Keysight E364xA Dual Output DC Power Supplies
User’s and
Service Guide
Notices
CAUTION
WARNING
© Keysight Technologies, 2000 - 2014
No part of this manual may be reproduced in
any form or by any means (including electronic storage and retrieval or translation
into a foreign language) without prior agreement and written consent from Keysight
Technologies as governed by United States
and international copyright laws.
Manual Part Number
E3646-90001
Edition
Edition 11, November 2014
Keysight Technologies
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Warranty
The material contained in this document is
provided “as is,” and is subject to change,
without notice, in future editions. Further,
to the maximum extent permitted by the
applicable law, Keysight disclaims all
warranties, either express or implied, with
regard to this manual and any information
contained herein, including but not limited
to the implied warranties of merchantability and fitness for a particular purpose.
Keysight shall not be liable for errors or for
incidental or consequential damages in
connection with the furnishing, use, or
performance of this document or of any
information contained herein. Should Keysight and the user have a separate written
agreement with warranty terms covering
the material in this document that conflict
with these terms, the warranty terms in
the separate agreement shall control.
Technology Licenses
The hardware and or software described in
this document are furnished under a license
and may be used or copied only in accordance with the terms of such license.
Restricted Rights Legend
U.S. Government Restricted Rights. Software and technical data rights granted to
the federal government include only those
rights customarily provided to end user customers. Keysight provides this customary
commercial license in Software and technical data pursuant to FAR 12.211 (Technical
Data) and 12.212 (Computer Software) and,
for the Department of Defense, DFARS
252.227-7015 (Technical Data - Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Computer Software Documentation).
Safety Notices
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the likes
of 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 likes of 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.
II 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)
DC (Direct current or voltage)
AC (Alternating current or voltage) Positive binding post
Protective conductor terminal Negative binding post
Out position of a bi-stable push control
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.
E364xA User’s and Service Guide III
Safety Considerations
CAUTION
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.
• 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.
IV E364xA User’s and Service Guide
WARNING
• 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.
E364xA User’s and Service Guide V
This power supply is a Safety Class I instrument, which means that it has a
protective earth terminal. This terminal must be connected to earth ground
through a power source with a 3-wire ground receptacle.
Before installation or operation, check the power supply and review this
manual for safety markings and instructions. Safety information for
specific procedures is located at the appropriate places in this manual.
Safety and EMC Requirements
This power supply is designed to comply with the following safety and
Electromagnetic Compatibility (EMC) requirements:
• IEC61326-1:2005/EN61326-1:2006
• Canada: ICES/NMB-001: Issue 4, June 2006
• Australia/New Zealand: AS/NZS CISPR11:2004
• IEC 61010-1:2001/EN 61010-1:2001
• Canada: CAN/CSA-C22.2 No. 61010-1-04
• USA: ANSI/UL 61010-1:2004
Environmental Conditions
This instrument is designed for indoor use. The table below shows the
general environmental requirements for this instrument.
Environmental condition Requirements
Te m p e r a t u r e
Operating condition
• 0 °C to 40 °C (full rated output)
Storage condition
• –20 °C to 70 °C
Humidity
Altitude Up to 2000 m
Installation category II (for indoor use)
Pollution degree 2
Operating condition
• 95% RH (maximum)
VI E364xA User’s and Service Guide
Regulatory Markings
The CE mark is a registered trademark
of the European Community. This CE
mark shows that the product complies
with all the relevant European Legal
Directives.
The C-tick mark is a registered
trademark of the Spectrum
Management Agency of Australia. This
signifies compliance with
the Australia EMC Framework
regulations under the terms of the
Radio Communication Act of 1992.
ICES/NMB-001 indicates that this ISM
device complies with the Canadian
ICES-001.
Cet appareil ISM est confomre 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.
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.
E364xA User’s and Service Guide VII
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard
this electrical or electronic product in domestic household waste.
Product Category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service
Center, or visit
www.keysight.com/environment/product
for more information.
VIII E364xA User’s and Service Guide
Declaration of Conformity (DoC)
NOTE
The Declaration of Conformity (DoC) for this instrument is available on the
Keysight Web site. You can search the DoC by its product model or
description at the Web address below.
http://www.keysight.com/go/conformity
If you are unable to search for the respective DoC, contact your local
Keysight representative.
E364xA User’s and Service Guide IX
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X E364xA User’s and Service Guide
Table of Contents
1 Getting Started
Introduction 2
Standard Shipped Items 6
Options 6
Accessories 7
Preparing the Power Supply 8
Checking the power supply 8
Connecting power to the power supply 9
Checking the output 10
Converting line voltage 12
Rack-mounting the power supply 14
Product at a Glance 17
Front panel 17
Rear panel 20
Display annunciators 21
Output Connections 23
Current ratings 23
Voltage drops 24
Load consideration 24
Remote voltage sensing connections 26
Multiple loads 29
Operating the Power Supply 30
Cooling 30
Bench operation 30
Cleaning 30
2 Operation and Features
Overview 32
E364xA User’s and Service Guide XI
Constant Voltage Operation 34
Front panel operation 34
Remote interface operation 36
Constant Current Operation 36
Front panel operation 36
Remote interface operation 38
Track Mode Operation 38
Front panel operation 39
Remote interface operation 39
View Menu Operation 40
Changing the display mode 40
Viewing the errors 41
Viewing the firmware revision 41
Viewing the calibration string 42
Configuring the Remote Interface 42
GPIB configuration 43
RS-232 configuration 43
Storing and Recalling Operating States 44
Front panel operation 44
Remote interface operation 46
Programming the Overvoltage Protection 46
Front panel operation 46
Remote interface operation 49
Disabling the Output 50
