Page 1
User’s Guide
EL30000 Series
DC Electronic Loads
Page 2
Notices 6
Copyright Notice 6
Manual Part Number 6
Edition 6
Published by 6
Warranty 6
Technology Licenses 6
U.S. Government Rights 7
Third Party Licenses 7
Waste Electrical and Electronic Equipment (WEEE) 7
Declarations of Conformity 7
Safety Information 8
Safety and Regulatory Information 9
Safety Considerations 9
Safety Symbols 12
Regulatory Markings 13
South Korean Class A EMC declaration: 13
Safety and EMC Requirements 13
Environmental Conditions 14
1 Getting Started 15
Product Introduction 16
Front panel at a glance (EL33133A/EL34143A) 18
Front panel at a glance (EL34243A) 19
Rear panel at a glance (EL33133A/EL34143A) 20
Rear panel at a glance (EL34243A) 21
Meter view 22
Data logger view 24
Scope view 25
Dimension diagram 26
Setup the instrument 26
Prepare Instrument for Use 27
Initial inspection 27
Standard shipped items 27
Documentation and firmware revisions 27
Recommended calibration interval 27
Load Operating Modes 28
CC mode 28
CV mode 29
CP mode 29
CR mode 30
Programming Ranges 31
Installation 33
Connecting the power cord 33
Connecting the inputs 34
Parallel connections (EL34243A only) 37
4-wire sense connection 39
Interface connections 41
Installing the optional GPIB interface (EL34143A and EL34243A only) 45
Rack mounting the instrument 46
Remote Interface Configuration 47
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Keysight IOLibraries Suite 47
GPIB configuration 47
LAN configuration 48
Using sockets 52
More about IP addresses and dot notation 53
Remote Control 54
Web interface 54
Technical connection details 56
Use the Built-in Help System 57
View the help information for the front panel key 57
View the list of help topics 57
Firmware Update 59
Front Panel Menu Reference 60
2 General Operating Information 61
Turning the Unit On 62
Using the front panel knobs 63
View the error log 63
Controlling the Inputs 64
Step 1 - Select an input (EL34243A only) 64
Step 2 - Set the load operating mode 64
Step 3 - Set the input voltage, current, resistance, or power 64
Step 4 - Enable the input 65
Step 5 - View the input voltage and current 65
Using the Protection Function 67
Protection function 67
Configuring protection 67
Clears OVP, OCP and OPP Event 69
Specifying 2-Wire or 4-Wire Sense 70
Configuring the Input Turn-On/Turn-Off Sequence 71
Step 1 – Set the input voltage, current, power or resistance of the input channels: 71
Step 2 – Configure the turn-on turn-off delays: 71
Step 3 – Coupling selected inputs: 71
Step 4 – Use the AllInputs On and Off keys: 71
Specifying the Load Operating Mode 73
Configuring the Load Settings 74
Operating modes 74
Specifying the Operation Mode (EL34243A only) 78
Using the Digital Control Port 79
Bi-directional digital IO 79
Digital input 81
Fault output 81
Inhibit input 82
Fault/inhibit system protection 83
Trigger input 84
Trigger output 85
Input couple controls 86
Using the Sequencer Function (EL34143A and EL34243A only) 88
LIST mode 88
Step 1– Add/remove steps to/from the LIST 88
Step 2 – Configure the input sequence 89
Step 3 – Run the input sequence list 91
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Continuous mode 93
Step 1– Configure the sequence properties 93
Step 2 – Run the input sequence 94
Pulse mode 96
Step 1– Configure the sequence properties 96
Step 2 – Run the input sequence 97
Toggle mode 99
Step 1– Configure the sequence properties 99
Step 2 – Run the input sequence 100
Using the Data Logger Function 101
Logging data 101
Step 1 — Set the load operating mode to CC 101
Step 2 – Program the input current values 101
Step 3 – Program the sequence for the input channels 101
Step 4 – Configure the data logger traces 102
Step 5 – Configure the data logger properties 102
Step 6 – Configure and enable the DUT output accordingly 103
Step 7 – Turn on Input 1, start the sequencing and log the data 103
Step 8 – Export the data 103
Data logger view 105
Data logger marker view 106
Using the knob in data logger view 107
Data logger properties and waveform settings 108
Save the data log 112
Using the Scope Function 115
Making measurement 115
Step 1 — Set the load operating mode to CC 115
Step 2 – Program the input current values 115
Step 3 - Configure the input turn-on sequence 115
Step 4 - Configure the Scope View traces 116
Step 5 – Configure the Scope properties: 116
Step 6 – Configure and enable the DUT output accordingly 117
Step 7 – Turn on the inputs and measure the current: 117
From the remote interface: 117
Scope View 118
Scope marker view 120
Using the knob in scope view 121
Scope properties and waveform settings 122
Scope marker properties 125
Save the scope data 125
Locking/Unlocking the Front Panel 126
Capturing a Screen 126
Utilities Menu 127
Utilities Menu - Store and Recall State 127
Store Settings 128
Recall Settings 129
Power On Setting 130
Set to Defaults 130
Utilities Menu - I/O Configuration 131
LAN Settings 131
Digital IO 132
GPIB (optional) 132
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Utilities Menu - Test / Setup 133
Calibration 133
Self-Test 133
User Settings 134
Low Range 135
Help 135
Utilities Menu - Error 137
Utilities Menu - Manage Files 138
Action 138
Browse 139
File Name 139
3 Characteristics and Specifications 140
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Notices
Copyright Notice
© Keysight Technologies 2020
No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or
translation into a foreign language) without prior agreement and written consent from Keysight Technologies as
governed by United States and international copyright laws.
Manual Part Number
EL34243-90000
Edition
Edition 1, November 15, 2020
Published by
Keysight Technologies
Bayan Lepas Free Industrial Zone
11900 Bayan Lepas, Penang
Malaysia
Warranty
THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED “AS IS,” AND IS SUBJECT TO BEING CHANGED,
WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE
LAW, KEYSIGHT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH REGARD TO THIS MANUAL
AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT OR OF ANY INFORMATION CONTAINED HEREIN. SHOULD KEYSIGHT AND
THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS
DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY TERMS IN THE SEPARATE AGREEMENT
SHALL CONTROL.
Technology Licenses
The hardware and/or software described in this document are furnished under a license and may be used or copied
only in accordance with the terms of such license.
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U.S. Government Rights
The Software is “commercial computer software,” as defined by Federal Acquisition Regulation (“FAR”) 2.101.
Pursuant to
government acquires commercial computer software under the same terms by which the software is customarily
provided to the public. Accordingly, Keysight provides the Software to U.S. government customers under its
standard commercial license, which is embodied in its End User License Agreement (EULA), a copy of which can be
found at http://www.keysight.com/find/sweula. The license set forth in the EULA represents the exclusive authority
by which the U.S. government may use, modify, distribute, or disclose the Software. The EULA and the license set
forth therein, does not require or permit, among other things, that Keysight: (1) Furnish technical information
related to commercial computer software or commercial computer software documentation that is not customarily
provided to the public; or (2) Relinquish to, or otherwise provide, the government rights in excess of these rights
customarily provided to the public to use, modify, reproduce, release, perform, display, or disclose commercial
computer software or commercial computer software documentation. No additional government requirements
beyond those set forth in the EULA shall apply, except to the extent that those terms, rights, or licenses are explicitly
required from all providers of commercial computer software pursuant to the FAR and the DFARS and are set forth
specifically in writing elsewhere in the EULA. Keysight shall be under no obligation to update, revise or otherwise
modify the Software. With respect to any technical data as defined by FAR 2.101, pursuant to FAR 12.211 and
27.404.2 and DFARS 227.7102, the U.S. government acquires no greater than Limited Rights as defined in FAR
27.401 or DFAR 227.7103-5 (c), as applicable in any technical data.
FAR 12.212 and 27.405-3 and Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S.
Third Party Licenses
Portions of this software are licensed by third parties including open source terms and conditions. For more
information, please contact Keysight support, http://www.keysight.com/find/assist.
Waste Electrical and Electronic Equipment (WEEE)
This product complies with the WEEE Directive marking requirement. The affixed product label (see below) indicates
that you must not discard this electrical/electronic product in domestic household waste.
Product category: With reference to the equipment types in the WEEE directive Annex 1, this product is classified as
“Monitoring and Control instrumentation” product. Do not dispose in domestic household waste.
To return unwanted products, contact your local Keysight office, or see
about.keysight.com/en/companyinfo/environment/takeback.shtml for more information.
Declarations of Conformity
Declarations of Conformity for this product and for other Keysight products may be downloaded from the Web. Go
to https://regulations.about.keysight.com/DoC/default.htm. You can then search by product number to find the
latest Declaration of Conformity.
Keysight EL30000 Series User's Guide 7
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Safety Information
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTIONnotice
until the indicated conditions are fully understood and met.
A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.
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Safety and Regulatory Information
Safety Considerations
The following general safety precautions must be observed during allphases of operation, service, and repair of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates
safety standards of design, manufacture, and intended use of the instrument. Keysight Technologies assumes no
liability for the customer's failure to comply with these requirements.
BEFORE APPLYING POWER
– Verify that the product is set to match the available line voltage and all safety precautions are taken. Note the
instrument's external markings are described under Safety Symbols.
- Ensure the mains supply voltage fluctuation do not exceed ±10% of the nominal supply voltage.
GROUND THE INSTRUMENT
This product is a Safety Class I instrument (provided with a protective earth terminal). To minimize shock hazard, the
instrument chassis and cover must be connected to an electrical ground. The instrument must be connected to the
AC mains through a three-conductor power cable, with the third wire firmly connected to an electrical ground (safety
ground) at the power outlet. Any interruption of the protective(grounding) conductor or disconnection of the
protective earth terminal will cause a potential shock hazard that could result in personal injury.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE OR WET ENVIRONMENTS
Do not operate the device around flammable gases or fumes, vapor, or wet environments.
DO NOT OPERATE DAMAGED OR DEFECTIVE INSTRUMENTS
Instruments that appear damaged or defective should be made inoperative and secured against unintended operation
until they can be repaired by qualified service personnel.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized
modification to the instrument. Return the instrument to a Keysight Technologies Sales and Service Office for service
and repair to ensure that safety features are maintained. To contact Keysight for sales and technical support, refer to
the support links on the following Keysight website: www.keysight.com/find/assist (worldwide contact
information for repair and service).
USE THE POWER CORD PROVIDED
Use the device with the power cord provided with the shipment.
USE THE DEVICE AS SPECIFIED
If the device is used in a manner not specified by manufacturer, the device protection may be impaired.
DO NOT BLOCK VENTILATION HOLES
Do not block the rearventilation hole and keep at least 130 mm free space from the rear panel.
OBSERVE ALL DEVICE MARKINGS BEFORE CONNECTING TO DEVICE
Observe all markings on the device before connecting any wiring to the device.
TURN DEVICE OFF BEFORE CONNECTING TO INPUT TERMINALS
Turn off the device power before connecting to the input terminals.
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ENSURETHEREARMATINGCONNECTORIS FIRMLYSCREWED
Ensure the rear mating connector is firmly screwed to the rear input terminal. This connector comes together with the
instrument and is connected to the rear input terminal.
DONOT REMOVEREAR MATING CONNECTOR
- Do not remove the rear mating connector as it acts as safety cover to the rear input terminal.
- Rear input terminal connection must be performed with the presence of mating connector.
ENSURE COVER IS SECURED IN PLACE
Do not operate the device with the cover removed or loosened.
TURN DEVICE OFF ANDREMOVEALL CONNECTIONS BEFORE INSTALLING THEGPIB INTERFACE
Turn off the power and remove all connections, including the power cord, from the instrument prior installation of
the GPIB interface.
ENSURE PROPER AWG CABLE IS USED
Use a cable with the correct voltage and AWG rating based on the intended setup when operating the EL30000
Series DC electronic loads.
DO NOT TOUCH CABLES DURING OPERATION
Do not touch the cable while the instrument input is operational to prevent electric shock hazard and burn hazard.
DO NOT CONNECT FRONT AND REAR INPUT TERMINAL CONCURRENTLY
Do not connect the front and rear input terminal concurrently for the same input channel. Failing to observe the
connection requirement could potentially raise a fire hazard if the input current exceeding 60 A.
LETHAL VOLTAGES ANDCURRENTS
- Keep away from live circuits. This instrument operates up to 150 VDCand 60 ADCat its input terminals and
sense terminal.
- SHOCK HAZARD. Floating voltage must not exceed 240 VDC. The total voltage on the input terminal and the floating
voltage must not be more than 240 VDCfrom chassis ground.
- The input terminal is designed for DC application. Ensure that transient voltages do not exceed 480 VPKor
480 VDC.
- The connector screw terminals will be at hazardous potential when in operation.
- Personal injury on contact may result if these terminals are touched when equipment is in operation.
- To avoid injuries, always disconnect power, discharge circuits, and remove external voltage sources before any
installation.
- Installation procedures must be performed by a qualified and trained personnel on this equipment.
DONOTREMOVETHEINSTRUMENT COVER
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be
made only by qualified service personnel.
CLEANING
To prevent electric shock, unplug the unit before cleaning.
COIN BATTERY REPLACEMENT
- Be sure to use battery (KPN 1420-0942) for the coin battery replacement.
- Incorrect battery type and battery polarity used during the battery replacement can cause damage to the instrument.
- Refer to
by qualified service personnel.
EL30000 Service Guide
for coin battery replacement procedures. Battery replacement must be made only
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CLEAN WITH DRY CLOTH
Clean the outside of the instrument with a soft, lint-free, dry cloth. Do not use detergent, volatile liquids, or chemical
solvents.
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Safety Symbols
Symbol Description
Caution, risk of danger (refer to the manual for specific Warning or Caution information)
Caution, risk of electric shock
Protective earth (ground) terminal.
Earth ground
Frame or chassis (ground) terminal.
Standby supply. The instrument is not completely disconnected from AC mains when switch is off.
Alternating current (AC).
Plus, positive polarity.
Minus, negative polarity.
A WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly performed
or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING sign until the indicated
conditions are fully understood and met.
A CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly performed
or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond CAUTION sign
until the indicated conditions are fully understood and met.
A NOTE sign denotes important information. It calls attention to a procedure, practice, condition or the like, which is
essential to highlight.
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Regulatory Markings
Symbol Description
The RCM mark is a registered trademark of the Australian Communications and Media Authority.
The CE mark is a registered trademark of the European Community. This CE mark shows that the product
complies with all the relevant European Legal Directives.
ICES/NMB-001 indicates that this ISM device complies with the Canadian ICES-001.
Cet appareil ISM est conforme a la norme NMB-001du Canada.
ISM GRP.1 Class A indicates that this is an Industrial Scientific and Medical Group 1 Class A product.
This symbol indicates the time period during which no hazardous or toxic substance elements are expected to
leak or deteriorate during normal use. Forty years is the expected useful life of the product.
This symbol is a South Korean Class A EMC Declaration. This is a Class A instrument suitable for professional use
and in electromagnetic environment outside of the home.
The CSA mark is a registered trademark of the Canadian Standards Association.
South Korean Class A EMC declaration:
Information to the user:
This equipment has been conformity assessed for use in business environments. In a residential environment this
equipment may cause radio interference.
– This EMC statement applies to the equipment only for use in business environment.
사 용 자 안 내 문
이 기기는 업무용 환경에서 사용할 목적으로 적합성평가를 받은 기기로서 가
정용 환경에서 사용하는 경우 전파간섭의 우려가 있습니다.
– 사용자 안내문은 “업무용 방송통신기자재”에만 적용한다.
Safety and EMC Requirements
This electronic load is designed to comply with the following safety and EMC (Electromagnetic Compatibility) requirements:
- Low Voltage Directive
- EMC Directive
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Environmental Conditions
The EL30000 Series is designed for indoor use. The table below shows the general environmental requirements for
this instrument.
Environmental condition Requirement
Temperature Operating condition: 0 °C to 40 °C
Storage condition: –40 °C to 70 °C
Humidity Operating condition: Up to 85% RH at temperature up to 40 °C (non-condensing)
Storage condition: Up to 90% RH (non-condensing)
Altitude Up to 2000 m
Pollution degree 2
Installation category II (for AC input)
Mains voltage (rms) 100 VAC to 240 VAC ±10%
Mains frequency 50/60 Hz
Acoustic noise declaration Sound pressure: Lρ < 65 dB(A) at operator position, Lρ < 70 dB(A) at bystander position
Sound power: Lw < 70 dB(A)
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1 Getting Started
Product Introduction
Prepare Instrument for Use
Load Operating Modes
Programming Ranges
Installation
Remote Interface Configuration
Remote Control
Using the Built-in Help System
Firmware Update
Front Panel Menu Reference
This chapter gets you started with the EL30000 Series DC electronic
loads.
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Product Introduction
The EL30000 Series DC electronic loads are designed with superior performance in compact bench form factor.
Ideal for design/verification of consumer power supplies, batteries, battery modules, solar panels, LED drivers, as
well power converters.
The series includes single and dual inputs models:
– EL33133A: Single Input DC Electronic Load; 150 V, 40 A, 250 W
– EL34143A: Single Input DC Electronic Load; 150 V, 60 A, 350 W
– EL34243A: Dual Input DC Electronic Load; 2 x 150 V, 60 A, 300 W (total 600 W)
Features:
Clean, reliable load
– 250350 to 600 W, 0 to150 V, 0 to 60 A
– Four modes: constant voltage (CV), constant current (CC), constant power (CP), and
constant resistance (CR)
– Excellent programming/readback accuracy
– High resolution
– 2-wire or 4-wire remote sense
– Over voltage, over current, and over temperature protection
Convenient benchtop capabilities
– Dynamic transient response up to 100 kHz
– Thermal-control fan speed for lower acoustic noise
– Input parallel connections (EL34243A only)
– Front and rear input terminal
Intuitive and easy to use interfaces
– 4.3-inch LCD color display
– Color-coded channels
– Individual knobs for voltage and current input
– LAN (LXI), USB, and GPIB (optional)
Advance characterization
– Scope view
– Data logging
– Input sequencing
– Low range current measurement
– Adjustable voltage slew rate
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The model-specific features are shown below.
Feature EL33133A EL34143A EL34243A
Power input 250 W 350 W 300 W per input, total 600 W
IO interface USB USB/LAN standard,
GPIB optional
Maximum operating voltage/current 150 V/40 A 150 V/60 A 150 V/60 A
Digital IO
Scope view
Input-parallel mode
Input sequencing
Low range current measurement
Data logging
BenchVue software
P P P
P P P
P P P
P P
P P
P P
USB/LAN standard,
GPIB optional
P
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Front panel at a glance (EL33133A/EL34143A)
Item Description
1 Information-packed, high contrast 4.3-inch LCD color display; easily viewable even from sharp angles
2 Vertical and Horizontal knobs
Use Vertical knob to set the input value for input 1. These knobs are active in Meter View, Scope View, Data Logger View, and
Settings page.
3 Meter View, List Run/Stop, and Scope/Datalog keys
– [Meter View] turns on the meter view for the selected input.
– [List Run/Stop] runs or stop input sequencer list on all channels simultaneously.
– [Scope/Datalog] toggles between Scope view and Data Logger view.
4 Navigation keys.
– Navigate through the control dialog windows; press [Enter] key to select a control.
5 Numeric keypad
– Enters numeric values. Press [Enter] key to complete the entry.
– Deletes the values entered into the dialog using the back key.
6 Input On key
Turns the input On or Off; input is on when the key is lit.
7 Sense terminals
8 Input terminals
9 Power key and LED indicator
Turns on the instrument. If the LED is amber, the instrument is in standby mode with AC inlet power connected, and if it is green, the
instrument is on.
10 Softkeys
Accesses the soft front panel menu.
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Item Description
11 USB port
Allows an external USB drive to be connected to the instrument.
Front panel at a glance (EL34243A)
Item Description
1 Information-packed, high contrast 4.3-inch LCD color display; easily viewable even from sharp angles
2 Input selection keys
Selects an input to control. The lit key indicates the selected input.
Tip: When this key is selected, pressing this key again will toggle between multiple and single input view.
3 Vertical and Horizontal knobs
Set the input value for input 1 and input 2. These knobs are active in Meter View, Scope View, Data Logger View, and Settings page.
4 Meter View, List Run/Stop, and Scope/Datalog keys
– [Meter View] turns on the meter view for the selected input.
– [List Run/Stop] runs or stop input sequencer list on all channels simultaneously.
– [Scope/Datalog] toggles between Scope view and Data Logger view.
5 Navigation keys.
– Navigate through the control dialog windows; press [Enter] key to select a control.
6 Numeric keypad
– Enters numeric values. Press [Enter] key to complete the entry.
– Deletes the values entered into the dialog using the back key.
7 Input On key
Turns individual inputs On or Off; inputs are on when the key is lit.
8 Input terminals
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Item Description
9 Power key and LED indicator
Turns on the instrument. If the LED is amber, the instrument is in standby mode with AC inlet power connected, and if it is green, the
instrument is on.
10 All input on/off key
Turns all inputs On and Off according to the specified turn-on and turn-off delays.
11 Softkeys
Accesses the soft front panel menu.
12 USB port
Allows an external USB drive to be connected to the instrument.
Rear panel at a glance (EL33133A/EL34143A)
Item Description
1 AC inlet
2 GPIB port (EL34143A only – Option GPIB)
3 USB port (EL34143A only)
4 LAN port (EL34143A only)
5 Digital I/O terminal port (EL34143A only)
6 Fan ventilation hole
7 Input 1 terminal port with mating connector
8 Input 1 sense terminal port
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Rear panel at a glance (EL34243A)
Item Description
1 AC inlet
2 GPIB port (Option GPIB)
3 USB port
4 LAN port
5 Digital I/O terminal port
6 Fan ventilation hole
7 Input 1 and input 2 terminal ports with mating connectors
8 Input 1 and input 2 sense terminal ports
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Meter view
The electronic load's front panel features a high contrast 4.3-inch LCD color display.
Press [Meter View]. This key toggles between multiple (EL34243A only) and single input view.
EL33133A/EL34143A EL34243A
Item Description
1 Input identifier (EL34243A only)
When an input is selected, the background becomes highlighted.
2 Load operating mode identifier.
Displays the selected operating mode.
CV mode: Constant voltage mode
CC mode: Constant current mode
3 Input range
Displays the input range setting.
4 Remote sense status
2wire or 4wire indicates that 2-wire or 4-wire sensing measurement is in use.
5 Input status
OFF: The input is off
CV: The input is in constant voltage mode
CC: The input is in constant current mode
UR: The input is unregulated
OV: Over-voltage protection is tripped
OC: Over-current protection is tripped
OT: Over-temperature protection is tripped
6 Interface status
: The instrument is connected to USB.
: The instrument is connected to LAN.
(blinking): The instrument is under identification mode via
remote interface.
CP mode: Constant power mode
CR mode: Constant resistance mode
CP: The input is in constant power mode
CR: The input is in constant resistance mode
CP+: Positive power limit condition has disabled the input
OV-: Negative over-voltage protection is tripped
UVI: Under-voltage inhibit protection is tripped
Inh: The input is inhibited by an external INHibit signal
SH: The input terminals are shorted
: The instrument is not connected to LAN.
(blinking): The LAN connection is at fault.
7 Slew rate
Displays the rising slew and falling slew rate
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Item Description
8 Input delay
Displays the Over-protection delay and Input On/Off delay status/values.
9 Soft front panel menu
10 Input settings
Displays the present input value settings in voltage, ampere, ohms and watts. Use the numeric keypad or turn the front panel knob to
adjust these settings.
11 Input short indicator
Displays when input short is enabled.
12 Input meters
Displays the actual input voltage. current and power.
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Data logger view
Press [Scope/Data Log]. This key toggles between Data Logger view and Scope view.
Item Description
1 Data bar and time elapsed
Displays the progress of the data logger. The yellow bar indicates the visible data. Numbers to the left indicate time elapsed/total
duration.
2 Data traces
Voltage, current, or power traces. Voltage traces V1 and V2 is shown. Press Auto Scale to auto scale all traces.
3 Time/Div
Indicates the horizontal time-base setting.
4 Offset time
Indicates the time that the right gridline is offset or away from the end of the data log.
5 Grid time
Displays the time on the gridline.
6 Filename
Indicates the file to which the data is being logged.
7 Status
Indicates whether the Data Logger is logging data, done logging, or is empty.
8 Trigger Source
Indicates the trigger source for the data logger.
9 Trace controls
Identifies the voltage or current trace that will be displayed. Dashes (----) indicate that the specified trace is turned off. Select the
trace and press [Enter] to turn it on or off.
10 m1 marker
Measurement Marker 1 enabled. This can be adjusted using the Vertical knob after pressing Knob Mrk.
11 m2 marker
Measurement Marker 2 enabled. This can be adjusted using the Horizontal knob after pressing Knob Mrk.
12 Intersect point
Shows where the measurement markers intersect the waveform.
13 Measurements
Shows the calculations of the waveform data between Marker 1 and Marker 2.
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Scope view
Press [Scope/Datalog]. This key toggles between Data Logger view and Scope view.
Item Description
1 Data bar
The highlighted area shows how much of the entire measurement is actually shown on the display.
2 Scope traces
Voltage, current, or power traces. Voltage traces V1 and V2 is shown for EL34243A. Press Auto Scale to auto scale all traces.
3 Time/Div
Indicates the horizontal time-base setting. This can be adjusted using the Horizontal knob after pressing Knob Scale.
4 Offset time
Indicates the time from the trigger point indicator to the horizontal reference. Negative values indicate horizontal reference is to the
left of the trigger point. Positive values indicate the horizontal reference is to the right of the trigger point.
5 Trigger level
Identifies the trigger level through which the waveform must pass before the scope will trigger.
6 Ground
Identifies the ground reference level for the trace. The initial vertical offset of each trace is set to a different level to prevent the traces
from overlapping.
7 Scope status
Indicates whether the scope is idle, running, or waiting for a trigger.
8 Trigger source
Identifies the trigger source and trigger level. V1 indicates a voltage level on input 1 is the trigger source.
9 Trigger mode
Identifies the trigger mode setting. This can be selected by pressing Properties > Settings.
10 Trace controls
Identifies the voltage, current, or power trace that will be displayed. Dashes (----) indicate that the specified trace is turned off. Select
the trace and press [Enter] to turn it on or off.
11 m1 marker
Measurement Marker 1 enabled. This can be adjusted using the Vertical knob after pressing Knob Mrk.
12 m2 marker
Measurement Marker 2 enabled. This can be adjusted using the Horizontal knob after pressing Knob Mrk.
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Item Description
13 Intersect point
Shows where the measurement markers intersect the waveform.
14 Measurements
Shows the calculations of the waveform data between Marker 1 and Marker 2.
Dimension diagram
Setup the instrument
Place the instrument's feet on a flat, smooth horizontal surface. Connect input to the front panel or connect input
and sense leads to the rear panel, being careful not to short the leads together. Attach the power cable to the rear
panel, then plug it into main power. Connect LAN, USB, or GPIB cables as desired, and you may also secure the
instrument with a security lock cable.
Before disconnecting cables and cords from the instrument, turn the instrument off using the front-panel [Power]
key and disconnect from the supply source by unplugging the detachable power cord.
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Prepare Instrument for Use
Initial inspection
When you receive your instrument, inspect it for any obvious damage that may have occurred during shipment. If
there is damage, notify the shipping carrier and nearest Keysight Sales and Support Office immediately. Refer to
www.keysight.com/find/assist.
Until you have checked out the instrument, save the shipping carton and packing materials in case the unit has to
be returned. Check the list under Standard Shipped Items and verify that you have received these items with your
instrument. If anything is missing, please contact your nearest Keysight Sales and Support Office.
Standard shipped items
– Keysight EL33133A/EL34143A/EL34243A DC electronic load
– AC power cord
– Certificate of calibration
Shipped with the EL34143A models:
– One 10 A, 3.5 mm female 4-pin terminal I/O block connector
– One 8 A, 3.5 mm 2-pin terminal sense block connector
– One 85 A, 12 mm 2-pin mating connector
Shipped with the EL34243A model:
– One 10 A, 3.5 mm female 4-pin terminal I/O block connector
– Two 8 A, 3.5 mm 2-pin terminal sense block connector
– Two 85 A, 12 mm 2-pin mating connector
Documentation and firmware revisions
The Keysight EL30000 Series documentation listed below can be downloaded for free through our website at
www.keysight.com/find/el30000.
– Keysight EL30000 Series DC Electronic Load User's Guide. This manual.
– Keysight EL30000 Series DC Electronic Load Programming Guide
– Keysight EL30000 Series DC Electronic Load Service Guide
For the latest firmware revision and firmware update instruction, go to www.keysight.com/find/el30000.
Recommended calibration interval
Keysight Technologies recommends a one-year calibration cycle for the EL30000 Series DC electronic load.
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Load Operating Modes
The load operating modes for Keysight EL30000 Series DC electronic load are:
– Constant current (CC) mode
– Constant voltage (CV) mode
– Constant power (CP) mode
– Constant resistance (CR) mode
When programmed to a mode, the electronic load remains in that mode until the mode is changed or until a fault
condition, such as an overpower or over-temperature occurs.
CC mode
In this mode, the load unit willsink a current in accordance with the programmed value regardless of the input
voltage.
The heavy solid vertical line illustrates the locus of possible operating points as a function of the load current. A CC
(constant current) status flag indicates that the load current is at the specified setting. A voltage limit is not
programmable in CC mode. Also, if the DUT imposes a voltage that is above 110% of the rated input voltage, the
overvoltage protection will trip and the load's input willturn off.
Current may be programmed in one of three overlapping ranges, a Low, Medium and a High current range. The low
range provides better programming and measurement resolution at low current settings.
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CV mode
In this mode, the load unit willattempt to sink enough current to maintain the input voltage at its programmed
value.
The heavy solid line illustrates the locus of possible operating points as a function of the load voltage. Note that in CV
mode, a current limit can be imposed. As shown by the horizontal portion of the line, the input voltage remains
regulated at its programmed setting as long as the input current remains within the current limit setting. A CV
(constant voltage) status flag indicates that the input current is within the limit settings.
When the input current reaches the current limit, the unit is no longer in constant voltage operation and the input
voltage is no longer held constant. Instead, the load unit willnow regulate the input current at its current limit
setting. A CL (current limit) status flag is set to indicate that a current limit has been reached. If the input voltage
increases until it exceeds 110% of the rated input voltage, the overvoltage protection will trip and the load's input
will turn off
Voltage may be programmed in one of two overlapping ranges, a Low and a High range. The low range provides
better programming and measurement resolution at low voltage settings.
CP mode
In this mode, the load unit willregulate the power being drawn from the DUT according to the programmed
constant-power value.
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The load unit regulates the input power by measuring the input voltage and current and adjusting the input power
based on data streamed from the measurement ADCs.
Power may be programmed in one of three overlapping ranges, a Low, Medium and a High power range. The low
range provides better programming and measurement resolution at low power settings. The load unit have a builtin over-power protection function that will not let you exceed 110% of the power rating of the load module (the Max
Power Contour).
CR mode
In this mode, the load unit willsink current proportional to the input voltage in accordance with the programmed
resistance.
The heavy solid line illustrates the locus of possible operating points as a function of the resistance. Resistance may
be programmed in one of three overlapping ranges - a Low, Medium, and a High resistance range. The lower ranges
provide better programming and measurement resolution at lower resistance settings. The load unit automatically
selects the resistance range that best corresponds to the resistance value that you program. If the resistance value
falls in a region where ranges overlap, the load selects the range with the highest resolution for the resistance value.
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Programming Ranges
The following table shows the input ranges (voltage, current, power and resistance) and its default value that can be
programmed for each model in EL30000 Series.
Operating
Range EL33133A EL34143A EL34243A
Mode
CV High MAXimum 153 V 153 V Single/Parallel: 153 V
MINimum 0.02 V 0.015 V Single/Parallel: 0.015 V
Low MAXimum 15.3 V 15.3 V Single/Parallel: 15.3 V
MINimum 0.005 V 0.003 V Single/Parallel: 0.003 V
DEFault (*RST) 0.02 V 0.015 V Single/Parallel: 0.015 V
CC High MAXimum 40.8 A 61.2 A Single: 61.2 A
Parallel: 122.4 A
MINimum 0.01 A 0.012 A Single: 0.012 A
Parallel: 0.024 A
Medium MAXimum - 6.12 A Single: 6.12 A
Parallel: 12.24 A
MINimum - 0.002 A Single: 0.002 A
Parallel: 0.004 A
Low MAXimum 4.08 A 0.612 A Single: 0.612 A
Parallel: 1.224 A
MINimum 0.001 A 0.0002 A Single: 0.0002 A
Parallel: 0.0004 A
DEFault (*RST) 0.01 A 0.012 A 0.012 A
CP High MAXimum 255 W 357 W Single: 306 W
Parallel: 612 W
MINimum 1.5 W 2 W Single: 2 W
Parallel: 4 W
Medium MAXimum 25.5 W 35.7 W Single: 30.6 W
Parallel: 61.2 W
MINimum 0.15 W 0.3 W Single: 0.2 W
Parallel: 0.4 W
Low MAXimum 5.1 W 8.16 W Single: 7.14 W
Parallel: 14.28 W
MINimum 0.02 W 0.01 W Single: 0.01 W
Parallel: 0.02 W
DEFault (*RST) 1.5 W 2 W 2 W
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Operating
Range EL33133A EL34143A EL34243A
Mode
CR Ultra-High MAXimum - 100 kΩ Single: 100 kΩ
Parallel: 50 kΩ
MINimum - 250 Ω Single: 250 Ω
Parallel: 125 Ω
High MAXimum 4 kΩ 4000 Ω Single: 4000 Ω
Parallel: 2000 Ω
MINimum 100 Ω 100 Ω Single: 100 Ω
Parallel: 50 Ω
Medium MAXimum 1.25kΩ 1250 Ω Single: 1250 Ω
Parallel: 625 Ω
MINimum 10 Ω 10 Ω Single: 10 Ω
Parallel: 5 Ω
Low MAXimum 30 Ω 30 Ω Single: 30 Ω
Parallel: 15 Ω
MINimum 0.08 Ω 0.05 Ω Single : 0.05 Ω
Parallel: 0.025 Ω
DEFault (*RST) 4 kΩ 100 kΩ 100 kΩ
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Installation
Connecting the power cord
Connecting the inputs
Parallel connections
4-wire sense connection
Interface connections
Installing the optional GPIB interface
Rackmounting the instrument
Connecting the power cord
FIRE HAZARD
Use only the power cord that was supplied with your instrument. Using other types of power cords may cause
overheating of the power cord, resulting in fire and electric shock hazard.
SHOCK HAZARD
The power cord provides a chassis ground through a third conductor. Be certain that your power outlet is of
the three-conductor type with the correct pin connected to earth ground.
Connect the power cord to the AC inlet connector on the rear of the unit. If the wrong power cord was shipped with
your unit, contact your nearest Keysight Sales and Support Office.
Removing the power cord will disconnect AC input power to the unit.
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Connecting the inputs
SHOCK HAZARD
The input terminal is designed for DC application. Ensure that transient voltages do not exceed 480 VPKor
480 VDC.
SHOCK HAZARD
Floating voltage must not exceed 240 VDC. The total voltage on the input terminal and the floating voltage
must not be more than 240 VDCfrom chassis ground.
DO NOT CONNECT FRONT AND REAR INPUT TERMINAL CONCURRENTLY
Do not connect the front and rear input terminal concurrently for the same input channel. When the front
input terminal is in used, the rearinput terminal must be left unused. Failing to observe the connection
requirement could potentially raise a fire hazard if the input current exceeding 60 A.
DONOTREMOVETHEMATINGCONNECTOR
Do not remove the rear mating connector as it acts as safety cover to the rear input terminal.
All DUTs should either be connected to the front panel binding post or rear panel input.
Binding posts
SHOCK HAZARD
Turn off AC power before connecting wires to the front panel. All wires and straps must be properly connected
with the binding posts securely tightened.
SHOCK HAZARD
To prevent accidental contact with hazardous voltages, do not extend the wire beyond the contact area inside
the input connector.
The binding posts accept wires sizes up to AWG 6 in location (A).
Wire size AWG 6 or 8 is the recommended wire. If you are connecting more than one wire on each binding post,
twist the wires to ensure a good contact and securely fasten all wires by hand-tightening the binding posts. If you
are using a slotted screwdriver, tighten the binding post to 8 in-lb (90 N-cm) for a secure connection.
Maximum current rating:
(A) = 60 A
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Rear inputs connections
SHOCK HAZARD
Turn off AC mains before connecting wires to the rear panel. All wires and straps must be properly connected
with the terminal block screws securely tightened.
SHOCK HAZARD
Floating voltage must not exceed 240 VDC. The total voltage on the input terminal and the floating voltage
must not be more than 240 VDCfrom chassis ground.
DONOTREMOVE THEMATINGCONNECTOR
Rear input terminal connection must be performed with the presence of mating connector.
The mating connector accepts wires sizes from AWG 14 to AWG 6. The mating connector is 60 A rated for the
EL34143A and EL34243A. Wire sizes smaller than AWG 14 are not recommended. Connect the DUT wires to the +
and - terminals. Connect the sense wires to the +s and -s terminals.
Securely fasten all wires by tightening the screw terminals.
Part number information for the connector kit is provided under Standard Shipped Items.
Wire sizing
FIRE HAZARD
Select a wire size large enough to carry short-circuit current without overheating (refer to the following table).
To satisfy safety requirements, load wires must be heavy enough not to overheat while carrying the short-circuit output current of the DUT connected to electronic load.
AWG Ampacity
(A)
14 25 0.0103
12 30 0.0065
10 40 0.0041
8 60 0.0025
6 80 0.0016
4 105 0.0010
2 140 0.00064
1
Resistance
2
(Ω/m)
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AWG Ampacity
(A)
1
Resistance
(Ω/m)
2
1/0 195 0.00040
2/0 225 0.00032
3/0 260 0.00025
4/0 300 0.00020
Notes:
1. Ampacity is based on 30 °C ambient temperature with conductor rated at 60 °C. For ambient temperature other
than 30 °C, multiply the above ampacities by the following constants:
Temperature (°C) Constant
21 - 25 1.08
26 - 30 1.00
31 - 35 0.91
36 - 40 0.82
41 - 45 0.71
46- 50 0.58
51 - 55 0.41
2. Resistance is nominal at 75 °C wire temperature.
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Parallel connections (EL34243A only)
Equipment Damage
Only connect inputs that have identical voltage and current ratings in parallel. Keysight EL30000 Series
electronic loads can be paralleled, but ONLY when operated in CC, CR and CP mode. CV mode is not allowed.
SHOCK HAZARD
Floating voltage must not exceed 240 VDC. The total voltage on the input terminal and the floating voltage must
not be more than 240 VDCfrom chassis ground.
Do not perform series connection on the input terminal.
Connecting inputs in parallel provides a greater power dissipation than that which can be achieved from a single
input.
Each input willdissipate the power it has been programmed for. For example, if two inputs are connected in parallel
(with input 1 programmed for 30 A), input 1 and input 2 will draw 15 A respectively.
The following figures show how to connect two inputs when in Input-Parallel mode.
Front panel
Rear panel
The figure on the left illustrates 2-wire sensing. If voltage drop in the load leads is a concern, the figure on the right
shows how to connect the sense leads directly at the DUT.
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4-wire sense connection
SHOCK HAZARD
Turn off AC mains before making rear panel connections. All wires and straps must be properly connected with
the terminal block screws securely tightened.
SHOCK HAZARD
Floating voltage must not exceed 240 VDC. The total voltage on the input terminal and the floating voltage
must not be more than 240 VDCfrom chassis ground.
The electronic load includes built-in relays that connect or disconnect the ± sense terminals from their
corresponding ± input terminals. As shipped, the sense terminals are internallyconnected to the input terminals.
This is referred to as 2-wire, or local sensing.
4-wire, or remote sensing improves the voltage regulation at the load by monitoring the voltage at the DUT rather
than at the load input terminals. This automatically compensates for the voltage drop in the load leads, which is
especially useful for CVoperation with load impedance that vary or have significant lead resistance. Remote voltage
sensing also provides greater accuracy when using voltage readback in all operating modes. Because remote
sensing is independent of other load functions, it can be used regardless of how the instrument is programmed.
Remote sensing has no effect during CC operation.
The following figures illustrate DUT connections using 2-wire sensing and 4-wire sensing.
Connect the DUT to the input terminals using separate connecting wires. Keep the wire-pair as short as possible
and twist or bundle it to reduce lead inductance and noise pickup. Keep the load leads under 14.7 meters (50 feet)
per lead because of inductance effects.
Connect the sense leads as close to the DUT as possible. Do NOT bundle the sense wire-pair together with the load
leads; keep the load wires and sense wires separate. The sense leads carry only a few milliamperes of current and can
be a lighter gauge than the load leads. However, any voltage drop in the sense leads can degrade the voltage
regulation of the instrument.
After turning the unit on, activate 4-wire remote voltage sensing by pressing Source Settings > Sense 4w. Refer to
Specifying 2-Wire or 4-Wire Sense.
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Open sense leads
The sense leads are part of the input's feedback path. Connect them in such a way so that they do not inadvertently
become open circuited. The electronic load includes protection resistors that reduce the effect of open sense leads
during 4-wire-sensing. If the sense leads open during operation, the electronic load returns to the local sensing
mode, with the voltage at the input terminals approximately 5% higher than the programmed value.
Over-voltage protection considerations
You must take into account any voltage drop in the load leads when setting the over-voltage trip point. This is
because the OVP circuit senses at the input terminals and not at the sense terminals. Due to the voltage drop in the
load leads, the voltage sensed by the OVP circuit could be lower than the voltage being regulated at the DUT.
Output noise considerations
Any noise picked up on the sense leads will appear at the input terminals and may adversely affect CV load
regulation. Twist the sense leads or use a ribbon cable to minimize the pickup of external noise. In extremely noisy
environments it may be necessary to shield the sense leads. Ground the shield at the electronic load end only; do
not use the shield as one of the sensing conductors.
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Interface connections
GPIB connections
USB connections
LAN connections - site and private
Digital port connections
This section describes how to connect to the various communication interfaces on your electronic load. For further
information about configuring the remote interfaces, refer to Remote Interface Configuration.
If you have not already done so, install the Keysight IO Libraries Suite, which can be found at www.key-
sight.com/find/iolib. For detailed information about interface connections, refer to the Keysight Tech-
nologies USB/LAN/GPIB Interfaces Connectivity Guide included with the Keysight IO Libraries Suite.
GPIB connections (optional)
The following figure illustrates a typical GPIB interface system.
1. If you do not have a GPIB interface card installed on your computer, turn off your computer and install the GPIB
card.
2. Connect your instrument to the GPIB interface card using a GPIB interface cable.
3. Use the Connection Expert utility of the Keysight IO Libraries Suite to configure the GPIB card’s parameters.
4. The electronic load is shipped with its GPIB address set to 5. Use the front panel menu if you need to change the
GPIB address.
5. You can now use Interactive IO within the Connection Expert to communicate with your instrument, or you can
program your instrument using the various programming environments.
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USB connections
The following figure illustrates a typical USB interface system.
1. Connect your instrument to the USB port on your computer using a USB cable.
2. With the Connection Expert utility of the Keysight IO Libraries Suite running, the computer will automatically
recognize the instrument. This may take several seconds. When the instrument is recognized, your computer will
displaythe VISA alias, IDN string, and VISA address. This information is located in the USB folder. You can also view
the instrument’s VISA address from the front panel menu.
3. You can now use Interactive IO within the Connection Expert to communicate with your instrument, or you can
program your instrument using the various programming environments.
The USB cable is not recommended to be longer than 3 meters.
LAN connections - site and private
A site LAN is a local area network in which LAN-enabled instruments and computers are connected to the network
through routers, hubs, and/or switches. They are typicallylarge, centrally-managed networks with services such as
DHCP and DNS servers. The following figure illustrates a typical site LAN system.
1. Connect the instrument to the site LAN or to your computer using a LAN cable. The as-shipped instrument LAN
settings are configured to automatically obtain an IP address from the network using a DHCP server (DHCP is ON by
default). The DHCP server will register the instrument’s hostname with the dynamic DNS server. The hostname as
well as the IP address can then be used to communicate with the instrument. The front panel LAN indicator will
come on when the LAN port has been configured.
If you need to manually configure any instrument LAN settings, refer to Remote Interface Configuration
for information about configuring the LAN settings from the front panel of the instrument.
2. Use the Connection Expert utility of the Keysight IO Libraries Suite to add the electronic load and verify a
connection. To add the instrument, you can request the Connection Expert to discover the instrument. If the
instrument cannot be found, add the instrument using its hostname or IP address.
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If this does not work, refer to “Troubleshooting Guidelines” in the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide included with the Keysight IO Libraries Suite.
3. You can now use Interactive IO within the Connection Expert to communicate with your instrument, or you can
program your instrument using the various programming environments. You can also use the Web browser on your
computer to communicate with the instrument as described under Remote Control.
A private LAN is a network in which LAN-enabled instruments and computers are directly connected, and not
connected to a site LAN. They are typicallysmall, with no centrally-managed resources. The following figure
illustrates a typical private LAN system.
1. Connect the instrument to the computer using a LAN crossover cable. Alternatively, connect the computer and
the instrument to a standalone hub or switch using regular LAN cables.
Make sure your computer is configured to obtain its address from DHCP and that NetBIOS over TCP/IP is
enabled. Note that if the computer had been connected to a site LAN, it may still retain previous network settings from the site LAN. Wait one minute after disconnecting it from the site LAN before connecting it to the
private LAN. This allows Windows to sense that it is on a different network and restart the network configuration.
2. The factory-shipped instrument LAN settings are configured to automaticallyobtain an IP address from a site
network using a DHCP server. You can leave these settings as they are. Most Keysight products and most
computers will automatically choose an IP address using auto-IP if a DHCP server is not present. Each assigns itself
an IP address from the block 169.254.nnn. Note that this may take up to one minute. The front panel LAN indicator
will come on when the LAN port has been configured.
Turning off DHCP reduces the time required to fully configure a network connection when the electronic load
is turned on. To manually configure the instrument LAN settings, refer to Remote Interface Configuration
for information about configuring the LAN settings from the front panel of the instrument.
3. Use the Connection Expert utility of the Keysight IO Libraries Suite to add the electronic load and verify a
connection. To add the instrument, you can request the Connection Expert to discover the instrument. If the
instrument cannot be found, add the instrument using its hostname or IP address.
If this does not work, refer to “Troubleshooting Guidelines” in the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide included with the Keysight IO Libraries Suite.
4. You can now use Interactive IO within the Connection Expert to communicate with your instrument, or you can
program your instrument using the various programming environments. You can also use the Web browser on your
computer to communicate with the instrument as described under Remote Control.
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Digital port connections
A 4-pin connector is provided on each instrument to access the three digital control port functions. The digital
control connector accepts wire sizes from AWG 16 to AWG 22.
It is good engineering practice to twist and shield all signal wires to and from the digital connectors. If shielded wire is used, connect only one end of the shield to the chassis ground to prevent ground loops.
The wire connection to the digital port is not recommended to be longer than 3 meters.
Pin functions
The following table describes the possible pin configuration for the digital port functions. For a complete description
of the electrical characteristics of the digital I/O port, refer to the product data sheet.
Pin function Availableconfigurable pins
Digital I/O and Digital In Pins 1 through 3
External Trigger In/Out Pins 1 through 3
Fault Out Pin 1 and Pin 2
Inhibit In Pin 3
Input Coupling Pins 1 through 3
Common Pin 4
In addition to the configurable pin functions, the active signal polarity for each pin is also configurable. When
Positive polarity is selected, a logical true signal is a voltage high at the pin. When Negative polarity is selected, a
logical true signal is a voltage low at the pin.
For more information on configuring the digital port functions, refer to Using the Digital Control Port.
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Installing the optional GPIB interface (EL34143A and EL34243A only)
TURN OFF POWER AND REMOVE ALL CONNECTIONS PRIOR TO INSTALLATION
Turn off the power and remove all connections, including the power cord, from the instrument prior installation of the GPIB interface.
RETAIN GPIB COVER PLATE
After installing the GPIB option, retain the cover plate for use in the event that you ever remove the GPIB
option. The instrument should never be connected to AC mains or input terminal when the rear-panel opening
is not securely covered with either GPIB module or the cover plate.
The following tools are required.
– Torx screwdriver
Make sure you turn the electronic load upside down before proceeding.
Use a Torx screwdriver to remove the M3 screws
from the GPIB cover plate. Retain the screws for
use later in this procedure.
Then, remove the cover plate.
Attach the cable to the connector located in the
previous step.
Locate the connector, just inside the unit, to connect
the cable that is attached to the GPIB module.
Put the module into the unit. Use the screws that
was removed earlier to secure the GPIB plate in
place.
This concludes the GPIB installation procedure.
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Rack mounting the instrument
DO NOT BLOCK VENTILATION HOLES
Do not block the rearventilation hole and keep at least 130 mm free space from the rear panel.
To prevent overheating, do not block airflow to or from the instrument. Allow enough clearance at the rear,
sides, and bottom of the instrument to permit adequate internal air flow.
Use the Rack Mount kit as stated below to rack mount the instrument. Installation instructions are provided
with the rack mount kit.
The electronic load can be mounted in a standard 19-inch rack cabinet. They are designed to fit in three rack-units
(3U) of space.
Remove the feet before rack mounting the unit. Do not block the air intake and exhausts at the sides and rear of the
unit.
Rack mounting a single instrument
To rack mount a single instrument, order adapter kit (1CM116A).
Rack mounting instruments side-by-side
To rack mount two instruments side-by-side, order lock-link kit (5061-8769). Be sure to use the support rails in the
rack cabinet.
Rackmount kit without handles (1CM104A)
Rackmount kit with handles (1CP108A)
Front handle kit (1CN107A)
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Remote Interface Configuration
The instrument supports remote interface communication over three interfaces: USB, GPIB, and LAN.
– USB Interface: Use the rear-panel USB port to communicate with your PC.
– GPIB Interface: Set the instrument's GPIB address and connect to your PC using a GPIB cable.
– LAN Interface: By default, DHCP is on, which may enable communication over LAN. The acronym DHCP stands
for Dynamic Host Configuration Protocol, a protocol for assigning dynamic IP addresses to networked devices.
With dynamic addressing, a device can have a different IP address every time it connects to the network.
Keysight IOLibraries Suite
Ensure that the Keysight IO Libraries Suite is installed before you proceed for the remote interface configuration.
Keysight IOLibraries Suite is a collection of free instrument control software that automaticallydiscovers
instruments and allows you to control instruments over LAN, USB, GPIB, RS-232, and other interfaces. For more
information, or to download IO Libraries, go to www.keysight.com/find/iosuite.
GPIB configuration
There are no SCPI commands to configure the GPIB parameter. All GPIB configuration must be done from the
front panel.
Each device on the GPIB (IEEE-488) interface must have a unique whole number address between 0 and 30. The
instrument ships with a default address of 5.
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
– Your computer’s GPIB interface card address must not conflict with any instrument on the interface bus.
1. Press Utilities> I/O Config > GPIB to access the GPIB window.
2. From this window, you can set the GPIB address using the numeric keys and press [Enter].
3. Press Back to exit.
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LAN configuration
The following sections describe the primary front panel LAN configuration functions on the front-panel menu.
There are no SCPI commands to configure the LAN parameters. All LAN configuration must be done from the
front panel.
After changing the LAN settings, you must save the changes. Press Back once you have completed the
changes. You will be prompted to press Yes to save the LAN setting or No to exit without saving. Press Yes
cycles power to the instrument and activates the settings. LAN settings are nonvolatile, they will not be
changed by power cycling or *RST. If you do not want to save your changes, press No to cancel all changes.
When shipped, DHCP is on, which may enable communication over LAN. The acronym DHCP stands for Dynamic
Host Configuration Protocol, a protocol for assigning dynamic IP addresses to devices on a network. With dynamic
addressing, a device can have a different IP address every time it connects to the network.
Some LAN settings require you to cycle instrument power to activate them. The instrument brieflydisplays a
message when this is the case, so watch the screen closely as you change LAN settings.
Viewing the LAN status
Press Utilities> I/O Config > LAN Status to view the LAN status.
The LAN status may be different from the front panel configuration menu settings - depending on the configuration
of the network. If the settings are different, it is because the network has automaticallyassigned its own settings.
Restarting the LAN
Press Utilities > I/O Config > LAN Status > LAN Restart restarts the networking using ALL current LAN settings.
LAN restart does not clear the Web interface password.
Resetting the LAN
Press Utilities > I/O Config > LAN Settings > Set to Default resets the LAN settings to their factory default values.
All default LAN settings are listed under Non-volatile Settings in Programming Guide.
Press Utilities > I/O Config > LAN Status > LAN Reset resets the LAN using its current settings and enables DHCP
and DNS. The LANReset softkey also clears any user-defined Web Interface password.
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Modifying the LAN settings
As shipped from the factory, the instrument pre-configured settings should work in most LAN environments. Refer
to Non-Volatile Settings in the Programming Guide for information on the factory-shipped LAN settings.
Press Utilities> I/O Config > LAN Settings to access the LAN Settings window. From this menu, you can manually
configure the LAN settings.
DHCP
DHCP (Dynamic Host Configuration Protocol) can automatically assign a dynamic IP address to a LAN device. This is
typically the easiest way to configure the instrument for LAN.
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
1. Press Utilities > I/O Config > LAN Settings > DHCP On to use DHCP to automatically assign an IP address.
2. Press Back. You will be prompted by the below message.
3. Press Yes to save the setting.
4. Press No to cancel all the changes and exit without saving.
To manuallyset an IP address, Subnet Mask, or Default Gateway, press DHCP Off. Then, change the IP setup as
described below.
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IP Address
You can enter a static IP address for the instrument as a four-byte integer expressed in dot notation. Each byte is a
decimal value, with no leading zeros (for example, 192.168.2.20).
– If DHCP is on, it attempts to assign an IP address to the instrument. If it fails, Auto-IP attempts to assign an IP
address to the instrument.
– Contact your LAN administrator for details.
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
1. Press Utilities > I/O Config > LAN Settings > DHCP Off.
2. Select IP Address field using the navigation keys. Set the desired IP address and press Back.
3. Press Yes to save the setting.
4. Press No to cancel all the changes and exit without saving.
Subnet Mask
Subnetting allows the LAN administrator to subdivide a network to simplify administration and minimize network
traffic. The subnet mask indicates the portion of the host address used to indicate the subnet.
– Contact your LAN administrator for details.
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
1. Press Utilities > I/O Config > LAN Settings > DHCP Off.
2. Select Subnet Mask field using the navigation keys. Set the desired subnet mask address and press Back.
(Example: 255.255.0.0)
3. Press Yes to save the setting.
4. Press No to cancel all the changes and exit without saving.
Gateway
A gateway is a network device that connects networks. The default gateway setting is the IP address of such a
device.
– You need not set a gateway address if using DHCP.
– Contact your LAN administrator for details.
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
1. Press Utilities > I/O Config > LAN Settings > DHCP Off.
2. Select Gateway field using the navigation keys. Set the appropriate gateway address and press Back.
3. Press Yes to save the setting.
4. Press No to cancel all the changes and exit without saving.
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DNS
DNS (Domain Name Service) is an Internet service that translates domain names into IP addresses. The DNS server
address is the IP address of a server that performs this service.
– Normally, DHCP discovers DNS address information; you only need to change this if DHCP is unused or not
functional. Contact your LAN administrator for details.
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
1. Press Utilities > I/O Config > LAN Settings > AutoDNS On to configure the addressing of the instrument in
DNS server automatically.
2. Press Utilities > I/O Config > LAN Settings > AutoDNS Off to configure the addressing of the instrument
manually.
3.
Select DNS(1) Addr and DNS(2) Addr using the navigation keys. These fields only appear when AutoDNS is set to
Off.
4. Set the desired primary and secondary address and press Back.
5.
Select mDNS Service field using the navigation keys.
6. Press Yes to save the setting.
7. Press No to cancel all the changes and exit without saving.
DNS Hostname
A hostname is the host portion of the domain name, which is translated into an IP address.
Each load is shipped with a default hostname with the format: Keysight-modelnumber-serialnumber, where
modelnumber is the electronic load’s 8-character model number (e.g. EL34243A), and serialnumber is the last five
characters of the 10-character load serialnumber located on the labelon the top of the unit (e.g. 45678 if the serial
number is MY12345678).
– The instrument receives a unique hostname at the factory, but you may change it. The hostname must be
unique on the LAN.
– The name must start with letter; other characters can be an upper- or lower-case letters, numeric digits, or
dashes ("-").
– This setting is non-volatile; it willnot be changed by power cycling or *RST or SYSTem:PRESet.
1. Press Utilities > I/O Config > LAN Settings.
2.
Select DNS Hostname field using the navigation keys. Press and enter the hostname with the keyboard
provided. Press Back.
3. Press Yes to save the setting.
4. Press No to cancel all the changes and exit without saving.
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mDNS Service
The mDNS service name is registered with the selected naming service.
Each electronic load is shipped with a default service name with the format: Keysight-modelnumberserialnumber,
where modelnumber is the load’s 8-character model number (e.g. EL34243A), and serialnumber is the last five
characters of the 10-character electronic load serialnumber located on the labelon the top of the unit (e.g. 45678
if the serial number is MY12345678).
– The instrument receives a unique mDNS service name at the factory, but you may change it. The mDNS service
name must be unique on the LAN.
– The name must start with letter; other characters can be an upper- or lower-case letters, numeric digits, or
dashes ("-").
1. Press Utilities > I/O Config > LAN Settings > mDNS Off to configures the service name registered with the
selected naming service automatically.
2. Press Utilities > I/O Config > LAN Settings > mDNS On to configure the service name of the instrument
manually.
3.
Select mDNS Service field using the navigation keys.
4. Press mDNS Srv and enter the service name with the keyboard provided.
5. Press Back to exit.
Using sockets
Electronic loads allow any combination of up to two simultaneous data socket, control socket, and telnet connections to be made.
Keysight instruments have standardized on using port 5025 for SCPI socket services. A data socket on this port can
be used to send and receive ASCII/SCPI commands, queries, and query responses. All commands must be
terminated with a newline for the message to be parsed. All query responses will also be terminated with a newline.
The socket programming interface also allows a control socket connection. The control socket can be used by a
client to send device clear and to receive service requests. Unlike the data socket, which uses a fixed port number,
the port number for a control socket varies and must be obtained by sending the following SCPI query to the data
socket: SYSTem:COMMunicate:TCPip:CONTrol?
After the port number is obtained, a control socket connection can be opened. As with the data socket, all
commands to the control socket must be terminated with a newline, and all query responses returned on the
control socket will be terminated with a newline.
To send a device clear, send the string "DCL" to the control socket. When the power system has finished performing
the device clear it echoes the string "DCL" back to the control socket.
Service requests are enabled for control sockets using the Service Request Enable register. Once service requests
have been enabled, the client program listens on the control connection. When the SRQ value is true, the
instrument willsend the string "SRQ +nn" to the client. The "nn" is the status byte value, which the client can use to
determine the source of the service request.
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More about IP addresses and dot notation
Dot-notation addresses ("nnn.nnn.nnn.nnn" where "nnn" is a byte value from 0 to 255) must be expressed with
care, as most PC web software interprets byte values with leading zeros as octal (base 8) numbers. For example,
"192.168.020.011" is equivalent to decimal "192.168.16.9" because ".020" is 16 expressed in octal, and ".011"
(octal) is "9" (base 10). To avoid confusion, use only decimal values from 0 to 255, with no leading zeros.
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Remote Control
You can control the instrument via SCPI with Keysight IO Libraries or via a simulated front panel with the
instrument's Web interface.
Web interface
You can monitor and control the instrument from a Web browser by using the instrument's Web interface. To
connect, simply enter the instrument's IP address or hostname in your browser's address bar and press Enter.
If you see an error indicating 400: Bad Request, that is related to an issue with "cookies" in your Web browser.
To avoid this issue, either start the Web interface by using the IPaddress (not hostname) in the address bar),
or clear cookies from your browser immediately before starting the Web interface.
Check the checkbox below the picture of the instrument to enable an indicator on the instrument's front panel. This
is helpful if you have severalEL30000 Series instruments and you wish to identify the one to which you are
connected.
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The Configure LANtab on the top allows you to change the instrument's LAN parameters; exercise caution when
doing so, as you may interrupt your ability to communicate with the instrument.
When you click the Control Instrument tab, the instrument willask you for a password (default is keysight), and
then it will open a new page, shown below.
This interface allows you to use the instrument just as you would from the front panel. Note the curved arrow keys
that allow you to "rotate" the knob. You can press the arrow keys to rotate the knob clockwise and counterclockwise, just as you would press any of the other keys on the front panel.
READ WARNING
Be sure to read and understand the warning at the top of the Control Instrument page.
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Technical connection details
In most cases, you can easily connect to the instrument with the IO Libraries Suite or Web interface. In certain
circumstances, it may be helpful to know the following information.
Interface Details
VXI-11 LAN VISA String: TCPIP0::<IP Address>::inst0::INSTR
Example: TCPIP0::192.168.10.2::inst0::INSTR
Web UI Port number 80, URL http://<IP address>/
USB USB0::0x2A8D::<Prod ID>::<Serial Number>::0::INSTR
Example: USB0::0x2A8D::0x0902::MY55160003::0::INSTR
The vendor ID: 0x2A8D, the product ID is 0x0902, and the instrument serial number is MY55160003.
The product ID varies by model: 0x3702 (EL33133A), 0x3802 (EL34143A), and 0x3902 (EL34243A).
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Use the Built-in Help System
The built-in help system provides context-sensitive help on any front panel key or menu softkey. A list of help topics
is also available to help you learn about the instrument.
View the help information for the front panel key
Note that there is no help information available for [Meter View] and Lock|Unlock keys.
Press and hold any softkey or key, such as [All On/Off]. If the message contains more information than will fit on the
display, press the down arrow softkey to scroll down.
Press Back to exit.
View the list of help topics
Press Utilities > Test / Setup > Help to view the list of help topics. Press the arrow softkeys or use the front panel
arrow keys to highlight the desired topic. Then press Select.
In this case, the following help topic appears:
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View the instrument model and serial number
Press About to view the instrument's model number, description and serial number.
Press Back to exit.
LOCAL LANGUAGEHELP
All front-panel keys' help, and help topics are available in English, French, German, Japanese, Korean, Chinese
and Russian. To select the local language, press
Help Lang.
lated.
. Then select the desired language. The menu softkey labels and status line messages are not trans-
Utilities>Test / Setup>User Settings>Display Options
>
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Firmware Update
Do not turn off the instrument during the update.
1. Press Utilities > Test / Setup > Help > About to determine what instrument firmware version is currently
installed.
2.
Go to www.keysight.com/find/el30000 to find the latest firmware version. If this matches the version installed
on your instrument, there is no need to continue with this procedure. Otherwise, download the firmware
update utility and a ZIP file of the firmware. Detailed firmware update instructions are located on the download
page.
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Front Panel Menu Reference
This is an overview of the front-panel menus. Press the softkeys to access the front panel menus.
Menu heading Description
Mode>
CC Constant current (CC) mode.
In this mode, the load will sink a current in accordance with the programmed value regardless of the
input voltage.
CV Constant voltage (CV) mode.
In this mode, the load will attempt to sink enough current to maintain the input voltage at its programmed value.
CR Constant resistance (CR) mode.
In this mode, the load will sink current proportional to the input voltage in accordance with the programmed resistance.
CP Constant power (CP) mode.
In this mode, the load will regulate the power being drawn from the DUT according to the programmed constant-power value.
Load Settings >
Mode > Configures the operating mode to CC, CV, CR, or CP.
Sense Configures the load input sense to 2-wire or 4-wire.
Protection > Configures the protection setting for the load input.
Range > Configures the measurement range for load input.
Short Enable or disable the input short.
Input Settings>
On/Off Coupling > Enables or disables the input coupling or synchronization between multiple input channels.
Output Inhibit > Configures the inhibit input mode and Digital IO Pin 3.
Operation Mode > Configures the input capability when two independent inputs are being used. (EL34243A only)
Sequencer >
Sequencer > Configures the sequencer type: LIST, Continuous, Pulse, and Toggle.
Utilities >
Store / Recall > Saves and recalls instrument states.
I/O Config > Displays and configures the I/O parameters for remote operations over the USB, LAN, GPIB, or
digital IO interface.
Test/Setup > Accesses the self-test, calibration, and help function as well as configures the user preferences, and
sets date and time.
Error > Displays the instrument's error queue. Errors will be cleared after viewing or instrument reset.
Manage Files > Creates, copies, deletes, and renames files and folders on the USB drive attached to the front panel.
Also allows you to capture the current screen to either a bitmap (*.bmp) or portable network graphics (*.png) file.
Lock | Unlock Locks and unlocks the display.
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2 General Operating Information
Turning the Unit On
Controlling the Inputs
Using the Protection Function
Specifying 2-Wire or 4-Wire Sense
Configuring the Input Turn On Turn Off Sequence
Specifying the Load Operating Mode
Configuring the Load Settings
Configuring the Operation Mode
Using the Digital Control Port
Using the Sequencer Function
Using the Data Logger Function
Using the Scope Function
Locking/Unlocking the Front Panel
Capturing a Screen
Utilities Menu
This chapter describes the general operating information of the EL30000 Series.
For the characteristics and specifications of the EL30000 Series DC
electronic loads, refer to the datasheet at
https://www.keysight.com/my/en/assets/3120-1430/datasheets/EL30000-Series.pdf.
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Turning the Unit On
After you have connected the power cord, press the [Power] key to turn the unit on. The front panel display lights
up after a few seconds. When the front panel meter view appears, use the knob or the numeric entry keys to enter
the input values.
EL33133A/EL34143A
For EL34243A, Input 1 is selected by default:
EL33133A/EL34143A: Press the [On] key to enable the input.
EL34243A: Press one of the two [On] keys to enable an individual input or press the [All On/Off] key to enable both
inputs simultaneously.
A power-on self-test occurs automatically when you turn the unit on. This assures you that the instrument is
operational. If self-test fails, or if other operating problems occur with your instrument, the front panel error
indicator (!Err) appears at the upper top of the display.
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Using the front panel knobs
There are two knobs on the front panel: Vertical and Horizontal.
EL33133A/EL34143A EL34243A
These knobs are active in Meter View, Scope View, Data Logger View, as well as in Settings page.
– In Meter View, these knobs are channel-specific. Adjusting the Vertical knob will adjust the values for Channel 1,
while Horizontal knob for Channel 2. Turn the knob to set the input and push the knob to zero the value in a specified field.
– In Scope and Data Logger view, these knobs can be programmed according to the different operating function
for value adjustment.
– For more information on the knob usage in data logger view, see Using knob in data logger view.
– For more information on the knob usage in scope view, see Using knob in scope view.
– In Settings page (except in Scope and Data Logger view), these knobs are channel-specific and can be used to
change values or toggle between parameter. Adjusting the Vertical knob will adjust the values for Channel 1,
while Horizontal knob for Channel 2.
View the error log
Press Utilities > Error to display the error log. If there are more than 10 errors on the display, press Next to scroll to
the next page.
Press Back or [Meter View] to return to the meter-view display.
– Errors are stored in the order they are received. The error at the end of the list is the most recent error.
– If there are more than 20 errors in the queue, the last error stored is replaced with -350,"Queue overflow". No
more errors are stored until you remove errors from the queue. If there are no errors, the instrument responds
with +0,"No error".
– Except for self-test errors, errors are cleared when exiting the Error Log menu or when cycling power.
If you suspect that there is a problem with the electronic load, refer to the "Troubleshooting" section in the
Service Guide.
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Controlling the Inputs
Step 1 - Select an input (EL34243A only)
Press one of the input selection keys to select an input to control. The lit key identifies the selected input. All
subsequent input-specific front panel commands are sent to the selected input.
Step 2 - Set the load operating mode
Press Mode to set the operating mode to constant current (CC), constant voltage (CV), constant resistance (CR), or
constant power (CP) mode.
Refer to the Load Operating Modes for more information.
Step 3 - Set the input voltage, current, resistance, or power
Turn the knob to set the input. The input values changes when they are turned.
This knob is active in Meter View, Scope View and Data Logger View.
EL33133A/EL34143A EL34243A
You can also enter the voltage, current, resistance, or power values directly in the numeric entry fields (the Set fields)
in the meter-view display. Use the navigation keys to select the field; use the numeric entry keys to enter the value.
The value becomes active when you press [Enter].
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Lastly, you can press the Load Settings key to access the Load Settings window. Use the navigation keys to
highlight the voltage, current, resistance, or power fields. Then enter the input values with the numeric keys. You
can also use the knob to adjust the values in the value fields for Channel 1/Channel 2 input accordingly.
Press [Enter] to enter the value. Press Back to return to the meter-view display.
Refer to Programming Ranges for the load input range and its default value.
Step 4 - Enable the input
Press the color-coded [On] key to enable an individual load input. When an input is on, the [On] key for that input is
lit. When an input is off, the [On] key is not lit.
EL34243A only: The [All On/Off] key turns all inputs on or off simultaneously.
The state of a disabled input (input off) is a condition of zero input voltage and zero source current.
Step 5 - View the input voltage and current
Press [Meter View] to view the input voltage and current. When an input is enabled, the front panel meters
continuously measure and display the voltage and current either input or sense terminal.
No matter which operating mode you are operating in, the front panel meter view returns the voltage and current
measurement from either input or sense terminal. Power measurements are displayed along with voltage and
current in single-channel view.
The following meter view applies to CC mode. CV, CP, and CR mode views are similar. All measurements have an
over-range capability of 10% above the maximum range limit. If the measurement exceeds this limit, “Data Out of
Range” error will occur
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From the remote interface:
A channel parameter is required with each SCPI command to select an input. For example, (@1) selects input 1 and
(@1,2) selects input 1 and 2. The input list must be preceded with an @ symbol and be enclosed in parentheses ().
To set input 1 load operating mode to CC:
FUNCCURR, (@1)
To set only input 1 to 1 A:
CURR 1, (@1)
To enable only input 1:
INP ON, (@1)
To enable input 1 and input 2:
INP ON, (@1,2)
To measure the average input voltage, current, and power of input 1:
MEAS:VOLT? (@1)
MEAS:CURR? (@1)
MEAS:POW? (@1)
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Using the Protection Function
Protection function
Each input has independent protection functions. A front panel status indicator will turn on when a protection
function is set. Protection functions are latching, which means that they must be cleared once they are set.
Of the following protection functions, only OC, LIM+ and UVI are user-programmable.
–
OV: Over-voltage protection is a hardware OVP whose trip level is non-programmable and is fixed at 110% of
the rated input voltage. OVP is enabled by default.
–
OV-: Negative voltage protection is a hardware OVP.
–
OC: Over-current protection is a programmable function that can be enabled or disabled. When enabled, the
input will be disabled when the input current reaches the current limit setting.
–
OT: Over-temperature protection monitors the temperature of each input and shuts down the input if any tem-
perature exceeds the maximum factory-defined limits.
–
CP+: CP+ indicates that a positive power limit condition has disabled the input. Refer to Over-Power Protection
for further information.
–
INH: The Inhibit input (pin 3) on the rear panel digital connector can be programmed to act as an external shut-
down signal. Refer to Inhibit Input for further information.
–
LIM+: In CV, CP and CV mode, LIM+ indicates the input is in positive current limit. In CC mode, LIM+ indicates
the input is in positive voltage limit.
–
UVI: Under-voltage inhibit (UVI) protection. UVI is disabled by default. Refer to Under Voltage Inhibit for further
information.
Configuring protection
Protection functions are configured on the Load Settings window.
Press Load Settings to access the Load Settings window. Next, press Protection to access the protection functions.
OC Protection
With over-current protection enabled, the load disables the input if the input current reaches the current limit
setting, which causes a transition from CV to CC mode.
Press OCP State On to enable over-current protection.
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Press OCP State Off to disable over-current protection.
The EL30000 Series has fixed over-current protection that is always enabled. This protection will turn the
input off whenever the input current exceeds 105% of the high ranges and approximately 110% of the low current ranges.
You can also specify a delay to prevent momentary CV-to-CC status changes from tripping the OCP. The delay
can be programmed from 0 to 0.255 seconds. You can specify if the start of the delay is initiated by any transition into CC mode, or only at the end of a settings change in voltage, current or input state.
OCP Delay
The load may momentarily cross into CC mode when it is turned on, when an input value is programmed, or when
the DUT is connected. In most cases these temporary conditions would not be considered an over-current
protection fault, and having an OCP condition disables the input when the CC status bit is set would be a nuisance.
Specifying an OCP delay will ignore the CC status bit during the specified delay period.
To set the over-current protection delay, enter the delay value in the OCP Delay field. The delay can be programmed
from 0 to 0.255 seconds.
OCP Delay Start
Specifying an OCP Delay Start lets the OCP circuit ignore the CC status bit during the specified delay period. Once
the OCP delay time has expired and if the CC mode persists, the input will shut down.
You can specify the OCP delay start timer through:
–
CC Transition: Delay timer starts at any transition of the input into CC mode. Press OCP Start CC.
–
Setting Change: Delaytimer starts at the end of a settings change in voltage, current, or input state. Press OCP
Start Set.
OP Protection
With over-power protection enabled, the electronic load disables the input if the input power exceeds 110% of the
load's power rating.
Press OPP State On to enable over-power protection.
Press OPP State Off to disable over-power protection.
OPP Delay
Specifying an OPP delay prevent the over-power protection function from being triggered during the delaytime.
This prevents momentary input power spikes from triggering the over-power protection. A status bit (CP+) indicates
that the input has been turned off by a power limit condition.
To set the over-power protection delay, enter the delay value in the OPP Delay field. The delaycan be programmed
from 0 to 0.255 seconds.
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Under Voltage Inhibit
When the under-voltage inhibit function is enabled by selecting a mode, the load will not sink current until the input
voltage rises above the voltage-on setting.
Press UVI Mode to specify the under-voltage inhibit mode:
–
Off: Turns the under-voltage inhibit function off.
–
Live: Turns the input off whenever the voltage drops below the voltage-on setting. Turns the input back on
when the voltage reaches the voltage-on setting.
–
Latched: Lets the load sink current when the voltage subsequently drops below the voltage-on setting. An
under-voltage inhibit condition is annunciated by the UVI status bit.
Under-voltage inhibit is not available when loads are grouped or when the unit is operating in CV mode.
To set the voltage-on setting, enter the voltage-on value in the Voltage On field. The voltage-on value can be
programmed from 0 to 153 V.
Clears OVP, OCP and OPP Event
To clear the protection function, first remove that condition that caused the protection fault.
Press Protection Clear to clear the protection function and returns the input to its previous operating state.
From the remote interface:
To enable the over-current protection for input 1 and 2:
CURR:PROT:STAT ON, (@1,2)
To set the over-current protection delay time for input 1 at 0.1 seconds:
CURR:PROT:DEL 0.1, (@1)
To set the over-current protection delay timer start for input 1 to CC transition:
CURR:PROT:DEL:STAR CCTR, (@1)
To enable the over-power protection for input 1 and 2:
POW:PROT:STAT ON, (@1,2)
To set the over-power protection delay time for input 1 at 0.2 seconds:
POW:PROT:DEL 0.2, (@1)
To program a low-voltage limit (under-voltage inhibit) of 2 V, and enable the inhibit mode:
VOLT:INH:VON 2, (@1)
VOLT:INH:VON:MODE LIVE, (@1)
To clear protection for input 1:
INP:PROT:CLE (@1)
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Specifying 2-Wire or 4-Wire Sense
For EL33133A and EL34143A, you have the option to use the remote sense terminal on the front or rear panel to
measure the voltage from the device under test (DUT).
For EL34243A, you can only use the remote sense terminal located on the rear panel.
1. Press Load Settings.
2. Press Sense 2w or Sense 4w to select 2-wire sense or 4-wire sense.
3. Press Back to exit and return to the meter-view display.
The 2w mode closes a relay within the load to short the input and sense connectors. This means that only two wires
are used, and 4-wire sense is disabled. The 4w mode opens the relayin order to separate the input and 4-wire sense
inputs. By default, 2w is selected.
From the remote interface:
To set the remote sense relay to 4-wire sense at input 1:
VOLT:SENS EXT, (@1)
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Configuring the Input Turn-On/Turn-Off Sequence
Turn-on and turn-off delays control the turn-on and turn-off timing of the inputs in relation to each other.
Step 1 – Set the input voltage, current, power or resistance of the input channels:
Refer to steps 1 and 2 under Controlling the Inputs and set the input values of all inputs that will be sequenced.
Step 2 – Configure the turn-on turn-off delays:
Press Input Settings to access the Input Settings – On/Off Delays. Enter the On Delays and Off Delays for allinputs
that will participate in the input on/off delay sequence. Values can range from 0 to 1023 seconds.
Step 3 – Coupling selected inputs:
This step is only required if you will be including some inputs to participate in an input on/off delay sequence
or if you are coupling multiple electronic loads. If only a single input is to be used in the sequence, you can
skip this step.
From the menu, press On/Off Coupling to access the On/Off Coupling mode settings.
–
Press Coup CH 1 to toggle between Off and On in order to turn off or on the coupling for Input 1.
–
Press Coup CH 2 to toggle between Off and On in order to turn off or on the coupling for Input 2. (applicable
for EL34243A only)
Step 4 – Use the All Inputs On and Off keys:
Once input delays have been set, press [All On/Off] to start the On delay and Off delaysequence.
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[All On/Off] will turn ALL inputs on or off, whether they are configured to participate in an input on/off delay
sequence or not.
From the remote interface:
To program turn-on and turn-off delays for inputs 1 and 2:
INP:DEL:RISE 0.01, (@1)
INP:DEL:RISE 0.02, (@2)
INP:DEL:FALL 0.04, (@1)
INP:DEL:FALL 0.03, (@2)
To only include inputs 1 and 2 in a sequence:
INP:COUP:CHAN CH1,CH2
To turn on two coupled inputs in a sequence:
INP ON (@1:2)
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Specifying the Load Operating Mode
The operating modes of operation for Keysight EL30000 Series electronic load are:
–
Constant current (CC): In this mode, the electronic load will sink a current in accordance with the pro-
grammed value regardless of the input voltage. Note that a programmable voltage limit is not available. If the
DUT imposes a voltage above the voltage rating of the module, the overvoltage protection willtrip.
–
Constant voltage (CV): In this mode, the electronic load will sink enough current to control the DUT voltage to
the programmed value. The load acts as a shunt voltage regulator when operating in voltage priority mode.
–
Constant resistance (CR): In this mode, the electronic load will sink a current linearly proportional to the
voltage in accordance with the programmed resistance value.
–
Constant power (CP): In this mode, the electronic load will maintain the input power at the specified pro-
grammed power level.
When programmed to a mode, the electronic load remains in that mode until the mode is changed or until a fault
condition, such as an overpower or overtemperature, occurs.
Refer to the Load Operating Modes for more information.
1. Press Mode or press Load Settings > Mode.
2. Press CC, CV, CR, or CP to select the desired operation mode.
3. Press Back to exit.
Alternatively, you may also set the operating mode under Load Settings > Mode.
From the remote interface:
To specifythe load operating mode:
FUNC VOLT, (@1)
FUNC CURR, (@1)
FUNC RES, (@1)
FUNC POW, (@1)
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Configuring the Load Settings
Press Load Settings to access the available configuration for the EL30000 Series.
Operating modes
Press Mode to select one of the four operating modes (CC, CV, CR and CP). The parameters in Load Settings page
will change accordingly to the selected operating mode.
When switching between operating modes, the load input is turned off and the Load Settings revert to their
Power-on or RST values.
Constant current mode
In this mode, the load will sink a current in accordance with the programmed value regardless of the input voltage.
Note that a programmable voltage limit is not available. If the DUT imposes a voltage above the voltage rating of the
load, the overvoltage protection will trip.
Current - Lets you enter a current value with the numeric keys. Press Enter to enter the value. You can use the knob
to adjust the value in this field.
Range - Lets you select from three current ranges using the Range softkey. The low range provides better
resolution at low current settings. Alternatively, you can use the knob or press Enter to toggle between the ranges
in this field. See Programming Ranges.
Sense - The default sense setting is Local (2W), where the sense terminals are connected directly to the input
terminals. If you are using remote voltage sensing as explained under 4-Wire Sense, you must disconnect the sense
terminals from the input terminals. Toggling to 4W using the Sense softkey disconnects the sense terminals from
the input terminals. This lets you use remote voltage sensing. Alternatively, you can use the knob or press Enter to
toggle between the sense setting in this field.
Short - Lets you short the input terminals. This simulates a short circuit on the input of the load. It works in all
operating modes and temporarily overrides input and slew settings. Note that the input on/off and the input
protection functions take precedence over an input short. An input-short condition is annunciated by the SH status
bit. Press Enter to enable or disable short in this field.
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Current Slew - Specifies the maximum or fastest allowable slew rate (positive or negative) when checked.
Unchecking these boxes lets you enter a slower slew rate in the appropriate fields. Separate slew settings can be
programmed for CC, CV, CR, and CP modes.
Track - Lets the negative slew rate track the positive slew rate when checked. Uncheck this box if you want to
program asymmetrical positive and negative slew rates. If asymmetrical rates are programmed and tracking is
turned on, the negative value is changed to track the positive value.
Constant voltage mode
In this mode, the load will sink enough current to control the DUT voltage to the programmed value. The load acts
as a shunt voltage regulator when operating in CV mode.
Voltage - Lets you enter a voltage value with the numeric keys. Press Enter to enter the value. You can also use the
knob to adjust the value in this field.
Range - Lets you select from two voltage ranges. The low range provides better resolution at low voltage settings.
Alternatively, you can use the knob or press Enter to toggle between the ranges in this field. See Programming
Ranges.
Current Limit - You can specify a current limit that limits the input current when in CV mode. It is programmable up
to the rated current, with an over-range of 2%.
Refer to Constant current mode for descriptions of the Slew rate, Enable short, Track and Sense controls.
Constant resistance mode
In this mode, the load will sink a current linearly proportional to the voltage in accordance with the programmed
resistance value.
Resistance - Lets you enter a resistance value with the numeric keys. Press Enter to enter the value. You can also
use the knob to adjust the value in this field.
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Range - Lets you select from four overlapping resistance ranges. The lower ranges provide better resolution at low
resistance settings. Alternatively, you can use the knob or press Enter to toggle between the ranges in this field. See
Programming Ranges.
Current Limit - The current limit is fixed at the specified setting.
When changing ranges, the load input will be turned off, then back on again.
Refer to Constant current mode for descriptions of the Slew rate, Enable short, Track and Sense controls.
Constant power mode
In this mode, the load will maintain the input power at the specified programmed power level. Note that the load
has an independent power limit loop that regulates the input power at the limit setting - either 250 W (EL33133A),
350 W (EL34143A), or 300 W (EL34243A), with an over-range of 10%.
Power - Lets you enter a power value with the numeric keys. Press Enter to enter the value. You can also use the
knob to adjust the value in this field.
Range - Sets the power range. Lets you select from three power ranges. The value that you enter must be the
highest value in Watts that you expect to input. Alternatively, you can use the knob or press Enter to toggle between
the ranges in this field. See Programming Ranges.
Refer to Constant current mode for descriptions of the Slew rate, Enable short, Track and Sense controls.
From the remote interface:
To specifythe load operating mode:
FUNC VOLT, (@1)
FUNC CURR, (@1)
FUNC RES, (@1)
FUNC POW, (@1)
To set the voltage to 10 V, the current to 5 A, the resistance to 100 Ω, and power to 50 W:
VOLT 10, (@1)
CURR 5, (@1)
RES 100, (@1)
POW 50, (@1)
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Optionally, set a current limit value of 5 A while in CV mode:
CURR:LIM 5, (@1)
To select a lower current, power, or resistance range, program a value that falls within the range:
CURR:RANG 5, (@1)
RES:RANG 50, (@1)
POW:RANG 5, (@1)
To short the input terminals:
INP:SHOR ON, (@1:2)
To program a low-voltage limit (under-voltage inhibit) of 2 V, and enable the inhibit mode:
VOLT:INH:VON 2, (@1)
VOLT:INH:VON:MODE LIVE, (@1)
To set the current slew rate to 2 Amps/second:
CURR:SLEW 5, (@1)
To set the negative current slew, turn coupling (tracking) off. Then set the negative current slew:
CURR:SLEW:COUP OFF, (@1)
CURR:SLEW:NEG 3, (@1)
To set the sense terminals to remote sensing:
VOLT:SENS:SOUR EXT, (@1)
To query the setting of the sense terminals:
VOLT:SENS:SOUR? (@1)
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Specifying the Operation Mode (EL34243A only)
The Operation Mode allows you to specify the input capability when two independent inputs are being used.
–
Independant: This operation supply two independent inputs capability to a maximum rating of +150 V, +60 A.
In Independent mode, the instrument is at its default input state.
–
Parallel: This operation increases the current capability to a maximum rating of +150 V, +120 A. In Input-Par-
allel mode, the instrument doubles the input current on Input 1.
1. Press Input Settings > Operation Mode.
2. Press Independant or Parallel to select the desired operation mode.
3. Press Back to exit.
For input connection in Input-Parallel mode, see Parallel Connections for details.
From the remote interface:
To enable Input-parallel mode:
INP:PAIR PAR
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Using the Digital Control Port
Bi-directional digital IO
Digital input
Fault output
Inhibit input
Fault/inhibit system protection
Trigger input
Trigger output
Input Couple Controls
The wire connection to the digital port is not recommended to be longer than 3 meters.
A Digital Control Port consisting of three I/O pins is provided to access various control functions. Each pin is userconfigurable. The following control functions are available for the I/O pins:
Bi-directional digital IO
Each of the three pins can be configured as general purpose bi-directional digital inputs and outputs. The polarity of
the pins can also be configured. Pin 4 is the signal common for the digitalI/O pins. Data is programmed according
to the following bit assignments:
Pins 3 2 1
Bit Weight 2 (msb) 1 0 (lsb)
The digitalI/O pin can be used to control both relay circuits as well as digital interface circuits. The figure above
illustrates typicalrelaycircuits as well as digital interface circuit connections using the digitalI/O functions.
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From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Select the pin you wish to configure. For example, press Pin 1 to configure Pin 1.
3. Press Function and select Digital I/O. Select and program the remaining pins in the same manner. Press Back
to return to previous page.
4. Configure the polarity for each of the pin. Press Polarity Pos to select Positive and Polarity Neg to select Neg-
ative. Select and program the remaining pins in the same manner.
5. The In and Out field only apply to the Digital I/O and Digital In functions. Press Out to toggle and enter the bin-
ary bit (0 or 1) into the Out field of the digital I/O window. For Digital I/O function, a binary bit 1 with positive
polarity specify a voltage high at the pin while a binary bit 0 with positive polarity specify a voltage low at the pin.
The In field reflects the condition of the external signal that is applied to the pins.
From the remote interface:
To configure the digital I/O function for pins 1 through 3:
DIG:PIN 1:FUNC DIO
DIG:PIN 2:FUNC DIO
DIG:PIN 3:FUNC DIO
To configure the pin polarity to positive for pins 1 through 3:
DIG:PIN 1:POL POS
DIG:PIN 2:POL POS
DIG:PIN 3:POL POS
To send a binary weighted value to configure pins 1 through 3 as “111”:
DIG:OUTP:DATA 7
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Digital input
Each of the three pins can be configured as digital input only. The ground reference for the input pins is Signal
Common on pin 4.
From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Select the pin you wish to configure. For example, press Pin 1 to configure Pin 1.
3. Press Function and select Digital In. Select and program the remaining pins in the same manner. Press Back to
return to previous page.
4. Configure the polarity for each of the pin. Press Polarity Pos to select Positive and Polarity Neg to select Neg-
ative. Select and program the remaining pins in the same manner.
5.
The In and Out field only apply to the Digital I/O and Digital In functions. The In field reflects the condition of the
external signal that is applied to the pins. The pin state is not affected by the value of the binary output word.
From the remote interface:
To configure the pin function:
DIG:PIN 1:FUNC DINP
To select the pin polarity:
DIG:PIN 1:POL POS
DIG:PIN 1:POL NEG
To read the pin data:
DIG:INP:DATA?
Fault output
Pins 1 and 2 can be configured as a fault output. The Fault Output function enables a fault condition on any channel
to generate a protection fault signal on the digital port. The following conditions will generate a fault event: overvoltage, over-current, over-temperature and inhibit signal.
Both pins 1 and 2 are dedicated to this function. Pin 1 is the fault output; pin 2 is the common for pin 1. This
provides for an optically-isolated output. The polarity of pin 1 can also be configured. Note that the fault output
signal remains latched until the fault condition is removed and the protection circuit is cleared.
Pin 2's selected function is ignored. Pin 2 should be connected to the ground of the external circuit.
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From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Press Pin 1 to configure Pin 1.
3. Press Function and select Fault Out. Press Back to return to previous page.
4. Configure the polarity for each of the pin. Press Polarity Pos to select Positive and Polarity Neg to select Neg-
ative.
From the remote interface:
To configure the pin function:
DIG:PIN1:FUNC FAUL
To select the pin polarity:
DIG:PIN1:POL POS
DIG:PIN1:POL NEG
Inhibit input
Pin 3 can be configured as a remote inhibit input. The Inhibit Input function lets an external input signal control the
load input state of all the input channels in the load. The polarity of pin 3 can also be configured. The load input is
level triggered. The signal latency is less than 450 microseconds. Maximum time required for all the input channels
to start to turn off is 45 ms. Pin 4 is the common for pin 3.
The following non-volatile inhibit input modes can be programmed:
LATChing - causes a logic-true transition on the Inhibit input to disable the load input. The load input willremain
disabled after the inhibit signal is received.
LIVE - allows the enabled load input to follow the state of the Inhibit input. When the Inhibit input is true, the load
input is disabled. When the Inhibit input is false, the load input is re-enabled.
OFF - The Inhibit input is ignored.
From the front panel:
Configure Pin 3 as a remote inhibit input:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Press Pin 3 to configure Pin 3.
3. Press Function and select Inhibit In to configure Pin 3 as a remote inhibit input. Press Back to return to pre-
vious page.
4. Configure the polarity for Pin 3. Press Polarity Pos to select Positive and Polarity Neg to select Negative.
Alternatively, you can configure Pin 3 as a remote inhibit input by pressing Input Settings > Output Inhibit > DIO Pin
3 INH. In this setting, the polarity is set to Positive by default.
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Configure the inhibit input mode:
1. Press the Input Settings > Output Inhibit to configure the inhibit input mode.
2. Select the desired mode (Off, Latched or Live).
To clear the Inhibit protection function, first remove the external Inhibit signal. Then select Load Settings >
Protection Clear for all load inputs. This clears the Inhibit protection function and returns the load input to its
previous operating state.
From the remote interface:
To select the Inhibit function:
DIG:PIN3:FUNC INH
To select the pin polarity:
DIG:PIN3:POL POS
DIG:PIN3:POL NEG
To set Inhibit mode to Latching:
OUTP:INH:MODE LATC
To set Inhibit mode to Live:
OUTP:INH:MODE LIVE
To disable the Inhibit signal:
OUTP:INH:MODE OFF
Fault/inhibit system protection
The following figure illustrates some ways that you can connect the Fault/Inhibit pins of the connector.
As shown in the figure, when the Fault outputs and Inhibit inputs of several instruments are daisy-chained, an
internal fault condition in one of the units will disable all load inputs without intervention by either the controller or
external circuitry. Note that when using the Fault/Inhibit signals in this manner, both signals must be set to the
same polarity.
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You can also connect the Inhibit input to a manual switch or external control signal that willshort the Inhibit pin to
common whenever it is necessaryto disable all load inputs. Negative polarity must be programmed for all pins in
this case. You can also use the Fault output to drive an external relay circuit or signal other devices whenever a userdefinable fault occurs.
Clearing a System Protection Fault
To restore all instruments to a normal operating condition when a fault condition occurs in a daisy-chained system
protection configuration, two fault conditions must be removed:
1.
The initial protection fault or external Inhibit signal.
2.
The subsequent daisy-chained fault signal (which is sourced by the Inhibit signal).
Even when the initial fault condition or external signal is removed, the fault signal is still active and will continue to shut down the load inputs of all the units.
To clear the daisy-chained fault signal if the operating mode of the Inhibit input is Live, simply clear the input
protection on any ONE unit by pressing Load Settings > Protection Clear for all load inputs.
If the operating mode of the Inhibit input is Latched, turn off the inhibit input and clear the input protection for all
load inputs on ALL units individually. To re-enable the chain, re-program the Inhibit input on each unit to Latched
mode.
Trigger input
Any of the Digital Control pins can be programmed to function as a trigger input. All pins are referenced to the
signal common pin.
To input an external trigger signal, you can apply either a negative-going or a positive-going pulse to the designated
trigger input pin. The trigger latency is less than 450 microseconds. The minimum pulse width is 2 microseconds.
The pin’s polarity setting determines which edge generates a trigger-in event. Positive means a rising edge and
Negative means a falling edge.
You can configure the data logger and the Input LIST to be triggered by external trigger signals. Simply select DIO
Trigger In as the trigger source when configuring the data logger and Input LIST. This will enable input trigger
signals on the configured digital pins. A trigger is generated when an external signal that meets the signal criteria is
applied to any configured trigger input pin.
From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Select the pin you wish to configure. For example, press Pin 1 to configure Pin 1.
3. Press Function and select Trigger In. Select and program the remaining pins in the same manner. Press Back
to return to previous page.
4. Configure the polarity for each of the pin. Press Polarity Pos to select Positive and Polarity Neg to select Neg-
ative. Select and program the remaining pins in the same manner.
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From the remote interface:
To select the trigger input function:
DIG:PIN1:FUNC TINP
To select the pin polarity:
DIG:PIN1:POL POS
DIG:PIN1:POL NEG
Trigger output
Any of the Digital Control pins can be programmed to function as a trigger output. All pins are referenced to the
Signal Common pin.
When configured as a trigger output, the designated trigger pin will generate a 10-microsecond trigger pulse in
response to a trigger event. The polarity setting can be either positive-going (rising edge) or negative-going (falling
edge) when referenced to common.
Trigger out signals can be generated when configuring the voltage and current in the Input LIST. If you check the
BOST and EOST boxes when configuring the Input LIST, an output trigger signal will be generated on the configured
digital pin at the start and end of the voltage and current step.
From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Select the pin you wish to configure. For example, press Pin 1 to configure Pin 1.
3. Press Function and select Trigger Out. Select and program the remaining pins in the same manner. Press Back
to return to previous page.
4. Configure the polarity for each of the pin. Press Polarity Pos to select Positive and Polarity Neg to select Neg-
ative. Select and program the remaining pins in the same manner.
From the remote interface:
To select the trigger output function:
DIG:PIN1:FUNC TOUT
To select the pin polarity:
DIG:PIN1:POL POS
DIG:PIN1:POL NEG
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Input couple controls
This function lets you connect multiple Keysight EL30000 Series electronic loads together and synchronize the
input on/off sequence across units. Each load that willbe synchronized must have at least one coupled input.
1.
Configure the inputs on each load as described under Configuring the Input Turn-On/Turn-Off Sequence. Set
the input coupling mode to ON.
2.
Set the delay offset of each individual unit to match the longest delay offset of the load's group.
3.
Connect and configure the digital connector pins of the synchronized loads as described in this section.
All synchronized EL30000 Series electronic loads must have the same firmware revision. Only pins 1 through 3
can be configured as synchronization pins. You cannot configure more than one On Couple and one Off Couple
pin per electronic load. The polarity of the pins is not programmable; it is set to Negative.
The digitalconnector pins of the synchronized load that contain coupled inputs must be connected together as
shown in the following figure. In this example, pin 2 will be configured as the input On control. Pin 3 will be
configured as the input Off control. The ground or Common pins also need to be connected together.
Only two of the digital connector pins on each load can be configured as “On Couple” and “Off Couple” on each
synchronized load. The designated pins will function as both an input and an output, with a negative transition on
one pin providing the synchronization signal to the other pins.
From the front panel:
1. Press Utilities > I/O Config > Digital IO to access the Digital I/O window.
2. Press Pin 2. Press Function and select Couple On.
3. Press Pin 3. Press Function and select Couple Off.
4.
Repeat these steps for load #2 and #3.
From the remote interface:
To configure pin 2 of load #1 as the ON control:
DIG:PIN2:FUNC ONC
To configure pin 3 of load #1 as the OFF control:
DIG:PIN3:FUNC OFFC
Repeat these commands for load #2 and #3.
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Operation
Once configured and enabled, turning the load input on or off on any coupled input will cause all coupled inputs on
all configured loads to turn on or off according to their user-programmed delays. This applies to the front panel On
and Off keys, the Web server, and to SCPI commands.
Turning the load inputs on or off using the front panel [All On/Off] key will cause all coupled inputs as well as non-
coupled inputs on that load to turn on or off.
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Using the Sequencer Function (EL34143A and EL34243A only)
LIST mode
Continuous mode
Pulse mode
Toggle mode
There are four types of sequencer mode: LIST, Continuous, Pulse, and Toggle.
Press Sequencer to select the sequencer type.
Press Back to return to Sequencer main menu.
LIST mode
LIST mode lets you generate complex sequences of input changes with rapid, precise timing, which may be
synchronized with internal or external signals. This is useful when running test sequences with a minimum amount
of programming overhead.
The Sequencer LIST allows single or multiple inputs to run in sequence. You can set the followings for each of the
input in sequence.
1.
Set the step that will generate the trigger out signal at the beginning/end of the step.
2.
Set the last input value after the sequence list completes.
3.
Set how the list responds to triggers.
4.
Set the transient mode for voltage and current.
5.
Set the trigger source for the transient system.
6.
Set the trigger delay in seconds.
7.
Set the list repeat count.
8.
Set the list to repeat continuously.
