User’s Guide
Keysight Series N5700
System DC Power
Supply
Legal Notices
© Keysight Technologies 2004, 2014
No part of this document may be
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document is provided “as is,” and is
subject to being changed, without
notice, in future editions. Further, to
the maximum extent permitted by
applicable law, Keysight disclaims all
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with regard to this manual and any
information contained herein, including
but not limited to the implied
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fitness for a particular purpose.
Keysight shall not be liable for errors or
for incidental or consequential
damages in connection with the
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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
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Manual Editions
Manual Part Number: 5969-2917
Edition 7, August 2014
Reprints of this manual containing
minor corrections and updates may
have the same printing date. Revised
editions are identified by a new
printing date.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight
products may be downloaded from the
Web. Go to
http://www.keysight.com/go/conformi
ty and click on “Declarations of
Conformity.” You can then search by
product number to find the latest
Declaration of Conformity.
Waste Electrical and
Electronic Equipment (WEEE)
Directive 2002/96/EC
This product complies with the WEEE
Directive 2002/96/EC) marketing
requirement. The affixed product label
(see below) indicates that you must not
discard this electrical/electronic
product in domestic household waste.
Product Category: With reference to
the equipment types in the WEEE
directive Annex 1, this product is
classified as “Monitoring and Control
instrumentation” product.
Do not dispose in domestic household
waste.
To return unwanted products, contact
our local Keysight office, or see
www.keysight.com/environment/produ
ct for more information.
Certification
Keysight Technologies certifies that
this product met its published
specifications at time of shipment from
the factory. Keysight Technologies
further certifies that its calibration
measurements are traceable to the
United States National Institute of
Standards and Technology, to the
extent allowed by the Institute's
calibration facility, and to the
calibration facilities of other
International Standards Organization
members.
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THE REMEDIES PROVIDED HEREIN
ARE THE CUSTOMER'S SOLE AND
EXCLUSIVE REMEDIES. KEYSIGHT
TECHNOLOGIES SHALL NOT BE
LIABLE FOR ANY DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES,
WHETHER BASED ON CONTRACT,
TORT, OR ANY OTHER LEGAL
THEORY.
Assistance
This product comes with the standard
product warranty. Warranty options,
extended support contacts, product
maintenance agreements and
customer assistance agreements are
also available. Contact your nearest
Keysight Technologies Sales and
Service office for further information on
Keysight Technologies' full line of
Support Programs.
Technologies Licenses
The hardware and or software
described in this document are
furnished under a license and may be
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Restricted Rights Legend
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granted to the federal government
include only those rights customarily
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technical data pursuant to FAR 12.211
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(Computer Software) and, for the
Department of Defense, DFARS
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Commercial Items) and DFARS
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Computer Software or Computer
Software Documentation).
Trademarks
Microsoft and Windows are U.S.
registered trademarks of Microsoft
Corporation.
Series N5700 User’s Guide
3
Safety Notices
current
current
Neutral conductor on
permanently installed
equipment
equipment.
switch is off
push switch
push switch
documents
CAUTION
WARNING
The following general safety
precautions must be observed during
all phases of operation of this
instrument. Failure to comply with
these precautions or with specific
warnings or instructions elsewhere in
this manual violates safety standards
of design, manufacture, and intended
use of the instrument. Keysight
Technologies assumes no liability for
the customer's failure to comply with
these requirements.
General
Do not use this product in any
manner not specified by the
manufacturer. The protective features
of this product may be impaired if it is
used in a manner not specified in the
operation instructions.
Before Applying Power
Verify that all safety precautions are
taken. Make all connections to the
unit before applying power. Note the
instrument's external markings
described under "Safety Symbols"
Ground the Instrument
This product is a Safety Class 1
instrument (provided with a protective
earth terminal). To minimize shock
hazard, the instrument chassis and
cover must be connected to an
electrical ground. The instrument
must be connected to the ac power
mains through a grounded power
cable, with the ground wire firmly
connected to an electrical ground
(safety ground) at the power outlet.
Any interruption of the protective
(grounding) conductor or
disconnection of the protective earth
terminal will cause a potential shock
hazard that could result in personal
injury.
Fuses
The instrument contains an internal
fuse, which is not customer
accessible.
Do Not Operate in an Explosive
Atmosphere
Do not operate the instrument in the
presence of flammable gases or
fumes.
Do Not Remove the Instrument
Cover
Only qualified, service-trained
personnel who are aware of the
hazards involved should remove
instrument covers. Always disconnect
the power cable and any external
circuits before removing the
instrument cover.
Do Not Modify the Instrument
Do not install substitute parts or
perform any unauthorized
modification to the product. Return
the product to a Keysight Sales and
Service Office for service and repair to
ensure that safety features are
maintained.
In Case of Damage
Instruments that appear damaged or
defective should be made inoperative
and secured against unintended
operation until they can be repaired
by qualified service personnel
A CAUTION notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly
performed or adhered to, could
result in damage to the product or
loss of important data. Do not
proceed beyond a
notice until the indicated
conditions are fully understood
and met.
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly
performed or adhered to, could
result in personal injury or death.
Do not proceed beyond a
CAUTION
WARNING notice until the
indicated conditions are fully
understood and met.
Safety Symbols
Direct current
Alternating current
Both direct and
alternating
Three phase alternating
Earth (ground) terminal
Protective earth ground
terminal.
Frame or chassis
terminal
Terminal is at earth
potential.
Line conductor on
permanently installed
On supply
Off supply
Standby supply. Unit is not
completely disconnected
from ac mains when
In position of a bi-stable
Out position of a bi-stable
Caution, risk of electric
shock
Caution, hot surface
Caution, refer to
accompanying
4 Series N5700 User’s Guide
In this Book
NOTE
Technologies at one of the following telephone
This User’s Manual contains the operating instructions, installation
instructions, and specifications of the Keysight Technologies Series
N5700 750W and 1500W System DC Power Supplies. Specific chapters
in this manual contain the following information:
Quick Reference – Chapter 1 is a quick reference section that helps
you quickly become familiar with your Keysight N5700 power supply.
Installation – Chapter 2 describes how to install your power supply.
It describes how to connect various loads to the output. It discusses
remote sensing as well as parallel and series operation.
Operating the Power Supply Locally – Chapter 3 describes how to
operate the power supply from the front panel and from the analog
connector on the rear panel. It also includes a turn-on check-out
procedure to verify the unit is operating properly.
Operating the Power Supply Remotely – Chapter 4 describes how to
configure the remote interfaces. It also gives a brief overview of the
SCPI command structure and basic programming concepts.
Language Reference – Chapter 5 describes all of the SCPI
programming commands.
Programming Examples – Chapter 6 provides Visual BASIC example
programs that illustrate some common applications.
Specifications – Appendix A describes specifications and
supplemental characteristics.
Verification and Calibration Procedures – Appendix B explains the
verification and calibration procedures.
Service – Appendix C describes what to do if your unit requires
service.
Compatibility – Appendix D documents the compatibility commands
of the Keysight 603xA power supplies that are supported by the
Keysight N5700 power supplies.
You can contact Keysight
numbers for warranty, service, or technical support information.
In the United States: (800) 829-4444
In Europe: 31 20 547 2111
In Japan: 0120-421-345
Or use our Web link for information on contacting Keysight in your
country or specific location:
Or contact your Keysight Technologies Representative.
The web contains the most up to date version of the manual. Go to
http://www.keysight.com/find/N5700 to get the latest version of the
manual.
www.keysight.com/find/assist
Series N5700 User’s Guide 5
Contents
1 Quick Reference .......................................................................................................... 9
2 Installation ................................................................................................................ 17
The Keysight N5700 DC Power Supplies – At a Glance ............... 10
The Front Panel - At a Glance ....................................................... 12
The Rear Panel – At a Glance ........................................................ 14
General Information ....................................................................... 18
Inspecting the Unit ......................................................................... 19
Installing the Unit ........................................................................... 19
Connecting the Line Cord .............................................................. 21
Connecting the Load ...................................................................... 23
Output Voltage Sensing ................................................................. 26
Load Considerations ....................................................................... 28
Parallel Connections ...................................................................... 30
Series Connections ......................................................................... 32
J1 Connector Connections ............................................................ 34
3 Operating the Power Supply Locally ......................................................................... 35
Turn-On Check-Out ....................................................................... 36
Normal Operation ........................................................................... 38
Protection Functions ...................................................................... 39
Output On/Off Controls .................................................................. 42
Analog Programming of Output Voltage and Current .................. 44
4 Operating the Power Supply Remotely ..................................................................... 49
Connecting to the Interfaces ......................................................... 50
SCPI Commands – an Introduction ............................................... 59
5 Language Reference ................................................................................................. 65
SCPI Command Summary ............................................................. 66
Calibration Commands................................................................... 68
Measure Commands ...................................................................... 69
Output Commands ......................................................................... 70
Source Commands ......................................................................... 71
Status Commands .......................................................................... 73
System Commands ........................................................................ 79
Trigger Commands ......................................................................... 81
6 Series N5700 User’s Guide
6 Programming Examples ............................................................................................ 83
Output Programming Example ...................................................... 84
Trigger Programming Example ...................................................... 86
A Specifications ........................................................................................................... 89
Performance Specifications ........................................................... 90
Supplemental Characteristics ........................................................ 91
Outline Diagram ............................................................................. 93
B Verification and Calibration ...................................................................................... 95
Verification ...................................................................................... 96
Calibration .................................................................................... 115
C Service .................................................................................................................... 117
Types of Service Available ............................................................ 118
Repackaging for Shipment .......................................................... 118
Operating Checklist ...................................................................... 118
Error Messages ............................................................................. 120
D Compatibility .......................................................................................................... 125
Differences – In General ............................................................... 126
Compatibility Command Summary .............................................. 127
Index ................................................................................................................................ 129
Series N5700 User’s Guide 7
1
Quick Reference
The Keysight N5700 DC Power Supplies – At a Glance ............... 10
The Front Panel - At a Glance ....................................................... 12
The Rear Panel – At a Glance ........................................................ 14
This chapter concisely describes the Keysight Technologies Series
N5700 Power Supplies.
This chapter is not meant to describe every operating feature in detail. It
is simply a quick reference guide to quickly become familiar with the
essential components of the power supply. It can also be used as a
memory jogger for experienced users to quickly find a front/rear panel
function.
A quick reference programming command chart is included in the
beginning of chapter 5.
1 Quick Reference
The Keysight N5700 DC Power Supplies – At a Glance
The Keysight Technologies Series N5700 System DC Power Supplies are
general-purpose, 1U (rack unit) high, switching power supplies that are
available with a wide variety of output voltage and current ratings.
These power supplies are power-factor corrected and operate from a
worldwide AC voltage range. Output voltage and current are
continuously displayed and LED indicators show the complete operating
status of the power supply.
The front panel controls allow the user to set the output parameters,
over-voltage, under-voltage, and over-current protection levels, and
preview the settings.
The rear panel includes the necessary connectors to control and monitor
the power supply operation by analog signals or by the built-in remote
communication interfaces.
Output Features
• Constant voltage/constant current with automatic crossover.
System Features
• High-resolution voltage and current front panel controls.
• Accurate voltage and current readback.
• Independent edge-triggered external shut-off, and level-
triggered external enable/disable.
• Parallel master/slave operation with active current sharing.
• Remote sensing to compensate for voltage drop in load leads.
• Analog output programming and monitoring.
• Built-in GBIB/LAN/USB interface.
• A built-in Web server that lets you control the instrumen
di
rectly from an internet browser on your computer.
• Zero-gap stacking - no ventilation holes at the top and bott
surface of the power supply.
• Universal input voltage with active power factor correction.
• Fan speed control for low noise and extended fan life.
t
om
10 Series N5700 User’s Guide
Programmable Functions
Model
Voltage
Range
Current
Range
Model
Voltage
Range
Current
Range
• Output voltage and current setting.
• Output voltage and current measurement.
• Output voltage and current trigger setting.
• Output On/Off control.
• Over-current protection setting.
• Over-voltage protection setting and readback.
• Under-voltage limit setting and readback.
• Start-up mode (either last setting or reset mode)
• Status register setting and readback.
• Bus trigger
• Calibration
Model Ratings
Quick Reference 1
N5741A
N5742A
N5743A
N5744A
N5745A
N5746A
N5747A
N5748A
N5749A
N5750A
N5751A
N5752A
Minimum output voltage is ≤ 0.2% of the rated output voltage.
Minimum output current is ≤ 0.4% of the rated output current.
0 – 6V
0 – 8V
0 – 12.5V 0 – 60A
0 – 20V
0 – 30V
0 – 40V
0 – 60V
0 – 80V
0 – 100V 0 – 7.5A
0 – 150V 0 – 5A
0 – 300V 0 – 2.5A
0 – 600V 0 – 1.3A
0 – 100A
0 – 90A
0 – 38A
0 – 25A
0 – 19A
0 – 12.5A
0 – 9.5A
N5761A
N5762A
N5763A
N5764A
N5765A
N5766A
N5767A
N5768A
N5769A
N5770A
N5771A
N5772A
0 – 6V
0 – 8V
0 – 12.5V 0 – 120A
0 – 20V 0 – 76A
0 – 30V 0 – 50A
0 – 40V 0 – 38A
0 – 60V 0 – 25A
0 – 80V 0 – 19A
0 – 100V 0 – 15A
0 – 150V 0 – 10A
0 – 300V 0 – 5A
0 – 600V 0 – 2.5A
0 – 180A
0 – 165A
Series N5700 User’s Guide 11
1 Quick Reference
VOLTAGE
PROT FINE
LIMIT/
OVP
UVL
OCP/488 LAN OUT ON
DC AMPS
CURRENT
DC VOLTS
POWER
1
14
17
18
19
2
15
16
3
13
10
4
11
5
12
9
6
7
8
CV CC
1 – VOLTAGE knob
2 – CV indicator
3 – DC VOLTS display
4 – DC AMPS display
5 – CC indicator
6 – CURRENT knob
7 – OUT ON button
8 – OUT ON indicator
The Front Panel - At a Glance
Voltage function: Adjusts the output voltage, the over-voltage protection level,
and the under-voltage limit. If over-voltage protection or under-voltage limits
have been set, you cannot program the output voltage outside those limits.
GPIB address: Selects the GPIB address when OCP/488 is pressed and held.
When lit, indicates that the unit is operating in constant voltage mode – with the
output voltage being held constant.
LED display that normally displays the voltage measured at the sense terminals.
When LIMIT is pressed, the display indicates the programmed voltage setting.
When OVP/UVL is pressed, the display indicates either the OVP or UVL setting.
When OCP/488 is pressed and held, the display indicates the GPIB address.
When LAN is pressed and held, the display indicates the IP and Ethernet address.
LED display that normally displays the current measured at the output terminals.
When LIMIT is pressed, the display indicates the programmed current setting.
When LAN is pressed and held, the display indicates the IP and Ethernet address.
When lit, indicates that the unit is operating in constant current mode – with the
output current being held constant.
Adjusts the output current.
Output function: Press OUT ON to turn the output on or off. Press OUT ON to
reset and turn the output on after an OVP or OCP event has occurred.
Start-up function: Selects between Safe-Start and Auto-Restart modes. Press
display cycles between SAF and AU7. Releasing the OUT ON button while one of
the modes is displayed selects that mode.
and hold the OUT ON button to toggle between Safe-Start and Auto-Restart. The
12 Series N5700 User’s Guide
When lit, indicates that the output is enabled or on.
Quick Reference 1
9 – LAN button
10 – LAN indicator
11 – OCP/488 button
12 – OCP indicator
13 – OVP/UVL button
14 – LIMIT button
15 – LIMIT indicator
16 – FINE button
17 – FINE indicator
18 – PROT indicator
19 – POWER switch
View address: Press LAN to view the IP and Ethernet address. The display first
scrolls through the four segments of the IP address, followed by the six segments
of the Ethernet (EA) address. Press any key to turn the address display off.
Reset address: Press and hold the LAN button for three seconds. Pressing the
LAN button again while the message “LAn rES” is displayed resets the LAN
configuration to the factory-shipped settings (see chapter 4 for settings). If the
key is not pressed again, the display returns to normal and the configuration is
not changed.
When lit, indicates that the LAN has been configured and is operating normally.
When blinking, identifies the unit for which the indicator has been set to blink by
the unit’s Web home page.
Enable OCP: Press OCP/488 to turn over-current protection on. Press OCP/488
again to turn over-current protection off.
Reset OCP: When an over-current protection event occurs, press the OUT ON
button to enable the output and re-arm over-current protection.
GPIB address: Press and hold the OCP/488 button for three seconds. This lets
you set the GPIB address with the Voltage knob.
When lit, indicates that over-current protection is enabled or on.
OVP function: Press OVP/UVL once to set the over-voltage protection level with
the Voltage knob (the display shows OUP). You cannot set the over-voltage
protection lower than about 5% above the present output voltage setting.
UVL function: Press OVP/UVL twice to set the under-voltage programming limit
with the Voltage knob (the display shows UUL). You cannot set the under-voltage
protection higher than about 5% below the present output voltage setting.
Limit function: Press LIMIT to display the output voltage and current limit. For five
seconds the display shows the settings and then it returns to show the actual
output voltage and current.
Lock function: Press and hold the LIMIT button to toggle between Locked front
panel and Unlocked front panel. The display will cycle between LFP and UFP.
Releasing the LIMIT button while one of the modes is displayed selects that
If the display indicates rLFP, the front panel has been locked by a remote
mode.
programming command.
When lit, indicates that the LIMIT button is pressed.
Selects Fine or Coarse adjustment control. In Fine mode, the Voltage and Current
knobs operate with high resolution; in Coarse mode, with lower resolution
(approximately six turns).
When lit, indicates that the unit is in Fine adjustment mode.
When blinking, indicates that a fault has occurred.
OVP, OCP, OTP, Enable fail, and AC fail detection will cause the PROT indicator to
The PROT indicator may blink and the display indicate AC for a few seconds
blink.
after the unit is turned off because of residual
energy inside the unit.
Series N5700 User’s Guide 13
Turns the power supply on or off.
1 Quick Reference
9
5
7
3
8
4
6
1
2
750W
1500W6V - 60V
80V - 600V
AC INPUT
ON
OFF
+V -V
NOT ACTIVE
J2
SW1
GPIB
ANALOG PROGRAMMING
+S+LS NC -LC-S
1 2 3 4 5 6 7 8 9
10/100 Ethernet
LINK TX
J1
!
!
1 – AC input connector
2 – DC output connector
3 – USB connector
4 – LAN connector
5 – Analog Programming
connector
6 – SW1 setup switch
7 – Remote Sense
connector
8 – GPIB connector
9 – Ground screw
WARNING
SHOCK HAZARD The power cord provides a chassis ground through a
third conductor. Be certain that your power outlet is of the threeconductor type with the correct pin connected to earth ground
The Rear Panel – At a Glance
Wire clamp connector for 1500W output models.
IEC connector for 750W output models.
Wire clamp connector for 80V to 600V models.
Bus bars for 6V to 60V models.
Connector for connecting to a USB interface. See chapter 4 for setup.
Connector for connecting to a LAN interface. LINK LED indicates link
integrity. TX LED indicates LAN activity. See chapter 4 for LAN setup.
Connector for the analog interface. Includes output voltage and current
limit programming and monitoring signals, Shut-Off control (electrical
signal), Enable/Disable control (dry-contact), power supply ok (Power
Supply OK) signal and operation mode (CV/CC) signal. (See next page
for details)
Nine-position switch for selecting remote programming and monitoring
modes for Output Voltage, Current Limit and other control functions.
(See next page for details)
Connector for making remote sensing connections for regulating the
load voltage and compensating for wiring voltage drop. (See next page
for details)
Connector for connecting to a GPIB interface. See chapter 4 for setup.
M4x8 screws for making chassis ground connections
14 Series N5700 User’s Guide
J2 Sense Connector
1 – Remote sense (+)
2 – Local sense (+)
3 – Not used
4 – Local sense (–)
5 – Remote sense (–)
1 – Output voltage,
voltage programming
2 – Output current,
current programming
3 – Programming range
(voltage/resistance)
4 – Voltage and Current
monitoring range
5 – Shut-Off Logic Select
6 – Not Used
7 – Output voltage,
resistive programming
8 – Output current,
resistive programming
9 – Enable/Disable control
1
2
3
4
5
6
7
8
9
T
he factory-shipped configuration is shown in the figure.
SW1 Setup Switch
Quick Reference 1
The factory-shipped setting is Down for all switches.
Down: The output voltage is programmed by the front panel.
Up: The output voltage is programmed by the external voltage signal.
Down: The output current is programmed by the front panel.
Up: The output current is programmed by the external voltage signal.
Down: The remote programming range is: 0 – 5V / 0 – 5KΩ.
Up: The remote programming range is: 0 – 10V / 0 – 10KΩ.
Down: The remote monitoring range is: 0 – 5V.
Up: The remote monitoring range is: 0 – 10V.
Down: OUT OFF = Low (0 – 0.6V) or short; OUT ON = High (2V – 15V) or
open.
Up: OUT OFF = High (2V – 15V) or open; OUT ON = Low (0 – 0.6V) or
short.
Down: The output voltage is programmed by the front panel.
Up: The output voltage is programmed by the external resistor.
Down: The output current is programmed by the front panel.
Up: The output current is programmed by the external resistor.
Series N5700 User’s Guide 15
Down: The J1 Enable+/Enable– pins are not active.
Up: The J1 Enable+/Enable– pins are active.
1 Quick Reference
Pin 1:
Enable IN
Pin 2, 3:
Chassis Common
Pin 4–7:
Not Used
Pin 8:
Local/Analog
Pin 9:
Voltage Program
Pin 10:
Current Program
Pin 11:
Voltage Monitor
Pin 12:
Common
Pin 13:
CV/CC
Pin 14:
Enable OUT
Pin 15:
Shut Off
Pin 16:
Power Supply OK
Pin 17–20:
Not Used
Pin 21:
Local/Analog State
Pin 22:
Voltage Prog. Return
Pin 23:
Current Prog. Return
Pin 24:
Current Monitor
Pin 25:
Parallel
141516
1718
19
2021
2223
24
25
1
2
3
45
6
7
8
101112
13 9
Current Monitor
Current Prog. Return
Voltage Prog. Return
Local / Analog State
Chassis Common
Enable IN
Voltage Monitor
Common (-S)
CV / CC
Current Program
Voltage Program
Local / Analog
Parallel Enable OUT
Shut Off
Power Supply OK
Chassis Common
J1 Analog Programming Connector
T
he factory-shipped default configuration is Local operation, which does
not require connection to J1.
Connect Pin 1 to Pin 14 to enable the output. Disconnect to disable the
output.
Signal return for Pin 15 and Pin 16. Connected to chassis.
No connection
Input for selecting between front panel or analog programming of the
output.
Input for voltage or resistance programming of the output voltage.
Input for voltage or resistance programming of the output current.
Output for monitoring the output voltage.
Signal return for Pin 8, Pin11, Pin 13, and Pin 24. Connected internally to –S.
Output for constant voltage/constant current mode indication.
Connect Pin 14 to Pin 1 to enable the output. Disconnect to disable the
output.
Input for Shut-Off control of the output. Referenced to Chassis Common.
Output to indicate the power supply status. Referenced to Chassis Common.
No connection
Output for indication of local or analog programming mode.
16 Series N5700 User’s Guide
Signal return for Pin 9. Connected internally to –S.
Signal return for Pin 10. Connected internally to –S.
Output for monitoring the output current.
Output for current balancing in parallel operation.
2
Installation
General Information ....................................................................... 18
Inspecting the Unit ......................................................................... 19
Installing the Unit ........................................................................... 19
Connecting the Line Cord .............................................................. 21
Connecting the Load ...................................................................... 23
Output Voltage Sensing ................................................................. 26
Load Considerations ....................................................................... 28
Parallel Connections ...................................................................... 30
Series Connections ......................................................................... 32
J1 Connector Connections ............................................................ 34
This chapter describes how to install your power supply. It discusses
installation, rack mounting, and line cord connections.
This chapter also discusses how to connect your load to the output
terminals. It discusses what you need to know about wire sizes and how
to compensate for voltage drops in the load leads. It also discusses
various loads configurations and how to connect units in series and
parallel.
Before getting started, check the list under “Items Supplied” and verify
that you have received these items with your instrument. If anything is
missing, please contact your nearest Keysight Sales and Service Office.
2 Installation
750 W Models
1500 W Models
Item Description
Item Description
General Information
Models
Items Supplied
N5741A – N5749A
N5750A – N5752A
N5761A – N5769A
N5770A – N5772A
Accessories
Power Cord
Strain relief assembly
AC input cover
Analog connector
Shield assembly
Hardware
Documentation Set
Certificate of
Calibration
Automation-Ready
CD-ROM
A power cord appropriate for your location
750W units are supplied with terminated power cords
1500W units are supplied with unterminated power
cords
A strain relief assembly for unterminated power cords
(only used for 1500W units)
A cover for the AC input on which the strain relief
assembly is mounted (only used for 1500W units)
A DB25 subminiature connector plug for analog
control connections
A shield for the output terminal connections
Nuts, washers, and bolts for connecting load leads to
output bus bars (only used for 6V to 60V units)
Contains User’s Guide with Product Reference CD-
RO
M
A certificate of calibration referenced to the serial
number
E2094N - contains Keysight IO Libraries Suite
N5740A
Rack-mount slide kit for installing in system II cabinets
18 Series N5700 User’s Guide
Inspecting the Unit
WARNING
Do not operate the instrument in the presence of flammable gasses or
fumes
NOTE
Installing the Unit
Safety Considerations
Installation 2
When you receive your power supply, inspect it for any obvious damage
that may have occurred during shipment. If there is damage, notify the
shipping carrier and nearest Keysight Sales and Service Office
immediately. Refer to Appendix C for more information.
Until you have checked out the power supply, save the shipping carton
and packing materials in case the unit has to be returned.
This power supply is a Safety Class 1 instrument, which means it has a
protective earth terminal. That terminal must be connected to earth
ground through power source equipped with a ground receptacle. Refer
to the Safety Summary page at the beginning of this guide for general
safety information. Before installation or operation, check the power
supply and review this guide for safety warnings and instructions. Safety
warnings for specific procedures are located at appropriate places
throughout this Guide.
Environment
Airflow
The environmental conditions, dimensions of the instrument, as well as
an outline diagram are given in Appendix A. Basically, the instrument
should only be operated indoors in a controlled environment. Do not
operate the power supply in an area where the ambient temperature
exceeds 40° C.
Keysight N5700 power supplies generate magnetic fields, which may
affect the operation of other instruments. If your equipment is
susceptible to magnetic fields, do not position it adjacent to the power
supply.
Fans cool the power supply by drawing air through the front and
exhausting it out the back. The instrument must be installed in a location
that allows sufficient space of at least 10 cm (4 in) at the front and back
of the unit for adequate air circulation.
Series N5700 User’s Guide 19
2 Installation
CAUTION
WARNING
SHOCK HAZARD To prevent electric shock, unplug the unit before
cleaning.
Rack Installation
Ensure that the screws used to attach the rack slide kit do not penetrate
more than 6 mm into the sides of the unit.
Do not block the air intake at the front, or the exhaust at the rear of the
unit.
The Keysight N5700 power supplies can be mounted in a standard 19inch rack panel or cabinet. They are designed to fit in one rack unit (1U)
of space. To install the power supply in a rack:
. U
1
se the front panel rack-mount brackets to install the power supply i
e rack.
th
2. Use a support bracket to provide adequate support for the rear of the
power supply.
3.If using rack mount slides, use Keysight N5740A Rack-mount Slide Kit
to install the unit in a standard 19-inch equipment rack. Refer to the
following figure for assembly instructions. Use two #10-32 x 3/8 in
(max.) screws at each side. To prevent internal damage, use th
s
pecified screw length only.
e
n
Cleaning
Use a dry cloth or one slightly dampened with water to clean the
external case parts. Do not attempt to clean internally.
20 Series N5700 User’s Guide
Connecting the Line Cord
WARNING
SHOCK HAZARD The power cord provides a chassis ground through a
third conductor. Be certain that your power outlet is of the threeconductor type with the correct pin connected to earth ground.
FIRE HAZARD Use only the power cord that was supplied with your
instrument. Using other types of power cords may cause overheating of
the power cord, resulting in fire.
NOTE
The detachable power cord may be used as an emergency disconnecting
CAUTION
device. Removing the power cord will disconnect ac input power to the
unit.
The AC input on the back of your unit is a universal AC input. It accepts
line voltages in the range of 85 VAC to 265 VAC. The frequency range is
47 Hz to 63 Hz.
Installation 2
The input current requirement of 750W units is 10.5A @ 100 VAC
nominal and 5A @ 200 VAC nominal. The current requirement of 1500W
units is 21A @ 100 VAC nominal and 11A @ 200 VAC nominal.
Input Connections for 750W units
Connect the power cord to the IEC 320 connector on the rear of the unit.
The IEC connector provides the safety ground connection when the AC
cord is plugged into a grounded AC receptacle.
If the wrong power cord was shipped with your unit, contact your
nearest Keysight Sales and Service Office.
Input Connections for 1500W units
Connection of this power supply to an AC power source should be made
by a qualified electrician or other qualified personnel.
The AC input connector is a 3-terminal wire clamp located on the rear
panel. Use suitable wires and tightening torque as follows:
• Wire diameter: 12 AWG or 10 AWG
• Tightening torque: 6.5 - 7.0 in-lb
Connect the cable to the AC input connector as follows:
• Strip the outside insulation of the AC cable approximately 10 cm
(4 in). Trim the wires so that the ground wire is 10 mm (0.4 in)
Series N5700 User’s Guide 21
longer than the other wires. Strip 14 mm (0.55 in) at the end of
each of the wires.
2 Installation
L
N
Cover
Assembled
Strain Relief
M3 x 8mm
Pan Head Screws
(2 places)
• Unscrew the base of the strain relief from the wire compression
nut. Place the locknut inside the AC input cover with the flat
side of the nut against the cover. Insert the base through the
outside opening of the AC input cover. Screw the base securely
onto the locknut from the outside (17 in-lbs).
• Slide the wire compression nut over the AC cable. Insert th
tripped wires through the strain relief base until the outer cabl
s
acket is flush with the inside edge of the base. Place a wrench
j
e
on the base to keep it from turning. Now tighten the
compression nut to the base (14-16.2 in-lbs) while holding the
cable in place. Now the cable is securely fastened inside th
train relief. Refer to the following figure.
s
e
• Route the AC wires to the input connector terminals as required.
To connect the wires, loosen the terminal screw, insert th
tripped wire into the terminal, and tighten the screw securely
s
e
to between 4.4–5.3 in-lbs.
• Route the wires inside the cover to prevent pinching. Fasten the
cover to the unit using the M3 x 8mm pan head screws provided
(4.8 in-lbs). Refer to the following figure for details.
e
22 Series N5700 User’s Guide
Connecting the Load
WARNING
SHOCK HAZARD Turn off AC power before making rear panel
connections. All wires and straps must be properly connected with
screws securely tightened.
WARNING
FIRE HAZARD To satisfy safety requirements, select a wire size heavy
enough not to overheat while carrying the power supply load current at
the rated load, or the current that would flow in the event the load wires
were shorted, whichever is greater.
Wire
size
AWG
Resistance
Ω/1000 foot
Maximum length in feet to limit voltage to 1 V
for 5 A for 10 A for 20A for 50A for
150A
14
2.526
80
40
20 8 2
12
1.589
120
60
30
12
3.4
10
0.9994
200
100
50
20
6
80 32
6
0.3953
500
250
125
50
16
4
0.2486
800
400
200
80
26
2
0.1564
1200
600
300
125
40
0
0.0983
2000
1000
500
200
68
Wire Size
Installation 2
As further explained in this section, the following factors should be
considered when selecting wiring to connect the load to the power
supply:
• Current carrying capacity of the wire
• Insulation rating of the wire should be at least equivalent to the
maximum output voltage of the power supply
• Maximum wire length and voltage drop
• Noise and impedance effects of the load wiring
Along with conductor temperature, you must also consider voltage drop
when selecting wire sizes. The following chart lists the resistance for
various wire sizes and also the maximum lengths to limit the voltage
drop to 1.0 volt for various currents.
Although the power supply will compensate for up to 5V in each load
wire, it is recommended to minimize the voltage drop to less than 1V to
prevent excessive output power consumption from the power supply and
poor dynamic response to load changes.
8
0.6285
320
160
10
Series N5700 User’s Guide 23
2 Installation
Cross
section
(mm2)
Resistance
Ω/kilometer
Maximum length in meters to limit voltage to 1 V
for 5 A for 10 A for 20A for 50A for 150A
16
1.24
160
80.0
40.0
16.0
5.4
35
0.565
354
177
88.0
35.4
11.8
WARNING
CAUTION
M8x15 screw (2 places)
Hex Nut (2 places)
Flat washer (2 places)
Spring washer (2 places)
Wire terminal lug (2 places)
Flat washer
(2 places)
Screws tightening torque: 104-118 in-lb.
2.5
4
6
10
25
8.21
5.09
3.39
1.95
0.795
24.0 12.0
39.2 18.6
59.0 29.4
102
250
Load Connections for 6V to 60V Models
SHOCK HAZARD Hazardous voltages may exist at the outputs and the
load connections when using a power supply with a rated output greater
than 60V. To protect personnel against accidental contact with
hazardous voltages, ensure that the load and its connections have no
accessible live parts. Ensure that the load wiring insulation rating is
greater than or equal to the maximum output voltage of the power
supply.
Ensure that the load wiring mounting hardware does not short the
output terminals. Heavy connecting cables must have some form of
strain relief to prevent loosening the connections or bending the busbars.
51.2
125
6.0
9.8
14.8
25.6
62.0
2.4
4.0
5.8
10.2 3.4
25.2 8.4
0.8
1.4
2.0
24 Series N5700 User’s Guide
All load wires should be properly terminated with wire terminals securely
attached. Do not use unterminated wires for load connections at the
power supply. The following figures illustrate how to connect the load
wires to the power supply bus-bars as well as how to mount the bus-bar
shield to the chassis.
Install the shield after you have finished connecting the load wires.
WARNING
Wire Size:
Stripping Length:
Torque:
Shield
Load wires
Negative (-)
Outp
ut/Return
Positive Output (+)
+V
-V
Load Connections for 80V to 600V Models
SHOCK HAZARD Hazardous voltages may exist at the outputs and the
load connections when using a power supply with a rated output greater
than 60V. To protect personnel against accidental contact with hazardous
voltages, ensure that the load and its connections have no accessible live
parts. Ensure that the load wiring insulation rating is greater than or equal
to the maximum output voltage of the power supply.
Installation 2
The 80V to 600V models have a four-terminal wire clamp output
connector. The two left terminals are the positive outputs and the two
right terminals are the negative outputs. The connector specifications
are as follows:
AWG 18 to AWG 10
10 mm (0.39 in.)
6.5 - 7 in-lb.
The following instructions describe how to connect the load wires to the
power supply:
• Strip wires back approximately 10 mm (0.39 in).
• Loosen the connector terminal screws and insert the stripped
wires into the terminal. Tighten the terminal screw securely.
Series N5700 User’s Guide 25
2 Installation
WARNING
A
A
Load
wires
1 Remote sense (+)
2 Local sense (+)
3 Not connected
4 Local sense (-)
5 Remote sense (-)
• Loosen the two chassis screws marked A halfway.
• Assemble the protective shield to the chassis and tighten the
two screws to fix the shield to the chassis. Screw tightening
torque: 4.8-5.3 in-lb
• Tighten the wires to one of the shield sides using tie-wrap or
equivalent. Refer to the following figure.
Output Voltage Sensing
26 Series N5700 User’s Guide
• Ensure that the wire length inside the shield is long enough to
provide proper strain relief.
SHOCK HAZARD There is a potential shock hazard at the sense
connector when using a power supply with a rated output greater than
60V. Ensure that the local sense and remote sense wiring insulation
rating is greater than or equal to the maximum output voltage of the
power supply. Ensure that the connections at the load end are shielded
to prevent accidental contact with hazardous voltages.
Local and remote sense connections are made at the J2 connector. The
connector has a removable plug that makes it easy for you to make your
wire connections. Refer to the following figure for the terminal
assignments.
Plug Type:
MC 1.5/5-ST-3.81, Phoenix
Wire Size:
AWG 28 to AWG 16
Stripping Length:
7 mm (0.28 in.)
Torque:
0.22 – 0.25 Nm (1.95 – 2.21 in-lb.)
Local Sensing
NOTE
-
-
Rem.sense
Local sense
Local sense
Rem.sense
+
Load lines, twisted
pair, shortest length
possible.
+V
-V
Load
+
Power
Supply
+
Error
Amp.
Installation 2
The J2 connector plug specifications are as follows:
The power supply is shipped with the rear panel J2 sense connector
wired for local sensing of the output voltage. With local sensing, the
output voltage regulation is made at the output terminals. This method
does not compensate for voltage drop on the load wires, therefore it is
recommended only for low load current applications or where the load
regulation is less critical. The following figure illustrates the internal
connections of the J2 connector.
If the power supply is operated without the local sense jumpers or
without the remote sense lines connected, it will continue to work, but
the output voltage regulation will be degraded. Also, the OVP circuit
may activate and shut down the power supply.
Remote Sensing
Use remote sensing in applications where load regulation at the load is
critical. Remote sensing allows the power supply to compensate for the
voltage drop in the load leads. See Appendix A under Remote Sense
Compensation for the maximum allowable voltage drop on the load wires.
Remote sensing is especially useful in constant voltage mode with load
impedances that vary or have significant lead resistance. It has no effect
in constant current mode. Because sensing is independent of other
power supply functions it can be used regardless of how the power
supply is programmed. With remote sensing, voltage readback monitors
the load voltage at the remote sense points.
Use twisted or shielded wires to minimize noise pick-up. If shielded wires
are used, the shield should be connected to the ground at one point,
either at the power supply chassis or the load ground. The optimal point
for the shield ground should be determined by experimentation.
To configure the power supply for remote sensing:
• Turn off the power supply.
• Remove the local sense jumpers from the J2 connector.
Series N5700 User’s Guide 27
2 Installation
NOTE
CAUTION
-
-
Rem.sense
Local sense
ocal sense
Rem.sense
+L
+
Load lines, twisted pair,
shortest length possible.
+V
-V
Load#1
+
Load#3
+
Load#2
+
Power
Supply
-
-
Rem.sense
Local sense
ocal sense
Rem.sense
+L
+
Sense lines.
Twisted pair or
+V
-V
Load
+
Power
Supply
Load lines. Twisted pair
shortest length possible.
shielded wires.
• Connect the negative sense lead to terminal 5 (-S) and the
positive sense lead to terminal 1 (+S). Make sure that the
connector plug is securely inserted into the connector body.
• Turn on the power supply.
If the power supply is operated with remote sensing and either the
positive or negative load wire is not connected, an internal protection
circuit will activate and shut down the power supply. To resume
operation, turn the power supply off, connect the open load wire, and
turn on the power supply.
Internal components between +V and +Local sense and between –V and
–Local sense can fail if the voltage drop across the load leads exceeds
the allowable voltage drop on the leads (see Appendix A, Remote Sense
ompensation). This can happen when using excessively long load leads.
C
Load Considerations
Multiple Loads
The following figure shows multiple loads connected to one power
supply. Each load should be connected to the power supply’s output
terminals using separate pairs of wires. It is recommended that each pair
of wires will be as short as possible and twisted or shielded to minimize
noise pick-up and radiation. The sense wires should be connected to the
power supply output terminals or to the load with the most critical load
regulation requirement.
28 Series N5700 User’s Guide
If remotely located distribution terminals are used, as shown in the
-
-
Rem.sense
Local sense
ocal sense
Rem.sense
+L
+
Distribution terminal
+V
+V
-V
-V
Load#1
+
Load#3
+
Load#2
+
Power
Supply
following figure, the power supply output terminals should be connected
to the remote distribution terminals by a pair of twisted and/or shielded
wires. Connect each load to the distribution terminals separately.
Remote voltage sensing is recommended under these circumstances.
Sense either at the remote distribution terminals or, if one load is more
sensitive than the others, directly at the critical load.
Output Noise and Impedance Effects
Installation 2
To minimize the noise pickup or radiation, the load wires and remote
sense wires should be twisted-pairs to the shortest possible length.
Shielding of sense leads may be necessary in high noise environments.
Where shielding is used, connect the shield to the chassis via a rear
panel ground screw. Even if noise is not a concern, the load and remote
sense wires should be twisted-pairs to reduce coupling, which might
impact the stability of power supply. The sense leads should be
separated from the power leads.
Twisting the load wires reduces the parasitic inductance of the cable,
which could produce high frequency voltage spikes at the load and the
output because of current variation in the load itself.
The impedance introduced between the power supply output and the
load could make the ripple and noise at the load worse than the noise at
the power supply rear panel output. Additional filtering with bypass
capacitors at the load terminals may be required to bypass the high
frequency load current.
Inductive Loads
Inductive loads can produce voltage spikes that may be harmful to the
power supply. A diode should be connected across the output. The diode
voltage and current rating should be greater than the power supply
maximum output voltage and current rating. Connect the cathode to the
positive output and the anode to the negative output of the power
supply.
Where positive load transients such as back EMF from a motor may
Series N5700 User’s Guide 29
occur, connect a surge suppressor across the output to protect the
power supply. The breakdown voltage rating of the suppressor must be
approximately 10% higher than the maximum output voltage of the
power supply.
2 Installation
CAUTION
source, the power supply will continuously sink current from the external
WARNING
SHOCK HAZARD
For models up to 60 VDC rated output, no point on the output shall be
more than ±60 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Positive
output shall be more than ±600 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Negative
output shall be more than ±400 VDC above or below chassis ground.
CAUTION
Battery Charging
If a battery or external voltage source is connected across the output
and the output is programmed below the battery or external voltage
source. This could damage the power supply.
To avoid damaging the power supply, insert a reverse blocking diode in
series with the + output connection of the power supply. Connect the
diode’s cathode to the + battery terminal or external voltage source.
Connect the diode’s anode to the + output terminal of the power supply.
Grounding the Output
The output of the power supply is isolated from earth ground. Either
positive or negative voltages can be obtained from the output by
grounding (or "commoning") one of the output terminals. Always use two
wires to connect the load to the output regardless of where or how the
system is grounded.
Parallel Connections
To avoid noise problems caused by common-mode current flowing from
the load to ground, it is recommended to ground the output terminal as
close as possible to the power supply chassis ground
.
Only power supplies that have identical voltage and current ratings can
be connected in parallel.
Up to four units of the same voltage and current rating can be
connected in parallel to provide up to four times the output current
capability. Refer to the following figures for typical connections of
parallel power supplies using either local or remote sensing. The figures
show two units, however, the same connection method applies for up to
four units.
30 Series N5700 User’s Guide
Local Sensing
+
V
-
V
+
V
-
V
+S-S
+S-S
MASTER
POWER SUPPLY
SLAVE
POWER SUPPLY
+S
-S
+S
+S
-S
-S
LOAD
J1-25
J1-10
Parallel
Current Program
As short as possible
Twisted
pair
Twisted
pair
Twisted
pair
J1-8
J1-12
+
V
-
V
+
V
-
V
+S+LS-S -LS
+S+LS-S -LS
MASTER
POWER SUPPLY
SLAVE
POWER SUPPLY
LOAD
J1-25
J1-10
Parallel
Current Program
As short as possible
Twisted
pair
J1-8
J1-12
Installation 2
Remote Sensing
One of the units operates as a master and the remaining units are slaves.
The slave units operate as controlled current sources following the
master output current. In remote operation, only the master unit can be
programmed by the computer while the slave units may be connected to
the computer for voltage, current and status readback only.
It is recommended that each unit supplies only up to 95% of its current
rating because of the imbalance that may be caused by cabling and
Setting up the Master Unit
Series N5700 User’s Guide 31
connections voltage drops.
Connect the sensing circuit for either local or remote sensing as shown
in the previous figures. Set the master unit output voltage to the desired
voltage. Program the current limit to the desired load current limit
divided by the number of parallel units. During operation, the master unit
operates in constant voltage mode, regulating the load voltage at the
programmed output voltage.
2 Installation
WARNING
SHOCK HAZARD
For models up to 60 VDC rated output, no point on the output shall be
more than ±60 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Positive
output shall be more than ±600 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Negative
output shall be more than ±400 VDC above or below chassis ground.
CAUTION
Setting up the Slave Units
Set the rear panel setup switch SW1 position 2 to it’s up position.
Connect J1 pin 10 (Current Program) of the slave unit to J1 pin 25
(Parallel) of the master unit. Also connect a short between J1 pin 8 and
J1 pin 12. The output voltage of the slave units should be programmed
higher than the output voltage of the master unit to prevent interference
with the master unit’s control. The current limit of each unit should be
programmed to the desired load current limit divided by the number of
parallel units.
Setting the Over-Voltage Protection
The master unit OVP should be programmed to the desired OVP level.
The OVP of the slave units should be programmed to a
the master. When the master unit shuts down, it programs the slave unit
to zero output voltage. If a slave unit shuts down when its OVP is set
lower than the master output voltage, only that unit shuts down and the
remaining slave units will supply all the load current.
Setting the Over-Current Protection
higher value than
Over-current protection, if desired, may only be used with the master
unit. When the master unit shuts down, it programs the slave units to
zero output voltage.
Series Connections
Only power supplies that have identical voltage and current ratings can
be connected in series.
Two units of the same voltage and current rating can be connected in
series to provide up to two times the output voltage capability. Because
the current is the same through each element in a series circuit, outputs
connected in series must have equivalent current ratings. Otherwise, the
higher rated output could potentially damage the lower rated output by
forcing excessive current through it under certain load conditions. Refer
to the following figures for typical series connections using either local or
remote sensing.
32 Series N5700 User’s Guide
Installation 2
Local Sensing
Remote Sensing
Local Sensing
Remote Sensing
CAUTION
S) potential.
It is recommended that diodes be connected in parallel with each output
to prevent reverse voltage during start up sequence or in case one unit
shuts down. Each diode should be rated to at least the rated output
voltage and output current of the power supply.
Refer to the following figure for typical connections of series power
supplies configured as a positive and a negative output.
This caution applies when using analog voltage programming with
series-connected power supplies. The analog programming circuits of
these power supplies are referenced to the negative sense (Therefore, the analog voltage circuits used to control each seriesconnected unit must be separated and floated from each other.
Series N5700 User’s Guide 33
2 Installation
WARNING
Mating Plug:
Wire Size:
Extraction tool:
Manual pistol grip
tool:
CAUTION
141516
17
18
19
20
21
22
232425
12
3
45
6
7
8
10
11
12
13
9
Current Monitor
Current Prog. Re turn
Voltage Prog. Return
Local / Analog State
Chassis Common
Enable +
Voltage Monitor
Common (-S)
CV / CC
Current Program
Voltage Program
Local / Analog
Parallel
Enable --
Shut Off
Power Supply OK
Chassis Common
Pins on this side are isolated
from output terminals and are
referenced to chass is ground.
Pins on this side are
referenced to the negative
sense (-S) ter minal.
J1 Connector Connections
SHOCK HAZARD There is a potential shock hazard at the J1 connector
when using a power supply with a rated output greater than 60V. Ensure
that the load wiring insulation rating is greater than or equal to the
maximum output voltage of the power supply.
External programming and monitoring signal are located on the J1
connector. The power supply is shipped with a mating plug that makes it
easy for you to make your wire connections. It is essential to use this
plastic-body plug to conform to safety agency requirements. If a shield is
required for the J1 wires, connect the shield to the ground screw located
on the power supply chassis.
Refer to the following figure for the pin assignments. A description of the
pins is given in chapter 1.
Th
e mating plug specifications for the J1 connector are as follows:
AMP part number 745211-2
AWG 26 to AWG 22
AMP part number 91232-1 or equivalent
Handle: AMP p/n 58074-1
Head: AMP p/n 58063-1
Pins 12, 22 and 23 of J1 are connected internally to the negative sense
(-S) potential of the power supply. Do not attempt to bias any of these
pins relative to the negative output terminal. Use an isolated,
ungrounded, programming source to prevent ground loops and to
maintain the isolation of the power supply when programming from J1.
Chapter 3 describes how to configure the J1 connector when using it to
program the output voltage and current.
34 Series N5700 User’s Guide
3
Operating the Power Supply Locally
Turn-On Check-Out ....................................................................... 36
Normal Operation ........................................................................... 38
Protection Functions ...................................................................... 39
Output On/Off Controls .................................................................. 42
Analog Programming of Output Voltage and Current .................. 44
his chapter contains examples on how to operate your power supply from
T
the front panel. A check-out procedure is included to let you verify that the
power supply is operating properly. Additionally, information about
programming the power supply using the J1 analog programming connector
is also provided.
The simple examples discussed in this chapter show you how to program:
output voltage and current functions
protection functions
output on/off functions
safe-start and auto-restart
analog programming of voltage and current
front panel locking
Refer to chapters 4 and 5 for information on programming your power supply
using SCPI commands.
3 Operating the Power Supply Locally
WARNING
NOTE
CAUTION
Turn-On Check-Out
Before Turn-On
Ensure that the power supply is configured as follows:
SHOCK HAZARD Be aware that hazardous voltages can be present on the
output terminals. Do not set the output voltage above 60 VDC during the
turn-on check-out procedure. Check to make sure that the startup mode
is set to Safe-Start (see page 42).
Windows CE instruments (instruments manufactured starting in 2014)
have a different turn-on characteristic than previous units. Windows CE
units may take up to 30 seconds to initialize when they are turned on.
• The unit is connected to the proper AC mains (see chapter 2).
• The POWER switch is in the off position.
• Sense connector pins 1 and 2 are jumpered; sense connector pins 4
and 5 are jumpered.
• All switches on Connector J2 are in the down position.
Constant Voltage Check
• Turn the POWER switch on.
After the “OFF” is first displayed, you need to allow a few seconds for the
unit to stabilize before you enable the output with the OUT ON button.
The output voltage and current settings may not be at zero during this
stabilization time. Check that the settings are stable by pressing the LIMIT
button and verifying that the voltage and current settings indicate zero.
• Turn the output on by pressing the OUT ON button. The green OUT
ON indicator should be illuminated.
• The green CV indicator should also be illuminated. If the CC
indicator is illuminated, rotate the current knob until the CV
indicator becomes illuminated.
• Rotate the voltage knob while observing the DC VOLTS display. The
output voltage should vary while the knob is turned. The voltage
range is from zero to the maximum rated output for the power
supply model.
OVP Check
• Rotate the voltage knob and set the output voltage of the unit to
50% of its full-scale rating or 30 volts, whichever is lower.
• Press the OVP/UVL button once so that the DC AMPS display
indicates OUP. The DC VOLTS display shows the OVP level.
• Use the voltage knob and set the OVP level of the unit to 75% of its
full-scale voltage rating or 40 volts, whichever is lower.
• Wait a few seconds until the DC VOLTS display returns to show the
output voltage.
36 Series N5700 User’s Guide
UVL Check
Operating the Power Supply Locally 3
• Use the voltage knob and raise the output voltage of the unit until it
approaches the OVP setting. Check to make sure that the output
voltage cannot be set higher than the OVP setting.
• Press the OVP/UVL button again. Rotate the voltage knob and reset
the OVP level of the unit to its maximum setting.
• Press the OVP/UVL button twice so that the DC AMPS display
indicates UUL. The DC VOLTS display shows the UVL level.
• Use the voltage knob and set the UVL level of the unit to 50% of its
full-scale voltage rating or 30 volts, whichever is lower.
• Wait a few seconds until the DC VOLTS display returns to show the
output voltage.
• Use the voltage knob and lower the output voltage of the unit until it
approaches the UVL setting. Check to make sure that the output
voltage cannot be set lower than the UVL setting.
• Press the OVP/UVL button twice. Rotate the voltage knob and reset
the UVL level of the unit to its minimum setting.
Constant Current Check
• Turn the POWER switch off. Wait a few seconds until the AC
indicator on the front panel goes out.
• Use a heavy wire and short the +V and –V output terminals together.
• Turn the POWER switch on.
• Turn the output on by pressing the OUT ON button. The green OUT
ON indicator should be illuminated. The green CC indicator should
be also illuminated.
• Rotate the current knob while observing the DC AMPS display. The
output current should vary while the knob is turned. The current
range is from zero to the maximum rated output for the power
supply model.
OCP Check
• Rotate the current knob and set the current limit of the unit to about
10% of its full-scale current rating.
• Press the OCP/488 button. This should trip the OCP protection. The
OCP indicator should be illuminated, the DC VOLTS display should
indicate OCP, and the Alarm indicator should be blinking.
• Press the OCP/488 button again to cancel OCP protection. The DC
VOLTS display should indicate OFF because the OCP protection is
latched.
• Press the OUT ON button to reset the OCP protection. The outpu
hould return to its previous setting.
s
• Turn the POWER switch off.
• Remove the short from the +V and –V output terminals.
t
Series N5700 User’s Guide 37
3 Operating the Power Supply Locally
NOTE
Normal Operation
The power supply has two basic operating modes: constant voltage and
constant current mode. In constant voltage mode, the power supply
regulates the output voltage at the selected value, while the load current
varies as required by the load. In constant current mode, the power supply
regulates the output current at the selected value, while the voltage varies as
required by the load. The mode in which the power supply operates at any
given time depends on the voltage setting, current limit setting, and the load
resistance.
Constant Voltage Mode
When the power supply is operating in constant voltage mode, the CV
indicator on the front panel illuminates.
Adjustment of the output voltage can be made when the output is enabled
(On) or disabled (Off). When the output is enabled, simply rotate the voltage
knob to program the output voltage.
When the output is disabled, press the LIMIT button and then rotate the
voltage knob. The DC VOLTS display will show the programmed voltage for 5
seconds after the adjustment has been completed and then indicate OFF.
The voltage knob can be set to coarse or fine resolution. Press the FINE
button to select finer resolution. The FINE indicator turns on.
If you cannot adjust the voltage to the value that you desire, the power
supply may be operating at its current limit. Check the load condition
and the current limit setting. Also, the voltage cannot be programmed
lower than about 5% above the UVL setting, or higher than about 5%
below the OVP setting.
Constant Current Mode
When the power supply is operating in constant current mode, the CC
indicator on the front panel illuminates.
Adjustment of the output current limit can be made when the output is
enabled (On) or disabled (Off). When the output is enabled and in constant
current mode, simply rotate the current knob to program the current limit. If
the output is in constant voltage mode, press the LIMIT button and then
rotate the current knob. The DC AMPS display will show the programmed
current for 5 seconds after the adjustment has been completed and then
indicate the actual output current.
When the output is disabled, press the LIMIT button and then rotate the
current knob. The DC AMPS display will show the programmed current for 5
seconds after the adjustment has been completed and then go blank
because the output is off.
The current knob can be set to coarse or fine resolution. Press the FINE
button to select finer resolution. The FINE indicator turns on.
38 Series N5700 User’s Guide
CV/CC Mode Crossover
CAUTION
If the power supply is in constant voltage mode and the load current
increases above the current limit setting, the power supply switches to
constant current mode. If the load decreases below the current limit setting,
the power supply switches to constant voltage mode.
CV/CC Signal
Do not connect the CV/CC signal to a voltage source higher than
30VDC. Always connect the CV/CC signal to the voltage source with a
series resistor to limit the sink current to less than 10mA.
The CV/CC signal available on the J1 connector indicates the operating
mode of the power supply. The CV/CC signal is an open collector output with
a 30V parallel zener at J1 pin 13, referenced to common at J1 pin 12. J1 pin
12 is connected internally to the –S terminal. When the power supply
operates in constant voltage mode, CV/CC output is open. When the power
supply operates in constant current mode, CV/CC signal output is low (0 -
0.6V), with maximum 10mA sink current.
Operating the Power Supply Locally 3
Protection Functions
Over-Voltage Protection
The over-voltage protection protects against over-voltage conditions on the
output. If the output voltage attempts to exceed the programmed limit in
response to an analog programming signal or in the event of a power supply
failure, the over-voltage protection circuit will protect the load by disabling
the output. The voltage is monitored at the sense terminals, thus providing
the protection level directly at the load. Upon detection of an over-voltage
condition, the output is disabled, the display shows OVP, the PROT indicator
blinks, and OV is set in the Questionable Condition status register.
Adjustment of the over-voltage setting can be made when the output is
enabled (On) or disabled (Off). To set the OVP level, press the OVP/UVL
button so that the display indicates OUP. The display will show the OVP
setting. Rotate the voltage knob to adjust the OVP level. The display will
show OVP and the setting value for another five seconds and then return to
its previous state.
The OVP settings are limited at the minimum level to approximately 5%
above the output voltage setting. Attempting to adjust the OVP below this
limit will result in no response to the adjustment attempt. Refer to Appendix
A for the maximum OVP settings.
Use one of the following methods to reset the OVP circuit after it activates. If
the condition that caused the over-voltage shutdown is still present, the OVP
circuit will turn the output off again.
• Press the OUT ON button to turn the output on.
• Turn the AC power off, wait a few seconds, and turn it on.
Series N5700 User’s Guide 39
3 Operating the Power Supply Locally
• Turn the output off, then on again using the Shut Off pin on the J1
• If the OVP continues to trip, try lowering the output voltage below the
Under-Voltage Limit
Under-voltage limit is a protection function that prevents adjustment of the
output voltage below a set limit either from the front panel or remote
interface. It does NOT include protection trip circuitry like the over-voltage
protection. The combination of UVL and OVP lets you create a protection
window for sensitive load circuitry.
Setting the UVL can be made when the output is enabled (On) or disabled
(Off). To set the UVL level, press the OVP/UVL button twice, so that the
display shows UUL. The display will show the UVL setting. Rotate the voltage
knob to adjust the UVL level. The display will show UUL and the setting value
for another five seconds and then return to its previous state.
The UVL settings are limited at the maximum level to approximately 5%
below the output voltage setting. Attempting to adjust the UVL above this
limit will result in no response to the adjustment attempt. The minimum UVL
setting is zero.
connector. This only applies in Auto-Restart mode.
OVP setting, or raising the OVP setting.
Over-Current Protection
Over-current protection will shut down the power supply output if the load
current reaches the current limit setting. This protection is useful when the
load is sensitive to an over-current condition.
To arm the over-current protection, press the OCP/488 button so that the
OCP indicator illuminates. When armed, a transition from constant voltage to
constant current mode will activate the over-current protection. When an
over-current protection event occurs, the output is disabled, the display
shows OCP, the PROT indicator blinks, and OC is set in the Questionable
Condition status register.
Use one of the following methods to reset over-current protection after it
activates. If the load current is still higher than the current limit setting, the
over-current protection will be activated again.
• Press the OUT ON button to turn the output on.
• Turn the AC power off, wait a few seconds, and turn it on.
• Turn the output off, then on again using the Shut Off pin on the J1
connector. This only applies in Auto-Restart mode.
• Press the OCP/488 button to cancel over-current protection. The display
will show OFF because OCP protection is latched. Press the OUT ON
button to reset OCP. With this method, the over-current protection is
disabled. If the load current is still higher than the current limit setting,
the power supply will only attempt to limit the current at the curren
imit setting.
l
t
40 Series N5700 User’s Guide
Over-Temperature Protection
NOTE
The over-temperature protection circuit shuts down the power supply before
the internal components can exceed their safe internal operating
temperature. This can occur if there is a cooling fan failure. When an OTP
condition occurs, the output is disabled, the display shows O7P, the PROT
indicator blinks, and the OT status bit is set in the Questionable Condition
status register. Resetting the OTP circuit can be automatic (non-latched) or
manual (latched) depending on the Safe-Start or Auto-Restart mode.
In Safe-Start mode, the OTP circuit is latched. The display continues to show
O7P and the PROT indicator continues to blink. To reset the OTP circuit,
press the OUT ON button.
In Auto-Restart mode, the OTP circuit is non-latched. The power supply
returns to its last setting automatically when the over-temperature condition
is removed.
Power-Fail Protection
If the AC power stops briefly, but returns before the power supply has reset,
the power-fail protection circuit trips and the PF status bit is set in the
Questionable Condition status register. Resetting the power-fail protection
can be automatic (non-latched) or manual (latched), depending on the SafeStart or Auto-Restart mode.
Operating the Power Supply Locally 3
In Safe-Start mode, the output of the power supply is Off, as specified by the
reset state when AC power returns. In Auto-Restart mode, the power supply
recovers its last settings when AC power returns.
Front Panel Lock-Out
The front panel controls can be locked to protect from accidental power
supply parameter change. Press and hold the LIMIT button to toggle
between Locked front panel and Unlocked front panel. The display will cycle
between LFP and UFP. Releasing the LIMIT button while one of the modes is
displayed, selects that mode.
In Unlocked front panel mode, the front panel controls are enabled to
program and monitor the power supply parameters.
In Locked front panel mode, the VOLTAGE and CURRENT knobs, the
OCP/488 button, and the OUT ON button are disabled
The power supply will not respond to attempts to use these controls. The
display will show LFP to indicate that the front panel is locked. The OVP/UVL
button remains active to preview the OVP and UVL setting. The LIMIT button
also remains active to preview the output voltage and current setting or to
unlock the front panel.
This function operates independently of the SCPI SYST:COMM:RLST
command. If the front panel has been locked from the front panel, it
cannot be unlocked by SYST:COMM:RLST. Conversely, if the front panel
has been locked by SYST:COMM:RLST, it cannot be unlocked from the
front panel.
Series N5700 User’s Guide 41
3 Operating the Power Supply Locally
CAUTION
stabilization time. Check that the settings are stable by pressing the LIMIT
Output On/Off state
UVL level
Output voltage setting
OCP setting
Output current setting
Locked/Unlocked front panel
OVP level
Start-up mode
Output On/Off Controls
The Output On/Off controls turn the power supply output on or off. This can
be done with the front panel OUT ON button or from the rear panel J1
connector. With the output off, adjustments can be made to the power
supply or the load without shutting off AC power.
OUT ON button
The OUT ON button can be pressed at any time to enable or disable the
power supply output. When the output is disabled, the output voltage and
current go to zero and the display shows OFF.
Safe-Start and Auto-Restart
The power supply can be programmed to have either the last operating
settings (Auto-Restart) or the reset settings (Safe-Start) apply at turn-on.
Press and hold the OUT ON button to select between Safe-Start and AutoRestart modes. The display continuously cycles between SAF and AUT every
three seconds. Releasing the OUT ON button while one of the modes is
displayed, selects that mode.
In Safe-Start mode, the power supply turns on with the reset settings (see
chapter 5 under “*RST”). The output is disabled and the output voltage and
current are zero. This is the factory default.
After the “OFF” is first displayed, you need to allow a few seconds for the
unit to stabilize before you enable the output with the OUT ON button.
The output voltage and current settings may not be at zero during this
button and verifying that the voltage and current settings indicate zero.
In Auto-Restart mode, the power supply restores the operating settings that
were saved when it was last turned off (see below). The output is either
enabled or disabled according to its last setting.
Output Shut-Off Terminals
Output Shut-Off (SO) terminals are available on the J1 connector to enable
or disable the power supply output.
15 is the Shut-Off input, and pins 2 and 3, which are connected internally,
are the signal common. All pins are optically isolated from the power supply
output. The Shut-Off input accepts a 2.5V-to-15V signal or an open/short
contact to enable or disable the output. The Shut-Off control logic is
selected by SW1 setup switch 5.
This function is edge-triggered. J1 pin
When an on-to-off transition is detected at the Shut-Off input, the Shut-Off
42 Series N5700 User’s Guide
Operating the Power Supply Locally 3
SW1 switch 5
SO Signal Level
Output
Display
NOTE
triggered, it may not be triggered by every
CAUTION
SW1 switch 9
ENA+/ENA– pins
Output
Display
Prot Indicator
function enables or disables the output according to the signal level or the
open/short applied to J1 pin 15. When the output has been disabled by the
Shut-Off function, the display shows SO to indicate the output is disabled.
To re-enable the output after it has shut down, you must disable the ShutOff signal. In Auto-Restart mode, operation resumes automatically. In SafeStart mode the Shut-Off function is latched. You must also press the OUT
ON button or send an OUTPut:PROTection:CLEar command to resume
operation.
The Shut-Off function can be used to shut down multiple power supplies in a
daisy-chain fashion as explained later in this chapter. It can also be used to
reset the OVP and OCP as previously described.
Down (default)
Up
Because this function is edgestate change. For example, after applying AC power, the output will not
be disabled by the Shut Off function if the Shut-Off input is in the shutoff state. This is because the unit has not detected an on-to-off signal
transition.
Enable/Disable Terminals
To prevent possible damage to the unit, do not connect the Enable + or
Enable – terminals to the positive or negative output terminals.
Enable/Disable terminals are available on the J1 connector to enable or
disable the power supply output.
connect a switch or relay between J1 pins 1 and 14. This function is
activated by SW1 setup switch 9.
These pins disable the output when they are opened. When the output is
disabled, the PROT indicator on the front panel will blink.
2 - 15 V or Open On
0 – 0.4V or Short Off
2 - 15 V or Open Off
0 – 0.4V or Short On
This function is level-triggered. Simply
Voltage/Current
SO
SO
Voltage/Current
Series N5700 User’s Guide 43
To re-enable the output after it has shut down, you must short the Enable +
and Enable – terminals. In Auto-Restart mode, operation resumes
automatically. In Safe-Start mode the Enable/Disable function is latched.
You must also press the OUT ON button or send an
OUTPut:PROTection:CLEar command to resume operation.
Down (default)
Up
Not active
Opened
Shorted
On
Off
On
Voltage/Current Off
ENA
Voltage/Current Off
Blinking
3 Operating the Power Supply Locally
Over-current protection
Shut Off signal true
Over-temperature protection
Remote interface failure
AC line failure
Output turned off
CAUTION
sense terminal. Do not reference these pins to any terminal other than the
POWER SUPPLY
#
1
J1-2,3 J1-16 J1-16J1-16J1-15
Supply OK
POWER SUPPLY
#
2
J1-2,3 J1-15
POWER SUPPLY
#3
J1-2,3 J1-15
Shut OffCom
Shut OffSupply OKCom Com
Supply OK Shut Off
Power Supply OK Signal
The Power Supply OK signal on the J1 connector indicates a fault condition
in the power supply. J1 pin 16 is a TTL output signal. Pins 2 and 3, which are
connected internally, are the signal common. All pins are optically isolated
from the power supply output. With no fault, Power Supply OK is high, with a
maximum source current of 2mA. When a fault occurs, Power Supply OK is
low, with a maximum sink current of 1mA. The following faults set this signal
low:
Over-voltage protection
Daisy-Chained Output Shut-down
It is possible to configure a multiple power supply system to shut down all
the units when a fault condition occurs in one of the units. SW1 setup switch
5 must be in the Down position to enable the daisy-chain operation. Other
switches are unaffected by this setting.
If a fault occurs in one unit, its Power Supply OK signal is set low and its
display will indicate the fault. The other units shut off with their displays
indicating SO. When the fault condition is cleared, all units will recover
according to their Safe-Start or Auto-Restart settings.
The following figure shows three units daisy-chained - the same connection
method can be used with additional units. The Shut Off and Power Supply
OK signals are referenced to Chassis Common (J1 pins 2 and 3).
Enable/Disable signal true
Analog Programming of Output Voltage and Current
J1 pin 12, pin 22, and pin 23 are internally connected to the negative
negative sense terminal, as it may damage the unit.
In Local mode, the output voltage and current is programmed with the front
panel VOLTAGE and CURRENT knobs or over the remote interface. In Analog
mode, the output voltage and current can be programmed either by an
44 Series N5700 User’s Guide
analog voltage or by resistors connected to the rear panel J1 connector.
Operating the Power Supply Locally 3
NOTE
SW1 switch 1 and 2
J1 pin 8
function
J1 pin 21
signal
Output voltage/
current control
CAUTION
use an isolated programming source when operating the unit using analog
The J1 connector also provides monitoring signals for the output voltage and
output current. The programming range and monitoring signal range can be
selected using the SW1 setup switch.
With analog programming enabled, you cannot program the output
voltage or current using the front panel knobs or the remote interface.
However, you can read back output voltage or current from the front
panel or the remote interface.
Analog Programming Control Terminals
J1 connector pin 8 accepts a TTL signal or an open/short contact switch
(referenced to pin 12) to select between Local or Analog programming of the
output voltage and current. This function is enabled or disabled by SW1
setup switches 1 and 2.
J1 connector pin 21 is an open collector output that indicates if the power
supply is in Local mode or in Analog mode. To use this output, connect a
pull-up resistor to a voltage source of 30 VDC maximum. Choose the pull-up
resistor so that the sink current will be less than 5mA when the output is in
low state.
Both Down (default)
Either one, or both Up 0 or Short 0~0.6V
No effect
1 or Open Open
Open
Local
Analog
Local
Voltage Programming of Output Voltage and Current
To maintain the isolation of the power supply and prevent ground loops,
programming.
Voltage programming sources of 0 - 5 V or 0 - 10 V can be used to program
the output voltage and current limit from zero to full scale.
Set the power supply to analog voltage programming as follows:
• Make sure that the power supply is turned off.
• Set SW1 setup switch 1 (for voltage) and 2 (for current) to the Up
position.
• Set SW1 setup switch 3 to select programming voltage range
according to the following table.
• Make sure that SW1 setup switches 7 and 8 are set Down.
• Connect a short between J1 pin 8 and J1 pin 12 (see figure).
• Connect the programming source to the mating plug of J1 as shown i
he following figure. Observe the correct polarity for the voltage source.
t
n
Series N5700 User’s Guide 45
3 Operating the Power Supply Locally
SW1 switch 3
Voltage Programming
(J1 pin 9)
Current Programming
(J1 pin 10)
1
14
13
25
10
12
8
9
23
22
+
+
CURRENT LIMIT
PROGRAMMING
OUTPUT VOLTAGE
PROGRAMMING
• Set the programming sources to the desired levels and turn the power
The analog control circuits let you set the output voltage and current limit up
to 5% over the model-rated maximum value. The power supply will operate
within the extended range, however it is not recommended to operate the
power supply over its voltage and current rating, and performance in this
region is not guaranteed.
supply on. Adjust the programming sources to change the power
supply output.
Down (default)
Up
0 – 5 V
0 – 10 V
0 – 5 V
0 – 10 V
Resistance Programming of Output Voltage and Current
Resistances of 0 - 5 kΩ or 0 - 10 kΩ can be selected to program the output
voltage and current limit from zero to full scale. Internal current sources
supply a 1mA current through the external resistors. The voltage drop across
the resistors is used as the programming voltage for the power supply. To
maintain the temperature stability specification of the power supply, only use
resistors that are stable and low noise, with a temperature coefficient less
than 50ppm.
46 Series N5700 User’s Guide
Set the power supply to resistance programming as follows:
• Make sure that the power supply is turned off.
• Set SW1 setup switch 1 (for voltage) and 2 (for current) to the UP
position.
• Set SW1 setup switch 3 to select programming resistance range
according to the following table.
• Set SW1 setup switch 7 (for voltage) and 8 (for current) to the Up
position to enable resistance programming.
• Connect a short between J1 pin 8 and J1 pin 12 (see figure).
• Connect the programming resistors to the mating plug of J1 as
shown in the following figure. A variable resistor can control the
output over its entire range, or a combination of variable resistor and
series/parallel resistors can control the output over a restricted
portion of its range.
Operating the Power Supply Locally 3
SW1 switch 3
Voltage Programming
(J1 pin 9)
Current programming
(J1 pin 10)
Ω
Ω
SW1 switch 4
Voltage
range
J1 signal
connection
Signal function
1
14
13
2
5
10 9
23
22
CURRENT LIMIT
PROGRAMMING
OUTPUT VOLTAGE
PROGRAMMING
PROGRAMMING
RESISTOR
PROGRAMMING
RESISTOR
OPTIONAL SETS
LOWER LIMIT
OPTIONAL SETS
LOWER LIMIT
OPTIONAL SETS
UPPER LIMIT
OPTIONAL SETS
UPPER LIMIT
12
8
• Set the programming resistors to the desired resistance and turn the
power supply on. Adjust the resistors to change the power supply
output.
The analog control circuits let you set the output voltage and current limit up
to 5% over the model-rated maximum value. The power supply will operate
within the extended range, however it is not recommended to operate the
power supply over its voltage and current rating, and performance in this
region is not guaranteed.
Down (default)
Up
0 – 5 k
0 – 10 k
0 – 5 kΩ
0 – 10 kΩ
Series N5700 User’s Guide 47
External Monitoring of Output Voltage and Current
The J1 connector also provides analog signals for monitoring the output
voltage and current. Selection of the voltage range between 0 – 5 V or 0 –
10 V is made by SW1 setup switch 4. The monitoring signals represent 0 to
100% of the power supply output voltage and current rating. The monitor
outputs have a 500 Ω series output resistance. Make sure that the sensing
circuit has an input resistance greater than 500 kΩ or the accuracy will be
reduced.
Down (default)
0 – 5 V
J1 pin 11
J1 pin 24
Up
0 – 10 V J1 pin 11
J1 pin 24
J1 pin 12 is the signal common for J1 pins 11 and 24.
Voltage
Monitor
Current
Monitor
Voltage
Monitor
Current
Monitor
NOTE
4
Operating the Power Supply
Remotely
Connecting to the Interfaces ......................................................... 50
SCPI Commands – an Introduction ............................................... 59
This chapter contains information on how to configure the three remote
interfaces that are provided on the back of the instrument. In most cases
you can connect your power supply to any one of these interfaces and
be up and running with a minimum amount of configuration.
Detailed information on configuring the remote interfaces is included in
the USB/LAN/GPIB Interfaces Connectivity Guide document located on
the Automation-Ready CD-ROM included with this product.
This chapter also contains a brief introduction to the SCPI Programming
language. SCPI (Standard Commands for Programmable Instruments) is
a programming language for controlling instrument functions over the
GPIB. SCPI is layered on top of the hardware-portion of IEEE 488.2. The
same SCPI commands and parameters control the same functions in
different classes of instruments.
4 Operating the Power Supply Remotely
NOTE
Connecting to the Interfaces
The Keysight N5700 power supplies support remote interface
communication using a choice of three interfaces: GPIB, USB, and LAN.
All three interfaces are live at power-on.
GPIB Interface
For detailed information about GPIB interface connections, refer to the
Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide,
located on the Automation-Ready CD-ROM that is shipped with your
product.
The following steps will help you quickly get started connecting your
instrument to the General Purpose Interface Bus (GPIB). The following
figure illustrates a typical GPIB interface system.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with your
product.
2 If you do not have a GPIB interface card installed on your computer,
turn off your computer and install the GPIB card.
3 Connect your instrument to the GPIB interface card using a GPIB
interface cable.
4 Use the Connection Expert utility of the Keysight IO Libraries Suite
to configure the installed GPIB interface card’s parameters.
5 The power supply is shipped with its GPIB address set to 5. Use the
front panel menu if you need to change the GPIB address.
a Press and hold the OCP/488 button for about three seconds.
The DC VOLTS display will show the present GPIB address.
b To change the GPIB address, turn the voltage knob until the
desired GPIB address appears in the display. Valid GPIB
addresses are in the range of 0 to 30.
6 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments.
50 Series N5700 User’s Guide
USB Interface
NOTE
NOTE
NOTE
Operating the Power Supply Remotely 4
For detailed information about USB interface connections, refer to the
Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide,
located on the Automation-Ready CD-ROM that is shipped with your
product.
The following steps will help you quickly get started connecting your
USB-enabled instrument to the Universal Serial Bus (USB). The following
figure illustrates a typical USB interface system.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with your
product.
LAN Interface
2 Connect your instrument to the USB port on your computer.
3 With the Connection Expert utility of the Keysight IO Libraries Suite
running, the computer will automatically recognize the instrument.
This may take several seconds. When the instrument is recognized,
your computer will display the VISA alias, IDN string, and VISA
address. This information is located in the USB folder.
The VISA address is: USB0::2391::2055::serialnumber::0:INSTR
where 2391 is the Keysight code, 2055 is the N5700 code, and serial
number is the 10-character serial number located on the label on the
side of the unit.
4 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments.
For detailed information about LAN interface connections, refer to the
Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide,
located on the Automation-Ready CD-ROM that is shipped with your
product.
The following steps will help you quickly get started connecting and
configuring your instrument on a local area network (LAN). The two
types of local area networks connections that are discussed in this
section are site networks and private networks.
Series N5700 User’s Guide 51
4 Operating the Power Supply Remotely
NOTE
NOTE
Connecting to a Site LAN
A site LAN is a local area network in which LAN-enabled instruments and
computers are connected to the network through routers, hubs, and/or
switches. They are typically large, centrally-managed networks with
services such as DHCP and DNS servers.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with your
product.
2 Connect the instrument to the site LAN. Provided that your network
has a DHCP server and uses Dynamic DNS naming service, the
instrument will automatically obtain an IP address from the network.
This may take up to one minute. It will also register its hostname
with the dynamic DNS server. The default hostname can then be
used to communicate with the instrument.
The front panel
been configured. If you are unable to communicate with the
instrument, check that a valid IP address has been assigned. Press
the front panel LAN button to view the IP address.
LAN indicator will come on when the LAN port has
Each Keysight N5700 power supply is shipped with a default hostname
with the format: A-modelnumber-serialnumber where modelnumber is
the instrument’s 6-character model number (e.g. N5741A), and
serialnumber is 5th through the 9th character of the 10-character serial
number located on the label on the side of the unit (e.g. H1234 if the
serial number is US24H12345). A-N5741A-H1234 is an example of a
hostname.
3 Use the Connection Expert utility of the Keysight IO Libraries Suite
to add the N5700 power supply and verify a connection. To add the
instrument, you can request the Connection Expert to discover the
instrument. If the instrument cannot be found, you can add the
instrument using the instrument’s hostname.
If this does not work, refer to the chapter on “Troubleshooting
Guidelines” in the Keysight Technologies USB/LAN/GPIB Interfaces
Connectivity Guide.
4 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments. You can
also use the Web browser on your computer to communicate with
the instrument as described under “Using the Web Server” later in
this chapter.
52 Series N5700 User’s Guide
Operating the Power Supply Remotely 4
NOTE
that NetBIOS over TCP/IP is enabled. If the computer had been connected to
t
NOTE
Connecting to a Private LAN:
A private LAN is a network in which LAN-enabled instruments and
computers are directly connected, and not connected to a site LAN.
They are typically small, with no centrally-managed resources.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with your
product.
2 Connect the instrument to the computer using a LAN crossover
cable. Alternatively, connect the computer and the instrument to a
standalone hub or switch using regular LAN cables.
Make sure your computer is configured to obtain its address from DHCP and
a site LAN, it may still retain previous network settings from the site LAN.
Wait one minute after disconnecting it from the site LAN before connecting i
to the private LAN. This allows Windows to sense that it is on a different
network and restart the network configuration. If you are running Windows
98, you may need to manually release the previous settings.
3 The factory-shipped instrument LAN settings are configured to
automatically obtain an IP address from the network using a DHCP
server, or using AutoIP if a DHCP server is not present. You can
leave these settings as they are. Most Keysight products and most
computers will automatically choose an IP address using auto-IP if a
DHCP server is not present. Each assigns itself an IP address from
the block 169.254.nnn. Note that this may take up to one minute.
The front panel
been configured. If you are unable to communicate with the
instrument, check that a valid IP address has been assigned. Press
the front panel LAN button to view the IP address.
4 Use the Connection Expert utility of the Keysight IO Libraries Suite
to add the N5700 power supply and verify a connection. To add the
instrument, you can request the Connection Expert to discover the
instrument. If the instrument cannot be found, you can add the
instrument using the instrument’s hostname. The default hostname
is described under “Connecting to a Site LAN”.
LAN indicator will come on when the LAN port has
If this does not work, refer to the chapter on “Troubleshooting Guidelines” in
the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide.
Series N5700 User’s Guide 53
4 Operating the Power Supply Remotely
NOTE
5 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments. You can
also use the Web browser on your computer to communicate with
the instrument as described under “Using the Web Server”.
LAN Communication
The Keysight IO Libraries Suite along with instrument drivers for specific
programming environments can be used to communicate with your
power supply. Your can also communicate with your power supply using
its built-in Web server, the Telnet utility, or sockets. These latter
methods are a convenient way to communicate with the power supply
without using I/O libraries or drivers.
Ethernet Connection Monitoring
Keysight N5700 power supplies that have the LXI label on the front panel
provide Ethernet connection monitoring. With Ethernet connection
monitoring, the instrument’s LAN port is continually monitored, and
automatically reconfigured when the instrument is unplugged for a
minimum of 20 seconds and then reconnected to a network. The front
panel
configured.
LAN indicator will come on when the LAN port is connected and
Using the Web Server
Your power supply has a built-in Web server that lets you control it
directly from an internet browser on your computer. With the Web
server, you can control and configure all of the front panel functions as
well as additional functions such as triggering and the LAN parameters,
which are not available from the front panel.
The built-in Web server only operates over the LAN interface. It requires
Internet Explorer 7+. You also need the Java Plug-in version 7+. This is
included in the Java Runtime Environment.
The Web server is enabled when shipped. To launch the Web server:
1 Open the internet browser on your computer.
2 In the Tools menu, under Internet Options, select Connections, then
LAN Settings, and make sure that the Bypass proxy server for local
addresses box is checked.
3 Enter the instrument’s hostname into the browser’s Address field to
launch the Web server. The following home page will appear.
4 Click on the Browser Web Control button in the navigation bar on
the left to begin controlling your instrument.
5 For additional help about any of the pages, click on the Help with
this Page button.
If desired, you can control access to the Web server using password
protection. As shipped from the factory, no password is set. To set a
password, refer to the section “Configuring the LAN Parameters”.
54 Series N5700 User’s Guide
Operating the Power Supply Remotely 4
Using Telnet
In an MS-DOS Command Prompt box type: telnet hostname 5024 where
hostname is the N5700 hostname or IP address, and 5024 is the
instrument’s telnet port.
You should get a Telnet session box with a title indicating that you are
connected to the power supply. Type the SCPI commands at the prompt.
Using Sockets
Keysight instruments have standardized on using port 5025 for SCPI
socket services. A
receive ASCII/SCPI commands, queries, and query responses. All
commands must be terminated with a newline for the message to be
parsed. All query responses will also be terminated with a newline. The
power supply allows any combination of up to three simultaneous data
socket and telnet connections to be made.
The socket programming interface also allows a control socket
connection. The control socket can be used by a client to send device
clear and to receive service requests. Unlike the data socket, which uses
a fixed port number, the port number for a control socket varies and
must be obtained by sending the following SCPI query to the data
socket: SYSTem:COMMunicate:TCPip:CONTrol?
After the control port number is obtained, a control socket connection
can be opened. As with the data socket, all commands to the control
socket must be terminated with a newline. All query responses will also
be terminated with a newline.
To send a device clear, send the string “DCL” to the control socket.
When the power supply has finished performing the device clear it
echoes the string “DCL” back to the control socket.
data socket on this port can be used to send and
Service requests are enabled for control sockets using the Service
Request Enable register. Once service requests have been enabled, the
client program listens on the control connection. When SRQ goes true
Series N5700 User’s Guide 55
4 Operating the Power Supply Remotely
IP Address
Configuration
IP Address
(auto-IP). Do not assign a manual (static) IP address within this range.
the instrument will send the string “SRQ +nn” to the client. The “nn” is
the status byte value, which the client can use to determine the source
of the service request.
Configuring the LAN Parameters
To configure the LAN parameters from the instrument’s Web server,
launch the Web server as previously described, and click on the View &
Modify Configuration tab on the left side of the page. Then click on the
Modify Configuration button on the top of the page. The following screen
lets you modify the LAN parameters:
The configurable LAN parameters are described as follows:
This setting indicates how the instrument will determine its IP Address,
Subnet Mask, and Default Gateway.
If Automatic is selected, the instrument tries to obtain an IP address
from a DHCP server. If a DHCP server is found, the DHCP server
assigns an IP address, Subnet Mask and Default Gateway to the
instrument. If no DHCP server is found, the instrument automatically
configures its IP address and Subnet Mask using Dynamically
Configured Link Local Addressing (Auto-IP), which results in an
address in the range 169.254.xxx.yyy.
If Manual is selected, the instrument uses the IP Address, Subnet
Mask, and Default Gateway defined below..
This value is the instrument’s Internet Protocol (IP) address. An IP
Address is four decimal numbers from 0 to 255 separated by periods. It
is required for all IP and TCP/IP communications with the instrument.
Note that the Internet Engineering Task Force reserved the IP address
range of 169.254.1.0 to 169.254.254.255 for link-local addressing
56 Series N5700 User’s Guide
Operating the Power Supply Remotely 4
Subnet Mask
Default
Gateway
DNS Server
Address
Configuration
Preferred
DNS Server
Alternate
DNS Server
Desired
Hostname
Description
39 characters.
mDNS
Enabled
affected bvy the Desired Hostname and Description fields.
Password
characters.
NOTE
Windows CE instruments (instruments
This value enables the instrument to determine whether a client IP
address is on the same local subnet. When a client IP address is on a
different subnet, all packets must be sent to the Default Gateway. A
value of 0.0.0.0 or 255.255.255.255 disables subnetting.
This value is the IP Address of the default gateway that allows the
instrument to communicate with systems that are not on the local
subnet. This is the default subnet gateway, where packets are sent that
are destined for a device not on the local subnet, as determined by the
subnet mask setting. A value of 0.0.0.0 disables subnetting.
This setting indicates how the instrument will determine its DNS server,
either manually or automatically from a DHCP server.
If Automatic is selected, the instrument tries to obtain a DNS server
address form a DHCOP server.
If Manual is selected, the instrument uses the DNS servers defined
below.
This is the address of the Domain Name System (DNS) server. DNS is
an internet service that translates domain names into IP addresses. The
instrument uses this server to determine and display its hostname.
This is the address of the alternate Domain Name System (DNS) server.
If Dynamic DNS is available on your network and your instrument uses
DHCP, the Hostname is registered with the Dynamic DNS service at
power-on. If the field is blank, the factory default hostname is restored.
A hostname must start with a letter and may contain upper and lower
case letters, numbers and dashes(-). The Maximum length is 15
characters. The default format is A-<modelnumber>-<digits 5 through 9
of serialnumber>.
This field contains the desired mDNS service name for the instrument,
which makes it easy to identify the device on the network. This
description is also shown on the instrument’s Welcome page. If the field
is blank, the factory default description is restored. Maximum length is
This enables or disables mDNS service announcements. mDNS is
If a password has been set, you will be prompted for it before going to
the Modify Configuration and Browser Web Control pages. The
password may contain letters, numbers, or underscores (_). Once set,
the password may be disabled by entering the old password, and
leaving the new password fields empty. The password is also cleared by
a LAN Reset from the instrument's front panel. Maximum length is 12
The configuration parameters on premanufactured before mid-2014) are slightly different than those described
above. For a description of these previous parameters, access the Modify
Series N5700 User’s Guide 57
Configuration dialog; then click on the Help with this Page button.
4 Operating the Power Supply Remotely
Factory-shipped non-volatile LAN settings
IP Address
169.254.57.0
Desired Hostname
A-N57xxA-xxxxx
Factory-shipped LAN Settings
The factory-shipped LAN settings documented in the following table are
optimized for connecting your power supply to a site network. They
should also work well for other network configurations.
The factory-shipped settings can be restored by pressing and holding
the front panel LAN button for three seconds. Pressing the LAN button
again while the message “LAn rES” is displayed resets the LAN settings.
Get IP Address
Subnet Mask
Default Gateway 0.0.0.0 mDNS Enabled Enabled
DNS Server Address Configuration Automatic
Preferred DNS server
Automatic
255.255.0.0 Description
Blank
Alternate DNS server Blank
Password
Keysight N57xxA (serial#)
Blank
58 Series N5700 User’s Guide
SCPI Commands – an Introduction
[SOURce:]
CURRent
[:LEVel]
[:IMMediate] <NRf+>
:TRIGgered <NRf+>
:PROTection
:STATe <Bool>
Square Brackets [ ]
[SOURce:]VOLTage means that SOURce: may be omitted.
Angle brackets < >
Vertical bar |
indicates that either "VOLT" or "CURR" can be used as a parameter.
SCPI (Standard Commands for Programmable Instruments) is an ASCIIbased instrument command language designed for test and
measurement instruments. 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. Subsystem commands perform specific power
supply functions. A portion of the SOURce subsystem is shown below to
illustrate the tree system.
SOURce is the root keyword of the command, CURRent is a second-level
keyword, LEVel and PROTection are third-level keywords, and
IMMediate, TRIGgered and STATe are fourth-level keywords. Colons (:)
separate higher-level from lower-level keywords.
Operating the Power Supply Remotely 4
Syntax
The following command syntax is used in this manual:
Items within square brackets are optional. The representation
Items within angle brackets are parameter descriptions. For example,
<NR1> indicates a specific form of numerical data.
Vertical bars separate alternative parameters. For example, VOLT | CURR
The syntax characters cannot be included in the command string.
Multiple Commands in a Message
Multiple SCPI commands can be combined and sent as a single message
with one message terminator. There are two important considerations
when sending several commands within a single message:
Use a semicolon (;) to separate commands within a message.
There is an implied path that affects how commands are interpreted
by the power supply.
The command path can be thought of as a string that gets inserted
before each keyword within a message. For the first command in a
message, the path is a null string. For each subsequent command the
path is defined as the characters that make up the keywords of the
previous command in the message up to and including the last colon
separator. An example of a message with two commands is:
Series N5700 User’s Guide 59
4 Operating the Power Supply Remotely
OUTPut:STATe ON;PROTection:CLEar
which shows the use of the semicolon separating the two commands,
and also illustrates the command path concept. Note that with the
second command, the leading keyword OUTPut was omitted because
after the OUTPut:STATe ON command, the path became defined as
OUTPut, and thus the second command was interpreted as:
OUTPut:PROTection:CLEar
In fact, it would have been incorrect to include the OUTPut keyword in
the second command, because the result after combining it with the
command path would be:
OUTPut:OUTPut:PROTection:CLEar
which would result in a syntax error.
Commands from Different Subsystems
In order to combine commands from different subsystems, you need to
be able to reset the command path to a null string within a message.
Beginning the command with a colon (:), discards the previous path. For
example, you could clear the output protection and check the status of
the Operation Condition register in one message by using a root specifier
as follows:
Message Unit
OUTPut:PROTection:CLEar;:STATus:OPERation:CONDition?
The following message shows how to combine commands from different
subsystems as well as within the same subsystem.
VOLTage:LEVel 7.5;PROTection 10;:CURRent:LEVel 0.25
Note the use of the optional keyword LEVel to maintain the correct path
within the subsystems, and the use of the root specifier (:) to move
between subsystems.
The simplest SCPI command is a single message unit consisting of a
keyword followed by a message terminator such as newline. The
message unit may include a parameter after the keyword. The parameter
can be numeric or a string.
ABORt<NL>
VOLTage 20<NL>
VOLTage:TRIGgered MINimum<NL>
Colons (:) separate higher-level keywords from lower-level keywords.
Use a blank space to separate parameters from keywords. If a command
requires more than one parameter, use commas to separate adjacent
parameters.
In the previous examples, the upper-case letters indicate the
abbreviated spelling for the keyword. For shorter program lines, you can
send the abbreviated form. For better program readability, you can send
60 Series N5700 User’s Guide
the long form. For example, VOLT and VOLTage are both acceptable
forms. You can use upper- or lower-case letters. Therefore, VOLTAGE,
Volt, and volt are all acceptable. Other forms, such as VOL and VOLTAG,
generate an error.
Queries
You can query the current value of most commands by adding a
question mark to the command (VOLTage?, VOLTage:TRIGgered?). If a
query contains a parameter, place the query indicator at the end of the
last keyword. Observe the following precautions with queries:
Add a blank space between the query indicator (?) and any
subsequent parameter. (VOLTage:TRIGgered? MAX)
Set up the proper number of variables for the returned data.
Read back all the results of a query before sending another
command to the power supply. Otherwise a Query Interrupted error
will occur and the unreturned data will be lost.
Common Commands
Operating the Power Supply Remotely 4
Common commands generally control overall power supply functions,
such as reset, status, and synchronization. All common commands
consist of a three-letter mnemonic preceded by an asterisk: *RST
*IDN? *SRE 8
You can combine common commands with subsystem commands in the
same message. Use semicolons to separate the common command from
the subsystem commands. Common commands do not affect the
command path; you may insert them anywhere in the message.
VOLTage:TRIGgered 10;:INITiate;*TRG
OUTPut OFF;*RCL 2;OUTPut ON
Command Terminators
A terminator informs SCPI that it has reached the end of a command.
Three permitted command terminators are:
newline (<NL>), which is ASCII decimal 10 or hex 0A.
end or identify (<END>)
both of the above (<NL><END>).
In the examples of this guide, the message terminator is assumed.
Series N5700 User’s Guide 61
4 Operating the Power Supply Remotely
Symbol
Response Formats
Parameter Formats
Class
Suffix
Unit
Unit with Multiplier
S
Common Multipliers
K
M
U
Symbol
Response Formats
Parameter Types
Data programmed or queried from the power supply is ASCII. The data
may be numerical or character string.
Numeric Parameters
<NR1>
<NR2>
<NR3>
<NRf>
<NRf+>
<Bool>
<SPD>
Digits with an implied decimal point assumed at the right
of the least-significant digit. Examples: 273
Digits with an explicit decimal point. Example: 27.3
Digits with an explicit decimal point and an exponent.
Example: 2.73E+02
Extended format that includes <NR1>, <NR2> and
<NR3>. Examples: 273 27.3 2.73E+02
Expanded decimal format that includes <NRf> and MIN,
MAX. Examples: 273 27.3 2.73E+02 MAX.
MIN and MAX are the minimum and maximum limit
values that are implicit in the range specification for the
parameter.
Boolean Data. Can be numeric (0, 1), or named (OFF,
ON).
String program data. String parameters enclosed in
single or double quotes.
Suffixes and Multipliers
Current
Amplitude V
Time
A
ampere
volt
second
MA (milliampere)
MV (millivolt)
MS (millisecond)
62 Series N5700 User’s Guide
1E3
1E-3
1E-6
Response Data Types
<CRD>
<AARD>
<SRD>
Character Response Data. Returns discrete parameters.
Only the short form of the parameter is returned.
Arbitrary ASCII Response Data. Permits the return of
undelimited 7-bit ASCII. This data type has an implied
message terminator.
String Response Data. Returns string parameters
enclosed in double quotes.
kilo
milli
micro
SCPI Command Completion
OUTPut:STATe
INITiate
VOLTage
OUTPut:PROTection:CLEar
CURRent
*WAI
OUTPut ON;*WAI;:MEASure:VOLTage?
*OPC?
. Because it requires your program to read the
proceeding with its program.
*OPC
basis, *OPC allows subsequent commands to be executed.
NOTE
SCPI commands sent to the power supply are processed either
sequentially or in parallel. Sequential commands finish execution before
a subsequent command begins. Parallel commands allow other
commands to begin executing while the parallel command is still
executing.
The following is a list of parallel commands. You should use some form
of command synchronization as discussed in this section before
assuming that these commands have completed.
The *WAI, *OPC, and *OPC? common commands provide different ways
of indicating when all transmitted commands, including any parallel
ones, have completed their operations. Some practical considerations
for using these commands are as follows:
This command prevents the power supply from processing subsequent
commands until all pending operations are completed. For example, the
*WAI command can be used to make a voltage measurement after an
output on command has completed:
Operating the Power Supply Remotely 4
This command places a 1 in the Output Queue when all pending
operations have completed
returned value before executing the next program statement, *OPC? can
be used to cause the controller to wait for commands to complete before
This command sets the OPC status bit when all pending operations have
completed. Since your program can read this status bit on an interrupt
The trigger subsystem must be in the Idle state for the status OPC bit to
be true. As far as triggers are concerned, OPC is false whenever the
trigger subsystem is in the Initiated state.
Device Clear
You can send a Device Clear at any time to abort a SCPI command that
may be hanging up the GPIB interface. Device Clear clears the input and
output buffers of the power supply. The status registers, error queue,
and all configuration states are left unchanged by Device Clear. Device
Clear also prepares the power supply to accept a new command string.
The following statement shows how to send a device clear over the GPIB
interface using Keysight BASIC:
CLEAR 705 IEEE-488 Device Clear
Series N5700 User’s Guide 63
5
Language Reference
SCPI Command Summary ............................................................. 66
Calibration Commands................................................................... 68
Measure Commands ...................................................................... 69
Output Commands ......................................................................... 70
Source Commands ......................................................................... 71
Status Commands .......................................................................... 73
System Commands ........................................................................ 79
Trigger Commands ......................................................................... 81
This section gives the syntax and parameters for all the IEEE 488.2 SCPI
Subsystem commands and Common commands used by the power
supply. It is assumed that you are familiar with the material in chapter 4,
which explains the terms, symbols, and syntactical structures used here
and gives an introduction to programming. You should also be familiar
with chapter 3, in order to understand how the power supply functions.
Subsystem commands are specific to functions. They can be a single
command or a group of commands. The groups are comprised of
commands that extend one or more levels below the root. The
subsystem commands are arranged alphabetically according to the
function they perform.
Common commands begin with an * and consist of three letters
(command) or three letters and a ? (query). They are defined by the IEEE
488.2 standard to perform common interface functions. Common
commands are grouped along with the subsystem commands according
to the function they perform.
5 Language Reference
NOTE
SCPI Command
Description
ABORt
Aborts the triggered action
CALibrate
:CURRent[:LEVel]
Calibrates the output current programming
:DATA <NRf>
Enters the calibration value
:DATE <”SPD”>
Sets the calibration date
:LEVel P1 | P2
Advances to the next calibration step
:PASSword <NRf>
Sets the numeric calibration password
:STATE <Bool> [,<NRf>]
Enables/disables calibration mode
:VOLTage[:LEVel]
Calibrates the output voltage programming
INITiate
[:IMMediate][:TRANsient]
Initiates the trigger system
:CONTinuous[:TRANsient]
Enables/disables continuous triggers
MEASure
[:SCALar]
:CURRent[:DC]?
Returns the measured output current
:VOLTage[:DC]?
Returns the measured output voltage
OUTPut
[:STATe] <Bool>
Enables/disables the specified output
:PON
:STATe RST | AUTO
Programs the Power-On State
:PROTection
:CLEar
Resets latched protection
[SOURce:]
CURRent
[:LEVel]
[:IMMediate][:AMPLitude] <NRf+>
Sets the output current
:TRIGgered[:AMPLitude] <NRf+>
Sets the triggered output current
:PROTection
:STATe <Bool>
Enables/disables over-current protection
VOLTage
[:LEVel]
[:IMMediate][:AMPLitude] <NRf+>
Sets the output voltage
:TRIGgered[:AMPLitude] <NRf+>
Sets the triggered output voltage
:LIMit
:PROTection
[:LEVel] <NRf+>
Sets the over-voltage protection level
SCPI Command Summary
Some [optional] commands have been included for clarity. All settings
commands have a corresponding query.
Subsystem Commands
:LOW <NRf+>
66 Series N5700 User’s Guide
Sets the low-voltage limit
Language Reference 5
SCPI Command
Description
STATus
:OPERation
[:EVENt]?
Returns the value of the operation event register
:CONDition?
Returns the value of the operation condition register
:ENABle <NRf>
Enables specific bits in the Event register
:NTRansition<NRf>
Sets the Negative transition filter
:PTRansition<NRf>
Sets the Positive transition filter
:QUEStionable
[:EVENt]?
Returns the value of the questionable event register
:CONDition?
Returns the value of the questionable condition register
:ENABle <NRf>
Enables specific bits in the Event register
:NTRansition<NRf>
Sets the Negative transition filter
:PTRansition<NRf>
Sets the Positive transition filter
SYSTem
:COMMunicate
:RLSTate LOCal | REMote | RWLock
Specifies the Remote/Local state of the instrument
:ERRor?
Returns the error number and error string
:VERSion?
Returns the SCPI version number
TRIGger
:SOURce BUS
Sets the measurement trigger source
[:TRANsient][:IMMediate]
Generates a transient trigger
Command
Description
*CLS
Clear status
*ESE <NRf>
Standard event status enable
*ESE?
Return standard event status enable
*ESR?
Return event status register
*IDN?
Return instrument identification
*OPC
Enable "operation complete" bit in ESR
*OPC?
Return a "1" when operation complete
*OPT?
Return option number
*RCL <NRf>
Recalls a saved instrument state
*RST
Reset
*SAV <NRf>
Saves an instrument state
*SRE <NRf>
Set service request enable register
*STB?
Return status byte
*TRG
Trigger
*TST
Always returns a “0”
*WAI
Holds off bus until all device commands done
:PRESet
Presets all enable and transition registers to power-on
Common Commands
Series N5700 User’s Guide 67
*SRE?
Return service request enable register
5 Language Reference
NOTE
Calibration Commands
CALibrate:CURRent[:LEVel]
CALibrate:DATA <value>
Calibration commands let you enable and disable the calibration mode,
change the calibration password, calibrate current and voltage
programming, and store new calibration constants in nonvolatile
memory.
If calibration mode has not been enabled with CALibrate:STATe, the
calibration commands will generate an error.
This command initiates the calibration of the output current.
This command enters a calibration value that you obtain by reading an
external meter. You must first select a calibration level (with
CALibrate:LEVel) for the value being entered. Data values are entered in
either volts or amperes, depending on which function is being calibrated.
CALibrate:DATE <“date”>
CALibrate:DATE?
This command stores the date the unit was last calibrated. The data
must be of the numeric format “yyyy/mm/dd” where yyyy indicates the
year, mm indicates the month, and dd indicates the day. The query
returns the date.
CALibrate:LEVel P1|P2
This command selects the next point in the calibration sequence.
P1 is the first calibration point,
P2 is the second calibration point.
CALibrate:PASSword <password>
This command lets you change the calibration password. A new
password is automatically stored in nonvolatile memory. If the password
is set to 0, password protection is removed and the ability to enter
calibration mode is unrestricted. The default password is 0 (zero).
68 Series N5700 User’s Guide
CALibrate:STATe ON|OFF [,<password>]
CALibrate:STATe?
This command enables/disables calibration mode. Calibration mode
must be enabled for the power supply to accept any other calibration
commands. The first parameter specifies the enabled or disabled state
On (1) or Off (0). The second parameter is the password.
A password is required if calibration mode is being enabled and the
existing password is not 0. If the password is not entered or is incorrect,
an error is generated and the calibration mode remains disabled. The
query returns only the state, not the password.
The *RST value = Off.
CALibrate:VOLTage[:LEVel]
This command initiates the calibration of the output voltage.
Language Reference 5
Measure Commands
MEASure[:SCALar]:CURRent[:DC]?
MEASure[:SCALar]:VOLTage[:DC]?
Measure commands measure the output voltage or current. MEASure
commands acquire new data before returning the reading. Measurement
overflows return a reading of 9.91E+37.
These queries perform a measurement and return the DC output current
in amperes or DC output voltage in volts.
Series N5700 User’s Guide 69
5 Language Reference
Output Commands
OUTPut[:STATe] ON|OFF
OUTPut[:STATe]?
OUTPut:PON:STATe RST|AUTO
OUTPut:PON:STATe?
Output commands enable the output, power-on, and protection
functions.
This command enables or disables the specified output(s). The enabled
state is On (1); the disabled state is Off (0). The state of a disabled output
is a condition of zero output voltage and a zero source current (see
*RST). The query returns 0 if the output is off, and 1 if the output is on.
The *RST value = Off.
This command determines if the power-on state will be determined by
the reset state, or the settings the unit had when it was turned off. RST
programs the unit to the reset state; AUTO programs the unit to the
settings it had when it was turned off. The power-on state information is
saved on non-volatile memory.
Refer to *RST and *RCL under System Commands for details.
OUTPut:PROTection:CLEar
This command clears the latched signals that have disabled the output.
The over-voltage and over-current conditions are always latching. The
over-temperature condition, AC-fail condition, Enable pins, and SO pins
are latching if OUTPut:PON:STATe is RST, and non-latching if
OUTPut:PON:STATe is AUTO.
All conditions that generate the fault must be removed before the latch
can be cleared. The output is then restored to the state it was in before
the fault condition occurred.
70 Series N5700 User’s Guide
Language Reference 5
Model (V rating)
6V
8V
12.5V
20V
30V
40V
60V
80V
100V
150V
300V
600V
0 0 0 0 0 0 0 0 0 0
Source Commands
Source commands program the voltage, current, triggered, and
protection functions.
[SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude] <value>|MIN|MAX
[SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude]? [MIN|MAX]
[SOURce:]CURRent[:LEVel]:TRIGgered[:AMPLitude] <value>|MIN|MAX
[SOURce:]CURRent[:LEVel]:TRIGgered[:AMPLitude]? [MIN|MAX]
These commands set the immediate and the triggered output current
level. The values are programmed in amperes. The immediate level is the
output current setting. The triggered level is a stored value that is
transferred to the output when a trigger occurs. At *RST, the immediate
and triggered current values = 0.
[SOURce:]CURRent:PROTection:STATe ON|OFF
[SOURce:]CURRent:PROTection:STATe?
This command enables or disables the over-current protection (OCP)
function. The enabled state is On (1); the disabled state is Off (0). If the
over-current protection function is enabled and the output goes into
constant current operation, the output is disabled and OC is set in the
Questionable Condition status register. The *RST value = Off.
An over-current condition can be cleared with the Output Protection
Clear command after the cause of the condition is removed.
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <value>|MIN|MAX
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude]? [MIN|MAX]
[SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPLitude] <value>|MIN|MAX
[SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPLitude]? [MIN|MAX]
These commands set the immediate and the triggered output voltage
level. The values are programmed in volts. The immediate level is the
output voltage setting. The triggered level is a stored value that is
transferred to the output when a trigger occurs. At *RST, the immediate
and triggered voltage values = 0.
The range of values that can be programmed for these commands is
coupled with the voltage protection and the voltage limit low settings.
The maximum value for the immediate and triggered voltage level is
either the value in the following table, or the voltage protection setting
divided by 1.05; whichever is lower. The minimum value is either the
value in the table, or the low voltage setting divided by 0.95; whichever
is higher.
Note that triggered values can be programmed outside these limits, but
an error will be generated when the trigger occurs.
Min. voltage level
Max. voltage level
Series N5700 User’s Guide 71
0
6.3 8.4 13.12 21
31.5 41.9 62.85 83.8 104.7 157.1 314.2 628.5
0
5 Language Reference
5
6
Model (V rating)
6V
8V
12.5V
20V
30V
40V
60V
80V
100V
150V
300V
600V
0 0 0 0 0 0 0 0 0 0
19
38 57 76 95
Model (V rating)
6V
8V
12.5V
20V
30V
40V
60V
80V
100V
150V
300V
600V
10 15 24 36 44 66 88
[SOURce:]VOLTage:LIMit:LOW <value>|MIN|MAX
[SOURce:]VOLTage:LIMit:LOW? [MIN|MAX]
This command sets the low voltage limit of the output. When a low
voltage limit has been set, the instrument will ignore any programming
commands that attempt to set the output voltage below the low voltage
limit. The*RST value = Min.
The range of values that can be programmed for this command is
coupled with the immediate voltage level setting. The maximum value
for the low voltage limit is either the value in the following table, or the
immediate voltage setting multiplied by 0.95; whichever is lower. The
minimum setting is the value in the table.
Min. low limit 0
Max. low limit
[SOURce:]VOLTage:PROTection:LEVel <value>|MIN|MAX
[SOURce:]VOLTage:PROTection:LEVel? [MIN|MAX]
Min. protection
limit
Max. protection
limit
5.7 7.6 11.9
This command sets the over-voltage protection (OVP) level of the
output. The values are programmed in volts. If the output voltage
exceeds the OVP level, the output is disabled and OV is set in the
Questionable Condition status register. The*RST value = Max.
The range of values that can be programmed for this command is
coupled with the immediate voltage level setting. The minimum value for
the voltage protection level is either the value in the following table, or
the immediate voltage setting multiplied by 1.05; whichever is higher.
The maximum setting is the value in the table.
An over-voltage condition can be cleared with the Output Protection
Clear command after the condition that caused the OVP trip is removed.
0.5 0.5
7.5
1.0
1.0
28.5
2.0
2.0
5.0
5.0
5.0
110
142
5.0
165
285
5.0
330
0
570
5.0
660
72 Series N5700 User’s Guide
LOGICAL
OR
LOGICAL
OR
PON
CME
EXE
DDE
QYE
OPC
0
2
3
4
5
7
1
4
8
16
32
128
1
4
8
16
32
128
EVENT ENABLE
STANDARD EVENT
STATUS
STATUS BYTE
SERVICE
REQUEST
ENABLE
LOGICAL
OR
SERVICE
REQUEST
GENERATION
8
16
32
128
8
16
32
128
RQS
OPER
MSS
ESB
MAV
QUES
4
5
6
7
UNR
OT
OV
0
4
QUESTIONABLE STATUS
10
CONDITION
LOGICAL
OR
EVENT ENABLE
PTR/NTR
1
16
1024
1
16
1024
1
16
1024
1
16
1024
3
CONDITION
5
8
PTR/NTR EVENT
ENABLE
CV
CC
32
256
OC
1
WTG
OPERATION STATUS
PF
2
4 4
2
4
4
2
2 2
INH
9
512
512
512
512
64
10
1024
256
1024
256
1024
256
1024
OUTPUT BUFFER
QUEUE
NOT
EMPTY
Data
Data
Data
*STB?
*SRE<n>
*SRE?
*ESR?
STAT:QUES:COND?
*ESE<n>
*ESE?
STAT:QUES:PTR |: NT R < n>
STAT:QUES:PTR |: NT R ?
STAT:QUES:EVEN?
STAT:QUES:ENAB <n>
STAT:QUES:ENAB
STAT:OPER:COND?
STAT:OPER:EVEN?
STAT:OPER:ENAB <n>
STAT:OPER:ENAB
STAT:OPER:PTR |: NT R < n>
STAT:OPER:PTR |: NT R ?
32 32
32
ERROR QUEUE
QUEUE
NOT
EMPTY
Err
Err
Err
44
2
ERROR
Status Commands
Language Reference 5
Status commands program the power supply’s status registers. As
shown in the following figure, the power supply has three groups of
status registers; Operation, Questionable, and Standard Event. The
Operation and Questionable status groups each consist of the Condition,
Enable, and Event registers and NTR and PTR filters.
Series N5700 User’s Guide 73
5 Language Reference
Bit Position
9 8
5
Bit Value
Bit Name
STATus:PRESet
STATus:OPERation[:EVENt]?
The Standard Event group is programmed with Common commands as
described later in this section. Common commands also control
additional status functions such as the Service Request Enable and the
Status Byte registers.
This command sets all defined bits in the Operation and Questionable
PTR registers. The command clears all defined bits in the Operation and
Questionable NTR and Enable registers.
This query returns the value of the Operation Event register. The Event
register is a read-only register, which stores (latches) all events that are
passed by the Operation NTR and/or PTR filter. Reading the Operation
Event register clears it. The bit configuration of the Operation status
registers is as follows:
15-11 10
−
−
CC = The output is in constant current
CV = The output is in constant voltage
WTG = The unit is waiting for a transient trigger
1024
CC
−
−
256
CV
7-6
−
−
32
WTG
4-0
−
−
STATus:OPERation:CONDition?
This query returns the value of the Operation Condition register. That is a
read-only register, which holds the live (unlatched) operational status of
the power supply.
STATus:OPERation:ENABle <value>
STATus:OPERation:ENABle?
This command and its query set and read the value of the Operational
Enable register. This register is a mask for enabling specific bits from the
Operation Event register to set the operation summary bit (OPER) of the
Status Byte register. This bit (bit 7) is the logical OR of all the
Operational Event register bits that are enabled by the Status Operation
Enable register. The Preset value = 0.
74 Series N5700 User’s Guide
STATus:OPERation:NTR <value>
Bit Position
9
3 2 1
Bit Value
2
Bit Name
STATus:OPERation:PTR <value>
STATus:OPERation:NTR?
STATus:OPERation:PTR?
These commands set or read the value of the Operation NTR (NegativeTransition) and PTR (Positive-Transition) registers. These registers serve
as polarity filters between the Operation Condition and Operation Event
registers to cause the following actions:
When a bit in the Operation NTR register is set to 1, then a 1-to-0
transition of the corresponding bit in the Operation Condition
register causes that bit in the Operation Event register to be set.
When a bit of the Operation PTR register is set to 1, then a 0-to-1
transition of the corresponding bit in the Operation Condition
register causes that bit in the Operation Event register to be set.
If the same bits in both NTR and PTR registers are set to 1, then any
transition of that bit at the Operation Condition register sets the
corresponding bit in the Operation Event register.
If the same bits in both NTR and PTR registers are set to 0, then no
transition of that bit at the Operation Condition register can set the
corresponding bit in the Operation Event register.
Language Reference 5
The Preset value are: NTR = 0; PTR = 32767
STATus:QUEStionable[:EVENt]?
This query returns the value of the Questionable Event register. The
Event register is a read-only register, which stores (latches) all events
that are passed by the Questionable NTR and/or PTR filter. Reading the
Questionable Event register clears it. The bit configuration of the
Questionable status registers is as follows:
15-11 10
−
−
UNR = The output is unregulated
INH = The output is turned off by one of the external J1 inhibit signals
OT = The output is disabled by the over-temperature protection
PF = The output is disabled because AC power has failed
OC = The output is disabled by the over-current protection
OV = The output is disabled by the over-voltage protection
1024 512
UNR INH
STATus:QUEStionable:CONDition?
This query returns the value of the Questionable Condition register. That
is a read-only register, which holds the real-time (unlatched)
questionable status of the power supply.
8-5 4
−
−
16
OT
4
−
PF OC OV
−
0
1
Series N5700 User’s Guide 75
5 Language Reference
STATus:QUEStionable:ENABle <value>
STATus:QUEStionable:ENABle?
STATus:QUEStionable:NTR <value>
STATus:QUEStionable:PTR <value>
STATus:QUEStionable:NTR?
STATus:QUEStionable:PTR?
This command and its query set and read the value of the Questionable
Enable register. This register is a mask for enabling specific bits from the
Questionable Event register to set the questionable summary bit (QUES)
of the Status Byte register. This bit (bit 3) is the logical OR of all the
Questionable Event register bits that are enabled by the Questionable
Status Enable register. The Preset value = 0.
These commands set or read the value of the Questionable NTR
(Negative-Transition) and PTR (Positive-Transition) registers. These
registers serve as polarity filters between the Questionable Condition
and Questionable Event registers to cause the following actions:
When a bit of the Questionable NTR register is set to 1, then a 1-to-
0 transition of the corresponding bit of the Questionable Condition
register causes that bit in the Questionable Event register to be set.
*CLS
When a bit of the Questionable PTR register is set to 1, then a 0-to-
1 transition of the corresponding bit in the Questionable Condition
register causes that bit in the Questionable Event register to be set.
If the same bits in both NTR and PTR registers are set to 1, then any
transition of that bit at the Questionable Condition register sets the
corresponding bit in the Questionable Event register.
If the same bits in both NTR and PTR registers are set to 0, then no
transition of that bit at the Questionable Condition register can set
the corresponding bit in the Questionable Event register.
The Preset values are: NTR = 0; PTR = 32767
This command causes the following actions on the status system:
Clears the Standard Event Status, Operation Status Event, and
Questionable Status Event registers
Clears the Status Byte and the Error Queue
If *CLS immediately follows a program message terminator (<NL>),
then the output queue and the MAV bit are also cleared.
76 Series N5700 User’s Guide
*ESE
Bit Position
6 5 4 3 2 1
Bit Value
16 8 4
Bit Name
*ESE?
Language Reference 5
This command programs the Standard Event Status Enable register bits.
The programming determines which events of the Standard Event Status
Event register (see *ESR?) are allowed to set the ESB (Event Summary
Bit) of the Status Byte register. A "1" in the bit position enables the
corresponding event.
All of the enabled events of the Standard Event Status Event Register
are logically OR-ed to cause the Event Summary Bit (ESB) of the Status
Byte Register to be set. The query reads the Standard Event The query
reads the Standard Event Status Enable register. The bit configuration of
the Standard Event register is as follows:
7
128
PON
PON = Power-on has occurred
CME = Command error
EXE = Execution error
32
−
CME EXE DDE QUE
−
DDE = Device-dependent error
QUE = Query error
OPC = Operation complete
0
1
−
OPC
−
*ESR?
*OPC
*OPC?
This query reads the Standard Event Status Event register. Reading the
register clears it. The bit configuration is the same as the Standard
Event Status Enable register (see *ESE).
This command causes the instrument to set the OPC bit (bit 0) of the
Standard Event Status register when the instrument has completed all
pending operations. Pending operations are complete when:
All commands sent before *OPC have been executed. This includes
overlapped commands. Most commands are sequential and are
completed before the next command is executed. Commands that
affect output voltage, current or state, relays, and trigger actions are
executed in parallel (or overlapped) with subsequent commands
sent to the power supply. The *OPC command provides notification
that all overlapped commands have been completed.
All triggered actions are completed
*OPC does not prevent processing of subsequent commands, but bit 0
will not be set until all pending operations are completed.
*OPC? causes the instrument to place an ASCII "1" in the Output Queue
when all pending operations are completed. Unlike *OPC, *OPC?
prevents processing of all subsequent commands. It can be used at the
end of a command line so that the program can monitor the bus for data
until it receives the "1" from the Output Queue.
Series N5700 User’s Guide 77
5 Language Reference
Bit Position
6 5 4 3 2
Bit Value
64 32 16 8 4
Bit Name
*SRE
*SRE?
*STB?
This command sets the condition of the Service Request Enable
Register. This register determines which bits from the Status Byte
Register are allowed to set the Master Status Summary (MSS) bit and
the Request for Service (RQS) summary bit. A 1 in any Service Request
Enable Register bit position enables the corresponding Status Byte
Register bit and all such enabled bits then are logically OR-ed to cause
Bit 6 of the Status Byte Register to be set.
When the controller conducts a serial poll in response to SRQ, the RQS
bit is cleared, but the MSS bit is not. When *SRE is cleared (by
programming it with 0), the power supply cannot generate an SRQ to the
controller. The query returns the current state of *SRE.
This query reads the Status Byte register, which contains the status
summary bits and the Output Queue MAV bit. Reading the Status Byte
register does not clear it. The input summary bits are cleared when the
appropriate event registers are read. The MAV bit is cleared at poweron, by *CLS' or when there is no more response data available.
*WAI
A serial poll also returns the value of the Status Byte register, except
that bit 6 returns Request for Service (RQS) instead of Master Status
Summary (MSS). A serial poll clears RQS, but not MSS. When MSS is
set, it indicates that the power supply has one or more reasons for
requesting service.
7
128
OPER MSS
(RQS)
OPER = Operation status
summary
MSS = Master status summary
(RQS) = Request for service
ESB = Event status byte summary
This command instructs the power supply not to process any further
commands until all pending operations are completed. Pending
operations are as defined under the *OPC command. *WAI can be
aborted only by sending the power supply a Device Clear command.
ESB MAV QUES ERR
MAV = Message available
QUES = Questionable status
summary
ERR = Error queue not empty
1 − 0
−
−
78 Series N5700 User’s Guide
System Commands
LOCal
The instrument is set to front panel control (front panel keys are active).
REMote
The instrument is set to remote interface control (front panel keys are
active).
RWLock
The front panel keys are disabled (the instrument can only be controlled
via the remote interface).
SYSTem:COMMunicate:RLSTate LOCal|REMote|RWLock
SYSTem:COMMunicate:RLSTate?
Language Reference 5
System commands control system functions that are not directly related
to output control, measurement, or status functions. Common
commands are also used to control system functions.
This command configures the remote/local state of the instrument
according to the following settings.
The remote/local state can also be set by interface commands over the
GPIB and some other I/O interfaces. When multiple remote
programming interfaces are active, the interface with the most recently
changed remote/local state determines the instrument’s remote/local
state.
The remote/local state is unaffected by *RST or any SCPI commands
other than SYSTem:COMMunicate:RLState. At power-on however, the
communications setting always returns to LOCal.
SYSTem:COMMunicate:TCPip:CONTrol?
This query returns the control connection port number. This is used to
open a control socket connection to the instrument. Refer to chapter 4
under “Using Sockets” for more information.
SYSTem:ERRor?
This query returns the next error number and its corresponding message
string from the error queue. The queue is a FIFO (first-in, first-out) buffer
that stores errors as they occur. As it is read, each error is removed from
the queue. When all errors have been read, the query returns 0, NO
ERROR. If more errors are accumulated than the queue can hold, the
last error in the queue will be -350, TOO MANY ERRORS (see Appendix
C for error codes).
SYSTem:VERSion?
This query returns the SCPI version number to which the instrument
complies. The returned value is of the form YYYY.V, where YYYY
represents the year and V is the revision number for that year.
Series N5700 User’s Guide 79
5 Language Reference
*IDN?
*OPT?
*RCL <state>
This query requests the power supply to identify itself. It returns a string
of four fields separated by commas.
<manufacturer>
xxxxxA
0
<A.xx.xx>,<A.xx.xx>
This query requests the unit to identify any installed options. A 0
indicates no options are installed.
This command restores the power supply to a state that was previously
stored in memory locations 0 through 15 with the *SAV command. Note
that you can only recall a state from a location that contains a
previously-stored state.
Manufacturer
Model number followed by a letter suffix
Zero or serial number if available
Firmware revision, power supply revision
NOTE
All saved instrument states are lost when the unit is turned off.
*RST
This command resets the power supply to a factory-defined state. This
state is defined as follows. Note that *RST also forces an ABORt
command. The *RST settings are as follows:
*SAV <state>
This command stores the present state of the power supply to memory
locations 0 through 15.
NOTE
All saved instrument states are lost when the unit is turned off.
CAL:STAT Off [SOUR:]CURR:PROT:STAT Off
INIT:CONT Off [SOUR:]VOLT 0
OUTP Off [SOUR:]VOLT:LIM 0
[SOUR:]CURR 0 [SOUR:]VOLT:TRIG 0
[SOUR:]CURR:TRIG 0 [SOUR:]VOLT:PROT MAXimum
*TST?
Does nothing. This query always returns a zero.
80 Series N5700 User’s Guide
Trigger Commands
ABORt
INITiate[:IMMediate][:TRANsient]
INITiate:CONTinuous[:TRANsient] ON|OFF
INITiate:CONTinuous[:TRANsient]?
Language Reference 5
Trigger commands consist of the Abort, Trigger, and Initiate commands.
Initiate commands initialize the trigger system. Trigger commands
control the triggering of the power supply.
This command cancels any trigger actions in progress and returns the
trigger system to the IDLE state, unless INIT:CONT is enabled. It also
resets the WTG bit in the Status Operation Condition register. ABORt is
executed at power-on and upon execution of *RST.
This command controls the enabling of output triggers. When a trigger is
enabled, a trigger causes the specified triggering action to occur. If the
trigger system is not enabled, all triggers are ignored.
This command continuously initiates output triggers. The enabled state
is On (1); the disabled state is Off (0). When disabled, the trigger system
must be initiated for each trigger with the INITiate command.
TRIGger[:TRANsient][:IMMediate]
If the trigger system has been initiated, this command generates an
immediate output trigger. When sent, the output trigger will:
Initiate an output change as specified by the CURR:TRIG or
VOLT:TRIG settings.
Clear the WTG bits in the Status Operation Condition register after
the trigger action has completed.
TRIGger:SOURce BUS
TRIGger:SOURce?
This command selects the trigger source for the output trigger system.
Only BUS can be selected as the trigger source.
*TRG
This command generates a trigger when the trigger source is set to BUS.
The command has the same affect as the Group Execute Trigger (<GET>)
command.
Series N5700 User’s Guide 81
6
Programming Examples
Output Programming Example ...................................................... 84
Trigger Programming Example ...................................................... 86
This chapter contains several example programs to help you develop
programs for your own application. The example programs are for
illustration only, and are provided with the assumption that you are
familiar with the programming language being demonstrated and the
tools used to create and debug procedures. See Chapter 5, “Language
Dictionary” for the SCPI command syntax.
You have a royalty-free right to use, modify, reproduce and distribute the
example programs (and/or any modified version) in any way you find
useful, provided you agree that Keysight Technologies has no warranty,
obligations, or liability for any example programs.
The example programs are written in Microsoft Visual Basic 6.0 using the
VISA COM IO library. The VISA COM library must be downloaded from
the Automation-Ready CD-ROM to use these programs. For information
about using VISA COM in another Visual Basic project, refer to
“Programming Your Instruments” in the USB/LAN/GPIB Interfaces
Connectivity Guide, also included on the Automation-Ready CD-ROM.
6 Programming Examples
Output Programming Example
This program sets the voltage, current, over-voltage, and the overcurrent protection. It turns the output on and takes a voltage
measurement. When done, the program checks for instrument errors
and gives a message if there is an error.
Sub main_EZ()
Dim IDN As String
Dim IOaddress As String
Dim ErrString As String
' This variable controls the voltage
Dim VoltSetting As Double
' This variable measures the voltage
Dim measVolt As Double
' This variable controls the current
Dim CurrSetting As Double
' These variables control the over voltage protection settings
Dim overVoltSetting As Double
' These variables control the over current protection
Dim overCurrOn As Long
'These variable are neccessary to initialize the VISA COM.
Dim ioMgr As KeysightRMLib.SRMCls
Dim Instrument As VisaComLib.FormattedIO488
' The following command line provides the program with the VISA name of the
' interface that it will communicate with. It is currently set to use GPIB.
IOaddress = "GPIB0::5::INSTR"
' Use the following line for LAN communication
' IOaddress="TCPIP0::141.25.36.214"
' Use the following line instead for USB communication
' IOaddress = "USB0::2391::1799::US00000002"
' Initialize the VISA COM communication
Set ioMgr = New KeysightRMLib.SRMCls
Set Instrument = New VisaComLib.FormattedIO488
Set Instrument.IO = ioMgr.Open(IOaddress)
VoltSetting = 3
CurrSetting = 1.5 ' amps
overVoltSetting = 10
overCurrOn = 1 '1 for on, 0 for off
With Instrument
' Send a power reset to the instrument
.WriteString "*RST"
' Query the instrument for the IDN string
.WriteString "*IDN?"
IDN = .ReadString
' Set the voltage
.WriteString "VOLT" & Str$(VoltSetting)
84 Series N5700 User’s Guide
' Set the over voltage level
.WriteString "VOLT:PROT:LEV " & Str$(overVoltSetting)
' Turn on over current protection
.WriteString "CURR:PROT:STAT " & Str$(overCurrOn)
' Set the current level
.WriteString "CURR " & Str$(CurrSetting)
' Turn the output on
.WriteString "OUTP ON"
' Make sure that the output is on before continuing
.WriteString "*OPC?"
.ReadString
' Measure the voltage
.WriteString "Meas:Volt?"
measVolt = .ReadNumber
MsgBox "Measured Voltage is " & Str$(measVolt)
' Check instrument for any errors
.WriteString "Syst:err?"
ErrString = .ReadString
' give message if there is an error
If Val(ErrString) Then
MsgBox "Error in instrument!" & vbCrLf & ErrString
End If
End With
End Sub
Programming Examples 6
Series N5700 User’s Guide 85
6 Programming Examples
Trigger Programming Example
This example illustrates how to set up and trigger a voltage and current
change. The voltage is measured before and after the trigger.
Sub main_Trig()
Dim IDN As String
Dim IOaddress As String
Dim ErrString As String
Dim msg1 As String
' This variable is used to monitor the status
Dim stat As Long
' This variable controls the voltage
Dim VoltSetting As Double
' This variable measures the voltage
Dim MeasureVolt As Double
' This variable controls the current
Dim CurrSetting As Double
' This variable represents the trigger current setting
Dim trigCurrSetting As Double
' This variable controls the triggered voltage setting
Dim trigVoltSetting As Double
' This constant represents the register value for Waiting for Trigger
Const WTG = 32
' These variables are necessary to initialize the VISA COM
Dim ioMgr As KeysightRMLib.SRMCls
Dim Instrument As VisaComLib.FormattedIO488
' The following line provides the VISA name of the GPIB interface
IOaddress = "GPIB0::5::INSTR"
' Use the following line instead for LAN communication
' IOaddress="TCPIP0::141.25.36.214"
' Use the following line instead for USB communication
' IOaddress = "USB0::2391::1799::US00000002"
' Initialize the VISA COM communication
Set ioMgr = New KeysightRMLib.SRMCls
Set Instrument = New VisaComLib.FormattedIO488
Set Instrument.IO = ioMgr.Open(IOaddress)
VoltSetting = 3 ' volts
CurrSetting = 2 ' amps
trigVoltSetting = 5 ' volts
trigCurrSetting = 3 ' amps
With Instrument
' Send a power reset to the instrument
.WriteString "*RST"
' Query the instrument for the IDN string
.WriteString "*IDN?"
IDN = .ReadString
86 Series N5700 User’s Guide
Programming Examples 6
' Set the voltage
.WriteString "VOLT" & Str$(VoltSetting)
' Set the current level
.WriteString "CURR " & Str$(CurrSetting)
' Set the triggered voltage and current levels
.WriteString "VOLT:TRIG " & Str$(trigVoltSetting)
.WriteString "CURR:TRIG " & Str$(trigCurrSetting)
' Turn the output on
.WriteString "OUTP ON"
' Make sure that the output is on
.WriteString "*OPC?"