Front panel operation 50
Remote interface operation 50
Disconnecting the output using an external relay 51
System-Related Operations 52
State storage 52
Self-test 53
XII E364xA User’s and Service Guide
Error conditions 54
Firmware revision query 54
SCPI language version 55
GPIB Interface Reference 56
RS-232 Interface Reference 57
RS-232 configuration overview 57
RS-232 data frame format 58
Connection to a computer or terminal 58
RS-232 troubleshooting 60
Calibration 61
Calibration security 61
To unsecure for calibration 62
To secure against calibration 63
To change the security code 64
Calibration count 65
Calibration message 66
3 Remote Interface Reference
SCPI Command Summary 68
Introduction to the SCPI Language 74
Command format used in this manual 75
Command separators 76
Using the MIN and MAX parameters 77
Querying parameter settings 77
SCPI command terminators 78
IEEE-488.2 common commands 78
SCPI parameter types 78
Simplified Programming Overview 80
Using the APPLy command 80
Using the low-level commands 80
Reading a query response 81
E364xA User’s and Service Guide XIII
Selecting a trigger source 81
Power supply programming ranges 82
Using the APPLy Command 83
APPLy {<voltage>| DEF | MIN | MAX}[,{<current>| DEF | MIN
| MAX}] 83
APPLy? 83
Output Settings and Operation Commands 84
Triggering Commands 92
Trigger source choices 92
Triggering commands 94
System-Related Commands 95
State Storage Commands 99
Calibration Commands 101
Calibration example 104
Interface Configuration Commands 106
SCPI Status Registers 107
What is an event register? 107
What is an enable register? 107
What is a multiple logical output? 108
SCPI status system 109
Questionable Status register 110
Standard Event register 112
Status byte register 114
Using service request (SRQ) and serial poll 115
Using *STB? to read the Status Byte 116
Using the Message Available Bit (MAV) 116
Using SRQ to interrupt the bus controller 117
Determining when a command sequence is completed 117
Using *OPC to signal when data is in the output buffer 118
Status Reporting Commands 119
XIV E364xA User’s and Service Guide
Halting an Output in Progress 124
SCPI Conformance Information 125
SCPI confirmed commands 125
Device-specific commands 127
IEEE-488 Conformance Information 128
Dedicated hardware lines 128
Addressed commands 128
IEEE-488.2 common commands 129
4 Error Messages
Overview 132
Front panel operation 132
Remote interface operation 133
Execution Error Messages 134
Self-Test Error Messages 139
Calibration Error Messages 141
5 Application Programs
Overview 144
Example Program for C and C++ 145
Example Program for Excel 97 149
6 Tutorial
Overview of the Power Supply Operation 156
Output Characteristics 158
Unregulated state 160
Unwanted signals 160
Extending the Voltage Range and Current Range 163
Series connections 163
E364xA User’s and Service Guide XV
Parallel connections 164
Remote Programming 165
7 Characteristics and Specifications
Physical Characteristics 170
Environmental Characteristics 172
Electrical Specifications 172
Supplemental Characteristics 174
8 Service and Maintenance
Overview 178
Operating Checklist 179
Types of Service Available 180
Standard repair service (worldwide) 180
Repacking for Shipment 181
Electrostatic Discharge (ESD) Precautions 182
Surface Mount Repair 183
Replacing the Power-Line Fuse 183
Troubleshooting Hints 184
Unit reports errors 740 to 755 184
Unit fails self-test 184
Bias supplies problems 185
Self-Test Procedures 186
Power-on self-test 186
Complete self-test 186
General Disassembly 188
Recommended Test Equipment 189
XVI E364xA User’s and Service Guide
Test Considerations 191
Operation Verification and Performance Tests 192
Operation verification tests 192
Performance tests 192
Measurement Techniques 193
Common test setup 193
Current-monitoring resistor 194
General measurement techniques 194
Electronic load 195
Programming 195
Constant Voltage (CV) Verifications 196
Constant voltage test setup 196
Voltage programming and readback accuracy 196
CV load effect (load regulation) 198
CV source effect (line regulation) 199
CV PARD (ripple and noise) 200
Load transient response time 202
Constant Current (CC) Verifications 204
Constant current test setup 204
Current programming and readback accuracy 204
CC load effect (load regulation) 206
CC source effect (line regulation) 207
CC PARD (ripple and noise) 208
Common Mode Current Noise 210
Performance Test Record 211
Calibration Reference 214
Keysight calibration services 214
Calibration interval 214
To unsecure the power supply without the security code 214
General Calibration or Adjustment Procedure 216
E364xA User’s and Service Guide XVII
Front panel voltage and current calibration 217
Calibration Record 221
Calibration Error Messages 222
Component Locator Diagram 225
Component locator diagram for the main board assembly —
top 225
Component locator diagram for the main board assembly —
bottom 226
Component locator diagram for the digital board assembly —
top 227
Component locator diagram for the digital board assembly —
bottom 228
Component locator diagram for the front panel — top 229
Component locator diagram for the main board assembly — top
(serial MY53xx6xxx) 230
Component locator diagram for the main board assembly —
bottom (serial MY53xx6xxx) 231
Component locator diagram for the digital board assembly —
top (serial MY53xx6xxx) 232
Component locator diagram for the digital board assembly —
bottom (serial MY53xx6xxx) 233
Component locator diagram for the front panel — top (serial
MY53xx6xxx) 234
XVIII E364xA User’s and Service Guide
List of Figures
Figure 1-1 Rear output terminals 5
Figure 1-2 Line voltage selector (set for 115 Vac) 12
Figure 1-3 Front panel 17
Figure 1-4 Voltage and current limit settings 19
Figure 1-5 Rear panel 20
Figure 1-6 Display annunciators 21
Figure 1-7 Remote voltage sensing connections 26
Figure 2-1 Recommended protection circuit for battery
charging 49
Figure 2-2 DB-9 serial connection 59
Figure 2-3 DB-25 serial connection 60
Figure 3-1 Multiple logical output 108
Figure 3-2 SCPI status system 109
Figure 5-1 Example program result 149
Figure 6-1 Diagram of a simple series power supply 156
Figure 6-2 Block diagram of the power supply showing the remote
interface isolation 157
Figure 6-3 Ideal constant voltage power supply 158
Figure 6-4 Ideal constant current power supply 158
Figure 6-5 Output characteristics 159
Figure 6-6 Simplified diagram of the common mode and normal
mode sources of noise 162
Figure 6-7 Speed of response — programming up (full load) 165
Figure 6-8 Speed of response — programming down 166
Figure 7-1 E364xA dimensions 170
Figure 7-2 E364xA dimensions for rack-mounting 171
Figure 8-1 General disassembly 188
Figure 8-2 Performance verification test setup 193
Figure 8-3 Front or rear panel terminal connections 194
Figure 8-4 CV PARD (ripple and noise) 201
Figure 8-5 Transient response time 203
Figure 8-6 CC PARD connections (ripple and noise) 209
