Keysight N8900 Series
Autoranging System
DC Power Supply
Operating and
Service Guide
1 Preliminary Information 5
Documentation and Firmware Revisions 5
Contacting Keysight Technologies 5
Legal and Safety Information 6
Legal Notices 6
Safety Symbols 8
Safety Notices 9
Models and Options 12
Model Ratings 12
Accsssories/Options 12
Specifications and Characteristics 13
Specifications 13
Supplemental Characteristics 5 kW 15
Supplemental Characteristics 10 kW 16
Supplemental Characteristics 15 kW 17
Common Characteristics 18
Autoranging Characteristics 19
Dimension Diagrams 20
2 Operating Information 21
Introduction to the Instrument 22
Front Panel at a Glance 23
Front Panel Display at a Glance 23
Front Panel Keys at a Glance 24
Rear Panel at a Glance 25
Front Panel Menu 26
Installing the Instrument 28
Before Installation or Use 29
AC Mains Connections 31
Single Unit Connections 35
Multiple Unit Connections 42
External Control Signal Connections (Analog) 46
Interface Connections 47
Getting Started 50
Turn the Unit On 50
Set the Output Voltage 50
Set the Output Current 51
Set the Over-Voltage Protection 52
Enable the Output 54
Use the Built-in Help System 54
Remote Interface Configuration 55
USB Configuration 55
GPIB Configuration 55
LAN Configuration 56
Modifying the LAN Settings 57
Using the Web Interface 59
Using Telnet 60
2 Keysight N8900 Series Operating and Service Guide
Using Sockets 61
Interface Lockout 61
Using the Power Supply 62
Programming the Output 63
Programming Output Protection 64
Programming Output Steps 66
MakingMeasurements 69
Parallel Operation 70
External Control Signal Programming 73
System-Related Operations 81
Operating Mode Tutorial 83
SAS Operation 85
3 SCPI Programming Reference 91
Related Information 92
Introduction to the SCPI Language 93
Command Types 93
Keywords 94
Queries 94
Command Separators and Terminators 94
Syntax Conventions 95
Parameter Types 96
Device Clear 97
Commands by Subsystem 98
Subsystem 98
Common Commands 98
Additional Commands 98
Calibrate Commands 99
Current Commands 102
Digital Commands 104
Display/LXI Commands 105
Measure Commands 106
Output Commands 107
Solar Array Simulator Commands 109
Status Commands 114
System Commands 121
Trigger Commands 127
Voltage Commands 129
Status Tutorial 130
Command Quick Reference 135
ABORt Command 135
CALibrate Commands 135
CURRent Commands 135
DIGital Command 136
DISPlay Command 136
IEEE-488 Commands 136
INITiate Commands 136
LXI Command 137
Keysight N8900 Series Operating and Service Guide 3
MEASure Commands 137
MEMory Commands 137
OUTPut Commands 137
SASimulator Commands 138
STATus Commands 138
SYSTem Commands 139
TRIGger Commands 139
VOLTage Commands 139
Reset State (*RST) 140
SCPI Error Messages 142
Compatibility Commands 148
Channel Parameter 148
Code Compatible Commands 148
4 Service and Maintenance 149
Introduction 150
Types of Service Available 150
Before Returning the Unit 150
Repackaging for Shipment 150
Verification and Calibration 151
Verification 151
Calibration Interval 151
Test Considerations 151
Measurement Techniques 152
Recommended Test Equipment and Setups 153
Performance Verification 155
Calibration Procedure 160
Test Record Forms 165
Self-Test Procedure 180
Power-On Self-Test 180
User-Initiated Self-Test 180
Firmware Update 181
Software Required 181
Update Procedure 181
Restricting Access 181
Instrument Sanitize 182
Calibration Switches 183
Accessing the Calibration Switch 183
Switch Functions 183
Disassembly 185
Electrostatic Discharge (ESD) Precautions 185
Cover Removal 185
Manual Backdating 187
Output Terminal Isolation 187
Analog Control Operation 187
SAS Operation 188
Index 189
4 Keysight N8900 Series Operating and Service Guide
Keysight N8900 Series Operating and Service Guide
1 Preliminary Information
Legal and Safety Information
Models and Options
Specifications and Characteristics
This document includes user, service, and programming information for the
Keysight N8900 Series Autoranging System DC Power Supply.
Documentation and Firmware Revisions
You can download the latest version of this document at
www.keysight.com/find/n8900-doc. The latest version is also available for
mobile devices at www.keysight.com/find/n8900-mobilehelp. If you have
feedback on this document, please contact Keysight at
www.keysight.com/find/n8900-docfeedback.
For the latest firmware revision go to Firmware Updates.
Contacting Keysight Technologies
Use www.keysight.com/find/assist for information on contacting Keysight
worldwide, or contact your Keysight Technologies representative.
© Copyright Keysight Technologies 2013 - 2017
1 Preliminary Information
Legal and Safety Information
Legal Notices
Safety Symbols
Safety Notices
Legal Notices
Copyright Notice
© Copyright Keysight Technologies 2013 - 2017
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 Inc. as governed by United States and international copyright laws.
