tEST on left 5 digit LCD display, Middle 5 digit LCD display FX, “FX” means to Select the state F1-F9, Press keypad key 1 ~ 9 choose F1 ~ F9. When the press ENTER to enter. The next automatic test Mode.

 Test LCD will display "SXX", "XX" on

behalf of the test of STEP, if the test result is NG, the LCD will show "NG" (flashing) and suspension of the test, this time users can test or ENTER key to continue Press EXIT key to leave the test mode, test mode by the (STEP01 TIME) then (SETP02 - TIME) until all the steps done or press EXIT to leave the test mode.

 If all the test steps are OK, the test

result is PASS, LCD displays “PASS”; test procedure if any of the NG, the test result is FAIL,, LCD displays “FAIL”, if the buzzer is set to ON, when the test result is pass automatically when the buzzer will call out, if the test result is fail Buzzer will sound when the second call.

When the test is completed, the user can press the ENTER key again to test or EXIT key to leave the test mode.

Example

 Edit the 16 step test is completed, press

the TEST key, according to the order of S01 ~ S16 test is complete LCD display PASS.

PEL-5000C User Manual



Test mode operation flow chart

FUNCTION DESCRIPTION

Rotary Knob and ARROW Keys

The ROTARY knob and ARROW keys are used to increase or decrease the set values.

 Clockwise the rotary switch and up arrow key to increase the

setting values.

 Anti-clockwise and down arrow key operation of the ROTARY

Knob decreases the setting value.

 Keypad key: When using the

Keypad, please enter the number, press the Enter key.

 Clear KEY: Setting, press the

Clear key to clear the input value.

Test keys description

PEL-5000C User Manual

Note

In CR mode, the up arrow key and clockwise operation of the rotary Knob reduces the resistance.

In CR mode, the down arrow key & anti-clockwise operation of the rotary Knob increases the resistance.

CONNECTION

Rear Panel ............................................................. 80

Connecting the I-monitor to an oscilloscope ......... 84

Master/Slave Instructions ..................................... 85

CONNECTION

Rear Panel

INPUT

ANALOG

MONITOR

CONTROL

MASTER / SLAVE

N L

WARNING

TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE

DO NOT REMOVE COVERS.

250V FUSE OF THE SPECIFIED TYPE AND RATING.

FOR CONTINUED FIRE PROTECTION. REPLACE FUSE ONLY WITH

NO OPERATOR SERVICEABLE COMPONENTS INSIDE.

GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.

REFER SERVICING TO QUALIFIED PERSONNEL.

SER. NO. LB

SENSE

LINE INPUT

BREAKER

MAX.

100 240VAC

47 63Hz

LOAD

MAX. MAX.

LOAD

150V 150V 150V

400VA MAX.

DC INPUT Terminal

The positive (LOAD +) and negative (LOAD -) power input terminals are clearly marked. DO NOT confuse them with the smaller SENSE terminals.

Please ensure that the voltage and current rating of the DUT do not exceed the maximum rating of the PEL-5000C Series load module being used. Please also check the output polarity of the DUT prior to connection and testing.

The negative load terminal should be connected to ground if testing a positive output power supply. This is normally achieved when the negative output of the power supply is grounded.

Similarly if a power supply with a negative output is to be tested then the positive load terminal should be grounded. This is normally achieved when the positive output of the power supply under test is grounded.

PEL-5000C User Manual

CONNECTION

V-sense input terminal

The V-sense terminals can be used to compensate for a voltage drop in the load lines between the power supply and the PEL-5000C series Electronic Load. This is a useful feature useful when the load current is relatively high.

If remote sense is required the V-sense terminals are connected to the appropriate positive and negative terminals of the power supply as shown in fig below. In the CONFIG menu the V-sense function can be set to AUTO or ON.

Please note that if V-sense is set to AUTO and the sense leads are connected to the DUT the losses need to be approx. before the display compensates for the voltage loss.

If V-sense is set to ‘ON’ and the sense terminals are connected to the DUT the load will check and compensate for all voltage drops.

The maximum voltage sense compensation is the same as the rating of the PEL-5000C series electronic load. For example the PEL-5006C1200-240 is capable of sinking current at up to 1200Vdc. Therefore the maximum V-sense is also 1200Vdc.

INPUT

ANALOG

MONITOR

CONTROL

MASTER / SLAVE

N L

WARNING

TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE

DO NOT REMOVE COVERS.

250V FUSE OF THE SPECIFIED TYPE AND RATING.

FOR CONTINUED FIRE PROTECTION. REPLACE FUSE ONLY WITH

NO OPERATOR SERVICEABLE COMPONENTS INSIDE.

GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.

REFER SERVICING TO QUALIFIED PERSONNEL.

SER. NO. LB

SENSE

LINE INPUT

BREAKER

MAX.

100 240VAC 47 63Hz

LOAD

MAX. MAX.

LOAD

150V 150V 150V

400VA MAX.

INPUT

ANALOG

MONITOR

CONTROL

MASTER / SLAVE

N L

WARNING

TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE

DO NOT REMOVE COVERS.

250V FUSE OF THE SPECIFIED TYPE AND RATING.

FOR CONTINUED FIRE PROTECTION. REPLACE FUSE ONLY WITH

NO OPERATOR SERVICEABLE COMPONENTS INSIDE.

GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.

REFER SERVICING TO QUALIFIED PERSONNEL.

SER. NO. LB

SENSE

LINE INPUT

BREAKER

MAX.

100 240VAC

47 63Hz

LOAD

MAX. MAX.

LOAD

150V 150V 150V

400VA MAX.

UUT UUT

Typical connection of PEL-5000C series load module

I-monitor

The I-monitor is provided as a BNC socket. It is

PEL-5000C User Manual

designed to enable the user to monitor the

Electronic Load’s input current or short current.

The I-monitor’s signal is 0V to 10V. This signal is proportional to the full scale current that the particular electronic Load is capable of.

Example

PEL-5012C-600-840: Imax = 840A therefore Imonitor 10V = 840A so 1V = 84A

IMonitor

Ref_V

Shunt R

MOSFET_Nch

Power Supply

12V

Load+

Load-

Drain

source

Gate

An equivalent circuit in terms of the current monitor

Analog programming input

The Electronic Load has an analog programming input on the rear panel of the mainframe. The analogue programming input enables the load module to track and load according to an external 0-10V (ac or ac + dc) signal.

The analog programming input is configured as a BNC socket on the mainframe’s rear panel.

The analogue programming input operates in CC or CP modes only. The PEL-5000C series Load will attempt to load proportionally

according to the signal and the load module’s

maximum current or power range. For example: PEL-5012C-600-840: Imax = 840A and Pmax = 12000W

CONNECTION

So in CC mode if analogue programming input is 5V = 420A load setting (Range II) or in CP mode if analogue programming input is 1V = 1200W load setting (Range II)

The analog programming signal can act alone or

it can be summed with the programmed value set via the front panel or the optional computer interface (GPIB, RS-232, USB, or LAN) or the front panel.

Example

Fig. below shows the result of an analog programming signal at 4 Vac, 500Hz when it is summed with a 128A programmed setting in CC mode of PEL-5012C-600-840 Load.

Analog programming example

2mS

LOAD CURRENT

168A

336A

504A

ANALOG V

PEL-5000C User Manual

(Correct) Connections to an oscilloscope

(Wrong) Connections to an oscilloscope

If the probes connection is reversed as shown above, a large current would flow through the probe and the internal circuitry of the oscilloscope is likely to be damaged.

PEL-5000C series

Connecting the I-monitor to an oscilloscope

When you connect this product to an oscilloscope, please ensure the correct polarities of the connecting probes as shown in fig below

CONNECTION

PEL-5000C Series “MASTER / SLAVE” Parallel function, 1 Master, 7 SLAVE, setting method press the System key to set the CONTROL MODE to select ALONE, MASTER or SLAVE1 ~ 7, Press the ENTER key to set, when Power off Data will not be lost, this parameter is saved. Master will automatically detect whether there is slave machine, if there is no Slave Machine will run

“ALONE Mode”, if the Slave machine will run “MASTER Mode”. Master machine measuring

current and power meter is to show the total current and total power (Master + Slave), the voltage meter is displayed by the Master Machine, the Slave machine voltage meter position will display “SL1” ~ “SL7”.

The following procedure should be followed before applying power on Master/Slave mains: Step1. Turn on (O) the Slave POWER switch. Step2. Turn on (O) the Master POWER switch.

The following procedure should be followed before applying power off Master/Slave mains: Step1. Turn off (I) the Master POWER switch. Step2. Turn off (I) the Slave POWER switch.

Master/Slave Instructions

PEL-5000C User Manual

Parallel method

Use HD-DSUB 15pin 1: 1 Cable to connect the MASTER and SLAVE rear panel, HD-DSUB 15pin connector (connect the upper and lower Connectors)

Caution

Do not use VGA Cable, because of internal pin4 ~ 8, 11 and chassis short circuit.