You can configure up to 100 steps in the Sequencer LIST window.
Step 1– Add/remove steps to/from the LIST
Press Sequencer to access the Sequencer LIST window.
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Press Add to insert a new step below the selected step. Note that the values in the new step are copied from the
previous step. Continue to add steps until your sequence is complete. Use the navigation keys to move through the
list.
Press Delete if you want to delete the selected step or press Clear All if you want to remove all steps from the list.
Step 2 – Configure the input sequence
Configure the input sequence parameter accordingly. Use the navigation keys to select the field; use the numeric
entry keys to enter the value. The value is set when you press [Enter].
When switching between operating modes, the load input parameter will change accordingly. For example,
switching to CP mode will change the existing Current field to Power.
Fields Description
Voltage
Current
Resistance
Power
Time Sets the run-time for selected step in seconds.
BOST Enables check box to set which step will generate a trigger-out signal at the beginning of the step (BOST).
EOST Enables check box to set which step will generate a trigger-out signal at the end of the step (EOST).
Sets the voltage, current, resistance, or power value for selected step in voltage, ampere, ohms, or watts.
For additional settings, press Properties to open the Sequencer LIST Properties window. Configure the Sequencer
LIST accordingly. Refer to the below table for details.
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Settings AvailableKey
Settings
Description
Current After List
Voltage After List
Resistance After List
Power After List
Pace Dwl or Trg Configures the pacing of the step.
Current Mode
Voltage Mode
Resistance Mode
Power Mode
DC or List Specifies what happens when the input sequence completes.
Default is DC.
Action required:
Press Curr List, Volt List, Res List, or Pow List to toggle between DC and List.
DC (Return to DC
Value)
List (Last List Value) Remains at the last list value.
Default is Dwl.
Action required:
Press Pace to toggle between Dwl and Trg.
Dwl(Dwell) The next step immediately inputs when the dwell time has elapsed.
Trg (Trigger) The next step immediately inputs when an external trigger is
Fix, Stp, or Lst Sets the current/voltage/resistance/power mode. This determines what happens to the
input current/voltage/resistance/power when the system is initiated or triggered.
Default is Fix.
Action required:
Returns to the DC value that was in effect before the input sequence
started.
received. If the step time completes before trigger occurs, the step
remains at the last list value while waiting for the trigger.
90
Press Curr Mode, Volt Mode, Res Mode, or Pow Mode to toggle between Fix, Stp, and Lst.
Fix (Fixed) Keeps the input at its immediate value.
Stp (Step) Steps the input to the triggered level when a trigger occurs
Lst (List) Causes the input to follow the list values when a trigger occurs.
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Settings AvailableKey
Description
Settings
Trigger Source Key, IO, or Rmt Sets the trigger source for the system.
Default is Key.
Action required:
Press Trig Src to toggle between Key, IO, and Rmt.
Key (List Run/Stop Key) Selects the Run Stopped softkey as a trigger
source.
IO (DIO Trigger In) Selects any configured digital IO (with Trigger
Input function) as a trigger source
Rmt (Remote Command) Selects a remote interface command as a trigger
source.
Trigger Delay 0 to 0.255 s Sets the trigger delay in seconds.
Default is 0 s.
Repeat Count 1 to 9999 Sets the list repeat count. This sets the number of times that a list is executed before it
completes.
Default is 1.
Continuous - Enables check box to repeat the list continuously.
Step 3 – Run the input sequence list
When Sequencer LIST is initiated, all the List properties cannot be configured, which includes adding or
removing step from the list.
When Step mode transient system is initiated, properties such as voltage mode, current mode, resistance
mode, power mode, trigger source, and trigger delay cannot be configured.
If both Voltage and Current Mode is set to Fix and Trigger Source is set to Key, pressing
set both voltage and current mode to List and start the list operation.
In this example, the load operation is in CC mode.
– Set Current Mode to List: Press Curr Mode Lst.
– Set Trigger Source to Key. Press Trig Src Key.
– Press the color-coded [On] key to enable the selected input.
– Press Run to start the list operation. To abort the operation, press Stop.
– Press Back to exit and return to the previous menu.
will automatically
Run
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From the remote interface:
To configure the load operating mode to CC mode:
FUNC CURR, (@1)
To set the sequencer to LIST mode:
TRAN:MODE LIST, (@1)
To configure the List current of input 1 with 0.1 A, 0.2 V, 0.3 A, 0.4 A and 0.5 A:
LIST:CURR 0.1,0.2,0.3,0.4,0.5, (@1)
To configure allthe List time of input 1 with 1 s:
LIST:DWELL 1,1,1,1,1, (@1)
To enable all the List BOST of input 1:
LIST:TOUT:BOST 1,1,1,1,1, (@1)
To disable all the List EOST of input 1:
LIST:TOUT:EOST 0,0,0,0,0, (@1)
To set the current mode of input 1 to List:
CURR:MODE LIST, (@1)
To set the trigger source of input 1 to Key/Immediate:
TRIG:SOUR IMM, (@1)
To enable input 1:
INP ON, (@1)
To initiate the transient operation sequence:
INIT:TRAN, (@1)
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Continuous mode
Continuous mode generates repetitive pulse stream that toggles between two load levels.
The two load levels are main level (immediate or triggered) and transient level for current, voltage, power or
resistance. The period, frequency and duty cycle of the continuous pulse train are programmable.
Step 1– Configure the sequence properties
Configure the Sequencer Continuous accordingly. Refer to the below table for details.
Parameter Available Key Settings Description
Transient Setting (I1,
V1, P1, or R1)
Period/Frequency 8µ to 4 s / 0.25 to 10000HzSets the transient frequency or period in Hz and seconds.
Duty Cycle 1.8 to 98.2% Sets the transient duty cycle.
Current Mode
Voltage Mode
Resistance Mode
Power Mode
minimum to maximum Sets the transient voltage, current, resistance, or power level in voltage, ampere, ohms, or
watts.
Fix, Stp, or Lst Sets the current/voltage/resistance/power mode. This determines what happens to the
input current/voltage/resistance/power when the system is initiated or triggered.
Default is Fix.
Action required:
Press Curr Mode, Volt Mode, Res Mode, or Pow Mode to toggle between Fix, Stp, and Lst.
Fix (Fixed) Keeps the input at its immediate value.
Stp (Step) Steps the input to the triggered level when a trigger occurs
Lst (List) Causes the input to follow the list values when a trigger occurs.
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Parameter Available Key Settings Description
Trigger Source Key, IO, or Rmt Sets the trigger source for the system.
Default is Key.
Action required:
Press Trig Src to toggle between Key, IO, and Rmt.
Key (List Run/Stop Key) Selects the Run Stopped softkey as a trigger
source.
IO (DIO Trigger In) Selects any configured digital IO (with Trigger
Input function) as a trigger source
Rmt (Remote Command) Selects a remote interface command as a trigger
source.
Trigger Delay 0 to 0.255 s Sets the trigger delay in seconds.
Default is 0 s.
Repeat Count 1 to 9999 Sets the list repeat count. This sets the number of times that a list is executed before it
completes.
Default is 1.
Continuous - Enables check box to repeat the list continuously.
Step 2 – Run the input sequence
In this example, the load operation is in CV mode.
– Set V1, period, frequency, duty cycle, trigger delay and repeat count accordingly: Use the navigation keys to
select the field; use the numeric entry keys to enter the value. The value is set when you press [Enter].
– Set Trigger Source to Key. Press Trig Src Key.
– Press the color-coded [On] key to enable the selected input.
– Press Run to start the sequence operation. To abort the operation, press Stop.
– Press Back to exit and return to the previous menu.
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From the remote interface:
To configure the load operating mode to CV mode:
FUNC VOLT, (@1)
To set the sequencer to Continuous mode:
TRAN:MODE CONT, (@1)
To configure main voltage level with 5 V:
VOLT 5, (@1)
To configure the value for the transient voltage level with 10 V:
VOLT:TLEV 10, (@1)
To configure the transient frequency with 50 Hz :
TRAN:FREQ 50, (@1)
To configure the transient duty cycle with 10.5%:
TRAN:DCYC 10.5, (@1)
To configure trigger delay with 0.2 s:
TRIG:TRAN:DEL 0.2, (@1)
To configure the transient repeat count with 20:
TRAN:COUN 20, (@1)
To set the trigger source of input 1 to Key/Immediate:
TRIG:TRAN:SOUR IMM, (@1)
To configure the input voltage to follow transient value when a trigger occurs:
VOLT:MODE LIST
To enable input 1:
INP ON, (@1)
To initiate the transient operation sequence:
INIT:TRAN, (@1)
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Pulse mode
Pulse mode generates a load change that returns to its original state after some time period.
It is similar to continuous operation with the following exceptions:
– To get a pulse, an explicit trigger is required.
– One pulse results from each trigger. Therefore, frequency cannot be programmed. The pulse width is
programmable.
Step 1– Configure the sequence properties
Configure the Sequencer Pulse accordingly. Refer to the below table for details.
Parameter Available Key
Settings
Pulse Setting (I1, V1,
P1, or R1)
Width 0.00005 to 268.435 The width of the pulse.
Current Mode
Voltage Mode
Resistance Mode
Power Mode
minimum to maximum Sets the transient voltage, current, resistance, or power level in voltage, ampere, ohms, or
watts.
Default is 0.0005 s.
Fix, Stp, or Lst Sets the current/voltage/resistance/power mode. This determines what happens to the
input current/voltage/resistance/power when the system is initiated or triggered.
Default is Fix.
Action required:
Press Curr Mode, Volt Mode, Res Mode, or Pow Mode to toggle between Fix, Stp, and Lst.
Fix (Fixed) Keeps the input at its immediate value.
Stp (Step) Steps the input to the triggered level when a trigger occurs
Lst (List) Causes the input to follow the list values when a trigger occurs.
Description
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Parameter Available Key
Settings
Trigger Source Key, IO, or Rmt Sets the trigger source for the system.
Default is Key.
Action required:
Press Trig Src to toggle between Key, IO, and Rmt.
Key (List Run/Stop Key) Selects the Run Stopped softkey as a trigger
IO (DIO Trigger In) Selects any configured digital IO (with Trigger
Rmt (Remote Command) Selects a remote interface command as a trigger
Trigger Delay 0 to 0.255 s Sets the trigger delay in seconds.
Default is 0 s.
Step 2 – Run the input sequence
In this example, the load operation is in CV mode.
Description
source.
Input function) as a trigger source
source.
– Set V1, pulse width, trigger delay and repeat count accordingly: Use the navigation keys to select the field; use the
numeric entry keys to enter the value. The value is set when you press [Enter].
– Set Trigger Source to Key. Press Trig Src Key.
– Press the color-coded [On] key to enable the selected input.
– Press Run to start the sequence operation. To abort the operation, press Stop.
– Press Back to exit and return to the previous menu.
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From the remote interface:
To configure the load operating mode to CV mode:
FUNC VOLT, (@1)
To set the sequencer to Pulse mode:
TRAN:MODE PULS, (@1)
To configure main voltage level with 5 V:
VOLT 5, (@1)
To configure the value for the transient voltage level with 10 V:
VOLT:TLEV 10, (@1)
To configure the transient pulse width with 0.5 s :
TRAN:TWID 0.5, (@1)
To set the trigger source of input 1 to Key/Immediate:
TRIG:TRAN:SOUR IMM, (@1)
To configure the input voltage to follow transient value when a trigger occurs:
VOLT:MODE LIST
To enable input 1:
INP ON, (@1)
To initiate the transient operation sequence:
INIT:TRAN, (@1)
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Toggle mode
Toggle mode generates a repetitive pulse stream that toggles between two load levels. It causes the load input to
alternate between two pre-defined levels as in continuous operation except that the transient points are controlled
by explicit triggers instead of an internal transient generator.
Step 1– Configure the sequence properties
Configure the Sequencer Toggle accordingly. Refer to the below table for details.
Parameter Available Key Settings Description
Transient Setting
(I1, V1, P1, or R1)
Current Mode
Voltage Mode
Resistance Mode
Power Mode
Trigger Source Key, IO, or Rmt Sets the trigger source for the system.
minimum to maximum Sets the transient voltage, current, resistance, or power level in voltage, ampere, ohms, or
watts.
Fix, Stp, or Lst Sets the current/voltage/resistance/power mode. This determines what happens to the input
current/voltage/resistance/power when the system is initiated or triggered.
Default is Fix.
Action required:
Press Curr Mode, Volt Mode, Res Mode, or Pow Mode to toggle between Fix, Stp, and Lst.
Fix (Fixed) Keeps the input at its immediate value.
Stp (Step) Steps the input to the triggered level when a trigger occurs
Lst (List) Causes the input to follow the list values when a trigger occurs.
Default is Key.
Action required:
Press Trig Src to toggle between Key, IO, and Rmt.
Key (List Run/Stop Key) Selects the Run Stopped softkey as a trigger source.
IO (DIO Trigger In) Selects any configured digital IO (with Trigger Input
function) as a trigger source
Rmt (Remote Command) Selects a remote interface command as a trigger
source.
Trigger Delay 0 to 0.255 s Sets the trigger delay in seconds.
Default is 0 s.
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Step 2 – Run the input sequence
In this example, the load operation is in CC mode.
– Set I1, trigger delay and repeat count accordingly: Use the navigation keys to select the field; use the numeric
entry keys to enter the value. The value is set when you press [Enter].
– Set Trigger Source to Key. Press Trig Src Key.
– Press the color-coded [On] key to enable the selected input.
– Press Run to start the sequence operation. To abort the operation, press Stop.
– Press Back to exit and return to the previous menu.
From the remote interface:
To configure the load operating mode to CC mode:
FUNC CURR, (@1)
To set the sequencer to Toggle mode:
TRAN:MODE TOGG, (@1)
To configure the main current level with 5 A:
CURR 5, (@1)
To configure the value for the transient current level with 10 A:
CURR:TLEV 10, (@1)
To set the trigger source of input 1 to Key/Immediate:
TRIG:TRAN:SOUR IMM, (@1)
To configure the input voltage to follow transient value when a trigger occurs:
CURR:MODE LIST
To enable input 1:
INP ON, (@1)
To initiate the transient operation sequence:
INIT:TRAN, (@1)
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