Manual Part Number
Manual part number N8900-90901
Edition
Edition 6, updated December 2017
Published By
Keysight Technologies
550 Clark Drive, Suite 101
Budd Lake, New Jersey 07828
USA
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.
6 Keysight N8900 Series Operating and Service Guide
1 Preliminary Information
U.S. Government Rights
The Software is “commercial computer software,” as defined by Federal Acquisition Regulation (“FAR”) 2.101.
Pursuant to FAR 12.212 and 27.405-3 and Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S.
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
Declaration of Conformity
Declarations of Conformity for this product and for other Keysight products may be downloaded from
the Web. Go to http://www.keysight.com/go/conformity and click on “Declarations of Conformity.”
You can then search by product number to find the latest Declaration of Conformity.
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This product complies with the WEEE Directive 2002/96/EC marketing 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 our local Keysight office, or see
http://www.keysight.com/environment/product for more information.
Keysight N8900 Series Operating and Service Guide 7
1 Preliminary Information
Safety Symbols
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.
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 CAUTION
notice until the indicated conditions are fully understood and met.
Direct current
Alternating current
Frame or chassis terminal
Standby supply. Unit is not completely disconnected from AC mains when switch is off.
Caution, risk of electric shock
Caution, refer to accompanying documents
Earth ground terminal
The CE mark is a registered trademark of the European Community.
The TUV mark is a registered trademark of the European community.
The C-tick mark is a registered trademark of the Spectrum Management Agency of Australia. This
signifies compliance with the Australian EMC Framework regulations under the terms of the Radio
Communications Act of 1992.
South Korean Class A EMC Declaration
This equipment is Class A suitable for professional use and is for use in electromagnetic environments outside of the home.
Contains one or more of the 6 hazardous substances above the maximum concentration value
(MCV), 40 Year EPUP.
8 Keysight N8900 Series Operating and Service Guide
1 Preliminary Information
ISM1-A This text indicates that the instrument is an Industrial Scientific and Medical Group 1 Class A
product (CISPER 11, Clause 4).
ICES/NMB-001 This text indicates product compliance with the Canadian Interference- Causing Equipment Stand-
ard (ICES-001).
Safety Notices
The following general safety precautions must be observed during all phases of operation of this
instrument. Failure to comply with these precautions or with specific warnings or instructions
elsewhere in this manual violates safety standards of design, manufacture, and intended use of the
instrument. Keysight Technologies assumes no liability of the customer’s failure to comply with the
requirements.
The equipment is for industrial use. It is not applicable for IT mains supply systems. Equipment
operators are subject to all applicable safety regulations. Along with the warning and safety notices in
this manual, all relevant safety, accident prevention, and environmental regulations must also be
followed. In particular, the operators of the equipment:
l Must be informed of the relevant safety requirements.
l Must have read and understood the operating manual before using the equipment.
l Must use the designated and recommended safety equipment.
General
Do not use this product in any manner not specified by the manufacturer. The
protective features of this product may be impaired if it is used in a manner not
specified in the operating instructions. Only operate the product at the rated mains
voltage and phase as stipulated on the input label.
Environmental Conditions
Never use the instrument outside of the specified environmental conditions described
under Common Characteristics.
Ground the Instrument
This product is provided with protective earth terminals. To minimize shock hazard,
the instrument must be connected to the AC mains through a grounded power cable,
with the ground 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 injury or death.
Keysight N8900 Series Operating and Service Guide 9
1 Preliminary Information
Before Applying Power
Verify that all safety precautions are taken.
All rear panel connections must be made with the unit turned off, and must be
performed by qualified personnel who are aware of the hazards involved. Improper
actions can cause fatal injury as well as equipment damage.
Note the instrument's external markings described under "Safety Symbols".
HAZARDOUSVOLTAGES
All models generate voltages above 60 VDC, with some models rated at up to 1,500
VDC! Ensure that all instrument connections, load wiring, and load connections are
insulated or covered -so that no accidental contact with lethal voltages can occur.
SHOCK HAZARD
Turn off AC power before making rear panel connections.
Ensure that any residual voltages present at the + and -output terminals are
discharged before touching the output terminals. To fully discharge the output
terminals, momentarily connect a DVM rated at 1,000 VDC between the + output
terminal and ground. Repeat this procedure for the – output terminal.
Do not use this DVM on units that are powered ON with voltages >1000 VDC.
EQUIPMENTDAMAGE and SHOCK HAZARD
Do not connect anything other than the Sharing wires from other units to the Sharing
inputs. Do not connect or disconnect wires when the unit is on or damage may occur.
The Sharing connections are not for voltage sensing. Voltages greater than 18 VDC
will permanently damage the Sharing inputs. Damaged Sharing inputs cause
unknown voltages at the output terminals that may exceed hazardous levels.
External Voltage Sources
Do not connect voltage sources to the output of the power supply with voltage
ratings that are greater than the nominal voltage rating of the supply. Under no
circumstances can you connect an external voltage with reversed polarity to the
output terminal. Equipment damage will result.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes.