CONTROL

MASTER / SLAVE

Wiring requirements

Master/Slave, It requires wiring as follows:

Manual operation

(PEL-5012C-600-840 MASTER/SLAVE model the following is example)PRESET setting: CC/CR/CV/CP Mode as Figure，CC setting 64A=Master 32A + Slave 32A，

CR:12500Ω=Master//Slave=6250Ω//6250Ω, CV:

100V=Master 100V=Slave=100V， CP:1000W=Master 500W + Slave 500W.

CC Set 100A

Master Display

CONNECTION

Slave Display

CR Set 12500Ω

Master Display

Slave Display

CP Set 1000W

Master Display

Slave Display

CV Set 100V

Master Display

Slave Display

Note Master Mode operation except CC / CR / CV / CP

Mode, The following functions will be disabled.

 Config function BATT type 1~N Disable  Config functions MPPT disable.  CC+CV, CP+CV Disable.  Recall/Store Disable.  Auto Seq. Disable.  Short, OCP, OPP Disable.

PEL-5000C User Manual

Check line voltage ................................................. 89

Grounding requirements ....................................... 89

Power up .............................................................. 90

Connection to the load Input Terminal .................. 90

GPIB & RS232 interface option ............................. 91

RS232 interface option .......................................... 92

GPIB interface option ........................................... 92

USB interface option ............................................. 92

LAN interface option ............................................ 93

I/O connection ..................................................... 93

Load current slew rate setting ............................... 94

Load wire inductance ............................................ 96

INSTALLATION

Background

The PEL-5000C Series high power load can operation with 100 Vac ~240Vac input as indicated on the label on the rear panel. Make sure that the factory check mark corresponds to your nominal line voltage. Skip this procedure if the label is corrected marked.

Installation

1. With the PEL-5000C Series load power OFF,

disconnect the power cord.

2. Refer the drawing on the rear panel of PEL-

5000C Series high power load below.

PEL-5000C series AC Input Connection

N L

LINE INPUT

Installation

1. It is requested to use the 3Pin plug connector

only for PEL-5000C Series mainframe to out of danger when electric leakage. And the complete and proper grounded is necessary.

2. The PEL-5000C Series high power load is

equipped with three conductor cable which plugs in an appropriate receptacle to ground the instrument's cover.

Check line voltage

Grounding requirements

PEL-5000C User Manual

Procedure

1. Turn off (O) the POWER switch.

2. Check that the power cord is corrected.

3. Check that nothing is connected to the DC

INPUT on the rear panels.

4. Turn on POWER switch.

Procedure

1. Turn off POWER switch.

2. Check that the output of the equipment under

test is off.

3. Connect the load wire to the load input

terminal on the rear panel.

4. Check the polarity of the connection and

connect the load wire to the output terminal of the equipment under test.

Note

Avoid equipment damaged, don’t input the DC voltage standard output to the DC Load input terminal, if calibration voltage meter required, please input the DC voltage standard to the Vsense input.

Power up

Connection to the load Input Terminal

Connection procedure of the load input terminal on the rear panel

INSTALLATION

Procedure

1. GPIB + RS232 interface is on the rear panel of

PEL-5000C Series Mainframe for application GPIB or RS232 .

2. GPIB and RS232 interface can only be used at

the same time, to change the interface must reboot unit.

3. GPIB connection with three important

limitations as described below:

The maximum number of devices including the controller is no more than 15.

The maximum length of all cable is no more than 2 meters times the number of devices connected together, up to 20 meters Maximum.

RS232 female block connections on the back panel, the connecting device and the computer RS232 port to one-way connection.

The figure below shows the RS232 connector (Female) on the rear panel connects PEL-5000C Series Mainframe to RS232 port of computer in one by one configuration .The RS232 BAUD-RATE can be set in the front panel, it will be lit the GPIB address when press the “SYSTEM” button. Press it again, it will be lit the BAUD-RATE.

PEL-5000C Series GPIB & RS232 interface

GPIB & RS232 interface option

Connection procedure of the load input terminal on the rear panel

PEL-5000C User Manual

The figure below shows the RS232 connector (Female) on the rear panel connects PEL-5000C Series mainframe to RS232 port of computer in one by one configuration. The RS232 BAUD-RATE can be set in the front panel, it will be lit the GPIB

address when press the “SYSTEM” button. Press it

again, it will be lit the BAUD-RATE.

PEL-5000C Series RS232 interface

The maximum number of devices including the controller is no more than 15.

The maximum length of all cable is no more than 2 meters times the Number of devices connected together, up to 20 meters maximum.

PEL-5000C Series GPIB interface

The figure below shows the USB connector in the rear panel of PEL-5000C Series mainframe.