E364xA User’s and Service Guide XIX
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XX E364xA User’s and Service Guide
List of Tables
Table 1-1 E364xA options 6
Table 1-2 E364xA accessories 7
Table 1-3 E364xA power-line fuse 9
Table 1-4 Front panel overview 17
Table 1-5 Rear panel overview 20
Table 1-6 Display annunciators overview 21
Table 1-7 Wire rating 23
Table 2-1 Factory-setting security codes 62
Table 3-1 SCPI command summary 69
Table 3-2 Keysight E364xA programming ranges 82
Table 3-3 Power supply state 98
Table 3-4 Bit definitions — Questionable Status register 110
Table 3-5 Bit definitions — Standard Event register 112
Table 3-6 Bit definitions — Status Byte summary register 114
Table 3-7 SCPI confirmed commands 125
Table 3-8 Non-SCPI commands 127
Table 4-1 Execution error messages 134
Table 4-2 Self-test error messages 139
Table 4-3 Calibration error messages 141
Table 7-1 Physical characteristics 170
Table 7-2 Electrical specifications 172
Table 7-3 Supplemental characteristics 174
Table 8-1 Bias supplies voltages 185
Table 8-2 Bias supplies voltages (serial MY53xx6xxx) 185
Table 8-3 Self-test error messages 186
Table 8-4 Recommended test equipment 189
Table 8-5 Verification programming values 196
Table 8-6 CV performance test record 211
Table 8-7 CC performance test record 212
Table 8-8 Parameters for calibration 216
Table 8-9 Calibration record 221
Table 8-10 Calibration error messages 222
E364xA User’s and Service Guide XXI
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XXII E364xA User’s and Service Guide
E364xA Dual Output DC Power Supplies
User’s and Service Guide
1 Getting Started
Introduction 2
Standard Shipped Items 6
Preparing the Power Supply 8
Product at a Glance 17
Output Connections 23
Operating the Power Supply 30
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.
1Getting Started
Introduction
Introduction
The Keysight E3646A/E3647A (30 W) and E3648A/E3649A
(50 W) are high performance dual 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
• Dual 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
• Tracking operation
• Easy- to- use controls
• Remote voltage sensing
• Front and rear output terminals
• Portable, ruggedized case with non- skid feet
• 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 adjustments
2 E364xA User’s and Service Guide
Getting Started 1
Introduction
The E364xA power supplies feature a combination of
programming capabilities and linear power supply
performance that makes them ideal for power systems
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
• Dual 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 (1 or 2) and output voltage range selection
• Enabling or disabling OVP
• OVP trip level setting and condition clearing
• 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
• Changing the display mode (V- V, I- I, or V- I display)
E364xA User’s and Service Guide 3
1Getting Started
Introduction
• Viewing the errors, calibration string, or system firmware
revision
• Enabling or disabling the Tracking mode
• Calibrating the power supply, including changing the
calibration secure code
• Configuring the remote interface
• Enabling or disabling the output
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.
4 E364xA User’s and Service Guide
Getting Started 1
WARNING
Introduction
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.
E364xA User’s and Service Guide 5
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).
1Getting Started
Standard Shipped Items
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 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
Tab l e 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 5063-9243)
OL2 Extra English manual set (local language manual files are included in the
CD-ROM, Keysight part number 5964-8251)
6 E364xA User’s and Service Guide
“Converting line voltage” on page 12.
Accessories
The accessories listed below may be ordered from your local
Keysight Sales Office either with the power supply or
separately.
Tab l e 1 - 2 E364xA accessories
Part number Description
10833A GPIB cable, 1 m (3.3 ft.)
10833B GPIB cable, 2 m (6.6 ft.)
34398A • RS-232, 9 pin (f) to 9 pin (f), 2.5 m (8.2 ft.) cable
• 9 pin (f) to 25 pin (m) adapter
Getting Started 1
Standard Shipped Items
E364xA User’s and Service Guide 7
1Getting Started
Display
Limit
Display
Limit
NOTE
Preparing the Power Supply
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 6. 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
turn on the power supply. If the power supply does not
turn on properly, refer to
“Connecting power to the power
supply” on page 9.
3 Perform a complete self- 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.
as you
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.
8 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
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.
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.
Chapter 8, “Service and Maintenance” for
Getting Started 1
Preparing the Power Supply
Tab l e 1 - 3 E364xA power-line fuse
Model Keysight part number Part description
E3646A
E3647A
E3648A
E3649A
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
2110-0996 Fuse 4 A T 250 V for 100 Vac and 115 Vac
2110-1548 Fuse 2 A T 250 V for 230 Vac
E364xA User’s and Service Guide 9
1Getting Started
NOTE
Power
On/Off
Output
1
Preparing the Power Supply
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
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 outputs are disabled (the OFF annunciator turns on),
and its output1 and low voltage range are selected. The
OVP1, OVP2, OUT1, and low voltage range indication
annunciators turn on (for example, the 8 V annunciator
turns on for the E3646A model), and the knob is selected
for the 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.
Chapter 8, “Service and
[1]
[1] You can use the resolution selection keys to move the flashing digit to the right
or left when setting the voltage.
10 E364xA User’s and Service Guide
Getting Started 1
Power
On/Off
Output
Display
Limit
Display
Limit
Current
Vol tag e
1
Preparing the Power Supply
Current output check
The following steps check the basic current functions with a
short across the power supply’s output.
1 Turn 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
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 Adjust 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
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.
7 Turn off the power supply and remove the short from the
output terminals.
Table 1- 7 for more information.
key again
[1]
[1] You can use the resolution selection keys to move the flashing digit to the right
or left when setting the current.
E364xA User’s and Service Guide 11
1Getting Started
WARNING
230 V
100 V
115 V
Top v ie w
Preparing the Power Supply
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. Refer to “Gen
page 188.
3 Set the two sections of the line voltage selector switch on
th
e PC board for the desired line voltage. Refer to
Figure 1- 2.
4 Refer to “Repl
ace the power- line fuse” on page 13 to
check the rating of the power-line fuse and replace with
e correct one if necessary.
th
5 Replace th
e cover and mark the power supply clearly with
a tag or label indicating the correct line voltage and fuse
that is in use.
eral Disassembly” on
12 E364xA User’s and Service Guide
Figure 1-2 Line voltage selector (set for 115 Vac)
Getting Started 1
Preparing the Power Supply
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.
3 Replace with the correct fuse.
E364xA User’s and Service Guide 13
1Getting Started
NOTE
NOTE
Preparing the Power Supply
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.
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 E3646A,
E3647A, E3648A, or E3649A.
Remove the front and rear rubber bumpers before rack-mounting
the instrument.
14 E364xA User’s and Service Guide
Getting Started 1
Front Rear (bottom view)
Preparing the Power Supply
1 To remove the front bumper, stretch a corner and then
slide it off.
2 To remove the rear bumper, pull the bumper off from the
top as there are potrusions on the sides and bottom of
the cover.
3 To rack-mount a single instrument, order the adapter kit
(5063- 9243).
4 To rack-mount two instruments of the same depth
side- by- side, order the lock- link kit (5061- 9694) and
rack- mount kit (5063- 9214).
E364xA User’s and Service Guide 15
1Getting Started
Preparing the Power Supply
5 To install two instruments in a sliding support shelf,
order the support shelf (5063- 9256) and the slide kit
(1494- 0015).
16 E364xA User’s and Service Guide
Product at a Glance
Front panel
Getting Started 1
Product at a Glance
Figure 1-3 Front panel
Tab l e 1 - 4 Front panel overview
No Item Description
1 Output 1 selection key Select the output 1 voltage and current to be controlled and
monitored on the display.
2 Output 2 selection key Select the output 2 voltage and current to be controlled and
monitored on the display.
E364xA User’s and Service Guide 17
1Getting Started
Product at a Glance
Tab l e 1 - 4 Front panel overview (continued)
No Item Description
3 Low voltage range selection key Select the low voltage range and allow its full rated output to the
output terminals.
4 High voltage range selection key Select the high voltage range and allow its full rated output to the
output terminals.
5 Overvoltage protection key Enable or disable the overvoltage protection function, set the trip
voltage level, and clear the overvoltage condition.
6 Display limit key Display the voltage and current limit values on the display and allow
the knob adjustment for setting the limit values.
7 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.
8 Voltage/Current adjust selection key Select the knob control function for voltage or current adjustment.
9 Knob Increase or decrease the value of the flashing digit by turning
clockwise or counter-clockwise.
10 Output On/Off key Enable or disable the power supply output. This key toggles between
on and off.
[1]
11 I/O configuration menu/Secure key
12 View menu/Calibrate key
13 State storage menu/Local key
[2]
[3]
Configure the power supply for remote interfaces, or secure or
unsecure the power supply for calibration.
View the error codes and the text of the error message, calibration
string, and system firmware revision, or enable the calibration mode.
Store up to five power supply states and assign a name to each of the
storage locations, or return the power supply to the local mode from
the remote interface mode.
14 Stored state Recall/Reset key Recall a stored operating state from location 1 through 5 and reset
the power supply to the power-on state (*RST command).
15 Tracking enabling/disabling key Enable or disable the track mode of the outputs.
[1] You can use it as the Secure or Unsecure key when the power supply is in the calibration mode.
[2] You can enable the calibration mode by holding down this key when you turn on the power supply.
[3] The key can be used as the Local key when the power supply is in the remote interface mode.
18 E364xA User’s and Service Guide
Getting Started 1
+
+
Low
High
Or
1
2
Or
Display
Limit
Display
Limit
Current
Vol tag e
On/Off
Output
NOTE
Product at a Glance
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 output and voltage range using the
output selection keys and the voltage range selection keys
after turning on the power supply.
2 Press to show the limit values on the display.
3 Move the blinking digit to the appropriate position using
the resolution 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
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.
again.
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.
E364xA User’s and Service Guide 19
1Getting Started
Product at a Glance
Rear panel
Figure 1-5 Rear panel
Tab l e 1 - 5 Rear panel overview
No Description
1 AC inlet
2 Power-line fuse-holder assembly
3 Power-line module
4 Output 1 rear output terminals
5 Output 2 rear output terminals
20 E364xA User’s and Service Guide
Tab l e 1 - 5 Rear panel overview (continued)
No Description
6 GPIB (IEEE-488) interface connector
7 RS-232 interface connector
Display annunciators
Getting Started 1
Product at a Glance
Figure 1-6 Display annunciators
Tab l e 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.
[1]
/35V
[1]
/60V
[2]
[2]
Indicate that the low voltage range is selected.
Indicate that the high voltage range is selected.
overvoltage protection circuit has caused the power supply to shut down when the annunciator blinks.
8V
20V
OUT1 The output1 is selected for the front panel or remote operation.
OUT2 The output2 is selected for the front panel or remote operation.
OVP1 The output1 overvoltage protection function is enabled when the OVP1 annunciator turns on or the
E364xA User’s and Service Guide 21
1Getting Started
NOTE
Display
Limit
Product at a Glance
Tab l e 1 - 6 Display annunciators overview (continued)
Item Description
OVP2 The output2 overvoltage protection function is enabled when the OVP2 annunciator turns on or the
overvoltage protection circuit has caused the power supply to shut down when the annunciator blinks.
CAL The power supply is in the calibration mode.
Limit The display shows the limit values of the voltage and current.
ERROR 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 50 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.
TRACK The output1 and output2 are in the track mode.
[1] For E3646A and E3648A power supplies.
[2] For E3647A and E3649A power supplies.
To review the display annunciators, hold down as you turn on the
power supply.
22 E364xA User’s and Service Guide
Output Connections
CAUTION
NOTE
Getting Started 1
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
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 Gauge (AWG) 24 to AWG 14.
When making load connections from the rear output terminals, four load
wire connection is recommended to keep good CV load regulation if
carrying the full-rated current of the power supply.
Chapter 7.
Tab l e 1 - 7 Wire rating
AWG 10121416182022242628
Suggested maximum
current (amperes)
mΩ/ft 1.001.592.534.026.3910.216.125.740.864.9
mΩ/m 3.3 5.2 8.3 13.2 21.0 33.5 52.8 84.3 133.9 212.9
[1] Single conductor in free air at 30 °C with insulation.
E364xA User’s and Service Guide 23
Current ratings
[1]
40 25 20 13 10 7 5 3.5 2.5 1.7
Table 1- 7 lists the characteristics of the AWG copper wire.
1Getting Started
NOTE
Output Connections
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
Table 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.
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).
24 E364xA User’s and Service Guide
Getting Started 1
Output Connections
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.
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.
E364xA User’s and Service Guide 25
1Getting Started
NOTE
Output Connections
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
Do not use the shield as one of the sensing conductors and the other end
should be left unconnected.
Connect one end of the sensing lead shield to the chassis
ground (
supply’s output voltage to decrease at the load leads.
Observe the polarity when connecting the sensing leads to
the load.
) only. Opening a sensing lead causes the power
Figure 1- 7.
Figure 1-7 Remote voltage sensing connections
26 E364xA User’s and Service Guide
Getting Started 1
NOTE
Output Connections
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.
E364xA User’s and Service Guide 27
1Getting Started
Output Connections
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.
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.
28 E364xA User’s and Service Guide
Multiple loads
Getting Started 1
Output Connections
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.
E364xA User’s and Service Guide 29
1Getting Started
Operating the Power Supply
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
exhaust 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.
30 E364xA User’s and Service Guide
E364xA Dual Output DC Power Supplies
User’s and Service Guide
2 Operation and Features
Overview 32
Constant Voltage Operation 34
Constant Current Operation 36
Track Mode Operation 38
View Menu Operation 40
Configuring the Remote Interface 42
Storing and Recalling Operating States 44
Programming the Overvoltage Protection 46
Disabling the Output 50
System-Related Operations 52
GPIB Interface Reference 56
RS-232 Interface Reference 57
Calibration 61
This chapter describes the operations and features for the
E364xA dual output DC power supplies.
2 Operation and Features
2
Local
Store
Display
Limit
Display
Limit
On/Off
Output
Overview
Overview
The following section describes 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. When in this mode,
the front panel keys can be used. At power- on, the power
supply is automatically set to operate in the front panel
operation mode and the output1 is selected for front
panel operation. Press
panel operation.
• 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
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
parameters.
• 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
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
output is off, the OFF annunciator turns on and the output
is disabled.
for the output2 front
(Local) key if you did not
again or let the
. When the
32 E364xA User’s and Service Guide
Operation and Features 2
Overview
• 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 8 V 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 21 for more information.
• The display provides the present operating status of the
power supply with annunciators and also informs you of
the error codes.
E364xA User’s and Service Guide 33
2 Operation and Features
Power
High
Display
Limit
NOTE
Constant Voltage Operation
Constant Voltage Operation
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.
2 Turn 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).
The low voltage range is selected and the annunciator for
the range presently selected turns on, for example, the 8V
annunciator turns on for the E3646A model. The knob is
selected for voltage control. At power- on, the output1 is
selected and the OUT1 annunciator turns on.
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 display 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.
34 E364xA User’s and Service Guide
Operation and Features 2
1
Current
Vol tag e
1
Current
Vol tag e
Display
Limit
Display
Limit
On/Off
Output
NOTE
Constant Voltage Operation
4 Adjust the knob for the desired current limit.
[1]
Check that the Limit annunciator still f lashes. 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 Adjust the knob for the desired output voltage.
[2]
Check that the Limit annunciator still f lashes. 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.
E364xA User’s and Service Guide 35
2 Operation and Features
Power
High
Display
Limit
Constant Current Operation
Remote interface operation
CURRent {<current>|MIN|MAX} Set the current.
VOLTage {<voltage>|MIN|MAX} Set the voltage.
OUTPut ON Enable the output.
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.
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 E3646A model. The knob is
selected for voltage control. At power- on, the output1 is
selected and the OUT1 annunciator turns on.
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 display 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 selected supply.
36 E364xA User’s and Service Guide
Operation and Features 2
NOTE
1
1
Current
Vol tag e
Display
Limit
Display
Limit
On/Off
Output
Constant Current Operation
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.
4 Adjust 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 Adjust 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.
[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.
E364xA User’s and Service Guide 37
2 Operation and Features
NOTE
Track Mode Operation
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.
Remote interface operation
VOLTage {<voltage>|MIN|MAX} Set the voltage.
CURRent {<current>|MIN|MAX} Set the current.
OUTPut ON Enable the output.
Track Mode Operation
This power supply provides tracking outputs. In the track
mode, two voltages of the output1 and the output2 supplies
track each other within the voltage programming accuracy as
described on
convenience in varying the symmetrical voltages needed by
operational amplifiers and other circuits using two balanced
outputs. The track mode is always in the off state when
power has been turned off or after a remote interface reset.
“Supplemental Characteristics” on page 174 for
38 E364xA User’s and Service Guide
Front panel operation
Track
Track
Track
NOTE
1 Set either the output1 or the output2 supply to the desired
voltage.
2 Enable the track mode.
HOLD_KEY
Hold down until the Tr ac k annunciator turns on. For
example, when the track mode is first enabled with the
output1 selected, the output2 supply will be set to the
same voltage level as the output1 supply. Once enabled,
any change of the voltage level in either the output1 or
the output2 supply will be reflected in other supply. The
current limit is independently set for each of the output1
or the output2 supply and is not affected by the track
mode.
3 Exit the track mode.
The Tr ac k annunciator turns off.
The tracking accuracy is dependent upon the voltage programming
accuracy of each output. Refer to “Electrical Specifications” on page 172
for more information.
Operation and Features 2
Track Mode Operation
Remote interface operation
OUTPut:TRACk[:STATe]
{OFF|ON}
OUTPut:TRACk[:STATe]? Queries the track
E364xA User’s and Service Guide 39
Disable/enable the
track mode.
mode status.
2 Operation and Features
<
Current
Vol tag e
>
Low
High
View
View
View
View
View
View Menu Operation
View Menu Operation
From the View menu, you can read the errors, firmware
revision, and calibration string. In addition, you can change
the front panel display mode to V-V display, I- I display, or
V- I display as desired. With this V-V or I- I display mode
setting, you can see voltages or currents on the output1 and
the output2, simultaneously.
• After the display mode is set to V- V or I- I, you cannot
change the limit values. If you attempt to change the limit
values by turning the knob or pressing one of the
following keys —
front panel display will automatically return to the normal
display to allow you to change the
limit values.
• After the display mode is set to V-V or I- I, all the
annunciators remain unchanged.
• To exit the view menu without any changes, press
until NO CHANGE is displayed, or select EXIT by turning the
knob and press
, , , , or , the
.
Changing the display mode
1 Enter the View menu.
DISPLAY
If ERRORS appears when you enter the view menu, one or
more command syntax or hardware errors have been
detected. Then turn the knob until “DISPLAY” is displayed.
2 Select the display mode you want to display.
V-I DISPLAY
Select one of the following display modes by turning the
knob — V-V D I SPLAY, I-I DISPLAY, or V-I DISPLAY.
3 Save the change and exit the menu.
40 E364xA User’s and Service Guide
Viewing the errors
View
View
>>>
View
View
View
View
1 Press twice to view the errors.
1: ERR -103
The total number of the errors detected will be displayed
shortly before the above message is displayed. The above
number 1 stands for the first error in queue and the -103
is the error code.
2 Scroll through the error numbers and view the text of the
error message by using the knob and key.
Press to increase the scrolling speed of the text on
the display.
3 Clear the errors and exit the menu.
All the errors are cleared when you exit the menu by
pressing
30 seconds.
Refer to Chapter 4, “Error Messages” for more
information.
Operation and Features 2
View Menu Operation
or let the display time- out for about
Viewing the firmware revision
1 Enter the View menu and select FW REVISION.
FW REVISION
2 View the firmware revision of your power supply.
REV X.X-Y.Y-Z.Z
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.
Refer to
information.
E364xA User’s and Service Guide 41
“Firmware revision query” on page 54 for more
2 Operation and Features
View
View
>
I/O
Config
Configuring the Remote Interface
Viewing the calibration string
1 Enter the View menu and select CAL STRING.
CAL STRING
2 Scroll through the text of the message.
FACTORY CAL 26/11/12
NO STRING is displayed if no calibration message is stored.
Press
to increase the scrolling speed. The Cal String
cannot be changed from the front panel. Refer to
“Calibration message” on page 66 for more information.
Configuring the Remote Interface
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
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).
until
42 E364xA User’s and Service Guide
GPIB configuration
I/O
Config
I/O
Config
I/O
Config
NOTE
I/O
Config
I/O
Config
1 Turn on the remote configuration mode.
GPIB / 488
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.
Operation and Features 2
Configuring the Remote Interface
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
E364xA User’s and Service Guide 43
2 Operation and Features
I/O
Config
I/O
Config
Store
Storing and Recalling Operating States
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
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.
44 E364xA User’s and Service Guide
Operation and Features 2
Store
Store
Store
Store
Store
NOTE
Recall
Recall
Storing and Recalling Operating States
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
4 Save the operating state.
DONE
Recalling a stored state
Before proceeding with the steps listed below, ensure that the outputs are
disabled throughout the recall procedure (the CV or CC annunciator turns
off and the OFF annunciator turns on).
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 98 for more
details on the *RST command.
3 Recall the stored operating state.
DONE
E364xA User’s and Service Guide 45
2 Operation and Features
Power
2or1
Programming the Overvoltage Protection
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”.
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
1 Turn on the power supply.
2 Select the output to be programmed.
46 E364xA User’s and Service Guide
Operation and Features 2
Over
Vol tag e
<
>
Over
Vol tag e
Over
Vol tag e
Programming the Overvoltage Protection
3 Enter the OVP menu and set the desired trip level.
LEVEL 22.0 V (E3646A)
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.
4 Enable the OVP circuit.
OVP ON
5 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
OVP1 and OVP2 annunciators turn on if the OVP circuit is
enabled.
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 OVP1 or
OVP2 annunciator to flash depending on the output operated,
and the CC annunciator to turn on. The OVP1 (or OVP2) TRIP
message also appears on the display.
Clearing the overvoltage condition
When the OVP condition occurs, the OVP1 or OVP2
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 OVP1 (or OVP2) TRIP
if you allow the display to time- out after about several
seconds.
E364xA User’s and Service Guide 47
2 Operation and Features
Display
Limit
Display
Limit
Over
Vol tag e
Over
Vol tag e
Over
Vol tag e
Over
Vol tag e
Over
Vol tag e
Over
Vol tag e
Programming the Overvoltage Protection
• By adjusting the output voltage level
i Lower the output voltage level below the OVP trip point.
The OVP1 or OVP2, and Limit annunciators are flashing
after
is pressed.
ii 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.
iii Select the OVP CLEAR mode by turning the knob.
OVP ON
OVP CLEAR
iv Clear the overvoltage condition and exit this menu.
DONE
The annunciator for the OVP operation will not flash
any more. The output will return to the meter mode.
• By adjusting the OVP trip level
i Raise the OVP trip level higher than the level tripped.
ii Select the OVP CLEAR mode by turning the knob.
OVP ON
OVP CLEAR
iii Clear the overvoltage condition and exit this menu.
DONE
The annunciator for the OVP operation will not flash
any more. The output will return to the meter mode.
48 E364xA User’s and Service Guide
Remote interface operation
NOTE
VOLT:PROT {<voltage>|MIN|MAX} Set the OVP level.
VOLT:PROT:STAT {OFF|ON) Disable or enable the
VOLT:PROT:CLE Clear the tripped
The power supply’s OVP circuit contains a crowbar SCR, which effectively
shorts the output of the power supply whenever the overvoltage condition
occurs. If an external voltage source such as a battery is connected across
the output, and the overvoltage condition inadvertently 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.
Operation and Features 2
Programming the Overvoltage Protection
OVP ci rcuit.
OVP ci rcuit.
Figure 2-1 Recommended protection circuit for battery charging
E364xA User’s and Service Guide 49
2 Operation and Features
<
>
Display
Limit
On/Off
Output
Disabling the Output
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
keys until the flashing digit disappears.
• To see or check the changes while the output is disabled,
press
before returning to the meter mode.
or resolution selection
Front panel operation
OUTPUT OFF
Remote interface operation
OUTP {OFF|ON}
50 E364xA User’s and Service Guide
Operation and Features 2
NOTE
Disabling the Output
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 state is OFF. The TTL
output of pin 1 or pin 9 of the RS- 232 connector is available
only after installing two jumpers (JP1 and JP2)
power supply. Refer to “Component Locator Diagram” on
page 225 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
[1] For serial MY53xx6xxx, the two jumpers are JP752 and JP751.
E364xA User’s and Service Guide 51
2 Operation and Features
System-Related Operations
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.
52 E364xA User’s and Service Guide
Operation and Features 2
Store
Recall
System-Related Operations
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.
E364xA User’s and Service Guide 53
2 Operation and Features
Display
Limit
System-Related Operations
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
and Maintenance” for instructions on returning the power
supply to Keysight for service.
Chapter 8, “Service
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
Messages” for more information.
Chapter 4, “Error
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.
54 E364xA User’s and Service Guide
Front panel operation
View
View
View
View
REV X.X-Y.Y-Z.Z
Press and turn the knob until FW REVISION appears
and then press to read the system firmware revision
numbers.
Remote interface operation
*IDN?
The above command returns a string in the form:
Keysight Technologies,E3646A,0,X.X-Y.Y-Z.Z (E3646A)
Be sure to dimension a string variable with at least
40 characters.
SCPI language version
Operation and Features 2
System-Related Operations
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
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).
E364xA User’s and Service Guide 55
2 Operation and Features
NOTE
GPIB Interface Reference
GPIB Interface Reference
The GPIB connector on the rear panel connects your power
supply to the computer and other GPIB devices.
“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.
Chapter 1,
Refer to “Configuring the Remote Interface” on page 42 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.
56 E364xA User’s and Service Guide
RS-232 Interface Reference
I/O
Config
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 in
“Interface Configuration Commands” on page 106.
RS-232 configuration overview
Configure the RS- 232 interface using the parameters as
shown below. Use the front panel
baud rate, parity, and number of data bits (refer to
“Configuring the Remote Interface” on page 42 for more
information).
Operation and Features 2
RS-232 Interface Reference
key to select the
• Baud rate: 300, 600, 1200, 2400, 4800, or
9600 (factory setting)
• Parity and data bits: None/8 data bits (factory setting)
Even/7 data bits, or
Odd/7 data bits
• Number of start bits: 1 bit (fixed)
• Number of stop bits: 2 bits (fixed)
E364xA User’s and Service Guide 57
2 Operation and Features
RS-232 Interface Reference
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.
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.
58 E364xA User’s and Service Guide
Operation and Features 2
Instrument
PC
DB9
Male
DB9
Female
DB9
Female
DB9
Male
DCD
RX
TX
DTR
1
2
3
4
5
6
7
8
9
GND
DSR
RTS
CTS
RI
1
2
3
4
5
6
7
8
9
DCD
RX
TX
DTR
GND
DSR
RTS
CTS
RI
5182-4794
Cable
RS-232 Interface Reference
The cable and adapter diagrams as shown in Figure 2- 2 and
Figure 2- 3 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- 2.
Figure 2-2 DB-9 serial connection
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
E364xA User’s and Service Guide 59
Figure 2- 3.
2 Operation and Features
Instrument
PC
DB9
Male
DB9
Female
DB9
Female
DB9
Male
DCD
RX
TX
DTR
1
2
3
4
5
6
7
8
9
GND
DSR
RTS
CTS
RI
TX
RX
RTS
CTS
DSR
GND
DCD
DTR
5182-4794
Cable
5181-6641
Adapter
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
20
DB25
Female
DB25
Male
RS-232 Interface Reference
Figure 2-3 DB-25 serial connection
RS-232 troubleshooting
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.
• 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.).
60 E364xA User’s and Service Guide
Calibration
NOTE
This section gives an overview of the calibration features of
the power supply. For more detailed discussion of the
calibration procedures, refer to
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 E3646A
has less than nine characters.
Operation and Features 2
Calibration
Chapter 8, “Service and
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.
E364xA User’s and Service Guide 61
2 Operation and Features
Calibrate
View
Power
Calibrate
View
Secure
Config
I/O
Power
Secure
Config
I/O
Calibration
Tab l e 2 - 1 Factory-setting security codes
Model Security code
E3646A 003646
E3647A 003647
E3648A 003648
E3649A 003649
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
for the factory- setting secure code for your power supply.
Front panel operation
Table 2- 1
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.
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.
62 E364xA User’s and Service Guide
Notice that if you enter the wrong security code, INVALID
Calibrate
View
Power
Calibrate
View
Secure
Config
I/O
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
To unsecure the power supply, send the above command
with the same code used to secure. For example:
CAL:SEC:STAT OFF, ‘003646’ (E3646A 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.
Operation and Features 2
Calibration
the power supply.
Be sure to read the security code rules at “Calibration
security” on page 61 before attempting to secure the power
supply.
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
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.
E364xA User’s and Service Guide 63
(Calibrate) key. Hold down the key until
2 Operation and Features
Power
Secure
Config
I/O
Secure
Config
I/O
Secure
Config
I/O
Calibration
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 as used to unsecure. For example,
CAL:SEC:STAT ON, ‘003646’ (E3646A model)
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 61 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 the
key.
Changing the code from the front panel also changes the
code as seen from the remote interface.
64 E364xA User’s and Service Guide
(Secure)
Remote interface operation
CAL:SEC:CODE <new code> Change the security
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, ‘003646’ Unsecure with the
CAL:SEC:CODE ‘ZZ001443’ Enter the new code.
CAL:SEC:STAT ON, ‘ZZ001443’ Secure with the new
Calibration count
Operation and Features 2
Calibration
code.
old code.
code.
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 six counts.
Remote interface operation
CAL:COUN? Query the number of times of calibration
E364xA User’s and Service Guide 65
2 Operation and Features
View
View>View
View
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.
• 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.
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 12-05-99’
66 E364xA User’s and Service Guide
E364xA Dual Output DC Power Supplies
User’s and Service Guide
3 Remote Interface Reference
SCPI Command Summary 68
Introduction to the SCPI Language 74
Simplified Programming Overview 80
Using the APPLy Command 83
Output Settings and Operation Commands 84
Triggering Commands 92
System-Related Commands 95
State Storage Commands 99
Calibration Commands 101
Interface Configuration Commands 106
SCPI Status Registers 107
Status Reporting Commands 119
Halting an Output in Progress 124
SCPI Conformance Information 125
IEEE-488 Conformance Information 128
This chapter lists the SCPI commands.
3 Remote Interface Reference
NOTE
SCPI Command Summary
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 Standard Commands for
Programmable Instruments (SCPI) available to program the
power supply over the remote interface. Refer to the
respective sections in this chapter for more details on each
command.
Throughout this manual, the following conventions are used
for the 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.
68 E364xA User’s and Service Guide
Tab l e 3 - 1 SCPI command summary
Output Settings and Operation 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?
INSTrument[:SELect] {OUTPut1|OUTPut2|OUT1|OUT2}
[:SELect]?
:NSELect {1|2}
:NSELect?
:COUPle
[:TRIGger] {ON|OFF}
[:TRIGger]?
MEASure
[:SCALar]
:CURRent[:DC]?
[:VOLTage][:DC]?
OUTPut
:TRACk[:STATe] {ON|OFF}
:TRACk[:STATe]?
[1]
|P20V
[1]
|P35V
[2]
|P60V
[2]
|LOW|HIGH}
Remote Interface Reference 3
SCPI Command Summary
E364xA User’s and Service Guide 69
3 Remote Interface Reference
SCPI Command Summary
Tab l e 3 - 1 SCPI command summary (continued)
Triggering Commands
INITiate[:IMMediate]
TRIGger[:SEQuence]
:DELay {<seconds>|MIN|MAX}
:DELay? [MIN|MAX]
:SOURce {BUS|IMM}
:SOURce?
*TRG
System-Related Commands
DISPlay[:WINDow]
[:STATe] {OFF|ON}
[:STATe]?
:MODE {VV|VI|II}
:MODE?
:TEXT[:DATA] <quoted string>
:TEXT[:DATA]?
:TEXT:CLEar
SYSTem
:BEEPer[:IMMediate]
:ERRor?
:VERSion?
OUTPut
:RELay[:STATe] {OFF|ON}
:RELay[:STATe]?
[:STATe] {OFF|ON}
[:STATe]?
*IDN?
*RST
*TST?
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}
70 E364xA User’s and Service Guide
Tab l e 3 - 1 SCPI command summary (continued)
Calibration Commands
CALibration
:COUNt?
:CURRent[:DATA] <numeric value>
:CURRent:LEVel {MIN|MID|MAX}
:SECure:CODE <new code>
:SECure:STATe {OFF|ON}, <quoted code>
:SECure:STATe?
:STRing <quoted string>
:STRing?
:VOLTage[:DATA] <numeric value>
:VOLTage:LEVel {MIN|MID|MAX}
:VOLTage:PROTection
Interface Configuration Commands
SYSTem
:INTerface {GPIB|RS232}
:LOCal
:REMote
:RWLock
Remote Interface Reference 3
SCPI Command Summary
E364xA User’s and Service Guide 71
3 Remote Interface Reference
SCPI Command Summary
Tab l e 3 - 1 SCPI command summary (continued)
Status Reporting Commands
STATus:QUEStionable
[:EVENt]?
:ENABle <enable value>
:ENABle?
:INSTrument
[:EVENt]?
:ENABle <enable value>
:ENABle?
:ISUMmary<n>
[:EVENt]?
:CONDition?
:ENABle <enable value>
:ENABle?
SYSTem:ERRor?
*CLS
*ESE <enable value>
*ESE?
*ESR?
*OPC
*OPC?
*PSC {0|1}
*PSC?
*SRE <enable value>
*SRE?
*STB?
*WAI
72 E364xA User’s and Service Guide
Tab l e 3 - 1 SCPI command summary (continued)
IEEE-488 Conformance Information
*CLS
*ESR?
*ESE <enable value>
*ESE?
*IDN?
*OPC
*OPC?
*PSC {0|1}
*PSC?
*RST
*SAV {1|2|3|4|5}
*RCL {1|2|3|4|5}
*STB?
*SRE <enable value>
*SRE?
*TRG
*TST?
*WAI
[1] Applicable for E3646A and E3648A only.
Remote Interface Reference 3
SCPI Command Summary
[2] Applicable for E3647A and E3649A only.
E364xA User’s and Service Guide 73
3 Remote Interface Reference
Introduction to the SCPI Language
Introduction to the SCPI Language
Standard Commands for Programmable Instruments (SCPI)
is an ASCII- based instrument command language designed
for test and measurement instruments. Refer to
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}
“Simplified
SOURce is the root keyword of the command, CURRent and
VOLTage are second- level keywords, and TRIGgered is the
third- level keyword. A colon (:) separates a command
keyword from a lower- level keyword.
74 E364xA User’s and Service Guide
Introduction to the SCPI Language
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- case 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-case
or lower- case letters. Therefore, CURRENT, curr, and Curr
are all acceptable. Other forms, such as CUR and CURREN,
will generate an error.
Braces ({}) enclose the parameter choices for a given
command string. The braces are not sent with the command
string.
Remote Interface Reference 3
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.
E364xA User’s and Service Guide 75
3 Remote Interface Reference
Introduction to the SCPI Language
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
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 parameters using a comma as shown
below:
SOURce:CURRent:TRIGgered
APPLy 3.5,1.5
Table 3- 1.
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
76 E364xA User’s and Service Guide
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