Do Not Remove the Instrument Cover
Only qualified, service-trained personnel who are aware of the hazards involved
should remove instrument covers. Always disconnect the power cable and any
external circuits before removing the instrument cover.
10 Keysight N8900 Series Operating and Service Guide
1 Preliminary Information
Do Not Modify the Instrument
Do not install substitute parts or perform any unauthorized modification to the
product. Return the product to a Keysight Sales and Service Office for service and
repair to ensure that safety features are maintained.
Fuses
The instrument contains internal fuses, which are not customer accessible.
Cleaning
To prevent electric shock, disconnect the AC mains before cleaning. Clean the
outside of the instrument with a soft, lint-free, slightly damp cloth. Do not use
detergent. Disassembly is not required or recommended for cleaning.
In Case of Damage
Instruments that are not functioning correctly, appear damaged or defective should
be made inoperative and secured against unintended operation until they can be
repaired by qualified service personnel.
Keysight N8900 Series Operating and Service Guide 11
1 Preliminary Information
Models and Options
Model Ratings
5 kW Models Voltage Current AC mains
Keysight N8920A
Keysight N8921A
Keysight N8923A
Keysight N8924A
Keysight N8940A
Keysight N8941A
Keysight N8943A
Keysight N8944A
10 kW Models Voltage Current AC mains
Keysight N8925A
Keysight N8926A
Keysight N8928A
Keysight N8929A
Keysight N8930A
Keysight N8945A
Keysight N8946A
Keysight N8948A
Keysight N8949A
Keysight N8950A
80 V
200 V
500 V
750 V
80 V
200 V
500 V
750 V
80 V
200 V
500 V
750 V
1000 V
80 V
200 V
500 V
750 V
1000 V
170 A
70 A
30 A
20 A
170 A
70 A
30 A
20 A
340 A
140 A
60 A
40 A
30 A
340 A
140 A
60 A
40 A
30 A
208 VAC
208 VAC
208 VAC
208 VAC
400 VAC
400 VAC
400 VAC
400 VAC
208 VAC
208 VAC
208 VAC
208 VAC
208 VAC
400 VAC
400 VAC
400 VAC
400 VAC
400 VAC
15 kW Models Voltage Current AC mains
Keysight N8931A
Keysight N8932A
Keysight N8934A
Keysight N8935A
Keysight N8937A,
Keysight N8937APV
Keysight N8951A
Keysight N8952A
Keysight N8954A
Keysight N8955A
Keysight N8957A,
Keysight N8957APV
80 V
200 V
500 V
750 V
1500 V
1500 V
80 V
200 V
500 V
750 V
1500 V
1500 V
Accsssories/Options
Accessory/Option Number Description
Keysight N8958A
SAS Curve Generator software
Rack Mount Kit for all models
N8937APV/N8957APV only: www.keysight.com/find/N8900APVsoftware
510 A
210 A
90 A
60 A
30 A
30 A
510 A
210 A
90 A
60 A
30 A
30 A
208 VAC
208 VAC
208 VAC
208 VAC
208 VAC
208 VAC
400 VAC
400 VAC
400 VAC
400 VAC
400 VAC
400 VAC
12 Keysight N8900 Series Operating and Service Guide
1 Preliminary Information
Specifications and Characteristics
Specifications
Supplemental Characteristics
CommonCharacteristics
Autoranging Characteristics
DimensionDiagrams
Unless otherwise noted, specifications are warranted over the ambient temperature range of 0°C to
45°C after a 30-minute warm-up period. Specifications apply from >2% to 100% of the rated voltage
and from >1% to 100% of the rated current, measured at the output terminals with local sensing
(sense terminals not connected).
Supplemental characteristics are not warranted but are descriptions of performance determined
either by design or by type testing. All supplemental characteristics are typical unless otherwise
noted.
Specifications and characteristics are subject to change without notice.
Specifications
Specification 5 kW N8920A/
N8940A
DC Ratings
Voltage:
Current:
Power:
Output ripple & noise
CV rms:
CV peak-to-peak:
Load regulation
Voltage:
Current:
Voltage programming &
measurement accuracy
Current programming &
measurement accuracy
1
2
2
0 - 80 V
0 - 170 A
5 kW
16 mV
200 mV
40 mV
255 mA
≤ 80 mV ≤ 200 mV ≤ 500 mV ≤ 750 mV
≤ 340 mA ≤ 140 mA ≤ 60 mA ≤ 40 mA
N8921A/
N8941A
0 - 200 V
0 - 70 A
5 kW
40 mV
375 mV/300 mV
100 mV
105 mA
N8923A/
N8943A
0 - 500 V
0 - 30 A
5 kW
70 mV
350 mV
250 mV
45 mA
N8924A/
N8944A
0 - 750 V
0 - 20 A
5 kW
200 mV
800 mV
375 mV
30 mA
Transient response
Recovery Time:
Settling band:
1
From 20 Hz to 300 kHz for rms noise; from 20 Hz to 20 MHz for peak-to-peak noise
2
Accuracy specifications are warranted at 23°C ±5°C
3
Time to recover to within the settling band following aload change from 10% to 90% of full load
3
≤ 1.5 ms
0.8 V
≤ 1.5 ms
2 V
≤ 1.5 ms
5 V
≤ 1.5 ms
7.5 V
Keysight N8900 Series Operating and Service Guide 13
1 Preliminary Information
Specification 10 kW N8925A/
N8945A
DC Ratings
Voltage:
Current:
Power:
Output ripple & noise
CV rms:
CV peak-to-peak:
Load regulation
Voltage:
Current:
Voltage programming &
measurement accuracy
Current programming &
measurement accuracy
Transient response
Recovery Time:
Settling band:
1
3
2
2
0 - 80 V
0 - 340 A
10 kW
25 mV
320 mV
40 mV
510 mA
≤ 80 mV ≤ 200 mV ≤ 500 mV ≤ 750 mV ≤ 1 V
≤ 680 mA ≤ 280 mA ≤ 120 mA ≤ 80 mA ≤ 60 mA
≤ 1.5 ms
0.8 V
N8926A/
N8946A
0 - 200 V
0 - 140 A
10 kW
40 mV
375 mV/300 mV
100 mV
210 mA
≤ 1.5 ms
2 V
N8928A/
N8948A
0 - 500 V
0 - 60 A
10 kW
70 mV
350 mV
250 mV
90 mA
≤ 1.5 ms
5 V
N8929A/
N8949A
0 - 750 V
0 - 40 A
10 kW
200 mV
800 mV
375 mV
60 mA
≤ 1.5 ms
7.5 V
N8930A/
N8950A
0 - 1000 V
0 - 30 A
10 kW
350 mV
1600 mV
500 mV
53 mA/45 mA
≤ 1.5 ms
10 V
Specification 15 kW N8931A/
N8951A
DC Ratings
Voltage:
Current:
Power:
Output ripple & noise
CV rms:
CV peak-to-peak:
Load regulation
Voltage:
Current:
Voltage programming &
measurement accuracy
Current programming &
measurement accuracy
Transient response
Recovery Time:
Settling band:
1
3
2
2
0 - 80 V
0 - 510 A
15 kW
25 mV
320 mV
40 mV
765 mA
≤ 80 mV ≤ 200 mV ≤ 500 mV ≤ 750 mV ≤ 1.5 V
≤ 1.1 A ≤ 420 mA ≤ 180 mA ≤ 120 mA ≤ 60 mA
≤ 1.5 ms
0.8 V
N8932A/
N8952A
0 - 200 V
0 - 210 A
15 kW
40 mV
375 mV/300 mV
100 mV
315 mA
≤ 1.5 ms
2 V
N8934A/
N8954A
0 - 500 V
0 - 90 A
15 kW
70 mV
350 mV
250 mV
135 mA
≤ 1.5 ms
5 V
N8935A/
N8955A
0 - 750 V
0 - 60 A
15 kW
200 mV
800 mV
375 mV
90 mA
≤ 1.5 ms
7.5 V
N8937A/
N8937APV
N8957A/
N8957APV
0 - 1500 V
0 - 30 A
15 kW
400 mV
2400 mV
750 mV
53 mA/45 mA
≤ 1.5 ms
15 V
1
From 20 Hz to 300 kHz for rms noise; from 20 Hz to 20 MHz for peak-to-peak noise
2
Accuracy specifications are warranted at 23°C ±5°C
3
Time to recover to within the settling band following aload change from 10% to 90% of full load
14 Keysight N8900 Series Operating and Service Guide
Supplemental Characteristics 5 kW
1 Preliminary Information
Characteristic 5 kW N8920A/
N8940A
Voltage programming range
Current programming range
Programming and Measurement
Resolution
Voltage:
Current:
Temperature Coefficient
Voltage:
Current:
Output response time
Up, full load:
Down, full load:
Down, no load:
Over-voltage protect range 0 to 88 V 0 to 220 V 0 to 550 V 0 to 825 V
Remote sense compensation per
load lead
Source regulation
Voltage:
Current:
1
2
3
0 to 81.6 V
0 to 173.4 A
4 mV
7 mA
4 mV
8.5 mA
≤ 30 ms
≤ 80 ms
≤ 30 s
2 V 5 V 10 V 18 V
16 mV
85 mA
N8921A/
N8941A
0 to 204 V
0 to 71.4 A
9 mV
3 mA
10 mV
3.5 mA
≤ 30 ms
≤ 80 ms
≤10 s
40 mV
35 mA
N8923A/
N8943A
0 to 510 V
0 to 30.6 A
21 mV
2 mA
25 mV
1.5 mA
≤ 30 ms
≤ 80 ms
≤10 s
100 mV
15 mA
N8924A/
N8944A
0 to 765 V
0 to 20.4 A
31 mV
1 mA
37.5 mV
1 mA
≤ 30 ms
≤ 80 ms
≤10 s
150 mV
10 mA
CC rms ripple & noise 80 mA 22 mA 16 mA 16 mA
OutputTerminal Isolation
Positive Terminal:
Negative Terminal:
AC Input
Nominal Rating:
Input Range:
Frequency:
Phase:
Input Current:
Max. Inrush Current:
Power Factor:
Efficiency:
Weight ≤18.5 kg (41 lbs) / ≤17 kg (38 lbs)
1
Per °C, at rated voltage andcurrent
2
From 10% to 90% or from 90% to 10% of total voltageexcursion
3
+/-10% of nominal ACinput rating
4
Refer to Manual Updates for additional information
4
Version 2
+ 400 V
± 400 V
87.5%/91.5% 90%/91.5% 91%/93.5% 88%/90%
Version 2
+ 600 V
± 400 V
208/220/230/240 VAC or 400 VAC
± 10 % of nominal rating
45 - 65 Hz
3-phase
L2, L3 - 32 A / L2, L3 - 16 A
41 A / 28 A
> 0.99 at nominal input and rated power
Version 2
+ 1000 V
± 725 V
Version 2
+ 1000 V
± 725 V
Keysight N8900 Series Operating and Service Guide 15
1 Preliminary Information
Supplemental Characteristics 10 kW
Characteristic 10 kW N8925A/
N8945A
Voltage programming range
Current programming range
Programming and Measurement Resolution
Voltage:
Current:
Temperature Coefficient
Voltage:
Current:
Output response time
Up, full load:
Down, full load:
Down, no load:
Over-voltage protect range 0 to 88 V 0 to 220 V 0 to 550 V 0 to 825 V 0 - 1100 V
Remote sense compensation
per load lead
Source regulation
Voltage:
Current:
1
2
3
0 to 81.6 V
0 to 346.8 A
4 mV
14 mA
4 mV
17 mA
≤ 30 ms
≤ 80 ms
≤ 30 s / 40 s
2 V 5 V 10 V 18 V 22 V
16 mV
170 mA
N8926A/
N8946A
0 to 204 V
0 to 142.8 A
9 mV
6 mA
10 mV
7 mA
≤ 30 ms
≤ 80 ms
≤10 s
40 mV
70 mA
N8928A/
N8948A
0 to 510 V
0 to 61.2 A
21 mV
3 mA
25 mV
3 mA
≤ 30 ms
≤ 80 ms
≤10 s
100 mV
30 mA
N8929A/
N8949A
0 to 765 V
0 to 40.8 A
31 mV
2 mA
37.5 mV
2 mA
≤ 30 ms
≤ 80 ms
≤10 s
150 mV
20 mA
N8930A/
N8950A
0 to 1020 V
0 to 30.6 A
41 mV
2 mA
50 mV
1.5 mA
≤ 30 ms
≤ 80 ms
≤10 s
200 mV
15 mA
CC rms ripple & noise 160 mA 44 mA 32 mA 32 mA 22 mA
OutputTerminal Isolation
Positive Terminal:
Negative Terminal:
AC Input
Nominal Rating:
Input Range:
Frequency:
Phase:
Input Current:
Max. Inrush Current:
Power Factor:
Efficiency:
Weight ≤ 27 kg (60 lbs) / ≤ 25.5 kg (55 lbs)
1
Per °C, at rated voltage andcurrent
2
From 10% to 90% or from 90% to 10% of total voltageexcursion
3
+/-10% of nominal ACinput rating
4
Refer to Manual Updates for additional information
4
Version 2
+ 400 V
± 400 V
87.5%/89.5% 89.5%/91.5% 91%/91% 88%/90% 91%/93.5%
Version 2
+ 600 V
± 400 V
208/220/230/240 VAC or 400 VAC
± 10 % of nominal rating
L1 - 56 A; L2, L3 - 32 A / L1 - 28 A; L2, L3 - 16 A
> 0.99 at nominal input and rated power
Version 2
+ 1000 V
± 725 V
45 - 65 Hz
3-phase
97 A / 49 A
Version 2
+ 1000 V
± 725 V
Version 2
+ 1000 V
± 725 V
16 Keysight N8900 Series Operating and Service Guide
Supplemental Characteristics 15 kW
1 Preliminary Information
Characteristic 15 kW N8931A/
N8951A
Voltage programming range
Current programming range
Programming and Measurement Resolution
Voltage:
Current:
Temperature Coefficient
Voltage:
Current:
Output response time
Up, full load:
Down, full load:
Down, no load:
Over-voltage protect range 0 to 88 V 0 to 220 V 0 to 550 V 0 to 825 V 0 - 1650 V
Remote sense compensation
per load lead
Source regulation
Voltage:
Current:
1
2
3
0 to 81.6 V
0 to 520.2 A
4 mV
21 mA
4 mV
25.5 mA
≤ 30 ms
≤ 80 ms
≤ 30 s
2 V 5 V 10 V 18 V 30 V
16 mV
255 mA
N8932A/
N8952A
0 to 204 V
0 to 214.2 A
9 mV
9 mA
10 mV
10.5 mA
≤ 30 ms
≤ 80 ms
≤10 s
40 mV
105 mA
N8934A/
N8954A
0 to 510 V
0 to 91.8 A
21 mV
4 mA
25 mV
4.5 mA
≤ 30 ms
≤ 80 ms
≤10 s
100 mV
45 mA
N8935A/
N8955A
0 to 765 V
0 to 61.2 A
31 mV
3 mA
37.5 mV
3 mA
≤ 30 ms
≤ 80 ms
≤10 s
150 mV
30 mA
N8937A/
N8937APV
N8957A/
N8957APV
0 to 1530 V
0 to 30.6 A
61 mV
2 mA
75 mV
1.5 mA
≤ 30 ms
≤ 80 ms
≤10 s
300 mV
15 mA
CC rms ripple & noise 240 mA 66 mA 48 mA 48 mA 26 mA
OutputTerminal Isolation
Positive Terminal:
Negative Terminal:
AC Input
Nominal Rating:
Input Range:
Frequency:
Phase:
Input Current:
Max. Inrush Current:
Power Factor:
Efficiency:
Weight ≤ 35.5 kg (78 lbs) / ≤ 32 kg (70 lbs)
1
Per °C, at rated voltage andcurrent
2
From 10% to 90% or from 90% to 10% of total voltageexcursion
3
+/-10% of nominal ACinput rating
4
Refer to Manual Updates for additional information
4
Version 2
+ 400 V
± 400 V
87.5%/89.5% 89.5%/91.5% 91%/93.5% 88%/90% 91%/93%
Version 2
+ 600 V
± 400 V
208/220/230/240 VAC or 400 VAC
± 10 % of nominal rating
L1, L2, L3 - 56 A / L1, L2, L3 - 28 A
> 0.99 at nominal input and rated power
Version 2
+ 1000 V
± 725 V
45 - 65 Hz
3-phase
97 A / 49 A
Version 2
+ 1000 V
± 725 V
Version 3
+ 1500 V
± 1000 V
Keysight N8900 Series Operating and Service Guide 17
1 Preliminary Information
Common Characteristics
Characteristic All Models
Command Response Time: < 25 ms
Savable States: 10
Analog Programming
Input range:
Accuracy:
Input impedance:
Computer Interfaces
LXI Core 2011:
USB:
GPIB:
Language:
0 to 5 V or 0 to 10 V (selectable)
Specified instrument accuracy ±0.2% of rating
150 kΩ (referenced to ground)
10/100 Base-T Ethernet (Sockets, VXI-11 protocol, Web user interface)
USB 2.0 (USB-TMC488)
GPIB IEEE 488
SCPI - 1993, IEEE 488.2 compliant
Regulatory Compliance:
EMC:
Safety:
Environmental
Operating environment:
Temperature range:
Relative humidity:
Altitude:
Storage temperature:
Acoustic Noise - 5 kW models
At maximum fan speed:
At idle:
Acoustic Noise - 10 kW models
At maximum fan speed:
At idle:
Acoustic Noise - 15 kW models
At maximum fan speed:
At idle:
Complies with European EMC Directive for test and measurement products
Complies with Australian standard and carries C-Tick mark
This ISM device complies with Canadian ICES-001
Cet appareil ISM est conforme à la norme NMB-001 du Canada
Complies with European Low Voltage Directive and carries the CE-marking.
Conforms to US and Canadian safety regulations.
Not applicable for IT mains supply systems
Indoor use, installation category II (for AC input), pollution degree 2
0°C to 45°C
80% or less (non-condensing)
Up to 2000 meters
-20°C to 70°C
76 dBA max. for 208 VAC input; 57 dBA max. for 400 VAC input
55 dBA max. for 208 VAC input; 48 dBA max. for 400 VAC input
77 dBA max. for 208 VAC input; 62 dBA max. for 400 VAC input
55 dBA max. for 208 VAC input; 51 dBA max. for 400 VAC input
79 dBA max. for 208 VAC input; 72.6 dBA max. for 400 VAC input
56 dBA max. for 208 VAC input; 52 dBA max. for 400 VAC input
18 Keysight N8900 Series Operating and Service Guide
Autoranging Characteristics
1 Preliminary Information
5 kW
Models
V1 80 V 200 V 500 V 750 V
I1 62.5 A 25 A 10 A 6.667 A
V2 29.4 V 71.43 V 166.67 V 250 V
I2 170 A 70 A 30 A 20 A
10 kW
Models
V1 80 V 200 V 500 V 750 V 1000 V
I1 125 A 50 A 20 A 13.33 A 10 A
V2 29.4 V 71.43 V 166.67 V 250 V 333.33 V
I2 340 A 140 A 60 A 40 A 30 A
15 kW
Models
N8920A
N8940A
N8925A
N8945A
N8931A
N8951A
N8921A
N8941A
N8926A
N8946A
N8932A
N8952A
N8923A
N8943A
N8928A
N8948A
N8934A
N8954A
N8924A
N8944A
N8929A
N8949A
N8935A
N8955A
N8930A
N8950A
N8937A
N8937APV
N8957A
N8957APV
V1 80 V 200 V 500 V 750 V 1500 V
I1 187.5 A 75 A 30 A 20 A 10 A
V2 29.4 V 71.43 V 166.67 V 250 V 500 V
I2 510 A 210 A 90 A 60 A 30 A
Keysight N8900 Series Operating and Service Guide 19
1 Preliminary Information
Dimension Diagrams
20 Keysight N8900 Series Operating and Service Guide
Keysight N8900 Series Operating and Service Guide
2 Operating Information
Introduction to the Instrument
Front Panel Menu
Installing the Instrument
Getting Started
Remote Interface Configuration
Using the Power Supply
2 Operating Information
Introduction to the Instrument
Front Panel at a Glance
Front Panel Display at a Glance
Front Panel Keys at a Glance
Rear Panel at a Glance
The Keysight N8900 Series is a family of autoranging system DC power supplies with performance and
features that are optimized for automated test systems. They are available in power levels of 5 kW, 10
kW, and 15 kW. Voltage levels range from 80 to 1500 V. Current levels range from 20 to 510 A.
Keysight N8937APV and N8957APV models simulate the output characteristics of a photovoltaic
array. This capability lets you quickly and comprehensively test solar inverter maximum power point
tracking (MPPT) algorithms and inverter efficiency. The SAS Curve Generator software is a free
application that simplifies programming the photovoltaic (PV) models. It is available at
www.keysight.com/find/N8900APVsoftware.
Output and system features that are common to all N8900 Series power supplies are described as
follows. Refer to the Models and Options section for a description of the output ratings of the various
models.
Output features
l Full programming capability is provided for the entire range of output voltage and current
l Paralleling capability for increased output power
l Protection capability includes over-voltage, over-current, over-temperature, and other protections
l Solar array simulator operation - only applies to N8937APV and N8957APV models
Measurement features
l Voltage, current, and power measurements
l Combined output current of paralleled units
System features
l Save and recall up to 10 instrument states in non-volatile memory
l GPIB (IEEE-488), LAN, and USB remote programming interfaces are built in
l Front panel menu setup for GPIB and LANparameters
l LXI Core 2011 compliant, including a built-in Web server
l SCPI (Standard Commands for Programmable Instruments) compatibility
22 Keysight N8900 Series Operating and Service Guide
Front Panel at a Glance
Front Panel Display at a Glance
2 Operating Information
Output voltage and current Displays the actual output voltage and current.
Connection status A = analog programming is enabled
M = the paralleled unit is configured as the master
S = the paralleled unit is configured as a slave
Operating status Indicates one of the following:
OFF = the output is off
CV = the output is in constant voltage mode
CC = the output is in constant current mode
CP = the output is limited by the power limit boundary
OV = the output is disabled by the over-voltage protection
OC = the output is disabled by the over-current protection
OT = the output is disabled by the over-temperature protection
INH = the output is disabled by an external control signal
PF = the output is disabled because of a low voltage on the AC mains
MSP = the output is disabled by the master/slave protection
UNR = the output is unregulated
Voltage and Current settings Displays the programmed voltage and current settings.
Keysight N8900 Series Operating and Service Guide 23
2 Operating Information
Interface status Indicates the following remote interface activity:
Err = an error has occurred (press Error key to display error message)
Lan = the LAN is connected and has been configured
IO = there is activity on one of the remote interfaces
Front Panel Keys at a Glance
The AC line switch turns the unit on or off (off = 0). The indicator
above the On/Off switch shows the display status. Green indicates
normal operation. Amber indicates that the display is in screen
saver mode. It is also on during the boot-up process. Press any key
to exit screen saver mode.
The system keys access the following front panel meter and
command menus:
Meter returns the display to metering mode. Repeatedly press this
key to cycle through the following measurement functions:
Voltage, Current
Voltage, Power
Voltage, Current, Power
Menu accesses the command menu.
Function key is reserved for future use.
Back backs out of a menu without activating any changes.
Help accesses information about the displayed menu control.
Error displays any error messages in the error queue.
The navigation keys do the following:
Arrows let you move around in the command menus.
Select lets you make a selection in the command menus. It also lets
you enter edit mode for editing the numeric parameters.
The output keys do the following:
On/Off enables or disables the output.
Voltage lets you change the voltage setting.
Current lets you change the current setting.
The numeric entry keys do the following:
The 0 through 9 keys enter numbers.
The (.) key is the decimal point.
The – key is used to enter a minus sign.
The up/down arrow keys increment or decrement voltage or current
settings.They also select letters in alphabetic entry fields.
The E key enters an exponent. Add the value to the right of the E.
The back arrow key deletes digits as it backspaces over them.
The Enter key enters a value. If you exit a field without pressing the
Enter key, the value is ignored.
24 Keysight N8900 Series Operating and Service Guide
Rear Panel at a Glance
2 Operating Information
GPIB GPIB interface connector
LAN LAN interface connector
Sharing Current sharing connections - for parallel operation
+/–Sense Remote sense connections (if not used, local sensing is internally connected)
–Output; +Output Negative and positive output terminals
AC input AC line input
USB USB interface connector
Analog External control signal connector
Master/Slave (Group) Master/slave connectors - for grouping paralleled units
For electrical shock protection, always connect the AC input earth ground terminal.
Keysight N8900 Series Operating and Service Guide 25
2 Operating Information
Front Panel Menu
This is an overview of the front-panel menus. For a brief tutorial, refer to Use the front panel menu.
Press the Menu key to access the front panel menus.
1st Menu
Level
Output Fixed
Transient Mode Selects voltage and current transient modes
Protect OVP Configures over-voltage protection settings
States Reset Resets all instrument settings to the reset (*RST) state
2nd Level 3rd & 4th
Levels
1
1
SAS
Mode Selects the operating mode: Fixed, Curve. or Table
Step Programs the voltage and current step settings
OCP Configures over-current protection settings
Clear Clears protection conditions and displays output status
Voltage Programs the output voltage settings
Current Programs the output current settings
1
Curve
1
Scale
Description
Programs the SAS curve parameters: Imp, Isc, Vmp, and
Voc
Selects a scale factor for the current and voltage curves
SaveRecall Saves and recalls instrument settings
PowerOn Selects the power-on instrument state
System IO LAN Displays LAN commands
Settings View the currently active network settings
Modify Modifies the network configuration
Apply Applies the configuration changes and restarts
Cancel Cancels the configuration changes
Reset Performs an LXI LCI reset of LANsettings and restarts
Defaults Resets the network to the as-shipped defaults and restarts
USB Displays USB identification string
GPIB Display or change the GPIB address
Analog Sets the analog interface amplitude (5 V or 10 V)
1
Only applies to Models N8737APV and N8957APV.
26 Keysight N8900 Series Operating and Service Guide
2 Operating Information
1st Menu
Level
System Group Function Defines the function of each unit in the paralleled group
2nd Level 3rd & 4th
Levels
Master Displays the configured slave addresses
Slave Specifies the slave address
Preferences Display Configures the screen saver and wake on IO timer
Admin Login/Logout Enter a password to access the Admin functions
Cal Displays calibration commands
Voltage Calibrates voltage programming and measurement
Current Calibrates current programming and measurement
Count View the calibration count
Date View and modify the calibration date
Save Saves the calibration data
IO Enables/disable the LAN, USB, and GPIB
Description
Sanitize Performs NISPOM secure erase of all user data
Update Password protect firmware update
Password Changes the admin password
About Displays model, output ratings, serial number, and firm-
ware
Keysight N8900 Series Operating and Service Guide 27
2 Operating Information
Installing the Instrument
Before Installation or Use
AC Mains Connections
Single Unit Connections
Multiple Unit Connections
External Control Signal Connections (Analog)
Interface Connections
28 Keysight N8900 Series Operating and Service Guide
2 Operating Information
Before Installation or Use
Inspect the Unit
When you receive your power supply, 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 power supply, save the shipping carton and packing materials in case
the unit has to be returned. Check the list below and verify that you have received these items with
your unit. If anything is missing, please contact your nearest Keysight Sales and Support Office.
Check for Items Supplied
Before getting started, check the following list and verify that you have received these items with your
unit. If anything is missing, please contact your nearest Keysight Sales and Support Office.
Item Description Part Number
DC covers Safety covers for DC output terminals 5003-2051
Sense cover Safety covers for sense terminals (≥750 V units) 5066-1913
2 position plug Connector plug for Sharing terminals 5003-2038
4 position plug Connector plug for Sense terminals (≤500 V units) 5003-2037
4 position plug Connector plug for Sense terminals (≥750 V units) 0360-3120
AC plug Connector plug for AC input 5003-2053 for 400 VAC inputs
5003-2091 for 208 VAC inputs
Hardware Kit 1-set mounting hardware for low current terminals
1-set mounting hardware for high current terminals
5003-2089 for ≥ 500 VAC outputs
5003-2090 for < 500 VAC outputs
Review Safety Information
This power supply is a Safety Class 1 instrument, which means it has a protective earth terminal. That
terminal must be connected to earth ground through a power source equipped with an earth ground.
Refer to the Safety Notices section at the beginning of this guide for general safety information. Before
installation or operation, check the power supply and review this guide for safety warnings and
instructions. Safety warnings for specific procedures are located at appropriate places throughout this
guide.
Keysight N8900 Series Operating and Service Guide 29
2 Operating Information
Observe Environmental Conditions
Do not operate the instrument in the presence of flammable gases or fumes.
The environmental conditions of the power supply are documented under Specifications. Basically,
the unit should only be operated indoors in a controlled environment. Do not operate the unit in areas
where the ambient temperature exceeds +45 degrees Celsius. This applies for rack-mounting as well
as for bench use.
Use Caution when Transporting the Unit
Two people are required when handling units. Because of the unit’s weight, do not lift or
move it alone. Moving by hand should be avoided where possible. If unavoidable, lift
only the instrument’s chassis; do not lift the unit using the exterior handles, knobs, or
output terminals.
Provide Adequate Air Flow
Do not block the air intake at the front, or the exhaust at the rear of the unit.
The dimensions of your power supply, an outline diagram, and airflow direction are given under
Dimension Diagrams. Fans cool the power supply by drawing air through the front and exhausting it
out the back. Allows at least 8 inches (20 cm) of space at the front and back of the unit for adequate air
circulation.
30 Keysight N8900 Series Operating and Service Guide
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