Keysight Technologies E364xA Series, E3641A, E3640A, E3642A, E3643A User's And Service Manual

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Keysight E364xA Single Output DC Power Supplies

User’s and Service Guide

Notices

CAUTION

WARNING

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

E3640-90001

Edition

Edition 12, March 21, 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 E364xA User’s and Service Guide

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.

Caution, risk of danger (refer to this manual for specific Warning or Caution information)

Direct current or voltage (DC)

Alternating current or voltage (AC) Positive binding post

Protective conductor terminal Negative binding post

Out position of a bi-stable push control Earth (ground) terminal

In position of a bi-stable push control

Terminal is at earth potential. Used for measurement and control circuits designed to be operated with one terminal at earth potential.

Keysight E364xA User’s and Service Guide 3

Safety Considerations

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 MAINS supply cords by inadequately RATED cord. Always use

the MAINS supply cord provided by the manufacturer.

– Do not use the device if it appears damaged or defective. REMOVE

POWER and do not use the device until safe operation is verified by service-trained personnel. If necessary, return the device to Keysight for service and repair to ensure that the safety features are maintained.

– Do not operate the device around flammable gases or fumes, vapor, or

wet environments.

– Observe all markings on the device before connecting any wiring to the

device.

– Turn off the output of the power supply before connecting to the output

terminals.

– When servicing the device, use only the specified replacement parts.

– Do not install substitute parts or perform any unauthorized modification

to the device. Return the device to Keysight for service and repair to ensure that the safety features are maintained.

– Do not operate the device with the cover removed or loosened.

– Do not block the ventilation hole or fan when the device is operating.

4 Keysight E364xA User’s and Service Guide

CAUTION

– Use the device with the cables provided with the shipment.

– If the device is used in a manner not specified by the manufacturer, the

device protection may be impaired.

– Always use a dry cloth to clean the device. Do not use ethyl alcohol or

any other volatile liquid to clean the device.

– Do not permit any blockage of the ventilation holes of the device.

Keysight E364xA User’s and Service Guide 5

Safety and EMC Requirements

The E364xA complies with the following safety and Electromagnetic Compatibility (EMC) compliances:

Safety compliance

– IEC 61010-1:2001/EN 61010-1:2001 (2nd Edition)

– Canada: CAN/CSA-C22.2 No. 61010-1-04

– USA: ANSI/UL 61010-1:2004

EMC compliance

– IEC61326-1:2005/EN61326-1:2006

– CISPR 11:2003/EN55011:2007

– Canada: ICES/NMB-001: Issue 4, June 2006

– Australia/New Zealand: AS/NZS CISPR11:2004

6 Keysight E364xA User’s and Service Guide

Environmental Conditions

The E364xA is designed for indoor use and in an area with low condensation. The table below shows the general environmental requirements for this instrument.

Environmental condition Requirement

Temperature

Humidity

Altitude Up to 2000 m

Installation category II (for indoor use)

Pollution degree 2

Operating condition – 0 °C to 40 °C (full rated output) Storage condition – –20 °C to 70 °C

Operating condition – Up to 95% RH (maximum)

Keysight E364xA User’s and Service Guide 7

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.

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.

The CSA mark is a registered trademark of the Canadian Standards Association.

This symbol is a South Korean Class A EMC Declaration. This is a Class A instrument suitable for professional use and in electromagnetic environment outside of the home.

The RCM mark is a registered trademark of the Australian Communications and Media Authority.

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.

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.

8 Keysight E364xA User’s and Service Guide

Waste Electrical and Electronic Equipment (WEEE) Directive

This instrument complies with the WEEE Directive 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/dcpowersupply

(product-specific information and support, software and documentation updates)

– www.keysight.com/find/assist

(worldwide contact information for repair and service)

Keysight E364xA User’s and Service Guide 9

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10 Keysight E364xA User’s and Service Guide

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Safety and EMC Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Safety compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

EMC compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . . . 9

Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1 Getting Started

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Standard Shipped Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Preparing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Checking the power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Connecting power to the power supply . . . . . . . . . . . . . . . . . . . . . .33

Checking the output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Converting line voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Adjusting the carrying handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Rack-mounting the power supply . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Product at a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Display annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Current ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Voltage drops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Keysight E364xA User’s and Service Guide 11

Load consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Remote voltage sensing connections . . . . . . . . . . . . . . . . . . . . . . . . 50

Multiple loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Operating the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Bench operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

2 Operation and Features

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Constant Voltage Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Front panel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Remote interface operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Constant Current Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Front panel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Remote interface operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Configuring the Remote Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

GPIB configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

RS-232 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Storing and Recalling Operating States . . . . . . . . . . . . . . . . . . . . . . . . 65

Front panel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Remote interface operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Programming the Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . 67

Front panel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Remote interface operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Disabling the Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Disconnecting the output using an external relay . . . . . . . . . . . . . . 73

System-Related Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

State storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Error conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Firmware revision query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

SCPI language version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

12 Keysight E364xA User’s and Service Guide

GPIB Interface Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

RS-232 Interface Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

RS-232 configuration overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

RS-232 data frame format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Connection to a computer or terminal . . . . . . . . . . . . . . . . . . . . . . . 80

RS-232 trouble shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Calibration security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

To unsecure for calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

To secure against calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

To change the security code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Calibration count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Calibration message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

3 Remote Interface Reference

SCPI Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Output setting and measurement commands . . . . . . . . . . . . . . . . . 91

Triggering commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

System-related commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

State storage commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Calibration commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Interface configuration commands . . . . . . . . . . . . . . . . . . . . . . . . . .93

Status reporting commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

IEEE-488.2 common commands . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Introduction to the SCPI Language . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Command format used in this manual . . . . . . . . . . . . . . . . . . . . . . .97

Command separators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Using the MIN and MAX parameters . . . . . . . . . . . . . . . . . . . . . . . .98

Querying parameter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

SCPI command terminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

IEEE-488.2 common commands . . . . . . . . . . . . . . . . . . . . . . . . . . .100

SCPI parameter types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

Simplified Programming Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Using the APPLy command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Using the low-level commands . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Keysight E364xA User’s and Service Guide 13

Reading a query response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Selecting a trigger source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Power supply programming ranges . . . . . . . . . . . . . . . . . . . . . . . . 104

Using the APPLy Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Output Setting and Operation Commands . . . . . . . . . . . . . . . . . . . . . 107

Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Trigger source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Triggering commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

System-Related Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

State Storage Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Calibration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Calibration example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Interface Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

SCPI Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

What is an event register? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

What is an enable register? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Questionable status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Standard event register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Status Byte register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Using Service Request (SRQ) and serial POLL . . . . . . . . . . . . . . . . 131

Using *STB? to read the status byte . . . . . . . . . . . . . . . . . . . . . . . . 132

Using the Message Available bit (MAV) . . . . . . . . . . . . . . . . . . . . . 132

To interrupt your bus controller using SRQ . . . . . . . . . . . . . . . . . . 132

Determining when a command sequence is completed . . . . . . . . 133

Using *OPC to signal when data is in the output buffer . . . . . . . . . 133

Status Reporting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Halting an Output in Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

SCPI Conformance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

SCPI confirmed commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Device specific commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

IEEE-488 Conformance Information . . . . . . . . . . . . . . . . . . . . . . . . . . 141

4 Error Messages

14 Keysight E364xA User’s and Service Guide

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Front panel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Remote interface operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145

Execution Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

Self-Test Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Calibration Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

5 Application Programs

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160

Example Program for C and C++ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

Diode.c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

Example Program for Excel 97 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

Declaration for Windows 3.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Declaration for Windows 9.5/NT 4.0 . . . . . . . . . . . . . . . . . . . . . . . .169

6Tutorial

Overview of the Power Supply Operation . . . . . . . . . . . . . . . . . . . . . .172

Output Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174

Unregulated state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Unwanted signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

Extending the Voltage and Current Range . . . . . . . . . . . . . . . . . . . . .178

Series connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

Parallel connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

Remote Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

7 Characteristic and Specifications

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

Environmental Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

Supplemental Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186

8 Service and Maintenance

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

Keysight E364xA User’s and Service Guide 15

Operating Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Types of Services Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Standard repair service (worldwide) . . . . . . . . . . . . . . . . . . . . . . . . 192

Repacking for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Electrostatic Discharge (ESD) Precautions . . . . . . . . . . . . . . . . . . . . . 193

Surface Mount Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Replacing the Power-Line Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Unit reports errors 740 to 755 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Unit fails self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Bias supplies problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Self-Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Power-on self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Complete self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

General Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Test Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Operation Verification and Performance Tests . . . . . . . . . . . . . . . . . . 202

Operation verification tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Performance tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Measurement Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Common test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Current-monitoring resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

General measurement techniques . . . . . . . . . . . . . . . . . . . . . . . . . 204

Electronic load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Constant Voltage (CV) Verifications . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Constant voltage test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Voltage programming and readback accuracy . . . . . . . . . . . . . . . 206

CV load effect (load regulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

CV source effect (line regulation) . . . . . . . . . . . . . . . . . . . . . . . . . . 209

CV PARD (ripple and noise) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

16 Keysight E364xA User’s and Service Guide

Load transient response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212

Constant Current (CC) Verification . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Constant current test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Current programming and readback accuracy . . . . . . . . . . . . . . . .213

CC load effect (load regulation) . . . . . . . . . . . . . . . . . . . . . . . . . . .215

CC source effect (line regulation) . . . . . . . . . . . . . . . . . . . . . . . . . .216

CC PARD (ripple and noise) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217

Common Mode Current Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219

Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220

Calibration Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Keysight calibration services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223

Calibration interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223

To unsecure the power supply without the security code . . . . . . .223

General Calibration or Adjustment Procedure . . . . . . . . . . . . . . . . . . .225

Front panel voltage and current calibration . . . . . . . . . . . . . . . . . .226

Calibration Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230

Calibration Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

Component Locator Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233

Component locator diagram for the main board assembly — top .233

Component locator diagram for the main board assembly - bottom .

234

Component locator diagram for the front panel . . . . . . . . . . . . . . .235

Component locator diagram for the main board assembly — top (serial

MY53xx6xxx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Component locator diagram for the main board assembly — bottom (se-

rial MY53xx6xxx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .237

Keysight E364xA User’s and Service Guide 17

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18 Keysight E364xA User’s and Service Guide

List of Figures

Figure 1-1 Rear output terminals . . . . . . . . . . . . . . . . . . . . . . . . .29

Figure 1-2 Line voltage selector (set for 115 Vac) . . . . . . . . . . . .36

Figure 1-3 Front panel outlook . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Figure 1-4 Voltage and current limit settings . . . . . . . . . . . . . . . .44

Figure 1-5 Rear panel outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Figure 1-6 Display annunciators . . . . . . . . . . . . . . . . . . . . . . . . . .46

Figure 1-7 Remote voltage sensing connections . . . . . . . . . . . . .51

Figure 1-8 Local sensing connections . . . . . . . . . . . . . . . . . . . . . .51

Figure 2-1 Recommended protection circuit for battery charging . .

Figure 2-2 Recommended connection to prevent voltage overshoot

Figure 2-3 DB-9 serial connection . . . . . . . . . . . . . . . . . . . . . . . .80

Figure 2-4 DB-25 serial connection . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 3-1 SCPI status system . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Figure 6-1 Diagram of a simple series power supply . . . . . . . . .172

Figure 6-2 Block diagram of the power supply showing the remote in-

Figure 6-3 Ideal constant voltage

Figure 6-4 Ideal constant current power supply . . . . . . . . . . . . .174

Figure 6-5 Output characteristics . . . . . . . . . . . . . . . . . . . . . . . .175

Figure 6-6 Simplified diagram of common mode and normal mode

Figure 6-7 Speed of response - programming up (full load) . . .179

Figure 6-8 Speed of response - programming down . . . . . . . . .180

Figure 7-1 E364xA dimensions . . . . . . . . . . . . . . . . . . . . . . . . . .182

Figure 7-2 E364xA dimensions for rack mounting . . . . . . . . . . .183

Figure 8-1 Performance verification test setup . . . . . . . . . . . . . .203

Figure 8-2 Front/ rear panel terminal connections . . . . . . . . . . .204

Figure 8-3 Front/rear panel terminal connections for the Vrms

Figure 8-4 Transient response time . . . . . . . . . . . . . . . . . . . . . . .212

Figure 8-5 CC PARD (ripple and noise) connections . . . . . . . . .217

terface isolation . . . . . . . . . . . . . . . . . . . . . . . . . . .173

power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174

sources of noise . . . . . . . . . . . . . . . . . . . . . . . . . . .177

measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

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20 Keysight E364xA User’s and Service Guide

List of Tables

Table 1-1 E364xA options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Table 1-2 E364xA accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 1-3 E364xA power-line fuse . . . . . . . . . . . . . . . . . . . . . . . .33

Table 1-4 Front panel overview . . . . . . . . . . . . . . . . . . . . . . . . . .43

Table 1-5 Rear panel overview . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Table 1-6 Display annunciators overview . . . . . . . . . . . . . . . . . .47

Table 1-7 Wire rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Table 2-1 Factory-setting security codes . . . . . . . . . . . . . . . . . .83

Table 3-1 Keysight E3640A/E3642A/E3644A programming ranges

104

Table 3-2 Keysight E3641A/E3643A/E3645A programming ranges

105

Table 3-3 Reset state of the power supply . . . . . . . . . . . . . . . . 118

Table 3-4 Bit definitions – Questionable Status register . . . . . .128

Table 3-5 Bit definitions – Standard Event register . . . . . . . . . .129

Table 3-6 Bit definitions – Status Byte Summary register . . . . 130

Table 4-1 Execution error messages . . . . . . . . . . . . . . . . . . . . .146

Table 4-2 Self-test error messages . . . . . . . . . . . . . . . . . . . . . .152

Table 4-3 Calibration error messages . . . . . . . . . . . . . . . . . . . .155

Table 7-1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . .182

Table 7-2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . .184

Table 7-3 Supplemental characteristics . . . . . . . . . . . . . . . . . .186

Table 8-1 Bias supplies voltages . . . . . . . . . . . . . . . . . . . . . . . .195

Table 8-2 Bias supplies voltages (serial MY53xx6xxx) . . . . . . . .195

Table 8-3 Self-test error messages . . . . . . . . . . . . . . . . . . . . . .196

Table 8-4 Recommended test equipment . . . . . . . . . . . . . . . . .199

Table 8-5 Verification programming values . . . . . . . . . . . . . . . .206

Table 8-6 CV performance test record . . . . . . . . . . . . . . . . . . . .220

Table 8-7 CC performance test record . . . . . . . . . . . . . . . . . . .221

Table 8-8 Parameters for calibration . . . . . . . . . . . . . . . . . . . . .225

Table 8-9 Calibration record . . . . . . . . . . . . . . . . . . . . . . . . . . . .230

Table 8-10 Calibration error messages . . . . . . . . . . . . . . . . . . . .232

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22 Keysight E364xA User’s and Service Guide

Keysight E364xA Single Output DC Power Supplies User’s and Service Guide

1 Getting Started

Introduction 26 Standard Shipped Items 30 Preparing the Power Supply 32 Product at a glance 42 Output Connections 48 Operating the Power Supply 54

This chapter guides you to set up your power supply for the first time. An introduction to all the features of the power supply is also given.

1 Getting Started

Introduction

The Keysight E3640A/E3641A (30 W), E3642A/E3643A (50 W), and E3644A/ E3645A (80 W) are high performance single output dual range programmable DC power supplies with GPIB and RS-232 interfaces. The combination of bench-top and system features in these power supplies provides versatile solutions for your design and test requirements.

Convenient bench-top features

– Single output dual range

–Output on/off

– High accuracy and high resolution

– Excellent load and line regulation

–Low ripple and noise

– Overvoltage protection

– Five operating states storage

–Easy-to-use controls

– Remote voltage sensing

– Front and rear output terminals

– Portable, ruggedized case with non-skid feet

– Highly visible vacuum-fluorescent display

– Error messages available on the display

Flexible system features

– Standard GPIB (IEEE-488) and RS-232 interfaces

– Standard Commands for Programmable Instruments (SCPI) compatibility

– Easy I/O setup from the front panel

– Software calibration, no internal physical adjustment

The E364xA power supplies feature a combination of programming capabilities and linear power supply performance that makes them ideal for power systems

26 Keysight E364xA User’s and Service Guide

Getting Started 1

applications. The E364xA power supplies may be programmed locally from the front panel or remotely over the GPIB and RS-232 interfaces.

The E364xA power supplies have two ranges, allowing more voltage at a lower current or more current at a lower voltage. The output range is selected from the front panel or over the remote interfaces.

Operational features

–Single output dual range

– Constant voltage (CV) or constant current (CC) operation

– Overvoltage protection (OVP)

– Five storage locations (1 to 5) for user-defined operating states

– Automatic turn-on self-test

– Remote sense at rear panel terminals

– User calibration from the front panel or over the remote interfaces

Front panel operations

– Easy-to-use control features

– Output range selection

– Enabling or disabling OVP

– Setting the OVP trip levels

– Clearing the OVP conditions

– Setting and displaying the voltage and current limit values

– Storing or recalling the operating state

– Resetting the power supply to the power-on state

– Returning the power supply to the local mode from the remote mode

– Retrieving or scrolling error messages on the display

– Viewing the calibration message or system firmware revision

– Calibrating the power supply, including changing the calibration secure code

– Configuring the remote interfaces

– Enabling or disabling the output

Keysight E364xA User’s and Service Guide 27

1 Getting Started

When operated over the remote interface, the E364xA power supplies can be both a listener and a talker. Using an external controller, you can instruct the power supply to set the output and to send the status data back over the GPIB or RS-232 interface. Capabilities include the following features:

– Voltage and current programming

– Voltage and current readback

– Present and stored status readback

– Programming syntax error detection

– Complete self-test

The front panel Vacuum-Fluorescent Display (VFD) includes:

– Displaying the actual values of the output voltage and current (meter mode)

– Displaying the limit values of the voltage and current (limit mode)

– Checking the operating status from the annunciators

– Checking the type of error from the error codes (messages)

Front panel binding posts are available to connect load wires for bench operation. Connections to the power supply’s output and to chassis ground are made to the rear output terminals.

28 Keysight E364xA User’s and Service Guide

Getting Started 1

WARNING

Floating the power supply output at more than ±60 Vdc from the chassis presents an electric shock hazard to the user.

Do not float the outputs at more than ±60 Vdc when uninsulated sense wires are used to connect the (+) output to the (+) sense and the (–) output to the (–) sense terminals on the back of the unit.

Keysight E364xA User’s and Service Guide 29

Figure 1-1 Rear output terminals

1 Float voltage ±60 Vdc Max to (shorting conductors without insulation).

2 Float voltage ±240 Vdc Max to (insulated shorting conductors).

1 Getting Started

Standard Shipped Items

Verify that you have received the following items in the shipment of your power supply. If anything is missing or damaged, contact your nearest Keysight Sales Office.

–Power cord

–Certificate of Calibration

– E364xA Product Reference CD

– E364xA User’s and Service Guide (this manual)

– E364xA Quick Reference Card

Options

Options 0EM, 0E3, and 0E9 determine which power-line voltage is selected at the factory. The standard unit is configured for 115 Vac ±10%, 47 Hz to 63 Hz input voltage.

For more information about changing the power-line voltage setting, refer to

“Converting line voltage” on page 36.

Tab le 1-1 E364xA options

Option Description

OEM 115 Vac ±10%, 47 Hz to 63 Hz input voltage

OE3 230 Vac ±10%, 47 Hz to 63 Hz input voltage

OE9 100 Vac ±10%, 47 Hz to 63 Hz input voltage

1CM Rack mount kit (Keysight part number 5063-9240)

910

[a] To order an extra English user’s guide, order Keysight part number E3640-90001.

Extra manual (same language as the selected language manual when you order

the power supply)

[a]

30 Keysight E364xA User’s and Service Guide

Accessories

The accessories listed below may be ordered from your local Keysight Sales Office either with the power supply or separately.

Table 1-2 E364xA accessories

Part Number Description

10833A GPIB cable, 1 m (3.3 ft.)

10833B GPIB cable, 2 m (6.6 ft.)

34398A

Getting Started 1

– RS-232, 9 pin (f) to 9 pin (f), 2.5 m (8.2 ft.) cable – 9 pin (m) to 25 pin (f) adapter

Keysight E364xA User’s and Service Guide 31

1 Getting Started

NOTE

Preparing the Power Supply

Checking the power supply

1 Check the shipped items.

Verify that you have received the items listed in “Standard Shipped Items” on page 30. If anything is missing or damaged, contact your nearest Keysight Sales Office.

2 Connect the power cord and turn on the power supply.

The front panel display will light up briefly while the power supply performs its power-on self-test. The GPIB address is also displayed. To review the

power-on display with all annunciators turned on, hold down as you turn on the power supply. If the power supply does not turn on properly, refer to

“Connecting power to the power supply” on page 33.

3 Perform a complete sel f-test.

The complete self-test performs a more extensive set of tests than those performed at power-on. Hold down as you turn on the power supply and

hold down the key until you hear a long beep. The self-test will begin when you release the key following the beep.

If the self-test fails, refer to Chapter 8, "Service and Maintenance" for instructions on returning the power supply to Keysight for service.

The power supply is shipped from the factory with a power-line cord that has a plug appropriate for your location. Your power supply is equipped with a 3-wire grounding type power cord; the third conductor being the ground. The power supply is grounded only when the power-line cord is plugged into an appropriate receptacle. Do not operate your power supply without adequate cabinet ground connection.

32 Keysight E364xA User’s and Service Guide

Connecting power to the power supply

If the power supply does not turn on

Use the following steps to help solve problems you might encounter when turning on the instrument. If you need more help, refer to Chapter 8, "Service and

Maintenance" for instructions on returning the instrument to Keysight for service.

1 Verify that there is AC power to the power supply

First, verify that the power cord is firmly plugged into the power receptacle on the rear panel of the power supply. You should also make sure that the power source you plugged the power supply into is energized. Then, verify that the power supply is turned on.

2 Verify the power-line voltage setting.

The line voltage is set to the proper value for your country when the power supply is shipped from the factory. Change the voltage setting if it is not correct. The settings are 100 Vac, 115 Vac, or 230 Vac.

Getting Started 1

3 Verify that the correct power-line fuse is installed.

The correct fuse is installed for your country when the power supply is shipped from the factory. Refer to Table 1-3 to replace the fuse for your power supply.

Table 1-3 E364xA power-line fuse

Model Keysight part number Part description

E3640A E3641A

E3642A E3643A

E3644A E3645A

2110-0918 Fuse 1.6 A 250 V for 100 Vac and 115 Vac

2110-1346 Fuse 1 A T 250 V for 230 Vac

2110-1550 Fuse 2.5 A T 125 V for 100 Vac and 115 Vac

2110-1346 Fuse 1 A T 250 V for 230 Vac

2110-1549 Fuse 3.15 A T 125 V for 100 Vac and 115 Vac

2110-1548 Fuse 2 A T 250 V for 230 Vac

Keysight E364xA User’s and Service Guide 33

1 Getting Started

NOTE

Checking the output

The following procedures ensure that the power supply develops its rated outputs and properly responds to operation from the front panel. For complete performance and verification tests, refer to Chapter 8, "Service and Maintenance".

If an error is detected during the output checkout procedures, the ERROR annunciator will turn on. Refer to Chapter 4, "Error Messages" for more information.

Voltage output check

The following steps verify the basic voltage functions with no load.

1 Turn on the power supply

The power supply will go into the power-on/reset state, the output is disabled (the OFF annunciator turns on), and its low voltage range is selected. The OVP annunciator and the low voltage range indication annunciator turn on (for example, the 8 V annunciator turns on for the E3640A model), and the knob is selected for voltage control.

2 Enable the outputs.

The OFF annunciator turns off and the CV annunciator turns on. Notice that the display is in the meter mode. Meter mode means that the display shows the actual output voltage and current.

3 Check that the front panel voltmeter properly responds to the knob control

for both the low and high voltage ranges.

Turn the knob clockwise or counter-clockwise to check that the voltmeter responds to the knob control and the ammeter indicates nearly zero. The flashing digit can be adjusted by turning the knob.

4 Ensure that the voltage can be adjusted from zero to the full rated value by

adjusting the knob.

[1] You can use the resolution selection keys to move the flashing digit to the right or left when setting

the voltage.

34 Keysight E364xA User’s and Service Guide

[1]

Getting Started 1

Current output check

The following steps check the basic current functions with a short across the power supply’s output.

1Turn on the power supply.

Make sure that the output is disabled. The OFF annunciator is turned on.

2 Connect a short across the + and – output terminals with an insulated test

lead.

Use a wire size sufficient to handle the maximum current. Refer to Table 1-7 for more information

3 Enable the output.

The CV or CC annunciator turns on depending on the resistance of the test lead. Notice that the display is in the meter mode.

4 Ad just the voltage limit value to 1.0 V.

Set the display to the limit mode (the Limit annunciator will be flashing). Adjust the voltage limit to 1.0 V to assure the CC operation. The CC

annunciator will turn on. To return to the normal mode, press the key again or let the display time-out after several seconds.

5 Set the knob to the current control to check that the front panel ammeter

properly responds to the knob control.

Turn the knob clockwise or counter-clockwise when the display is in the meter mode (the Limit annunciator is turned off). Check that the ammeter responds to the knob control and the voltmeter indicates nearly zero (the voltmeter will show the voltage drop caused by the test lead). The flashing digit can be adjusted by turning the knob.

6 Ensure that the current can be adjusted from zero to the full rated value.

[1]

7 Turn off the power supply and remove the short from the output terminals.

[1] You can use the resolution selection keys to move the flashing digit to the right or left when setting

the current.

Keysight E364xA User’s and Service Guide 35

1 Getting Started

WARNING

Converting line voltage

Shock Hazard Operating personnel must not remove the power supply covers. Component replacement and internal adjustments must be made only by qualified service personnel.

Line voltage conversion is accomplished by adjusting two components: the line voltage selection switch and the power-line fuse on the rear panel.

1 Remove the AC line power.

2 Remove the cover. “General Disassembly” on page 198.

3 Set the two sections of the line voltage selector switch on the PC board for the

4 Refer to “Replace the power-line fuse” on page 37 to check the rating of the

5 Replace the cover and mark the power supply clearly with a tag or label

desired line voltage. Refer to Figure 1-2.

power-line fuse and replace with the correct one if necessary.

indicating the correct line voltage and fuse that is in use.

Figure 1-2 Line voltage selector (set for 115 Vac)

36 Keysight E364xA User’s and Service Guide

Getting Started 1

Replace the power-line fuse

1 Remove the power cord, and remove the fuse-holder assembly from the rear

panel with a flat-blade screwdriver.

2 Remove the fuse-holder from the assembly

Keysight E364xA User’s and Service Guide 37

1 Getting Started

NOTE

3 Replace with the correct fuse.

4 Replace the fuse-holder assembly in the rear panel

Verify that the correct line voltage is selected and the power-line fuse is good.

38 Keysight E364xA User’s and Service Guide

Adjusting the carrying handle

To adjust the position, grasp the handle by the sides and pull outward. Then, rotate the handle to the desired position.

Getting Started 1

Keysight E364xA User’s and Service Guide 39

1 Getting Started

NOTE

Rack-mounting the power supply

You can mount the power supply in a standard 19-inch rack cabinet using one of three optional kits available. Instructions and mounting hardware are included with each rack-mounting kit. Any Keysight System II instrument of the same size can be rack-mounted beside the Keysight E3640A, E3641A, E3642A, E3643A, E3644A, or E3645A.

Remove the carrying handle and the front and rear rubber bumpers before rack-mounting the power supply.

1 To remove the handle, rotate it to the vertical position and pull the ends

outwards

2 To remove the rubber bumper, stretch a corner and then slide it off.

40 Keysight E364xA User’s and Service Guide

Getting Started 1

3 To rack-mount a single instrument, order the adapter kit (5063-9240)

4 To rack-mount two instruments side-by-side, order the lock-link kit

(5061-9694) and the rack-mount kit (5063-9212). Be sure to use the support rails inside the rack cabinet.

5 To install one or two instruments in a sliding support shelf, order the support

shelf (5063-9255) and the slide kit (1494-0015). For a single instrument, order the filler panel (5002-3999)

Keysight E364xA User’s and Service Guide 41

1 Getting Started

Product at a glance

Front panel

Figure 1-3 Front panel outlook

42 Keysight E364xA User’s and Service Guide

Getting Started 1

Table 1-4 Front panel overview

No Item Description

1 Low voltage range selection key Select the low voltage range and allow its full rated output to

the output terminals.

2 High voltage range selection key Select the high voltage range and allow its full rated output to

the output terminals.

3 Overvoltage protection key Enable or disable the overvoltage protection function, set the

trip voltage level, and clear the overvoltage condition.

4 Display limit key Show the voltage and current limit values on the display and

allow the knob adjustment for setting limit values.

5 Voltage/Current adjust

selection key

6 Stored state recall menu Recall a stored operating state from location 1 through 5 and

State storage menu/Local key

View menu/Calibrate key

[b]

9 I/O configuration menu/Secure

[c]

key

10 Output On/Off key Enable or disable the power supply output. This key toggles

Select the knob control function for voltage or current adjustment.

reset the power supply to the power-on state (*RST command) from the front panel by selecting RESET from this menu.

[a]

Store up to five power supply states in non-volatile memory and assign a name to each of the storage locations, or return the power supply to the local mode from the remote interface mode.

View the error codes and the text of the error message, calibration string, and system firmware revision, or enable the calibration mode.

Configure the power supply for remote interfaces, or secure or unsecure the power supply for calibration.

between on and off.

11 Resolution selection keys Move the flashing digit to the right or left, and adjust the

scrolling speed of the text being displayed in the View menu.

12 Knob Increase or decrease the value of the flashing digit by turning

clockwise or counter-clockwise.

[a] The key can be used as the Local key when the power supply is in the remote interface mode.

[b] You can enable the calibration mode by holding down this key when you turn on the power supply.

[c] You can use it as the Secure or Unsecure key when the power supply is in the calibration mode.

Keysight E364xA User’s and Service Guide 43

1 Getting Started

NOTE

Voltage and current limit settings

You can set the voltage and current limit values from the front panel using the following method.

Figure 1-4 Voltage and current limit settings

1 Select the desired voltage range using the voltage range selection keys after

2 Press to show the limit values on the display.

3 Move the blinking digit to the appropriate position using the resolution

turning on the power supply.

selection keys and change the blinking digit value to the desired voltage limit by turning the control knob. If the display limit times out, press again.

4 Set the knob to the current control mode by pressing

5 Move the blinking digit to the appropriate position using the resolution

selection keys and change the blinking digit value to the desired current limit by turning the control knob.

6 Press to enable the output. After about 5 seconds, the display will go to

the output monitoring mode automatically to display the voltage and current at the output.

All the front panel keys and controls can be disabled with the remote interface commands. The power supply must be in the Local mode for the front panel keys and controls to function.

44 Keysight E364xA User’s and Service Guide

Rear panel

NOTE

Getting Started 1

Figure 1-5 Rear panel outlook

The supplier code of the C-Tick for the E3643A or E3645A is N10149.

Keysight E364xA User’s and Service Guide 45

1 Getting Started

Tab le 1-5 Rear panel overview

No Description

1AC inlet

2 Power-line fuse-holder assembly

3 Power-line module

4 RS-232 interface connector

5 GPIB (IEEE-488) interface connector

6Rear output terminals

Use the front panel key to:

– Select the GPIB or RS-232 interface.

– Set the GPIB address.

– Set the RS-232 baud rate and parity.

Display annunciators

Figure 1-6 Display annunciators

46 Keysight E364xA User’s and Service Guide

Getting Started 1

NOTE

Table 1-6 Display annunciators overview

Item Description

Adrs The power supply is addressed to listen or talk over a remote interface.

Rmt The power supply is in the remote interface mode.

[a]

[b]

/35V

[a]

[b]

/60V

20V

OVP

CAL The power supply is in the calibration mode.

Limit The display shows the limit values of the voltage and current.

ERROR

Indicate that the low voltage range is selected.

Indicate that the high voltage range is selected.

The overvoltage protection function is enabled when the OVP annunciator turns on or the overvoltage protection circuit has caused the power supply to shut down when the annunciator blinks.

Hardware or remote interface command errors are detected and the error bit has not been cleared.

OFF

The output of the power supply is disabled. Refer to “Disabling the Output” on page 72 for more information.

Unreg The output of the power supply is unregulated (output is neither CV nor CC).

CV The power supply is in the constant voltage mode.

CC The power supply is in the constant current mode.

[a] For the E3640A/E3642A/E3644A power supplies.

[b] For the E3641A/E3643A/E3645A power supplies.

To review the display annunciators, hold down as you turn on the power supply.

Keysight E364xA User’s and Service Guide 47

1 Getting Started

CAUTION

NOTE

Output Connections

Before attempting to connect wires to the rear output terminals, make sure to turn off the power supply first to avoid damage to the circuits being connected.

Front panel binding posts are available to connect load wires for bench operation and are paralleled with the rear panel (+) and (–) connections. Both the front and rear panel terminals are optimized for noise, regulation, and transient response as documented in Chapter 7.

Available connections on the rear output terminals include the (+) and (–) outputs, the (+) and (–) sense terminals, and an earth ground terminal. The rear output terminals accept wire sizes from American Wire Gage (AWG) 24 to AWG 14.

For the E3644A/E3645A power supplies, when making load connections from the rear output terminals, four load wires should be used to keep good CV load regulation if carrying the full-rated current of the power supply.

Current ratings

Table 1-7 lists the characteristics of the AWG copper wire.

Tab le 1-7 Wire rating

AWG 10121416182022242628

Suggested maximum current (amperes)

Ω

/ft

mΩ/ft

[a] Single conductor in free air at 30 °C with insulation.

48 Keysight E364xA User’s and Service Guide

[a]

40 25 20 13 10 7 5 3.5 2.5 1.7

1.00 1.59 2.53 4.02 6.39 10.2 16.1 25.7 40.8 64.9

3.3 5.2 8.3 13.2 21.0 33.5 52.8 84.3 133.9 212.9

NOTE

To satisfy safety requirements, load wires must be heavy enough not to overheat when carrying the maximum short-circuit output current of the power supply. If there is more than one load, then any pair of load wires must be capable of safely carrying the full-rated current of the power supply.

Voltage drops

The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the wires. In general, if the wires are heavy enough to carry the maximum short circuit current without overheating, excessive voltage drops will not be a problem. The voltage drops across the load wires should be limited to less than two volts. Refer to Tab le 1-7 to calculate the voltage drop for some commonly used AWG copper wires.

Load consideration

Capacitive loading

The power supply will be stable for almost any size load capacitance. However, large load capacitors may cause transient response ringing. Certain combinations of load capacitance, equivalent series resistance, and load lead inductance may result in instability (oscillation). If this occurs, the problem may often be solved by either increasing or decreasing the size of the capacitive load.

Getting Started 1

A large load capacitor may cause the power supply to cross into CC or unregulated mode momentarily when the output voltage is reprogrammed. The slew rate of the output voltage will be limited to the current setting divided by the total load capacitance (internal and external).

Inductive loading

Inductive loads present no loop stability problems in the constant voltage mode. In the constant current mode, inductive loads form a parallel resonance with the power supply’s output capacitor. Generally this will not affect the stability of the power supply, but it may cause ringing of the current in the load.

Keysight E364xA User’s and Service Guide 49

1 Getting Started

NOTE

Pulse loading

In some applications, the load current varies periodically from a minimum to a maximum value. The constant current circuit limits the output current. Some peak loading exceeding the current limit can be obtained due to the output capacitor. To stay within the specifications for the output, the current limit should be set greater than the peak current expected or the supply may go into the CC mode or unregulated mode for brief periods.

Reverse current loading

An active load connected to the power supply may actually deliver a reverse current to the supply during a portion of its operating cycle. An external source can not be allowed to pump current into the supply without risking loss of regulation and possible damage.

These effects can be avoided by pre-loading the output with a dummy load resistor. The dummy load resistor should draw at least the same amount of current from the supply as the active load may deliver to the supply. The value of the current for the dummy load plus the value of the current the load draws from the supply must be less than the maximum current of the supply.

Remote voltage sensing connections

Remote voltage sensing is used to maintain regulation at the load and reduce the degradation of regulation that would occur due to the voltage drop in the leads between the power supply and the load.

When the power supply is connected for remote sensing, the OVP circuit senses the voltage at the sensing points (load) and not the output terminals.

Connections between the power supply sensing and output terminals should be removed, and using a shielded two-wire cable, the power supply sensing terminals should be connected to the load as shown in Figure 1-7.

Do not use the shield as one of the sensing conductors and the other end should be left unconnected.

50 Keysight E364xA User’s and Service Guide

Getting Started 1

Connect one end of the sensing lead shield to the chassis ground ( ) only. Opening a sensing lead causes the power supply’s output voltage to decrease at the load leads. Observe the polarity when connecting the sensing leads to the load.

Figure 1-7 Remote voltage sensing connections

Figure 1-8 Local sensing connections

Keysight E364xA User’s and Service Guide 51

1 Getting Started

NOTE

Stability

Using remote sensing under certain combinations of load lead lengths and large load capacitances may cause your application to form a filter, which becomes part of the voltage feedback loop. The extra phase shift created by this filter can degrade the power supply’s stability, resulting in poor transient response or loop instability. In severe cases, it may cause oscillations.

To minimize this possibility, keep the load leads as short as possible and twist them together. As the sense leads are part of the power supply’s programming feedback loop, accidental open-connections of sense or load leads during remote sensing operation have various unwanted effects. Provide secure and permanent connections.

During remote sensing setup, it is strongly recommended to power off (by pressing the power ON/OFF button) the power supply to avoid undesirable damage to the load or the power supply.

CV regulation

The voltage load regulation specification in Chapter 7 applies at the output terminals of the power supply. When remote sensing, add 5 mV to this specification for each 1 V drop between the positive sensing point and (+) output terminal due to the change in load current. Because the sense leads are part of the power supply’s feedback path, keep the resistance of the sense leads at or below 0.5 Ω per lead to maintain the above specified performance.

Output rating

The rated output voltage and current specifications in Chapter 7 apply at the output terminals of the power supply. With remote sensing, any voltage dropped in the load leads must be added to the load voltage to calculate the maximum output voltage. The performance specifications are not guaranteed when the maximum output voltage is exceeded. If the excessive demand on the power supply forces the power supply to lose regulation, the Unreg annunciator will turn on to indicate that the output is unregulated.

52 Keysight E364xA User’s and Service Guide

Output noise

Any noise picked up on the sense leads also appears at the output of the power supply and may adversely affect the voltage load regulation. Twist the sense leads to minimize external noise pickup and run them parallel and close to the load leads. In noisy environments, it may be necessary to shield the sense leads. Ground the shield at the power supply end only. Do not use the shield as one of the sense conductors.

Multiple loads

When connecting multiple loads to the power supply, each load should be connected to the output terminals using separate connecting wires. This minimizes mutual coupling effects between loads and takes full advantage of the low output impedance of the power supply. Each pair of wires should be as short as possible and twisted or bundled to reduce lead inductance and noise pick-up. If a shield is used, connect one end to the power supply ground terminal and leave the other end disconnected.

If cabling considerations require the use of distribution terminals that are located remotely from the power supply, connect output terminals to the distribution terminals by a pair of twisted or shielded wires. Connect each load to the distribution terminals separately.

Getting Started 1

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1 Getting Started

Operating the Power Supply

Cooling

The power supply can operate at the rated specifications within the temperature range of 0 °C to 40 °C. A fan cools the power supply by drawing air through the sides and exhausting it out the back. Using a Keysight rack-mount will not impede the flow of air.

Bench operation

Your power supply must be installed in a location that allows sufficient space at the sides and rear of the power supply for adequate air circulation. The rubber bumpers must be removed for rack-mounting.

Cleaning

No cleaning is required for this product. If you wish to remove dust from the enclosure, use a dry cloth.

54 Keysight E364xA User’s and Service Guide

Keysight E364xA Single Output DC Power Supplies User’s and Service Guide

2 Operation and Features

Overview 56 Constant Voltage Operation 57 Constant Current Operation 60 Configuring the Remote Interface 63 Storing and Recalling Operating States 65 Programming the Overvoltage Protection 67 Disabling the Output 72 System-Related Operations 74 GPIB Interface Reference 78 RS-232 Interface Reference 79 Calibration 82

This chapter describes the operations and features for the E364xA single output DC power supplies.-

2Operation and Features

Overview

The following section provides an overview of the front panel keys before operating your power supply.

– The power supply is shipped from the factory configured in the front panel

operation mode. At power-on, the power supply is automatically set to operate in the front panel operation mode. When in this mode, the front panel keys can be used.

– When the power supply is in the remote operation mode, you can return to the

front panel operation mode at any time by pressing the (Local) key if you did not previously send the front panel lockout command. A change between

the front panel and remote operation modes will not result in a change in the output

– When you press (the Limit annunciator flashes), the display of the power

supply goes to the limit mode and the present limit values will be displayed. In this mode, you can also observe the change of the limit values when adjusting

the knob. If you press again or let the display time--out after several seconds, the power supply will return the display to the meter mode (the Limit

annunciator turns off). In this mode, the actual output voltage and current will be displayed.

– The output of the power supply can be enabled or disabled from the front

panel by pressing . When the output is off, the OFF annunciator turns on and the output is disabled.

– The display provides the present operating status of the power supply with

annunciators and also informs you of error codes. For example, the power supply is operating in the CV mode in the 8 V/3 A range and controlled from the front panel, then the CV and 8V annunciators will turn on. If, however, the power supply is remotely controlled, the Rmt annunciator will also turn on, and when the power supply is being addressed over the GPIB interface, the Adrs annunciator will turn on. Refer to “Display annunciators” on page 46 for more information.

– The display provides the present operating status of the power supply with

annunciators and also informs you of error codes.

56 Keysight E364xA User’s and Service Guide

Constant Voltage Operation

NOTE

To set up the power supply for constant voltage (CV) operation, proceed as follows.

Front panel operation

1 Connect a load to the output terminals

With power-off, connect a load to the + and - output terminals.

2Turn on the power supply.

The power supply will go into the power-on/reset state and the output is disabled (the OFF annunciator turns on). Its low voltage range is selected and the annunciator for the range presently selected turns on, for example, the 8V annunciator turns on for the E3640A model. The knob is selected for voltage control.

Press to operate the power supply in the high voltage range before proceeding to the next step. The 20V or 60V annunciator turns on depending on which power supply you are using.

Operation and Features 2

3 Set the d isplay to the limit mode.

Notice that the Limit annunciator flashes, indicating that the display is in the limit mode. When the display is in the limit mode, you can see the voltage and current limit values of the power supply.

In the constant voltage mode, the voltage values between the meter and limit modes are the same, but the current values are not. Moreover, if the display is in the meter mode, you cannot see the change of current limit value when adjusting the knob. We recommend that you should set the display to the limit mode to see the change of current limit value in the constant voltage mode whenever adjusting the knob.

Keysight E364xA User’s and Service Guide 57

2Operation and Features

NOTE

4 Ad just the knob for the desired current limit.

[1]

Check that the Limit annunciator still flashes. Set the knob for current control. The flashing digit can be changed using the resolution selection keys and the flashing digit can be adjusted by turning the knob. Adjust the knob to the desired current limit.

5 Ad just the knob for the desired output voltage.

[2]

Check that the Limit annunciator still flashes. Set the knob for voltage control. Change the flashing digit using the resolution selection keys and adjust the knob for the desired output voltage.

6 Return to the meter mode.

Press or let the display time-out after several seconds to return to the meter mode. Notice that the Limit annunciator turns off and the display shows

the OUTPUT OFF message.

7 Enable the output.

The OFF annunciator turns off and the CV annunciator turns on. Notice that the display is in the meter mode.

8 Verify that the power supply is in the constant voltage mode.

If you operate the power supply in the constant voltage (CV) mode, verify that the CV annunciator is lit. If the CC annunciator is lit, choose a higher current limit.

During actual CV operation, if a load change causes the current limit to be exceeded, the power supply will automatically crossover to the constant current mode at the preset current limit and the output voltage will drop proportionately.

[1] You can use the resolution selection keys to move the flashing digit to the right or left when setting

current.

[2] You can use the resolution selection keys to move the flashing digit to the right or left when setting

voltage.

58 Keysight E364xA User’s and Service Guide

Remote interface operation

CURRent {<current>|MIN|MAX} Set the current.

VOLTage {<voltage>|MIN|MAX} Set the voltage.

OUTPut ON Enable the output.

Operation and Features 2

Keysight E364xA User’s and Service Guide 59

2Operation and Features

NOTE

Constant Current Operation

To set up the power supply for constant current (CC) operation, proceed as follows.

Front panel operation

1 Connect a load to the output terminals.

With power-off, connect a load to the + and – output terminals.

2 Turn on the power supply.

Press to operate the power supply in the high voltage range before proceeding to the next step. The 20V or 60V annunciator turns on depending on which power supply you are using.

3 Set the d isplay to the limit mode.

In constant current mode, the current values between the meter mode and limit mode are the same, but the voltage values are not. Moreover, if the display is in the meter mode, you cannot see the change of voltage limit value when adjusting the knob. We recommend that you should set the display to the limit mode to see the change of voltage limit value in the constant current mode whenever adjusting the knob.

60 Keysight E364xA User’s and Service Guide

Operation and Features 2

NOTE

4 Ad just the knob for the desired voltage limit.

[1]

Check that the Limit annunciator still flashes and the knob is selected for voltage control. The flashing digit can be changed using the resolution keys and the flashing digit can be adjusted by turning the knob. Adjust the knob for the desired voltage limit.

5 Ad just the knob for the desired output current.

[2]

Check that the Limit annunciator still flashes. Set the knob for current control. Change the flashing digit using the resolution selection keys and adjust the knob to the desired output current.

6 Return to the meter mode.

Press or let the display time-out after several seconds to return to the meter mode. Notice that the Limit annunciator turns off and the display shows

the OUTPUT OFF message.

7 Enable the output.

The OFF annunciator turns off and the CC annunciator turns on. Notice that the display is in the meter mode.

8 Verify that the power supply is in the constant current mode.

If you operate the power supply in the constant current (CC) mode, verify that the CC annunciator is lit. If the CV annunciator is lit, choose a higher voltage limit

During actual CC operation, if a load change causes the voltage limit to be

exceeded, the power supply will automatically crossover to constant voltage mode at the preset voltage limit and the output current will drop proportionately.

[1] You can use the resolution selection keys to move the flashing digit to the right or left when setting

the voltage.

[2] You can use the resolution selection keys to move the flashing digit to the right or left when setting

the current.

Keysight E364xA User’s and Service Guide 61

2Operation and Features

Remote interface operation

VOLTage {<voltage>|MIN|MAX}

CURRent {<current>|MIN|MAX}

OUTPut ON

Set the voltage.

Set the current.

Enable the output.

62 Keysight E364xA User’s and Service Guide

Configuring the Remote Interface

NOTE

This power supply is shipped with both a GPIB (IEEE-488) interface and an RS-232 interface. The GPIB interface is selected when the power supply is shipped from the factory. Only one interface can be enabled at a time. To exit the

I/O configuration mode without any changes, press until the NO CHANGE message is displayed.

– You can set the GPIB address, parity, and baud rate from the front panel only.

– The current selection is highlighted for emphasis. All other choices are

dimmed.

– The interface selection is stored in the non-volatile memory, and does not

change when power has been turned off or after a power-on reset (*RST command).

GPIB configuration

1 Turn on the remote configuration mode.

GPIB / 488

Operation and Features 2

If RS-232 appears, select GPIB / 488 by turning the knob.

2 Select the GPIB address.

ADDR 05

You can set the power supply’s address to any value between 0 and 30. The factory setting is address 5.

3 Save the change and exit the menu.

SAVED

Your computer's GPIB interface card has its own address. Be sure to avoid using the computer's address for any instrument on the interface bus. Keysight GPIB interface cards generally use address 21.

Keysight E364xA User’s and Service Guide 63

2Operation and Features

RS-232 configuration

1 Turn on the remote configuration mode.

GPIB / 488

Notice that if you changed the remote interface selection to RS-232 before, the RS-232 message is displayed.

2 Choose the RS-232 interface.

RS-232

You can choose the RS-232 interface by turning the knob.

3 Select the baud rate.

Select one of the following: 300, 600, 1200, 2400, 4800, or 9600 (factory setting) baud.

9600 BAUD

4 Select the parity and number of stop bits.

Select one of the following: None (8 data bits, factory setting), Odd (7 data bits), or Even (7 data bits). When you set the parity, you are also indirectly setting the number of the data bits.

NONE 8 BITS

5 Save the change and exit the menu.

SAVED

64 Keysight E364xA User’s and Service Guide

Storing and Recalling Operating States

You can store up to five different operating states in non-volatile storage locations. When shipped from the factory, storage locations 1 through 5 are empty. You can name a location from the front panel or over the remote interface but you can only recall a named state from the front panel.

The following steps show you how to store and recall an operating state.

To cancel the store/recall operation, select the EXIT menu by turning the knob and then pressing or letting the display time-out.

Front panel operation

Storing the operating state

1 Set up the power supply for the desired operating state.

The storage feature “remembers” the output voltage range selection, the limit value settings of voltage and current, output on/off state, OVP on/off state, and OVP trip levels.

Operation and Features 2

2 Turn on the storage mode.

STORE STATE

From the front panel, you can assign names (up to nine characters) to each of the five stored states. Turn the knob until NAME STATE appears and press

to select the locations. Then press to name the locations.

NAME STATE

1:P15V_TEST

3 Select the storage location

Turn the knob to the right to specify the memory location 2.

2: STATE2

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2Operation and Features

4 Save the operating state.

DONE

Recalling a stored state

1 Turn on the recall mode.

Memory location 1 will be displayed in the recall mode.

1: P15V_TEST

2 Select the stored operating state.

2:STATE2

RESET

You can select the above RESET mode to reset the power supply to the power-on state without turning power off/on or without using the *RST command over the remote interface. Refer to “*RST” on page 117 for more details on the *RST command.

3 Recall the stored operating state.

DONE

Remote interface operation

Use the following commands to store and recall the power supply state.

*SAV {1|2|3|4|5} Store an operating state to a specified location.

*RCL {1|2|3|4|5} Recall a previously stored state from a specified

location.

MEM:STAT:NAME 1, ‘P15V_TEST’ Name the storage location 1 as “P15V_TEST”.

66 Keysight E364xA User’s and Service Guide

Programming the Overvoltage Protection

Overvoltage protection guards the load against output voltages reaching values greater than the programmed protection level. It is accomplished by shorting the output via an internal SCR when the trip level is set to equal or greater than 3 V, or by programming the output to 1 V when the trip level is set to less than 3 V.

The following steps show how to set the OVP trip level, how to check the OVP operation, and how to clear the overvoltage condition.

Front panel operation

Setting the OVP level and enabling the OVP circuit

1Turn on the power supply

2 Enter the OVP menu and set the desired trip level.

LEVEL 22.0V (E3640A)

Use the knob and the resolution selection key or to set the desired trip level. Note that you cannot set the trip levels to lower than 1.0 V.

Operation and Features 2

3 Enable the OVP circuit

OVP ON

4 Exit the OVP menu.

CHANGED

If the OVP settings are not changed, NO CHANGE will be displayed. The power supply will exit the OVP menu and the display will return to the meter mode. Check that the OVP annunciator turns on if the OVP circuit is enabled.

Keysight E364xA User’s and Service Guide 67

2Operation and Features

Checking the OVP operation

To check the OVP operation, raise the output voltage to near the trip point. Then very gradually increase the output by turning the knob until the OVP circuit trips. This will cause the power supply output to drop to near zero, the OVP annunciator to flash, and the CC annunciator to turn on. The OVP TRIPPED message also appears on the display.

Clearing the overvoltage condition

When the OVP condition occurs, the OVP annunciator flashes. When it was caused by an external voltage source such as a battery, disconnect it first. Clear the overvoltage condition by adjusting the output voltage level or by adjusting the OVP trip level.

The following steps show you how to clear the overvoltage condition and return to the normal mode operation. In the following steps, the display will return to OVP TRIPPED if you allow the display to time-out after about several seconds.

– By adjusting the output voltage level

1 Lower the output voltage level below the OVP trip point.

The OVP and Limit annunciators are flashing after is pressed.

2 Check that you lowered the voltage level below the OVP trip point.

The OVP trip point is displayed. Do not adjust the trip point at this step.

3 Select the OVP CLEAR mode by turning the knob.

OVP ON

OVP CLEAR

4 Clear the overvoltage cond ition and exit this menu.

DONE

The OVP annunciator will not flash any more. The output will return to the meter mode.

68 Keysight E364xA User’s and Service Guide

– By adjusting the OVP trip level

NOTE

1 Raise the OVP trip level higher than the level tripped

2 Select the OVP Clear mode by turning the knob.

OVP ON

OVP CLEAR

3 Clear the overvoltage cond ition and exit this menu.

DONE

The OVP annunciator will not flash any more. The output will return to the meter mode.

Remote interface operation

Operation and Features 2

VOLT:PROT {<voltage>|MIN|MAX} Set the OVP level.

VOLT:PROT:STAT {OFF|ON) Disable or enable the OVP circuit.

VOLT:PROT:CLE Clear the tripped OVP circuit.

The power supply’s OVP circuit contains a crowbar SCR, which effectively shorts the output of the power supply whenever the overvoltage cond ition occurs. If an external voltage source such as a battery is connected across the output, and the overvoltage condition inad vertently occurs, the SCR will continuously sink a large current from the source and possibly damaging the power supply. To avoid this, a diode must be connected in series with the output as shown in Figure 2-1.

Keysight E364xA User’s and Service Guide 69

2Operation and Features

Figure 2-1 Recommended protection circuit for battery charging

When the E364xA is powered up or down, the output voltage will overshoot to not more than ±1 V (i.e., +1 V max during power up and –1 V max during power down).

To prevent this voltage overshoot, Keysight recommends you to connect the diode(s) in series at the device-under-test’s (DUT) input supply as shown in

Figure 2-2. This will block any reverse voltage and current flow to the DUT. Note

that this recommendation is only suitable for single output applications.

70 Keysight E364xA User’s and Service Guide

Operation and Features 2

Figure 2-2 Recommended connection to prevent voltage overshoot

Note the following considerations for the diode(s) selection:

– The DUT’s input voltage should consider the voltage drop across the diode.

The typical threshold voltage of a silicon diode is 0.6 V to 0.7 V.

– The series diode selected must have a current specification of 10% to 20%

derating margin.

– Select the zener diode’s voltage according to the DUT’s input voltage rating

and at least 1 watt power rating or higher.

Keysight E364xA User’s and Service Guide 71

2Operation and Features

Disabling the Output

The output of the power supply can be disabled or enabled from the front panel.

– When the power supply is in the Off state, the OFF annunciator turns on and

the output is disabled. The OFF annunciator turns off when the power supply returns to the On state. When the output is disabled, the voltage value is 0 V and the current value is 0.02 A. This gives a zero output voltage without actually disconnecting the output.

– The output state is stored in the volatile memory. The output is always

disabled when power has been turned off or after a remote interface reset.

– While the output is disabled, the control knob is locked to prevent any

unwanted changes from occurring. The other front panel keys are still working.

– To lock the control knob, move the flashing digit to the right or left using the

or resolution selection keys until the flashing digit disappears.

– To see or check the changes while the output is disabled, press before

returning to the meter mode.

Front panel operation

OUTPUT OFF

Remote interface operation

OUTP {OFF|ON}

72 Keysight E364xA User’s and Service Guide

Operation and Features 2

NOTE

Disconnecting the output using an external relay

To disconnect the output, an external relay must be connected between the output and the load. A TTL signal of either low true or high true is provided to control an external relay. This signal can only be controlled with the remote command OUTPut:RELay {OFF|ON}. The TTL output is available on the RS-232 connection pin 1 and pin 9.

When the OUTPut:RELay state is ON, the TTL output of pin 1 is high (4.5 V) and pin 9 is low (0.5 V). The levels are reversed when the OUTPut:RELay The TTL output of pin 1 or pin 9 of the RS-232 connector is available only after

installing two jumpers (JP102 and JP103)

“Component Locator Diagram” on page 233 to locate them.

Do not use the RS-232 interface if you have configured the power supply to output relay control signals. Internal components on the RS-232 circuitry may be damaged.

[1]

inside the power supply. Refer to

tate is OFF.

[1] For serial MY53xx6xxx, the two jumpers are JP751 and JP752.

Keysight E364xA User’s and Service Guide 73

2Operation and Features

System-Related Operations

This section gives information on system-related topics such as storing power supply states, reading errors, running a self-test, displaying messages on the front panel, and reading firmware revisions.

State storage

The power supply has five storage locations in non-volatile memory to store power supply states. The locations are numbered 1 through 5. You can assign a name to each of the locations for use from the front panel.

– You can store the power supply state in any of the five locations. However, you

can only recall a state from a location that contains a previously stored state.

– The power supply stores the following: the state of output range selection,

flashing digit position on the display, the limit value settings of voltage and current, output on/off state, OVP on/off state, and trip levels.

– When shipped from the factory, storage locations 1 through 5 are empty.

– You can assign a name to the storage locations. You can name a location from

the front panel or over the remote interface but you can only recall a named state from the front panel. From the remote interface, you can only recall a stored state using a number (1 through 5).

– The name can contain up to nine characters. A letter (A-Z) or number (0-9) can

be used for the first character to name a state. The underscore character (“_”) can be used for the remaining eight characters. Blank spaces are not allowed. An error is generated if you specify a name with more than nine characters.

–A power-on reset (*RST command) does not affect the configurations stored in

memory. Once a state is stored, it remains until it is overwritten.

74 Keysight E364xA User’s and Service Guide

Operation and Features 2

Front panel operation

STORE STATE, NAME STATE, EXIT

To reset the power supply to the power-on reset state without using the *RST command or turning power off/on, select RESET from the following.

5 states, RESET, EXIT

Remote interface operation

Use the following commands to store and recall power supply states.

*SAV {1|2|3|4|5}

*RCL {1|2|3|4|5}

To assign a name to a stored state to be recalled from the front panel, send the following command. From the remote interface, you can only recall a stored state using a number (1 through 5).

MEM:STAT:NAME 1, ‘P15V_TEST’

Self-test

A power-on self-test occurs automatically when you turn on the power supply. This test assures you that the power supply is operational. This test does not perform the extensive set of tests that are included as part of the complete self-test described below. If the power-on self-test fails, the ERROR annunciator turns on.

A complete self-test performs a series of tests and takes approximately 2 seconds to execute. If all tests pass, you can have a high confidence that the power supply is operational.

If the complete self-test is successful, PASS is displayed on the front panel. If the self-test fails, FAIL is displayed and the ERROR annunciator turns on. Refer to

Chapter 8, "Service and Maintenance" for instructions on returning the power

supply to Keysight for service.

Keysight E364xA User’s and Service Guide 75

2Operation and Features

Front panel operation

To perform the complete front panel self-test, hold down as you turn on the power supply and hold down the key until you hear a long beep. The self-test will

begin when you release the key following the beep.

Remote interface operation

*TST?

Returns 0 if the complete self-test passes or 1 if it fails.

Error conditions

When the front-panel ERROR annunciator turns on, one or more command syntax or hardware errors have been detected. A record of up to 20 errors can be stored in the power supply’s error queue. Refer to Chapter 4, "Error Messages" for more information.

Firmware revision query

The power supply has three microprocessors for control of various internal systems. You can query the power supply to determine which revision of firmware is installed for each microprocessor.

The power supply returns three revision numbers. The first number is the firmware revision number for the main processor; the second is for the input/output processor; and the third is for the front panel processor.

Front panel operation

REV X.X-Y.Y-Z.Z

Press twice to read the system firmware revision numbers.

76 Keysight E364xA User’s and Service Guide

Remote interface operation

*IDN?

The above command returns a string in the form of:

“Keysight Technologies,E3640A,0,X.X-Y.Y-Z.Z” (E3640A)

SCPI language version

This power supply complies with the rules and regulations of the present version of Standard Commands for Programmable Instruments (SCPI). You can determine the SCPI version with which the power supply is in compliance by sending a command from the remote interface.

You can query the SCPI version from the remote interface only.

Remote interface operation

Operation and Features 2

“SYST:VERS?” Query the SCPI version

Returns a string in the form of YYYY.V where the Y represents the year of the version, and the V represents the version number for that year (for example,

1997.0)

Keysight E364xA User’s and Service Guide 77

2Operation and Features

NOTE

GPIB Interface Reference

The GPIB connector on the rear panel connects your power supply to the computer and other GPIB devices. Chapter 1, "Accessories" lists the cables that are available from Keysight. A GPIB system can be connected together in any configuration (star, linear, or both) as long as the following rules are observed:

Each device on the GPIB (IEEE-488) interface must have a unique address. You can set the power supply’s address to any value between 0 and 30. The address is set to 5 when the power supply is shipped from the factory. The GPIB address is displayed at power-on.

You can set the GPIB address from the front panel only.

– The address is stored in the non-volatile memory, and does not change when

power has been turned off or after a power-on reset (*RST command).

– Your computer's GPIB interface card has its own address. Avoid using the

computer's address for any instrument on the interface bus. Keysight GPIB interface cards generally use address 21.

– The total number of devices including the computer is not more than 15.

– The total length of all the cables used is not more than 2 m times the number

of devices connected together, up to a maximum of 20 m.

– Do not stack more than three connector blocks together on any GPIB

connector. Make sure that all connectors are fully seated and that the lock screws are firmly finger tightened.

Refer to “Configuring the Remote Interface” on page 63 for more information on configuring the power supply for remote interface operations from the front panel.

IEEE-488 states that you should exercise caution if your individual cable lengths exceed 4 m.

78 Keysight E364xA User’s and Service Guide

RS-232 Interface Reference

The power supply can be connected to the RS-232 interface using the 9-pin (DB-9) serial connector on the rear panel. The power supply is configured as a Data Terminal Equipment (DTE) device. For all communications over the RS-232 interface, the power supply uses two handshake lines: Data Terminal Ready (DTR, on pin 4) and Data Set Ready (DSR, on pin 6).

The following sections contain information to help you use the power supply over the RS-232 interface. The programming commands for RS-232 are explained on

page 125.

RS-232 configuration overview

Configure the RS-232 interface using the parameters as shown below. Use the front panel key to select the baud rate, parity, and number of data bits (refer to “Configuring the Remote Interface” on page 63 for more information).

– Baud rate: 300, 600, 1200, 2400, 4800, 04 9600 (factory setting)

– Parity and data bits: None/8 data bits (factory setting)

– Number of start bits: 1 bit (fixed)

– Number of stop bits: 2 bits (fixed)

Operation and Features 2

Even/7 data bits, or Odd/7 data bits

RS-232 data frame format

A character frame consists of all the transmitted bits that make up a single character. The frame is defined as the characters from the start bit to the last stop bit, inclusively. Within the frame, you can select the baud rate, number of data bits, and parity type. The power supply uses the following frame formats for seven and eight data bits.

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2Operation and Features

Connection to a computer or terminal

To connect the power supply to a computer or terminal, you must have the proper interface cable. Most computers and terminals are Data Terminal Equipment (DTE) devices. Since the power supply is also a DTE device, you must use a DTE-to-DTE interface cable. These cables are also called null-modem, modem-eliminator, or crossover cables.

The interface cable must also have the proper connector on each end and the internal wiring must be correct. Connectors typically have nine pins (DB-9 connector) or 25 pins (DB-25 connector) with a male or female pin configuration. A male connector has pins inside the connector shell and a female connector has holes inside the connector shell.

If you cannot find the correct cable for your configuration, you may have to use a wiring adapter. If you are using a DTE-to-DTE cable, make sure the adapter is a “straight-through” type. Typical adapters include gender changers, null-modem adapters, and DB-9 to DB-25 adapters.

The cable and adapter diagrams as shown in Figure 2-3 and Figure 2-4 can be used to connect the power supply to most computers or terminals.

DB-9 serial connection

If your computer or terminal has a 9-pin serial port with a male connector, use the null-modem cable included with the Keysight 34398A Cable Kit. This cable has a 9-pin female connector on each end. The cable pin diagram is as shown in

Figure 2-3.

Figure 2-3 DB-9 serial connection

80 Keysight E364xA User’s and Service Guide

DB-25 serial connection

If your computer or terminal has a 25-pin serial port with a male connector, use the null-modem cable and 25-pin adapter included with the Keysight 34398A Cable Kit. The cable and adapter pin diagrams are as shown in Figure 2-4.

Figure 2-4 DB-25 serial connection

RS-232 trouble shooting

Here are a few things to check if you are having problems communicating over the RS-232 interface. If you need additional help, refer to the documentation that came with your computer.

Operation and Features 2

– Verify that the power supply and your computer are configured for the same

baud rate, parity, and number of data bits. Make sure that your computer is set up for one start bit and two stop bits (these values are fixed on the power supply).

– Make sure to execute the SYSTem:REMote command to place the power

supply in the remote mode.

– Verify that you have connected the correct interface cable and adapters. Even

if the cable has the proper connectors for your system, the internal wiring may be incorrect. The Keysight 34398A Cable Kit can be used to connect the power supply to most computers or terminals.

– Verify that you have connected the interface cable to the correct serial port on

your computer (COM1, COM2, etc.).

Keysight E364xA User’s and Service Guide 81

2Operation and Features

NOTE

Calibration

This section gives an overview of the calibration features of the power supply. For more detailed discussion of the calibration procedures, refer to Chapter 8,

"Service and Maintenance".

Calibration security

This feature allows you to enter a security code to prevent accidental or unauthorized calibrations of the power supply. When you first receive your power supply, it is secured. Before you can calibrate the power supply, you must unsecure it by entering the correct security code.

– Table 2- 1 shows the security code for each model when the power supply is

shipped from the factory. The security code is stored in non-volatile memory, and does not change when power has been turned off or after a power-on reset (*RST command).

– The security code may contain up to 11 alphanumeric characters or

underscore character (‘‘_’’). A letter (A-Z) or number (0-9) can be used for the first character. You do not have to use all 11 characters.

_ _ _ _ _ _ _ _ _ _ _ (11 characters)

– When you secure the power supply from the remote interface, use a maximum

of eight alphanumeric characters to unsecure the power supply from the front panel also. For example, the security code for E3640A has less than nine characters.

If you forget your security code, you can disable the security feature by adding a

jumper inside the power supply and then enter a new code. Refer to Chapter 8,

"Service and Maintenance" for more information.

82 Keysight E364xA User’s and Service Guide

Table 2-1 Factory-setting security codes

Model Security code

E3640A 003640

E3641A 003641

E3642A 003642

E3643A 003643

E3644A 003644

E3645A 003645

To unsecure for calibration

You can unsecure the power supply either from the front panel or over the remote interface. The power supply is secured when shipped from the factory. Refer to

Table 2-1 for the factory-setting secure code for your power supply.

Front panel operation

Operation and Features 2

1 Select the calibration mode.

SECURED

If the power supply is secured, the above message is displayed as you turn on the power supply by holding down the (Calibrate) key. Hold down the key

until you hear a long beep and the CAL MODE message is displayed.

2 Enter the security code.

000000

Enter the security code using the control knob and resolution selection keys.

Keysight E364xA User’s and Service Guide 83

2Operation and Features

3 Save the change and exit the menu.

UNSECURED

You will see the above message if the security code is correct, and the CAL MODE message is displayed. To exit the calibration mode, turn the power off

and on.

Notice that if you enter the wrong secure code, INVALID is displayed and the code entering mode is displayed for you to enter the correct code.

Remote interface operation

CAL:SEC:STAT {OFF|ON},<code> Secure or unsecure the power supply.

To unsecure the power supply, send the above command with the same code used to secure. For example,

CAL:SEC:STAT OFF, ‘003640’ (E3640A model)

To secure against calibration

You can secure the power supply against calibration either from the front panel or over the remote interface. The power supply is secured when shipped from the factory.

Read the security code rules at “Calibration security” on page 82 before attempting to secure the power supply.

84 Keysight E364xA User’s and Service Guide

Operation and Features 2

Front panel operation

1 Select the calibration mode.

UNSECURED

If the power supply is unsecured, the above message is displayed as you turn on the power supply by holding down the (Calibrate) key. Hold down the

key until you hear a long beep and the CAL MODE message is displayed.

2 Enter the security code.

000000

Enter the desired security code using the control knob and resolution selection keys.

3 Save the change and exit the menu.

SECURED

The secured setting is stored in non-volatile memory, and does not change when power has been turned off or after a power-on reset (*RST command).

Remote interface operation

CAL:SEC:STAT {OFF|ON},<code> Secure or unsecure the power supply.

To secure the power supply, send the above command with the same code used to unsecure. For example,

“CAL:SEC:STAT ON, ‘003640’” (E3640A model)

Keysight E364xA User’s and Service Guide 85

2Operation and Features

To change the security code

To change the security code, you must first unsecure the power supply, and then enter a new code. Read the security code rules at “Calibration security” on page 82 before attempting to secure the power supply.

Front panel operation

To change the security code, first make sure that the power supply is unsecured. Go to the security code entry, press the (Secure) key after the CAL MODE

message is displayed, enter the new security code using the control knob and resolution selection keys, and then press (Secure) key.

Changing the code from the front panel also changes the code as seen from the remote interface.

Remote interface operation

CAL:SEC:CODE <new code> Change the security code.

To change the security code, first unsecure the power supply using the old security code. Then, enter the new code as shown below.

CAL:SEC:STAT OFF, ‘003640’ Unsecure with the old code.

CAL:SEC:CODE ‘ZZ001443’ Enter the new code.

CAL:SEC:STAT ON, ‘ZZ001443’ Secure with the new code.

86 Keysight E364xA User’s and Service Guide

Calibration count

You can determine the number of times that your power supply has been calibrated. Your power supply was calibrated before it left the factory. When you receive your power supply, read the count to determine its initial value.

The calibration count feature can be performed from the remote interface only.

– The calibration count is stored in non-volatile memory, and it does not change

when power has been turned off or after a remote interface reset.

– The calibration count increments up to a maximum of 32767 after which it

wraps-around to 0. Since the value increments by one for each calibration point, a complete calibration will increase the value by three counts.

Remote interface operation

CAL:COUN? Query the number of times of calibration

Calibration message

The power supply allows you to store one message in calibration memory in the mainframe. For example, you can store such information as the date when the last calibration was performed, the date when the next calibration is due, the power supply’s serial number, or even the name and phone number of the person to contact for a new calibration.

– You can record a calibration message only from the remote interface and only

when the power supply is unsecured. You can read the message from either the front panel or over the remote interface. You can read the calibration message whether the power supply is secured or unsecured.

Operation and Features 2

– The calibration message may contain up to 40 characters. From the front

panel, you can view 11 characters of the message at a time.

– Storing a calibration message will overwrite any message previously stored in

memory.

– The calibration message is stored in non-volatile memory, and does not

change when power has been turned off or after a remote interface reset.

Keysight E364xA User’s and Service Guide 87

2Operation and Features

Front panel operation

To read the calibration message from the front panel, press and turn the knob until CAL STRING is displayed. Press to scroll through the text of the message. Press to increase the scrolling speed.

CAL STRING

Remote interface operation

To store the calibration message, send the following command.

CAL:STR ‘CAL 06-01-99’

88 Keysight E364xA User’s and Service Guide

Keysight E364xA Single Output DC Power Supplies User’s and Service Guide

3 Remote Interface

Reference

SCPI Command Summary 90 Introduction to the SCPI Language 96 Simplified Programming Overview 102 Using the APPLy Command 106 Output Setting and Operation Commands 107 Triggering 112 System-Related Commands 115 State Storage Commands 119 Calibration Commands 121 Interface Configuration Commands 125 SCPI Status Registers 126 Status Reporting Commands 134 Halting an Output in Progress 137 SCPI Conformance Information 138 IEEE-488 Conformance Information 141

This chapter lists the SCPI commands.

3 Remote Interface Reference

NOTE

SCPI Command Summary

If you are a first-time user of the SCPI language, refer to Introduction to the SCPI

Language and Simplified Programming Overview to familiarize with the SCPI

language before attempting to program the power supply.

This section summarizes the SCPI (Standard Commands for Programmable Instruments) commands available to program the power supply over the remote

interface. Refer to the later sections in this chapter for more complete details on each command.

Throughout this manual, the following conventions are used for SCPI command syntax.

– Square brackets ([ ]) indicate optional keywords or parameters.

– Braces ({ }) enclose parameters within a command string.

– Triangle brackets (< >) indicate that you must substitute a value or a code for

the enclosed parameter.

– A vertical bar ( | ) separates one of two or more alternative parameters.

90 Keysight E364xA User’s and Service Guide

Output setting and measurement commands

APPLy {<voltage>|DEF|MIN|MAX}[,{<current>|DEF|MIN|MAX}] APPLy? [SOURce:]

CURRent[:LEVel][:IMMediate][:AMPLitude] {<current>|MIN|MAX|UP|DOWN} CURRent[:LEVel][:IMMediate][:AMPLitude]? [MIN|MAX] CURRent[:LEVel][:IMMediate]:STEP[:INCRement] {<numeric value> |DEFault} CURRent[:LEVel][:IMMediate]:STEP[:INCRement]? {DEFault} CURRent[:LEVel]:TRIGgered[:AMPLitude] {<current>|MIN|MAX} CURRent[:LEVel]:TRIGgered[:AMPLitude]? [MIN|MAX] VOLTage[:LEVel][:IMMediate][:AMPLitude] {<voltage>|MIN|MAX|UP|DOWN} VOLTage[:LEVel][:IMMediate][:AMPLitude]? [MIN|MAX] VOLTage[:LEVel][:IMMediate]:STEP[:INCRement] {<numeric value>|DEFault} VOLTage[:LEVel][:IMMediate]:STEP[:INCRement]? {DEFault} VOLTage[:LEVel]:TRIGgered[:AMPLitude] {<voltage>|MIN|MAX} VOLTage[:LEVel]:TRIGgered[:AMPLitude]? [MIN|MAX] VOLTage:PROTection[:LEVel] {<voltage>|MIN|MAX} VOLTage:PROTection[:LEVel]? {MIN|MAX} VOLTage:PROTection:STATe {0|1|OFF|ON} VOLTage:PROTection:STATe? VOLTage:PROTection:TRIPped? VOLTage:PROTection:CLEar

VOLTage:RANGe {P8V VOLTage:RANGe?

MEASure

[:SCALar]

:CURRent[:DC]? [:VOLTage][:DC]?

[1]

|P20V

[1]

|P35V

[2]

|P60V

[2]

|LOW|HIGH}

Remote Interface Reference 3

[1] Applicable for E3640A, E3642A, and E3644A only.

[2] Applicable for E3641A, E3643A, and E3645A only.

Keysight E364xA User’s and Service Guide 91

3 Remote Interface Reference

Triggering commands

INITiate[:IMMediate] TRIGger[:SEQuence]

:DELay {<seconds>|MIN|MAX} :DELay? :SOURce {BUS|IMM} :SOURce?

*TRG

System-related commands

DISPlay[:WINDow]

[:STATe] {OFF|ON} [:STATe]? :TEXT[:DATA] <quoted string> :TEXT[:DATA]? :TEXT:CLEar

SYSTem

:BEEPer[:IMMediate] :ERRor? :VERSion? :COMMunicate:GPIB:RDEVice:ADDRess <numeric value> :COMMunicate:GPIB:RDEVice:ADDRess?

OUTPut

:RELay[:STATe] {OFF|ON} :RELay[:STATe]? [:STATe] {OFF|ON} [:STATe]?

*IDN? *RST *TST?

92 Keysight E364xA User’s and Service Guide

State storage commands

*SAV {1|2|3|4|5} *RCL {1|2|3|4|5} MEMory:STATe

:NAME {1|2|3|4|5}, <quoted name> :NAME? {1|2|3|4|5}

Calibration commands

CALibration

:COUNt? :CURRent[:DATA] <numeric value> :CURRent:LEVel {MIN|MID|MAX} :SECure:CODE <new code> :SECure:STATe {OFF|ON},<code> :SECure:STATe? :STRing <quoted string> :STRing? :VOLTage[:DATA] <numeric value> :VOLTage:LEVel {MIN|MID|MAX} :VOLTage:PROTection

Remote Interface Reference 3

Interface configuration commands

SYSTem

:INTerface {GPIB|RS232} :LOCal :REMote :RWLock

Keysight E364xA User’s and Service Guide 93

3 Remote Interface Reference

Status reporting commands

STATus:QUEStionable

:CONDition? [:EVENt]? :ENABle <enable value>

:ENABle? SYSTem:ERRor? *CLS *ESE <enable value> *ESE? *ESR? *OPC *OPC? *PSC {0|1} *PSC? *SRE <enable value> *SRE? *STB? *WAI

94 Keysight E364xA User’s and Service Guide

IEEE-488.2 common commands

*CLS *ESR? *ESE <enable value> *ESE? *IDN? *OPC *OPC? *PSC {0|1} *PSC? *RST *SAV {1|2|3} *RCL {1|2|3} *STB? *SRE <enable value> *SRE? *TRG *TST? *WAI

Remote Interface Reference 3

Keysight E364xA User’s and Service Guide 95

3 Remote Interface Reference

Introduction to the SCPI Language

SCPI (Standard Commands for Programmable Instruments) is an ASCII-based instrument command language designed for test and measurement instruments. Refer to Simplified Programming Overview for an introduction to the basic techniques used to program the power supply over the remote interface.

SCPI commands are based on a hierarchical structure, also known as a tree system. In this system, associated commands are grouped together under a common node or root, thus forming subsystems. A portion of the SOURce subsystem is shown below to illustrate the tree system.

[SOURce:]

CURRent {<current>|MIN|MAX|UP|DOWN}

CURRent? [MIN|MAX]

CURRent:

TRIGgered {<current>|MIN|MAX}

TRIGgered?{MIN|MAX} VOLTage {<voltage>|MIN|MAX|UP|DOWN} VOLTage? [MIN|MAX] VOLTage:

TRIGgered {<voltage>|MIN|MAX}

TRIGgered? {MIN|MAX}

SOURce is the root keyword of the command, CURRent and VOLTage are

second-level keywords, and TRIGgered is third-level keywords. A colon (:) separates a command keyword from a lower-level keyword.

96 Keysight E364xA User’s and Service Guide

Command format used in this manual

The format used to show commands in this manual is shown below:

CURRent {<current>|MINimum|MAXimum|UP|DOWN}

The command syntax shows most commands (and some parameters) as a mixture of upper- and lower-case letters. The upper-case letters indicate the abbreviated spelling for the command. For shorter program lines, send the abbreviated form. For better program readability, send the long form.

For example, in the above syntax statement, CURR and CURRENT are both acceptable forms. You can use upper- or lower-case letters. Therefore, CURRENT, curr, and Curr generate an error.

are all acceptable. Other forms, such as CUR and CURREN, will

Remote Interface Reference 3

Braces (

{}

) enclose the parameter choices for a given command string. The

braces are not sent with the command string.

A vertical bar (

) separates multiple parameter choices for a given command

string.

Triangle brackets (

) indicate that you must specify a value for the enclosed parameter. For example, the above syntax statement shows the current parameter enclosed in triangle brackets. The brackets are not sent with the command string. You must specify a value for the parameter (such as “CURR 0.1”).

Some parameters are enclosed in square brackets (

[]

). The brackets indicate that the parameter is optional and can be omitted. The brackets are not sent with the command string. If you do not specify a value for an optional parameter, the power supply chooses a default value.

Some portions of commands are enclosed in square brackets (

[]

). The brackets indicate that this portion of the command is optional. Most optional portions of the command are not shown in the command description. For the full command showing all the options, refer to “SCPI Command Summary” on page 90.

A colon ( : ) separates a command keyword from a lower-level keyword. You must insert a blank space to separate a parameter from a command keyword. If a command requires more than one parameter, you must separate adjacent parameter using a comma as shown below:

“SOURce:CURRent:TRIGgered” “APPLy 3.5,1.5”

Keysight E364xA User’s and Service Guide 97

3 Remote Interface Reference

Command separators

A colon ( : ) is used to separate a command keyword from a lower-level keyword as shown below:

“SOURce:CURRent:TRIGgered”

A semicolon ( ; ) is used to separate two commands within the same subsystem, and can also minimize typing. For example, sending the following command string:

“SOUR:VOLT MIN;CURR MAX”

is the same as sending the following two commands:

“SOUR:VOLT MIN”

“SOUR:CURR MAX”

Use a colon and a semicolon to link commands from different subsystems. For example, in the following command string, an error is generated if you do not use the colon and semicolon:

“DISP:TEXT:CLE;:SOUR:CURR MIN”

Using the MIN and MAX parameters

You can substitute MINimum or MAXimum in place of a parameter for many commands. For example, consider the following command:

CURRent {<current>|MIN|MAX}

Instead of selecting a specific current, you can substitute MINimum to set the current to its minimum value or MAXimum to set the current to its maximum value.

98 Keysight E364xA User’s and Service Guide

Querying parameter settings

CAUTION

You can query the value of most parameters by adding a question mark (?) to the command. For example, the following command sets the output current to 5 A:

“CURR 5”

You can query the value by executing:

“CURR?”

You can also query the minimum or maximum value allowed with the present function as follows:

“CURR? MAX”

“CURR? MIN”

If you send two query commands without reading the response from the first, and the attempt to read the second response, you may receive some data from the first response followed by the complete second response. To avoid this, do not send a query command without reading the response. When you cannot avoid this situation, send a device clear before sending the second query command.

Remote Interface Reference 3

SCPI command terminators

A command string sent to the power supply must terminate with a character. The IEEE-488 EOI (end-or-identify) message is interpreted as a

line>

character and can be used to terminate a command string in place of a

character. A

followed by a

accepted. Command string termination will always reset the current SCPI command path to the root level. The

character has the ASCII decimal

code of 10.

Keysight E364xA User’s and Service Guide 99

<new

is also

3 Remote Interface Reference

IEEE-488.2 common commands

The IEEE-488.2 standard defines a set of common commands that perform functions like reset, self-test, and status operations. Common commands always begin with an asterisk ( * ), are four to five characters in length, and may include one or more parameters. The command keyword is separated from the first parameter by a blank space. Use a semicolon ( ; ) to separate multiple commands as shown below:

“*RST; *CLS; *ESE 32; *OPC?”

SCPI parameter types

The SCPI language defines several different data formats to be used in program messages and response messages.

Numeric parameters

Commands that require numeric parameters will accept all commonly used decimal representations of numbers including optional signs, decimal points, and scientific notation. Special values for numeric parameters like MINimum, MAXimum, and DEFault are also accepted. You can also send engineering unit suffixes (V, A or SEC) with numeric parameters. If only specific numeric values are accepted, the power supply will automatically round the input numeric parameters. The following command uses a numeric parameter:

CURR {<current>|MIN|MAX|UP|DOWN}

Discrete parameters

Discrete parameters are used to program settings that have a limited number of values (like BUS, IMM). Query responses will always return the short form in all upper-case letters. The following command uses discrete parameters:

TRIG:SOUR {BUS|IMM}

100 Keysight E364xA User’s and Service Guide

Remote Interface Reference 3

Boolean parameters

Boolean parameters represent a single binary condition that is either true or false. For a false condition, the power supply will accept “OFF” or “0”. For a true condition, the power supply will accept “ON” or “1”. When you query a boolean setting, the power supply will always return “0” or “1”. The following command uses a boolean parameter:

DISP {OFF|ON}

Strings parameters

String parameters can contain virtually any set of ASCII characters. A string must begin and end with matching quotes; either with a single quote or with a double quote. You can include the quote delimiter as part of the string by typing it twice without any characters in between. The following command uses a string parameter:

DISP:TEXT <quoted string>

Keysight E364xA User’s and Service Guide 101

3 Remote Interface Reference

Simplified Programming Overview

This section gives an overview of the basic techniques used to program the power supply over the remote interface. This section is only an overview and does not give all of the details you will need to write your own application programs. Refer to the remainder of this chapter and also Chapter 5, "Application Programs", for more details and examples. Also refer to the programming reference manual that came with your computer for details on outputting command strings and entering data.

Using the APPLy command

The APPLy command provides the most straightforward method to program the power supply over the remote interface. For example, the following statement executed from your computer will set the power supply to an output of 3 V rated at 1 A:

“APPL 3.0, 1.0”

Using the low-level commands

Although the APPLy command provides the most straightforward method to program the power supply, the low-level commands give you more flexibility to change individual parameters. For example, the following statements executed from your computer will set the power supply to an output of 3 V rated at 1 A:

“VOLT 3.0”

“CURR 1.0”

102 Keysight E364xA User’s and Service Guide

Set output voltage to 3.0 V

Set output current to 1.0 A

Keysight Technologies E364xA Series, E3641A, E3640A, E3642A, E3643A User's And Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Symbols

Safety Considerations

Safety and EMC Requirements

Safety compliance

EMC compliance

Environmental Conditions

Regulatory Markings

Waste Electrical and Electronic Equipment (WEEE) Directive

Product category:

Sales and Technical Support

Table of Contents

List of Figures

List of Tables

1 Getting Started

Introduction

Standard Shipped Items

Options

Accessories

Preparing the Power Supply

Checking the power supply

Connecting power to the power supply

Checking the output

Converting line voltage

Adjusting the carrying handle

Rack-mounting the power supply

Product at a glance

Front panel

Rear panel

Display annunciators

Output Connections

Current ratings

Voltage drops

Load consideration

Remote voltage sensing connections

Multiple loads

Operating the Power Supply

Cooling

Bench operation

Cleaning

2 Operation and Features

Overview

Constant Voltage Operation

Front panel operation

Remote interface operation

Constant Current Operation

Front panel operation

Remote interface operation

Configuring the Remote Interface

GPIB configuration

RS-232 configuration

Storing and Recalling Operating States

Front panel operation

Remote interface operation

Programming the Overvoltage Protection

Front panel operation

Remote interface operation

Disabling the Output

Disconnecting the output using an external relay

System-Related Operations

State storage

Self-test

Error conditions

Firmware revision query

SCPI language version

GPIB Interface Reference

RS-232 Interface Reference

RS-232 configuration overview

RS-232 data frame format

Connection to a computer or terminal

RS-232 trouble shooting

Calibration

Calibration security

To unsecure for calibration

To secure against calibration

To change the security code

Calibration count