RS232 interface option

Connection procedure of the load input terminal on the rear panel

GPIB interface option

Connection procedure of the load input terminal on the rear panel

USB interface option

Connection procedure of the load input terminal on the rear panel

INSTALLATION

PEL-5000C USB interface

The figure below shows the LAN connector in the rear panel of PEL-5000C Series mainframe.

PEL-5000C LAN interface

PEL-5000C series I/O Interface with Vsense, Analog Programming Input, Imonitor

PEL-5000C series I/O interface

SENSE

INPUT

ANALOG

MONITOR

LAN interface option

Connection procedure of the load input terminal on the rear panel

I/O connection

Connection procedure of the load input terminal on the rear panel

PEL-5000C User Manual

What is the load current slew rate during load current level change, power supply turn ON/OFF switch between ON, and OFF? The PEL-5000C series Electronic load provides all of the above load current slew rate in controllable condition, the rise and fall current slew rate can be set independently from front panel operation or remote programming.

The slew rate determines a rate at which the current changes to a new programmed value. The slew rate can be set at the front panel or via GPIB on the rear panel of PEL-5000C series high power load.

The rise and fall slew rate can be independently programmed from 384mA/usec to 24A/usec (PEL-5012C-600-840 Load) in the 840A current range and from 38.4mA/usec to 2.4A/usec in the 84A current range. This allows a independent controlled transition from Low load current level to High load current level ( Rise current slew rate ) or from High load current level to Low load current level( Fall current slew rate ) to minimize induced voltage drops on the inductive wiring, or to control induced transients on the est. device ( power supply transient response testing ).

This controllable load current slew rate feature also can eliminate the overload current Phenomenon and emulate the actual load current slew rate at turn ON the power supply Under test. The load current slew rate is according to the power supply's Output Voltage, Load level setting and Load ON/OFF switch. So, you could do all items of Power

Load current slew rate setting

Connection procedure of the load input terminal on the rear panel

INSTALLATION

Supply testing task by using constant current mode only, it can significantly improve The Testing quality and Process as well as efficiency.

There are two load current range in PEL-5000C series Load, Range I and Range II, the slew rate of range I, range II, RISE/FALL slew rate are listed in paragraph specifications.

The relationship of load current load ON/OFF, load level and output voltage of DC power supply at turn ON

HIGH

LOW

HIGH

LONOFF

LOAD

(A)

TYPICAL

POWER

SUPPLY

OUTPUT

VOLTAGE

(B)

LOAD ON/OFF SWITCH

(C)

LOAD CURRENT WAVEFORM

WITH DIFFERENT LOAD

CURRENT SLEW RATE

(D)

LOAD LEVEL CHANGE

BETWEEN HIGH AND

LOW LOAD LEVEL

PEL-5000C User Manual

The load wiring has an inductance (L). When the current (I) varies in short time period, It generates a large voltage at both ends of the wiring cable. This voltage applies to all of the load input terminals of the PEL-5000C Series when the impedance of the EUT is relatively small. The voltage generated by the load wire inductance (L) and the current variation (I) is expressed using the following equation.

E = L x (ΔI /ΔT) E: Voltage generated by the wire inductance L: Load wire inductance

ΔI: Amount of Current variation ΔT: Variation period of current

PEL-5000C series

Load wire inductance

Connection procedure of the load input terminal on the rear panel

INSTALLATION

In general, the wire inductance can be

measured approximately 1 μH per 1 meter. If

the 10 meters of Load wires is connected between the EUT and the electronic load (PEL5000C Series) with the current Variation of 2

A/μs, the voltage generated by the wire

inductance Will be 20 V. The negative polarity of the load input terminal

is the reference potential of the external Control signal, Therefore, the device connected to the external control terminal may get malfunctioned.

When operating under the constant voltage (CV) mode or constant resistance (CR) mode or constant power (CP), the load current is varied by the voltage at the load input terminal, so the operation can be affected easily by the generated voltage.

The wiring to the EUT should be twisted and the shortest as possible.

If the load wire is long or has a large loop, the wire inductance is increased. Consequently, the Current variation that results when switching occurs will cause a large voltage drop.

When the value of instantaneous voltage drops under the minimum operating voltage depends on the generated voltage at the load input terminal, the response of recovery will be extensively delayed.

In such event, the electronic load may generate unstable oscillation. In such condition, the input voltage may exceed the maximum input voltage and Cause damage to the PEL-5000C Series.

PEL-5000C User Manual

Waveform example: Generate unstable oscillation

CH1= Imonitor CH2=Power Supply output Voltage (x10) CH3= LOAD Input Voltage (x10)

Instek PEL-5006C-150-600, PEL-5008C-1200-320, PEL-5024C-600-1680, PEL-5008-150-800, PEL-5010C-150-1000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual