Triple Output Power Supply
Keysight Model E3630A
Operating and
Service Manual
Notices
CAUTION
WARNING
Copyright Notice
© Keysight Technologies 2002 - 2019
No part of this manual may be repro-
duced 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
5959-5329
Edition
Edition 13, January 2019
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
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.
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. You can then search by
product number to find the latest Declaration of Conformity.
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, mod ify, reprod uce, 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.
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.
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 CAUTION notice 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.
2 Keysight E3630A Operating and Service Manual
Certification
Warranty
Keysight Technologies certifies that this product met its published specifications
at time of shipment from the factory. Keysight Technologies further certifies that
its calibration measurements are traceable to the United States National Institute
of Standards and Technology (formerly National Bureau of Standards), to the
extent allowed by that organization's calibration facility, and to the calibration
facilities of other International Standards Organization members.
This Keysight Technologies hardware product is warranted against defects in
material and workmanship for a period of 3 years from date of delivery. Keysight
software and firmware products, which are designated by Keysight for use with a
hardware product and when properly installed on that hardware product, are
warranted not to fail to execute their programming instructions due to defects in
material and workmanship for a period of 90 days from date of delivery. During
the warranty period, either Keysight or Keysight Technologies will, at its option,
either repair or replace products which prove to be defective. Keysight does not
warrant that operation the software, firmware, or hardware shall be uninterrupted
or error free.
For warranty service, with the exception of warranty options, this product must be
returned to the nearest sevice center designated by Keysight. Customer shall
prepay shipping charges by (and shall pay all duty and taxes) for products
returned to Keysight for warranty service. Except for the products returned to
Customer from another country, Keysight shall pay for return of products to
Customer. Warranty services outside the country of initial purchase are included
in Keysight's product price, only if Customer pays Keysight international prices
(defined as destination local currency price, or U.S. or Geneva Export price).
If Keysight is unable, within a reasonable time, to repair or replace any product to
condition as warranted, the Customer shall be entitled to a refund of the purchase
price upon return of the product to Keysight.
The warranty period begins on the date of delivery or on the date of installation if
installed by Keysight.
Keysight E3630A Operating and Service Manual 3
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or
inadequate maintenance by the Customer, Customer- supplied software or
interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation and
maintenance. TO THE EXTENT ALLOWED BY LOCAL LAW, NO OTHER
WARRANTY IS EXPRESSED OR IMPLIED. AND KEYSIGHT SPECIFICALLY
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.
For consumer transactions in Australia and New Zealand:
The warranty terms contained in this statement, except to the extent lawfully
permitted, do not exclude, restrict or modify and are in addition to the mandatory
rights applicable to the sale of this product to you.
Exclusive Remedies
TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES PROVIDED HEREIN
ARE THE CUSTOMER'S SOLE AND EXCLUSIVE REMEDIES. KEYSIGHT SHALL
NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY
OTHER LEGAL THEORY.
Assistance
The above statements apply only to the standard product warranty. Warranty
options, extended support contacts, product maintenance agreements and
customer assistance agreements are also available. Contact your nearest Keysight
Technologies Sales and Service office for further information on Keysight's full line
of Support Programs.
4 Keysight E3630A Operating and Service Manual
Safety Symbols
The following symbols on the instrument and in the documentation indicate
precautions which must be taken to maintain safe operation of the instrument.
Alternating current (AC) Frame or chassis (ground) terminal
Direct current (DC)
In position of a bi-stable push control Protective earth (ground) terminal
Out position of a bi-stable push control Earth (ground) terminal
Positive binding post Negative binding post
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Keysight E3630A Operating and Service Manual 5
Safety Considerations
WARNING
WARNING
WARNING
Read the information below before using this instrument.
The following general safety precautions must be observed during all phases 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 for design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer’s failure to comply with these
requirements.
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 operation instructions.
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage and that the
correct fuse is installed.
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 cabinet
must be connected to an electrical ground. The instrument must be
connected to the AC power supply 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 d isconnection of the protective earth terminal will cause a
potential shock hazard that could result in personal injury. If the instrument
is to be energized via an external autotransformer for voltage reduction, be
certain that the autotransformer common terminal is connected to the
neutral (earthed pole) of the AC power lines (supply mains).
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.
Do not operate the instrument in the presence of flammable gases or fumes.
6 Keysight E3630A Operating and Service Manual
WARNING
KEEP AWAY FROM LIVE CIRCUIT
WARNING
WARNING
Operating personnel must not remove instrument covers. Component
replacement and internal adjustments must be made by qualified service
personnel. Do not replace components with power cable connected. Under
certain conditions, dangerous voltages may exist even with the power cable
removed. To avoid injuries, always disconnect power, discharge circuits and
remove external voltage sources before touching components.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person,
capable of rendering first aid and resuscitation, is present.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.
Because of the danger of introducing add itional 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.
Keysight E3630A Operating and Service Manual 7
Instruments that appear damaged or defective should be made inoperative and
secured against unintended operation until they can be repaired by qualified
service personnel.
Regulatory Markings
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.
The RCM mark is a registered
trademark of the Australian
Communications and Media Authority.
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.
This instrument complies with the
WEEE Directive (2002/96/EC) marking
requirement. This affixed product label
indicates that you must not discard
this electrical or electronic product in
domestic household waste.
The CSA mark is a registered
trademark of the Canadian
Standards Association.
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.
ICES/NMB-001 indicates that this ISM
device complies with the
Canadian ICES-001.
Cet appareil ISM est conforme a la
norme NMB-001 du Canada.
8 Keysight E3630A Operating and Service Manual
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/ 96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard this
electrical or electronic product in domestic household waste.
Product category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
– www.keysight.com/find/powersupply
(product-specific information and support, software and
documentation updates)
– www.keysight.com/find/assist
(worldwide contact information for repair and service)
Keysight E3630A Operating and Service Manual 9
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10 Keysight E3630A Operating and Service Manual
Table of Contents
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Limitation of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Exclusive Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/
EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
1 General Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Safety and EMC Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Instrument And Manual Identification . . . . . . . . . . . . . . . . . . . . . . . . . .21
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Line fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2Installation
Keysight E3630A Operating and Service Manual 11
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Mechanical check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electrical check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Installation Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Location and cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Outline diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Rack mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Input Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Power cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3 Operating Instructions
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Turn-On Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Connecting load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Parallel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Series operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4 Load Considerations
Pulse Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reverse Current Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Output Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reverse Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5Service Information
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
General Measurement Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Connecting measuring devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Selecting load resistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Electronic load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Output current measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
12 Keysight E3630A Operating and Service Manual
Rated output, tracking, meter accuracy, and current limit . . . . . . .39
Load regulation (load effect) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Line regulation (source effect) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Ripple and noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
RMS measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Peak-to-peak measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Common mode current (CMI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Load transient response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Stability (Drift) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Open fuse troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Adjustment And Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Current limit adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Meter calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
6 Component Locator Diagrams
Main Board — Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Main Board — Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Display Controller — Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Display Controller — Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
7-Segment — Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
7-Segment — Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Keysight E3630A Operating and Service Manual 13
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14 Keysight E3630A Operating and Service Manual
List of Figures
Figure 2-1 Outline diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 3-1 Front-panel controls and indicators . . . . . . . . . . . . . .32
Figure 3-2 Current limit characteristic of the 6V supply . . . . . . . .36
Figure 4-1 Reverse current loading solution . . . . . . . . . . . . . . . . .31
Figure 5-1 Line voltage selector (set for 115 VAC) . . . . . . . . . . . .36
Figure 5-2 Front panel terminal connections . . . . . . . . . . . . . . . .38
Figure 5-3 Current sampling resistor connections . . . . . . . . . . . .39
Figure 5-4 Output current, test set up . . . . . . . . . . . . . . . . . . . . .42
Figure 5-5 Basic test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Figure 5-6 Ripple and noise rms measurement test setup . . . . . .45
Figure 5-7 Load transient response time waveform . . . . . . . . . . .47
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16 Keysight E3630A Operating and Service Manual
List of Tables
Table 1-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Table 5-1 Test equipment required . . . . . . . . . . . . . . . . . . . . . . .34
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18 Keysight E3630A Operating and Service Manual
Keysight E3630A Triple Output Power Supply
Operating and Service Manual
1 General Information
Introduction 20
Safety Considerations 20
Safety and EMC Requirements 20
Instrument And Manual Identification 21
Options 21
Accessory 21
Description 22
Specifications 24
19
1General Information
Introduction
This section contains general information concerning the E3630A triple output
power supply. Included are safety considerations, safety and EMC requirements,
instrument and manual identification, option and accessory information,
instrument description, and specifications.
Safety Considerations
This product is a Safety Class I instrument, which means that it is provided with a
protective earth ground terminal. This terminal must be connected to an AC
source that has a 3-wire ground receptacle. Review the instrument rear panel and
this manual for safety markings and instructions before operating the instrument.
Refer to the Safety Summary page at the beginning of this manual for a summary
of general safety information. Specific safety information is located at the
appropriate places in this manual.
Safety and EMC Requirements
This power supply is designed to comply with the following safety and EMC
(Electromagnetic Compatibility) requirements.
Safety
– IEC 61010-1:2010 / EN 61010-1:2010
– CAN/CSA-C22.2 No. 61010.1-12
EMC
– IEC 61326-1:2005/EN61326-1:2006
– CISPR11:2003/EN55011:2007
– Canada: ICES/NMB-001:Issue 4, June 2006 Australia/New Zealand: AS/NZS
CISPR 11:2004
20 Keysight E3630A Operating and Service Manual
Instrument And Manual Identification
A serial number identifies your power supply. The serial number encodes the
country of manufacture, the week of the latest significant design change, and a
unique sequential number. The letter “KR” or “MY” designates Korea or Malaysia
as the country of manufacture respectively. For Korea the first one digit indicates
the year (3=1993, 4=1994, and so forth), and the second two digits indicate the
week. For Malaysia, the first two digits indicate Keysight year and the second two
digits indicate the work-week. The remaining digits of the serial number are a
unique, five-digit number (Korea) or four-digit number (Malaysia) assigned
sequentially.
If a yellow Change Sheet is supplied with this manual, its purpose is to explain any
differences between your instrument and the instrument described in this manual.
The Change Sheet may also contain information for correcting errors in the
manual.
Options
General Information 1
Options 0EM, 0E3, and 0E9 determine which line voltage is selected at the
factory. The standard unit is configured for 115 VAC ± 10%, 47- 63 Hz input.
Option no. Description
0EM 115 VAC ± 10%, 47-63 Hz Input
0E3 230 VAC ± 10%, 47-63 Hz Input
0E9 100 VAC ± 10%, 47-63 Hz Input
Accessory
The accessory listed below may be ordered from your local Keysight Technologies
Sales Office either with the power supply or separately. (Refer “Sales and
Technical Support” on page 9 for more information.)
Keysight E3630A Operating and Service Manual 21
1General Information
Keysight part no. Description
5063-9767
The rack mount kit is needed for rack mounting of the E3630A power supply.
Description
This constant-voltage/current-limiting triple output power supply combines two
0 to ±20 V tracking outputs rated at 0.5 amps with an additional single output
that is rated at 0 to 6 volts and 2.5 amps. The +20 V and –20 V tracking outputs
can also be used in series as a single 0 to 40 V 0.5-amp output. Connections to
the supply's output and to chassis ground are made to binding posts on the front
panel. The supply's three outputs share a common output terminal, which is
isolated from chassis ground so that any one output terminal can be grounded.
All outputs are protected against overload and short-circuit damage. The ±20 V
outputs are protected by circuits that limit the output current to 110% of its
nominal maximum. The overload protection circuit for the +6 V output has a
current foldback characteristic that reduces the output current as an overload
increases until only 1 amp flows through a short circuit. The 6 V output current
limit depends on the output terminal voltage and varies linearly between
2.75 amps at 6 volts and 1 amp at zero volts.
All controls, digital meter, and output terminals are located on the front panel.
One voltage control sets the 0 to 6 V and another sets the voltages of the 0 to
+20 V and 0 to –20 V outputs simultaneously.These dual tracking outputs are
made more versatile by providing a tracking ratio control in addition to the usual
voltage control. With the tracking ratio control turned fully clockwise to its "fixed"
position, the dual outputs have a fixed 1:1 tracking ratio. As the ±20 V voltage
control is adjusted, the voltage of the negative supply tracks the positive output
within ±1%. Turning the tracking ratio control away from its fully clockwise
position switches the dual tracking outputs into a variable tracking ratio mode. In
this mode the voltage of the negative output can be set lower than that of the
positive output. The tracking ratio control allows the negative supply's output to
be set to any value between a maximum that is within ±5% of the positive supply's
output and a minimum that is less than 0.5 volts.
Rack Kit for mounting one or two 3 1/2" high supplies in a
standard 19" rack
22 Keysight E3630A Operating and Service Manual
Once a ratio is established by the tracking ratio control, the ratio of the positive
output voltage to the negative output voltage remains constant as the ±20 V
voltage control varies the 0 to +20 V output over its range.
The front panel also contains a line switch, three overload indicators for +6 V
output, +20 V output, and –20 V output, a voltmeter and an ammeter, and three
push-button meter switches. The push buttons select one of the supply's three
outputs for display. The voltmeter and ammeter always monitor any one supply
simultaneously. In addition to the standard 115 VAC ± 10% 47 to 63 Hz input, two
other line voltage options are available for nominal inputs of 100 and 230 VAC.
The supply is furnished with a detachable 3-wire grounding type line cord. The AC
line fuse is in an extractor type fuseholder on the rear heat sink.
Line fuse
The line fuse is located by the AC line receptacle. Check the rating of the line fuse
and replace it with the correct fuse if necessary as indicated below. These are
slow-blow fuses.
General Information 1
Line voltage Fuse Keysight part no.
100/115 VAC 1.6 A 2110-0918
230 VAC 1.0 A 2110-0599
Keysight E3630A Operating and Service Manual 23
1General Information
Specifications
Table 1-1 lists detailed specifications for the power supply.
Tab le 1-1 Specifications
Item Specifications
Warranted specifications
– —0 to ±20 V outputs: Maximum rated output current is 0.5 A. Short circuit output current is
0.55 A ± 5% and a fixed current limit circuit limits the output of each supply to this maximum at any
DC output and
overload protection
Load regulation All outputs: Less than 0.01% plus 2 mV for a full load to no load change in output current.
Line regulation All outputs: Less than 0.01% plus 2 mV for any line voltage change within rating.
Tracking accuracy
PARD (ripple and
noise)
Operating temperature
range
Operating altitude Up to 2000 m
Storage temperature
range
Humidity Up to 80% RH
Load transient
response time
Meter accuracy: ± (0.5% of output + 2 counts) at 25 °C ± 5 °C
output voltage setting. Unbalanced loads within current rating are permitted.
– —0 to +6 V output: Maximum rated output current is 2.5 A at 6 V. The maximum available output
current decreases with the output voltage setting. A current foldback circuit limits the output to
2.75 A ±5% at 6 volts and, with decreasing voltage, reduces the current limit linearly to 1 A ±15% at
zero volts (short circuited).
The +20 V and –20 V outputs track within 1% with the TRACKING ratio control in the Fixed position. (In
variable tracking ratio mode, the negative tracking output can be adjusted from less than 0.5 V to
within ±5% of the setting of the positive output.)
– All outputs: less than 0.35 mV rms/1.5 mV p-p (20 Hz-20 MHz).
–Common Mode Current (CMI): Less than 1 mA for all outputs (20 Hz-20 MHz)
0 to 40 °C for full rated output. At higher temperatures, output current is derated linearly to 50% at
55 °C maximum temperature.
-20 °C to 70 °C
All outputs: less than 50 msec for output recovery to within 15 mV of nominal output voltage following
a load change from full load to half load, or vice versa.
Meter resolution All output: Voltage 10 mV, Current 10 mA
24 Keysight E3630A Operating and Service Manual
Item Specifications
Typical (supplemental) specifications
General Information 1
Temperature
coefficient
Stability (output drift)
Output voltage
overshoot
General specifications
AC input
Dimensions
Weight 3.8 kg (8.4 lbs) net, 5.1 kg (11.3 lbs) shipping
All outputs: Less than 0.02% plus 1 mV voltage change per °C over the operating range from 0 to
40 °C after 30 minutes warm-up.
All outputs: Less than 0.1% plus 5 mV (DC to 20 Hz) during 8 hours at constant line, load and ambient
after an initial warm-up time of 30 minutes.
All outputs: During turn-on or turn-off of AC power, output plus overshoot will not exceed 1 V if the
output control is set for less than 1 V. If the control is set for 1 V or higher, there is no overshoot.
– OEM:115 VAC ± 10%, 47-63 Hz, 115 VA, 84 W
– OE9:100 VAC ± 10%, 47-63 Hz, 115 VA, 84 W
– OE3:230 VAC ± 10%, 47-63 Hz, 115 VA, 84 W
212.3 mmW x 88.1 mmH x 269.2 mmD
(8.354 inW x 3.469 inH x 10.591 inD)
This instrument is intended for indoor use.
Keysight E3630A Operating and Service Manual 25
1General Information
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26 Keysight E3630A Operating and Service Manual
Keysight E3630A Triple Output Power Supply
Operating and Service Manual
2 Installation
Initial Inspection 28
Installation Data 29
Input Power Requirements 29
27
2Installation
Initial Inspection
Before shipment, this instrument was inspected and found to be free of
mechanical and electrical defects. As soon as the instrument is unpacked, inspect
for any damage that may have occurred in transit. Save all packing materials until
the inspection is completed. If damage is found, a claim should be filed with the
carrier. The Keysight Technologies Sales and Service office should be notified as
soon as possible.
Mechanical check
This check should confirm that there are no broken knobs or connectors, that the
cabinet and panel surfaces are free of dents and scratches, and that the meter is
not scratched or cracked.
Electrical check
Perform the Turn-On Checkout Procedure in the following paragraph to confirm
that the supply is operational. Alternately, check the supply more fully using the
Performance Tests in the service information section.
28 Keysight E3630A Operating and Service Manual
Installation Data
The instrument is shipped ready for bench operation. Before applying power to
the supply, please read the Input Power Requirements paragraph.
Location and cooling
This instrument is air cooled. Sufficient space should be allowed so that a free
flow of cooling air can reach the sides and rear of the instrument when it is in
operation. It should be used in an area where the ambient temperature does not
exceed 40 °C.
Outline diagram
Figure 2-1 illustrates the outline shape and dimensions of the supply.
Rack mounting
This supply may be rack mounted in a standard 19-inch rack panel either by itself
or alongside a similar unit. Please see the “Accessory” on page 21, for available
rack mounting accessory. The rack-mounting kit includes complete installation
instructions.
Installation 2
Input Power Requirements
Depending on the line voltage option ordered, the supply is ready to be operated
from one of the power sources listed in Table 1-1. A label on the rear heat sink
shows the nominal input voltage set for the supply at the factory.
Power cable
To protect operating personnel, the supply should be grounded. This supply is
equipped with a three conductor power cable. The third conductor is the ground
conductor and when the cable is plugged into an appropriate receptacle, the
supply is grounded.
Keysight E3630A Operating and Service Manual 29
2Installation
The power supply is equipped at the factory with a power cord plug appropriate
for the user's location. Notify the nearest Keysight Sales and Service Office if the
appropriate power cord is not included with the supply.
Figure 2-1 Outline diagram
30 Keysight E3630A Operating and Service Manual
Keysight E3630A Triple Output Power Supply
Operating and Service Manual
3 Operating Instructions
Introduction 32
Turn-On Checkout Procedure 33
31
3 Operating Instructions
5 6 7
1 2 3 4 8 9 10 11 12
Introduction
The following steps describe the use of the front panel controls and indicators
illustrated in Figure 3-1 and serve as a brief check that the supply is operational.
Follow this checkout procedure or the more detailed performance test of service
information section when the instrument is received and before it is connected to
any load equipment.
Figure 3-1 Front-panel controls and indicators
32 Keysight E3630A Operating and Service Manual
CAUTION
Before applying power to the supply, check the label on the heat sink to
1258937
6
6
10
9
make certain that the supply's line voltage option agrees with the line
voltage to be used. If the option does not correspond to your line voltage,
refer to paragraph Line voltage option conversion in the service section
before applying power.
Turn-On Checkout Procedure
1 Connect line cord to power source and turn LINE switch on.
2 Push +6V METER switch and, with no load connected, vary +6 V VOLTAGE
control over its range and check that the voltmeter responds to the control
setting and the ammeter indicates zero.
3 Set the +6V VOLTAGE control to 6 volts and short the +6 V output terminal
to COM (common) terminal with an insulated test lead. The ammeter
should indicate a short-circuit output current of approximately 1.0 A. Remove
the short from the output terminals.
Operating Instructions 3
4 Push the +20 V METER switch and turn Tracking Ratio control fully
clockwise to the Fixed position. With no load connected, vary ±20 V VOLTAGE
control over its range and check that the voltmeter responds to the control
setting and the ammeter indicates zero.
5 Set the ±20 V VOLTAGE control to 20 volts and short the +20 V output
terminal to the COM terminal with an insulated test lead. The
ammeter should indicate a short-circuit output current of 0.55 A ± 5%.
Remove the short from the output terminals.
6 Repeat steps (4) and (5) for –20 V output.
7 Adjust the +20 V output to 20 volts. Then push –20 V METER switch and check
the effect of the Tracking Ratio control on the voltage of the –20 V output. The
–20 V output should be adjustable from less than 0.5 volts to a maximum of
19 to 21 volts.
Keysight E3630A Operating and Service Manual 33
3 Operating Instructions
12
If this brief checkout procedure or later use of the supply reveals a possible
malfunction, see the service information section for detailed test, troubleshooting,
and adjustment procedures.
Operation
This power supply can be operated individually or in parallel or series with another
supply (see Parallel operation and Series operation paragraphs). All output
terminals are isolated from ground. The ±20 V and +6 V outputs use a single
common output terminal. This common (COM) terminal or any one of the other
output terminals may be grounded to the chassis at the front panel ground
terminal ( in Figure 3-1), or all outputs may be left floating. Loads can be
connected separately between each of the 0 to ±20 V output terminals and the
COM terminal, or between the –20 V and the +20 V terminals for a 0 to 40 V
output. Each output voltage or current can be quickly selected for monitoring with
the push-button meter switches.
To monitor the 0 to 40 V output voltage, add the voltmeter readings of the +20 V
and –20 V output and use either the +20 V or the –20 V meter to measure the
current.
Tracking ratio control
With the Tracking Ratio control in the Fixed position, the voltage of the —20 V
supply tracks that of the +20 V supply within 1% for convenience in varying the
symmetrical voltages needed by operational amplifiers and other circuits using
balanced positive and negative inputs.
Turn the Tracking Ratio control counter clockwise out of the Fixed position to set
the voltage of the –20V supply lower than that of the +20 V supply. The negative
supply can be set from a minimum of less than 0.5 volts to a maximum within 5%
of the +20 V supply's output. Once this is done, the ±20 V voltage control still
controls both outputs and maintains a constant ratio between their voltages.
Overload protection circuits
±20-Volt Current Limit.
protected against overload or short circuit damage by separate current limit
circuits to limit the output current to 0.55 A ± 5%. (This is 110% of the maximum
rated output.) If a single load is connected between the +20 V and –20 V outputs,
the circuit set for the lesser current limit will limit the output. No deterioration of
34 Keysight E3630A Operating and Service Manual
The +20 V and –20 V outputs are individually
Operating Instructions 3
NOTE
supply performance occurs if the output current remains below the current limit
setting.
+6V Current Foldback.
+6 V output reduces the output current limit as the output terminal voltage
decreases. (The operating region of the +6 V output is enclosed by heavy lines in
Figure 4-1) The maximum rated output current is 2.5 A and the current limit is
factory-adjusted to operate at 2.75 A ± 5% when the output is 6 volts. At lower
output voltages, the circuit reduces the maximum obtainable output current
linearly until 1 A ± 15% flows when the output is shorted. The short-circuit current
cannot be adjusted.
During the actual operation of the ±20 V and +6 V outputs, if a load change
causes the current limit to be exceeded, the OL LED is lighted. If overload
conditions occur, the ±20 V supplies will protect the load by limiting the current
to 0.55 A and the +6 V supply will protect the load by reducing both voltage and
current simultaneously along the foldback locus as shown in Figure 4-1. The
±20 V and +6 V supplies are self restoring; that is, when the overload is removed
or corrected, the output voltage is automatically restored to the previously set
value.
The overload and short-circuit protection circuit for the
Operation beyond rated output
The supply may be able to provide voltages and currents greater than its rated
maximum outputs if the line voltage is at or above its nominal value. Operation
can be extended up to 5% over the rated output without damage to the supply,
but performance cannot be guaranteed to meet specifications in this region. If the
line voltage is maintained in the upper end of the input voltage range, however,
the supply probably will operate within its specifications.
Keysight E3630A Operating and Service Manual 35
3 Operating Instructions
Figure 3-2 Current limit characteristic of the 6V supply
Connecting load
Each load should be connected to the power supply output terminals using
separate pairs of connecting wires. This will minimize mutual coupling effects
between loads and takes full advantage of the low output impedance of the
supply. Load wires must be of adequately heavy gauge to maintain satisfactory
regulation at the load.
Each pair of connecting wires should be as short as possible and twisted or
shielded to reduce noise pick-up. If a shield is used, connect one end to the
supply ground terminal and leave the other end unconnected.
If load considerations require locating output power distribution terminals at a
distance from the power supply, then the power supply output terminals should
be connected to the remote distribution terminals by a pair of twisted or shielded
wires and each load should be connected to the remote distribution terminals
separately.
36 Keysight E3630A Operating and Service Manual
Parallel operation
Two or more supplies can be connected in parallel to obtain a total output current
greater than that available from one supply. The total output current is the sum of
the output currents of the individual supplies. The output voltage controls of one
power supply should be set to the desired output voltage, and the other supply
set for a slightly larger output voltage. The supply set to the lower output voltage
will act as a constant voltage source, while the supply set to the higher output will
act as a current-limited source, dropping its output voltage until it equals that of
the other supply. The constant voltage source will deliver only that fraction of its
rated output current necessary to fulfill the total current demand.
Series operation
Series operation of two or more power supplies can be accomplished up to the
output isolation rating of any one supply to obtain a higher voltage than that
available from a single supply. Series connected supplies can be operated with
one load across both supplies or with a separate load for each supply. The power
supply has a reverse polarity diode connected across the output terminals so that
if operated in series with other supplies, damage will not occur if the load is
short-circuited or if one supply is turned on separately from its series partners.
When this connection is used, the output voltage is the sum of the voltages of the
individual supplies. Each of the individual supplies must be adjusted in order to
obtain the total output voltage.
Operating Instructions 3
Keysight E3630A Operating and Service Manual 37
3 Operating Instructions
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38 Keysight E3630A Operating and Service Manual
Keysight E3630A Triple Output Power Supply
Operating and Service Manual
4 Load Considerations
This section provides information on operating your supply with various types of
loads connected to its output.
Pulse Loading 40
Reverse Current Loading 40
Output Capacitance 40
Reverse Voltage Protection 41
39
4 Load Considerations
Pulse Loading
The power supply will automatically cross over from constant-voltage to
current-limit operation in response to an increase in the output current over the
preset limit. Although the preset limit may be set higher than the average output
current, high peak currents (as occur in pulse loading) may exceed the preset
current limit and cause crossover to occur and degrade performance.
Reverse Current Loading
An active load connected to the supply may actually deliver a reverse current to
the supply during a portion of its operating cycle. An external source cannot be
allowed to pump current into the supply without risking loss of regulation and
possible damage to the output capacitor of the supply. To avoid these effects, it is
necessary to preload the supply with a dummy load resistor so that the supply
delivers current through the entire operating cycle of the load devices.
Output Capacitance
An internal capacitor across the output terminals of the supply helps to supply
high-current pulses of short duration during constant-voltage operation. Any
capacitance added externally will improve the pulse current capability, but will
decrease the load protection provided by the current limiting circuit. A
high-current pulse may damage load components before the average output
current is large enough to cause the current limiting circuit to operate.
40 Keysight E3630A Operating and Service Manual
Reverse Voltage Protection
A diode is connected across the output terminals with reverse polarity. This diode
protects the output electrolytic capacitors and the series regulator transistors
from the effects of a reverse voltage applied across the output terminals. Since
series regulator transistors cannot withstand reverse voltage either, diodes are
also connected across them. When operating supplies in parallel, these diodes
protect an unenergized supply that is in parallel with an energized supply.
Load Considerations 4
Figure 4-1 Reverse current loading solution
Keysight E3630A Operating and Service Manual 41
4 Load Considerations
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42 Keysight E3630A Operating and Service Manual
Keysight E3630A Triple Output Power Supply
Operating and Service Manual
5 Service Information
Maintenance 44
Performance Tests 47
General Measurement Techniques 47
Troubleshooting 59
Adjustment And Calibration 60
43
5 Service Information
Maintenance
Introduction
This section provides performance test, troubleshooting information, and
adjustment and calibration procedures. The following operation verification tests
comprise a short procedure to verify that the power supply is performing properly,
without testing all specified parameters.
If a fault is detected in the power supply while making the performance check or
during normal operation, proceed to the troubleshooting procedures. After
troubleshooting, perform any necessary adjustments and calibrations. Before
returning the power supply to normal operation, repeat the performance check to
ensure that the fault has been properly corrected and that no other faults exist.
Test equipment required
The following Table 5 -1 lists the equipment required to perform the various
procedures described in this section.
Tab le 5-1 Test equipment required
Type Required characteristics Use Recommended model
Oscilloscope
RMS voltmeter
Multimeter
Electronic load
Resistive loads (R
)
L
Sensitivity : 100 μV
Bandwidth : 20 MHz/100 MHz
True rms, 20 MHz bandwidth
Sensitivity : 1 mV
Accuracy : 5%
Resolution : 100 nV
Accuracy : 0.0035%
Voltage range : 240 VDC
Current range : 10 ADC
Open and short switches
Transient on/off
40 Ω 20 W, 2.4 Ω 20 W Measure ripple and noise.
Display transient response and
ripple and noise waveforms.
Measure rms ripple and noise
voltage.
Measure DC voltages. Keysight 34401A
Measure load and line
regulation.
Keysight 54600A
Keysight 6063A
44 Keysight E3630A Operating and Service Manual
Service Information 5
Type Required characteristics Use Recommended model
Current sampling
resistor (shunt)
Variable voltage
auto transformer
100 mΩ 0.1% 15 W Measure output current.
Range : 85 - 130 and
200 - 260 volts
Vary AC input.
Operation verification tests
The following tests assure that the power supply is performing properly. They do
not, however, check all the specified parameters tested in the complete
performance test described below. Proceed as follows:
1 Perform “Turn-On Checkout Procedure” on page 33.
2 Perform Load regulation (load effect) given in the following paragraphs.
Line voltage option conversion
To convert the supply from one line voltage option to another, the following three
steps are necessary:
1 After making certain that the line cord is disconnected from a source of power,
remove the top cover from the supply and set the two sections of the line
voltage selector switch for the desired line voltage (see Figure 5-1).
2 Check the rating of the installed fuse and replace it with the correct value, if
necessary. For Option OE3, use a slow-blow 1.0-amp fuse. For standard and
Option OE9, use a slow-blow 1.6-amp fuse.
3 Mark the instrument clearly with a tag or label indicating the correct line
voltage to be used.
Keysight E3630A Operating and Service Manual 45
5 Service Information
Figure 5-1 Line voltage selector (set for 115 VAC)
46 Keysight E3630A Operating and Service Manual
Performance Tests
CAUTION
The following paragraphs provide test procedures for verifying the power supply's
compliance with the specifications of Table 1-1 . Proceed to the troubleshooting
procedures if you observe any out of specification performance.
Before applying power to the supply, make certain that its line voltage
selector switch (S2) is set for the line voltage to be used. (See CAUTION
notice in page 47 operating section for additional information on S2)
General Measurement Techniques
Connecting measuring devices
To achieve valid results when measuring load regulation, ripple and noise, and
transient response time of the supply, measuring devices must be connected as
close to the output terminals as possible. A measurement made across the load
includes the impedance of the leads to the load. The impedance of the load leads
can easily be several orders of the magnitude greater than the supply impedance
and thus invalidate the measurement. To avoid mutual coupling effects, each
measuring device must be connected directly to the output terminals by separate
pairs of leads.
When performance measurements are made at the front terminals (Figure 5-2)
the load should be plugged into the front of the terminals at (B) while the
monitoring device is connected to a small lead or bus wire inserted through the
hole in the neck of the binding post at (A). Connecting the measuring device at (B)
would result in a measurement that includes the resistance of the leads between
the output terminals and the point of connection.
Service Information 5
Keysight E3630A Operating and Service Manual 47
5 Service Information
Figure 5-2 Front panel terminal connections
Selecting load resistors
Power supply specifications are checked with a full load resistance connected
across the supply output. The resistance and wattage of the load resistor,
therefore, must permit operation of the supply at its rated output voltage and
current. For example, a supply rated at 20 volts and 0.5 amperes would require a
load resistance of 40 Ω at the rated output voltage. The wattage rating of this
resistor would have to be at least 20 watts.
Electronic load
Some of the performance test procedures use an electronic load to test the supply
quickly and accurately. An electronic load is considerably easier to use than a load
resistor. It eliminates the need for connecting resistors or rheostats in parallel to
handle the power, it is much more stable than a carbon-pile load. It is easier to
switch between load conditions as required for the load regulation and load
transient response tests.
Output current measurement
For accurate output current measurements, a current sampling resistor should be
inserted between the load and the output of the supply. To simplify grounding
48 Keysight E3630A Operating and Service Manual
Service Information 5
problems, one end of this sampling resistor should be connected to the same
output terminal of the supply which will be shorted to ground. An accurate
voltmeter is then placed across the sampling resistor and the output current
calculated by dividing the voltage across the sampling resistor by its ohmic value.
The total resistance of the series combination should be equal to the full load
resistance as determined in the preceding paragraphs. Of course, if the value of
the sampling resistor is very low when compared to the full load resistance, the
value of the sampling resistor may be ignored. The meter shunt recommended in
Table 5-1, for example, has a resistance of only 100 mΩ and can be neglected
when calculating the load resistance of the supply. Figure 5-3 shows a four
terminal meter shunt. The load current through a shunt must be fed from the
extremes of the wire leading to the resistor while the sampling connections are
made as close as possible to the resistance portion itself.
Figure 5-3 Current sampling resistor connections
Rated output, tracking, meter accuracy, and current limit
To check that all supplies will furnish their maximum rated output voltage and
current, that the ±20 V outputs track each other, that the front panel meters are
accurate, and that the current limit circuits function, proceed as follows:
Keysight E3630A Operating and Service Manual 49
5 Service Information
NOTE
Voltmeter accuracy (+6 V)
1 With no loads connected: turn on the supply, connect a digital voltmeter
between the +6 V terminal and common (COM), and set the +6 V VOLTAGE
control so that the DVM indication is as near as possible to 5 volts.
2 Push the +6 V METER switch on and check the front panel voltmeter
indication. It should be within ±(0.5% +2 counts) of the DVM indication (4.96 V
to 5.04 V).
Voltmeter accuracy (±20 V)
1 With no loads connected: turn on the supply, connect a digital voltmeter
between the +20 V terminal and common (COM), and set the ±20 V VOLTAGE
control so that the DVM indication is as near as possible to 17 volts.
2 Push the +20V METER switch on and check the front panel voltmeter
indication. It should be within ±(0.5% +2 counts) of the DVM indication
(16.90 V to 17.10 V).
3 Set the TRACKING RATIO control to the FIXED position, and check the
+20 V and –20 V ranges of the front panel voltmeter similarly by connecting
the DVM to each of these outputs in turn, setting the ±20 V VOLTAGE control
for a 20 volts DVM indication, and verifying that the panel meter is accurate
within ±(0.5%+ 2 counts) (19.7 V to 20.3 V).
Tracking
4 Connect the DVM to the +20 V output, set the ±20 V VOLTAGE control for a
DVM indication of 20 volts, and reconnect the DVM to the –20 V output
without disturbing the voltage control. The voltage at the –20 V output should
be within 1% of the +20 V output (19.8 V to 20.2 V).
Variable tracking ratio
5 Leave the ±20 V VOLTAGE control set as in step (4), and use a DVM to monitor
the voltage of the –20 V supply while adjusting the TRACKING RATIO control
over its VARIABLE range. The –20 V supply should be capable of being
adjusted from less than 0.5 volts to between 19 to 21 volts. Return the
TRACKING RATIO control to the FIXED position.
Leave the TRACKING RATIO control in the FIXED position throughout the rest of
the performance test.
50 Keysight E3630A Operating and Service Manual
Service Information 5
Rated output and ammeter accuracy
6 Connect two 40 Ω 20 W load resistors across both of the 20 V outputs of the
supply and set the ±20 V VOLTAGE control for ±20 V outputs. (All supplies
must be fully loaded while checking the rated output voltage and current of
each supply.)
7 Connect the test setup shown Figure 5-4 to the +6 V output. Make the total
resistance of R
operating the output at full load. R
20 watts.
8 Close the switch and set the +6 V VOLTAGE control so that the DVM indicates a
voltage drop across the current sampling resistor that corresponds to a current
of 2.5 amps.
9 Push the +6 V METER switch and verify that the front panel ammeter indication
is within ±(0.5% + 2 counts) of 2.5 amps (2.47 A to 2.53 A).
10 Check the rated output and ammeter accuracy of the +20 V and –20 V
supplies similarly by connecting the test setup of Figure 5-4 to each output in
turn. For each 20 V supply: make the total resistance of R
sampling resistor 40Ω, set the ±20 V VOLTAGE control for a current indication
on the DVM of 0.5 A, check that the panel meter indication is within ±(0.5%+2
counts) of 0.5 A (0.48 A to 0.52 A).
and the current sampling resistor equal to 2.4Ω to permit
L
should have a power rating of at least
L
and the current
L
11 Disconnect all loads from the supply.
12 Connect the test setup shown in Figure 5-4 to the +20-volt output. Substitute
a short for R
and leave the load circuit switch open.
L
13 Set the voltage of the ±20 V supplies to 20 volts.
14 Close the load switch and determine the current flow through the current
sampling resistor (meter shunt) by measuring its voltage drop with the DVM.
The current should be 0.55 A ±5% (0.5225 A to 0.5775 A).
15 Check the current limit of the –20 V supply in the same way. Its short-circuit
current should also be 0.55 A ±5% (0.5225 A to 0.5775 A).
16 Connect the test setup shown in Figure 5-4 to the +6 V output. Close the
switch, set the total resistance of R
and the current sampling resistor to an
L
initial value of 2.4 Ω or greater, and set the output voltage to 6 volts.
Keysight E3630A Operating and Service Manual 51
5 Service Information
17 Reduce the value of R
gradually while observing the output current indicated
L
by the DVM. The current should increase to a maximum of 2.75 A ±5%
(2.6125 A to 2.8875 A) before it begins to decrease.
18 Connect a short across R
and then recheck the current indicated by the DVM.
L
The short-circuit current of this output should be 1 A ±15% (0.85 A to 1.15 A).
Disconnect the test setup from the supply.
Figure 5-4 Output current, test set up
Load regulation (load effect)
Definition:
voltage resulting from a change in load resistance from open circuit to the value
that yields maximum rated output current (or vice versa).
To check the load regulation:
1 Connect the test equipment across the output of the +20 V supply as shown in
Figure 5-5. Operate the electronic load in constant current mode and set its
current to the full rated value of the +20 V supply. Input off the electronic load.
52 Keysight E3630A Operating and Service Manual
The immediate change, •E
, in the static value of DC output
OUT
Service Information 5
2 Turn on the supply and adjust its voltage to its maximum rated value. Then
input on the electronic load.
3 Record the voltage indicated on the DVM.
4 Operate the electronic load in open (input off) mode and recheck the DVM
indication immediately. The readings’ difference during the immediate change
should be within 0.01% plus 2 mV of the reading in step (3).
5 Repeat steps (1) through (4) for each of the remaining supply outputs.
Figure 5-5 Basic test setup
Line regulation (source effect)
Definition:
voltage resulting from a change in AC input voltage from a minimum to a
maximum value (±10% of nominal voltage).
To check the line regulation:
1 Connect a variable autotransformer between the input power source and the
power supply line plug.
2 Connect the test equipment across the output of the +20 V supply as shown in
Figure 5-5. Operate the electronic load in constant current mode and set its
current to the full rated value of the +20 V supply. Input off the electronic load.
Keysight E3630A Operating and Service Manual 53
The immediate change, E
, in the static value of DC output
OUT
5 Service Information
3 Adjust the autotransformer for a low line input (-10% of nominal voltage).
4 Turn on the power, adjust the output of the supply to its maximum rated
voltage, then input on the electronic load. Record the DVM indication.
5 Adjust the autotransformer for high line voltage input (+10% of nominal
voltage) and recheck the DVM indication immediately. The readings’ difference
during the immediate change should be within 0.01% plus 2 mV of the reading
in step (4).
6 Repeat steps (2) through (5) for each of the remaining supply outputs.
Ripple and noise
Definition:
over a 20 Hz to 20 MHz bandwidth. Fluctuations below the lower frequency limit
are treated as drift.
RMS measurement
The rms measurement is not an ideal representation of the noise, since fairly high
output noise spikes of short duration could be present in the ripple and not
appreciably increase the rms value.
To measure the ripple and noise of the rms value on each output supply output:
1 Connect the test equipment across the output of the +20 V supply as shown in
Figure 5-6.
2 Turn on the supply and push +20 V METER switch.
3 Turn up output voltage to the full rated value.
4 Check that the rms noise voltage at the true rms voltmeter is less than 0.35
mV.
5 Repeat for the remaining supply outputs.
Ripple and noise are measured in the rms or peak-to-peak value
54 Keysight E3630A Operating and Service Manual
Service Information 5
Figure 5-6 Ripple and noise rms measurement test setup
Peak-to-peak measurement
The peak-to-peak measurement is particularly important for applications where
noise spikes could be detrimental to a sensitive load, such as logic circuitry.
To measure the ripple and noise of the peak-to-peak value on each output supply
output:
1 Connect the test equipment across the output of the +20 V supply as shown in
Figure 5-6, but replace the true rms voltmeter with the oscilloscope.
2 Turn on the supply and push +20 V METER switch.
3 Turn up output voltage to the full rated value.
4 Set the oscilloscope to AC mode and bandwidth to 20 MHz.
5 Check that the peak-to-peak noise is less than 1.5 mV.
6 Repeat for the remaining supply outputs.
Keysight E3630A Operating and Service Manual 55
5 Service Information
Common mode current (CMI)
Definition:
Common mode current is that AC current component which exists
between any or all supply or output lines and chassis ground.
To measure the common mode current:
1 Connect the full load for +6 V output.
2 Connect a 100 kW resistor(R
common terminal (COM) and chassis ground.
3 Connect the DVM across R
4 Turn on the supply.
5 Record the voltage across R
.
by R
S
6 Check that the current is less than 1 mA.
Load transient response time
Definition:
band around its voltage following a change from full load to half load or half load
to full load.
To measure the load transient response time:
1 Connect the test equipment across the output of the +20 V supply as shown in
Figure 5-5, but replace the DVM with the oscilloscope. Operate the electronic
load in constant current mode.
2 Turn on the supply.
3 Turn up output voltage to the full rated value.
This is the time for the output voltage to return to within a specified
) and a 2200 pF capacitor in parallel between
S
.
S
and convert it to current by dividing this voltage
S
4 Set the electronic load to transient operation mode between one half of
supply's full rated value and supply's full rated value at a 1 KHz rate with 50%
duty cycle.
5 Set the oscilloscope for AC coupling, internal sync and lock on either the
positive or negative load transient.
6 Adjust the oscilloscope to display transients as in Figure 5-7.
56 Keysight E3630A Operating and Service Manual
Service Information 5
7 Check that the pulse width (t
) of the transients at 15 mV from the base line
2-t1
is no more than 50 μsec as shown.
8 Repeat for the remaining supply outputs.
Figure 5-7 Load transient response time waveform
Keysight E3630A Operating and Service Manual 57
5 Service Information
Stability (Drift)
Definition:
following a 30-minute warm-up period with constant input line voltage, constant
load resistance and constant ambient temperature.
To measure the stability:
1 Connect the test equipment across the output of the +20 V supply as shown in
Figure 5-5.
2 Operate the electronic load in constant current mode and set its current to the
full rated value of power supply.
3 Turn on the supply.
4 Turn up output voltage to the full rated value as read on the digital voltmeter.
5 After a 30-minute warm-up, note the voltage on DVM.
6 The output voltage reading should deviate less than 0.1% plus 5 mV from the
reading obtained in step e over a period of 8 hours.
7 Repeat for the remaining supply outputs.
The change in output voltage (DC to 20 Hz) for the first 8 hours
58 Keysight E3630A Operating and Service Manual
Troubleshooting
CAUTION
Before attempting to troubleshoot the power supply, ensure that the fault is with
the supply and not with an associated piece of equipment. You can determine this
without removing the covers from the power supply by using the appropriate
portions of the Performance Tests paragraph.
Before applying power to the supply, make certain that its line voltage
selector switch (S2) is set for the line voltage to be used.
Open fuse troubleshooting
Although transients or fatigue can cause a fuse to blow, it is a good idea to
inspect the unit for obvious shorts such as damaged wiring, charred components,
or extraneous metal parts or wire clippings in contact with circuit board
conductors before replacing the fuse. The rating of the correct replacement fuse
depends on the line voltage option of the instrument: for Option OE3, use a
slow-blow 1.0-amp fuse and standard and Option OE9, use a slow-blow 1.6-amp
fuse.
Service Information 5
Keysight E3630A Operating and Service Manual 59
5 Service Information
NOTE
Adjustment And Calibration
Current limit adjustment
+6 V Supply.
follows:
1 Check the setting of the current limit by performing steps (16) and (17) on
page 51. (Be sure to set the output voltage to 6 volts.) If reducing the load
resistance permits the current to exceed 2.9 A, stop, turn R6 slightly clockwise,
and repeat the test. If, instead, the current begins to fall before it reaches
2.6 A, turn R6 slightly counter clockwise and repeat the test.
2 Recheck the setting and readjust R6 until the test shows that the current limit
circuit begins to reduce the current when a decreasing load resistance
increases it to 2.75 A ± 5%.
Meter calibration
Panel Voltmeters.
1 Connect DVM across +20 V output terminal and COM terminal of the supply.
2 Turn on the supply.
3 Set the output voltage below 18 V (ex, 15 V), and adjust R11 on the display
board until front panel VOLTS display reads exactly DVM value. Next, set the
output voltage above 20 V (ex, 21 V) and adjust R17 on the display board until
front panel VOLTS display reads exactly DVM value.
No other voltage output needs to be calibrated after calibrating the voltmeter of
+20 V output.
To adjust the current limit circuit in the +6 V supply, proceed as
To calibrate voltmeter, proceed as follows:
Panel Ammeter. To calibrate ammeter for +20 V output and –20 V output,
proceed as follows:
1 Connect R
DVM across R
2 Push +20 V meter switch and turn ±20 V VOLTAGE control fully clockwise.
60 Keysight E3630A Operating and Service Manual
between +20 V output terminal and COM terminal and connect
S
.
S
Service Information 5
3 Turn on the supply and adjust R5 on the display board until front panel AMPS
display reads exactly DVM value divided by R
.
S
4 To calibrate the ammeter for +6 V output, select +6 V meter switch and turn
+6 V VOLTAGE control fully clockwise.
5 Adjust R61 on the main board until front panel AMPS display reads exactly
DVM value divided by R
.
S
Keysight E3630A Operating and Service Manual 61
5 Service Information
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62 Keysight E3630A Operating and Service Manual
Keysight E3630A Triple Output Power Supply
Operating and Service Manual
6 Component Locator
Diagrams
Main Board — Top 64
Main Board — Bottom 65
Display Controller — Top 66
Display Controller — Bottom 67
7-Segment — Top 68
7-Segment — Bottom 69
63
6 Component Locator Diagrams
Main Board — Top
64 Keysight E3630A Operating and Service Manual
Main Board — Bottom
Component Locator Diagrams 6
Keysight E3630A Operating and Service Manual 65
6 Component Locator Diagrams
Display Controller — Top
66 Keysight E3630A Operating and Service Manual
Display Controller — Bottom
Component Locator Diagrams 6
Keysight E3630A Operating and Service Manual 67
6 Component Locator Diagrams
7-Segment — Top
68 Keysight E3630A Operating and Service Manual
7-Segment — Bottom
Component Locator Diagrams 6
Keysight E3630A Operating and Service Manual 69
6 Component Locator Diagrams
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70 Keysight E3630A Operating and Service Manual
This information is subject to change
without notice. Always refer to the
Keysight website for the latest
revision.
© Keysight Technologies 2002 - 2019
Edition 13, January 2019
Printed in Malaysia
*5959-5329*
5959-5329
www.keysight.com
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