.ReadString
' Measure the voltage before triggering the change
.WriteString "MEAS:VOLT?"
MeasureVolt = .ReadNumber
' Save the value for later display
msg1$ = "Voltage before trigger = " & Str$(MeasureVolt)
' Initiate the trigger system
.WriteString "INIT"
' Make sure that the trigger system is initiated
Do
.WriteString "STAT:OPER:COND?"
stat = .ReadNumber
Loop Until ((stat And WTG) = WTG)
' Trigger the unit
.WriteString "*TRG"
'Make sure that the trigger is done
.WriteString "*OPC?"
.ReadString
' Measure the voltage after triggering the change
.WriteString "MEAS:VOLT?"
MeasureVolt = .ReadNumber
' Display the measured values
MsgBox msg1$ + Chr$(13) + "Voltage after trigger = " & Str$(MeasureVolt)
' Check instrument for any errors
.WriteString "Syst:err?"
ErrString = .ReadString
' Give message if there is an error
If Val(ErrString) Then
MsgBox "Error in instrument!" & vbCrLf & ErrString
End If
End With
End Sub
Series N5700 User’s Guide 87
Appendix A
Specifications
Performance Specifications ........................................................... 90
Supplemental Characteristics ........................................................ 91
Outline Diagram ............................................................................. 93
This chapter lists the specifications and supplemental characteristics of
the Keysight N5700 power supplies. A dimensional line drawing of the
unit is included at the end of the chapter.
Unless otherwise noted, specifications are warranted over the ambient
temperature range of 0 to 40°C. Sensing is at the rear terminals of the
power supply after a 30-minute warm-up period. Sense terminals are
externally jumpered to their respective output terminals.
Supplemental characteristics are not warranted but are descriptions of
typical performance determined either by design or type testing.
Appendix A Specifications
Model
N5741A
N5761A
N5742A
N5762A
N5743A
N5763A
N5744A
N5764A
N5745A
N5765A
N5746A
N5766A
N5747A
N5767A
N5748A
N5768A
N5749A
N5769A
N5750A
N5770A
N5751A
N5771A
N5752A
N5772A
DC Output Ratings:
NOTE 1
8V
Output Ripple and Noise:
Load Effect:
Source Effect:
Programming Accuracy:
Measurement Accuracy:
Load Transient Recovery Time:
Performance Specifications
Keysight Models N5741A – N5752A and N5761A – N5772A
Voltage
Current 750W
Current 1500W
Power 750W
Power 1500W
CV p-p
CV rms
NOTE 2
NOTE 3
6V
100A 90A 60A 38A 25A 19A 12.5A 9.5A 7.5A 5A 2.5A 1.3A
180A 165A 120A 76A 50A 38A 25A 19A 15A 10A 5A 2.6A
600W 720W 750W 760W 750W 760W 750W 760W 750W 750W 750W 780W
1080W 1320W 1500W 1520W 1500W 1520W 1500W 1520W 1500W 1500W 1500W 1560W
60mV 60mV 60mV 60mV 60mV 60mV 60mV 80mV 80mV 100mV 150mV 300mV
8mV 8mV
12.5V 20V
8mV 8mV
30V
8mV
40V
8mV 8mV
60V
80V
8mV
100V 150V 300V 600V
8mV 12mV 20mV 60mV
(change from 10% to 90% of full load)
Voltage
Current 750W
Current 1500W
2.6mV 2.8mV 3.25mV 4mV
25mA 23mA 17mA 12.6mA 10mA 8.8mA 7.5mA 6.9mA 6.5mA 6mA 5.5mA 5.26mA
41mA 38mA 29mA 20.2mA 15mA 12.6mA 10mA 8.8mA 8mA
5mV
6mV 8mV 10mV 12mV 17mV 32mV 62mV
7mA
6mA 5.5mA
(change from 85-132 VAC input or 170-265 VAC input)
Voltage
Current 750W
Current 1500W
Voltage 0.05%+
Current 750W 0.1%+ 100mA 90mA 60mA 38mA 25mA 19mA 12.5mA 9.5mA 7.5mA 5mA 2.5mA 1.3mA
Current 1500W 0.1%+ 180mA 165mA 120mA 76mA 50mA 38mA 25mA 19mA 15mA 10mA 5mA 2.6mA
2.6mV 2.8mV 3.25mV 4mV
12mA 11mA 8mA 5.8mA 4.5mA 3.9mA 3.25mA 2.95mA 2.75mA 2.5mA 2.25mA 2.13mA
20mA 18.5mA 14mA 9.6mA 7mA 5.8mA 4.5mA 3.9mA 3.5mA 3mA 2.5mA 2.26mA
NOTE 1
3mV 4mV 6.25mV 10mV 15mV 20mV 30mV 40mV 50mV 75mV 150mV 300mV
5mV
6mV 8mV 10mV 12mV 17mV 32mV 62mV
Voltage 0.1%+ 6mV 8mV 12.5mV 20mV 30mV 40mV 60mV 80mV 100mV 150mV 300mV 600mV
Current 750W 0.1%+ 300mA 270mA 180mA 114mA 75mA 57mA 37.5mA 28.5mA 22.5mA 15mA 7.5mA 3.9mA
Current 1500W 0.1%+ 540mA 495mA 360mA 228mA 150mA 114mA 75mA 57mA 45mA 30mA 15mA 7.8mA
(time for output voltage to recover within 0.5% of its rated output for a load change from 10 to 90% of its rated output current)
Time
Voltage set point
NOTE 1
Minimum voltage is guaranteed to a maximum of 0.2% of the rated output voltage.
Minimum current is guaranteed to a maximum of 0.4% of the rated output current.
NOTE 2
20MHz
NOTE 3
From 5Hz - 1MHz
≤ 1.5ms ≤ 1.5ms ≤ 1.5ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 2ms ≤ 2ms ≤ 2ms
from 10% to 100% of rated output
90 Series N5700 User’s Guide
Supplemental Characteristics
Model
N5741A
N5761A
N5742A
N5762A
N5743A
N5763A
N5744A
N5764A
N5745A
N5765A
N5746A
N5766A
N5747A
N5767A
N5748A
N5768A
N5749A
N5769A
N5750A
N5770A
N5751A
N5771A
N5752A
N5772A
Output Response Time:
Command Response Time:
Remote Sense Compensation:
1V 1V 1V
2V 3V 4V 5V 5V 5V
Over-voltage Protection:
1V
3V
Output Ripple and Noise:
Programming Resolution:
Measurement Resolution:
Front Panel Display Accuracy:
Temperature Drift:
Temperature Coefficient:
Current
Analog Programming and Monitoring:
Vout voltage
Iout voltage
Vout resistance
Iout monitor
Vout monitor
On/Off control
PS OK signal
CV/CC signal
Enable/Disable
Keysight Models N5741A – N5752A and N5761A – N5772A
Specifications Appendix A
(to settle to within ±1.0% of the rated output, with a resistive load)
Up, full load
Down, full load
Down, no load
0.08s 0.08s 0.08s 0.08s 0.08s 0.08s 0.08s 0.15s 0.15s 0.15s 0.15s 0.25s
0.05s 0.05s 0.05s 0.05s 0.08s 0.08s 0.08s 0.15s 0.15s 0.15s 0.15s 0.30s
0.5s
0.6s
0.7s
0.8s
0.9s
1.0s
1.1s
1.2s
1.5s
2.0s
3.0s
4s
(add this to the output response time to obtain the total programming time)
55 ms
Volts/load lead
Range
Accuracy
1V
0.5-7.5V 0.5-10V 1-15V 1-24V 2-36V 2-44V 5-66V 5-88V
0.06V 0.08V 0.125V 0.20V 0.30V 0.40V 0.60V 0.80V
1.5V
5V
5-110V 5-165V 5-330V 5-660V
1.5V
6V
(From 5Hz-1MHz, at 10% to 100% of output voltage at full load (for 6V units from 33% to 100% of
output voltage)
CC rms 750W
CC rms 1500W 360mA 330mA 240mA 152mA 125mA 95mA 75mA 57mA 45mA 35mA 25mA 12mA
Voltage
Current 750W
Current 1500W
200mA 180mA 120mA 76mA 63mA 48mA 38mA 29mA 23mA 18mA 13mA 8mA
0.72mV 0.96mV 1.5mV 2.4mV 3.6mV 4.8mV 7.2mV 9.6mV 12mV 18mV 36mV 72mV
12mA 10.8mA 7.2mA 4.56mA 3mA 2.3mA 1.5mA 1.14mA 0.9mA 0.6mA 0.3mA 0.156mA
21.6mA 19.8mA 14.4mA 9.12mA 6mA 4.6mA 3mA 2.28mA 1.8mA 1.2mA 0.6mA 0.312mA
(4 digits; +% of rated output; ±1 count)
Voltage
Current 750W
Current 1500W
30mV 40mV 62.5mV 100mV 150mV 200mV 300mV 400mV 500mV 750mV 1.5 V 3 V
500mA 450mA 300mA 190mA 125mA 95mA 62.5mA 47.5mA 37.5mA 25mA 12.5mA 6.5mA
900mA 825mA 600mA 380mA 250mA 190mA 125mA 95mV 75mA 50mA 25m 13mA
(over 8 hours, after a 30 minute warm-up, with constant line, load, and temperature)
Voltage
Current 750W
Current 1500W
3mV 4mV 6.25mV 10mV 15mV 20mV 30mV 40mV 50mV 75mV 150mV 300mV
50mA 45mA 30mA 19mA 12.5mA 9.5mA 6.25mA 4.75mA 3.75mA 2.5mA 1.25mA 6.5mA
90mA 82.5mA 60mA 38mA 25mA 19mA 12.5mA 9.5mA 7.5mA 5mA 2.5mA 1.3mA
(after a 30 minute warm-up)
Voltage and
100 PPM/°C from rated output voltage or current
0 - 100%, 0-5V/10V, user selectable, Accuracy & linearity = +/-0.5% of rated Vout
0 - 100%, 0-5V/10V, user selectable, Accuracy & linearity = +/-1% of rated Iout
0 - 100%, 0-5kΩ/10kΩ, user selectable, Accuracy & linearity = +/-1% of rated Vout
Iout resistance
0 - 100%, 0-5kΩ/10kΩ, user selectable, Accuracy & linearity = +/-1.5% of rated Iout
0-5V/10V, user selectable, Accuracy = 1%
0-5V/10V, user selectable, Accuracy = 1%
Electrical voltage; 0-6V/2-15V or dry contact, user selectable logic
5V = OK; 0V = FAIL; 500Ω series resistance
CV = TTL high (4-5V) source current 10mA; CC = TTL high (4-5V) sink current 10mA
Dry contact. Open=Off, Short=On. Maximum voltage at terminal= 6V.
Series N5700 User’s Guide 91
Appendix A Specifications
Model
N5741A
N5761A
N5742A
N5762A
N5743A
N5763A
N5744A
N5764A
N5745A
N5765A
N5746A
N5766A
N5747A
N5767A
N5748A
N5768A
N5749A
N5769A
N5750A
N5770A
N5751A
N5771A
N5752A
N5772A
Series and Parallel Capability:
Savable states:
Interface Capabilities:
Environmental Conditions:
and
Regulatory Compliance:
Acoustic Noise Declaration:
Output Terminal Isolation:
AC Input:
Keysight Models N5741A – N5752A and N5761A – N5772A
Parallel operation
Series operation
In volatile memory 16 (in memory locations 0-15)
GPIB
LXI Compliance
USB 2.0
10/100 LAN
Environment
Operating temp.
Storage temp.
Operating humidity
Storage humidity
Altitude
EMC
Safety
Up to 4 identical units can be connected in master/slave mode with single–wire current balancing
Up to 2 identical units can be connected using external protection diodes
SCPI - 1993, IEEE 488.2 compliant interface
LXI Core 2011 (only apples to units with the LXI label on the front panel)
Requires Keysight IO Library version L.01.01 and up, or 14.0 and up
Requires Keysight IO Library version L.01.01 and up, or 14.0 and up
Indoor use, installation category II (AC input), pollution degree 2
0°C to 40°C @ 100% load
–20°C to 70°C
Up to 90% relative humidity (no condensation)
10% to 95% relative humidity (no condensation)
Up to 3000 meters.
Above 2000m, derate the output current by 2%/100m
1500W models from 60V to 600V, derate either the output current or the ambient temperature, but not both.)
Complies with European EMC Directive for test and measurement products.
● IEC/EN 61326-1
● CISPR 11, Group 1, class A
● AS/NZS CISPR 11
● ICES/NMB-001
Complies with the Australian standard and carries the C-Tick mark.
This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme NMB-001 du Canada.
Complies with the European Low Voltage Directive and carries the CE-marking.
Conforms to UL 61010-1 and CSA C22.2 61010-1.
derate the maximum ambient temperature by 1°C/100m. (For
6V to 60V units
80V to 600V units No output terminal may be more than +/- 600 VDC from any other terminal or chassis ground
Statements provided to comply with requirements of the German Sound Emission Directive, from 18 January 1991:
Sound Pressure Lp <70 dB(A), * At Operator Position, * Normal Operation, * According to EN 27779 (Type Test).
Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz, * Normaler Betrieb, * Nach EN 27779 (Typprüfung).
No output terminal may be more than +/- 60 VDC from any other terminal or chassis ground
Nominal Input
Input Current 750W
Input Current 1500W
Input Range
Power Factor
Efficiency
Inrush Current
100 – 240 VAC; 50/60Hz
10.5A @ 100 VAC nominal; 5A @ 200 VAC nominal
21A @ 100 VAC nominal; 11A @ 200 VAC nominal
85 – 265 VAC; 47 – 63 Hz.
0.99 at nominal input and rated output power
76% – 87% for 750W units; 77% – 88% for 1500W units
< 25A for 750W units; < 50 A for 1500W units
92 Series N5700 User’s Guide
Outline Diagram
482.8+/-1.0mm
43.6mm
VOLTAGE DC VOLTS DC AMPS CURRENT
PROT FINE LIMIT UVL OCP/488 LAN OUT ON
OVP
POWER
I
O
N5749A
100V/7.5A 750W
System DC Power Supply
A A A
57.8+/-0.5
92.0+/-0.5 92.0+/-0.5
21.0
433+/-1.0mm
507.0+/-1.0mm
22.0mm
3.0mm
30.0mm
Bus-Bar Detail
6V to 60V Models
8.5mm
Strain-Relief Detail
1500W Models
35mm
AC
INPUT
O
N
OF
F
422.8+/-1.0mm
+V -V
NOT ACTIVE
J2
SW1
GPIB
ANALOG PROGRAMMING
+S+LSNC-LC-S
1 2 3 4 5 6 7 8 9
10/100 Ethernet
LINK
TX
J1
467.0+/-1.0mm
31.8mm
25.0
6.8x10mm
6.8mm
39.5+/-0.5mm
Specifications Appendix A
NOTES:
Holes marked “A” are for chassis slide mounting.
Use only screws designated #10-32x0.38” maximum.
Series N5700 User’s Guide 93
NOTE
power supply passes the verification tests, the unit is operating within its
Appendix B
Verification and Calibration
Verification ...................................................................................... 96
Calibration .................................................................................... 115
The verification procedures described in this appendix verify that the
power supply is operating normally and is within published
specifications.
This appendix also includes calibration procedures for the Keysight
N5700 power supplies. Instructions are given for performing the
procedures from a controller over the GPIB.
Perform the verification tests before calibrating your power supply. If the
calibration limits and does not need to be re-calibrated.
The recommended calibration interval for Keysight N5700 power
supplies is one year.
Appendix B Verification and Calibration
Performance
supply is properly calibrated.
Calibration
These procedures calibrate the power supply.
Type
Specifications
Recommended Model
Verification
Verification procedures verify that the power supply is operating
normally and is within published specifications. There are two types of
verification tests:
These tests verify that the power supply meets all of the specifications
listed in Appendix A. They can also be used to verify that the power
If the power supply fails any of the tests or if abnormal test results are
obtained, try calibrating the unit. If calibration is unsuccessful, return the
unit to a Keysight Technologies repair facility (see Appendix D).
Equipment Required
The equipment listed in the following table, or the equivalent to this
equipment, is required for the calibration and performance tests. A test
record sheet may be found at the back of this section.
Digital Voltmeter
Current Monitor
Load Resistor
Electronic Load
GPIB Controller
Oscilloscope
RMS Voltmeter
Differential Amplifier Bandwidth: 20 MHz
Differential Probe
Terminations
Variable-voltage xfmr
or AC source
Resolution: 10 nV @ 1V;
Readout: 8 1/2 digits
Accuracy: 20 ppm
15 A (0.1Ω) 0.04%, TC=5ppm/°C
100 A (0.01Ω) 0.04%, TC=5ppm/°C
300 A (0.001Ω) 0.04%, TC=5ppm/°C
For 750 W models:
0.06Ω, 0.09Ω, 0.21Ω, 0.53Ω, 1.20Ω, 2.11Ω, 4.80Ω, 8.42Ω,
13.33Ω, 30.0Ω, 120Ω, 462Ω - all resistors 1kW minimum.
For 1500 W models:
0.03Ω, 0.04Ω, 0.10Ω, 0.26Ω, 0.60Ω, 1.05Ω, 2.40Ω, 4.21Ω,
6.67Ω, 15.0Ω, 60Ω, 231Ω - all resistors 2kW minimum.
150 V, 100 A minimum (for Models N5741- N5750A)
150 V, 180 A minimum (for Models N5761- N5770A)
Full GPIB capabilities (for calibrating the unit over the GPIB) Keysight 82350B or equivalent
Sensitivity: 1 mV
Bandwidth Limit: 20 MHz
Probe: 1:1 with RF tip
True RMS
Bandwidth: 20 MHz
Sensitivity: 100 µV
100:1/10:1 selectable
1 – 50Ω BNC termination
Adjustable to highest rated input voltage range.
Power: 2000 VA
Keysight 3458A or equivalent
Guildline 9230/15
Guildline 9230/100
Guildline 9230/300
Keysight N3300A mainframe,
with 3 - N3305A modules
Keysight Infiniium or
equivalent
Rhode and Schwartz Model
URE3 or equivalent
LeCroy DA1855A, DA1850A,
or equivalent
LeCroy DXC100A or eqivalent
Keysight 6813B or equivalent
96 Series N5700 User’s Guide
Measurement Techniques
A.
Electronic load
or resistor
DC voltmeter,
scope, or
rms voltmeter
Load
Resistor
+
+
+
B.
Differential amplifier
C.
Scope or
rms voltmeter
Current
shunt
+
DC voltmeter,
scope, or
rms voltmeter
+
Electronic load
or resistor
output
50 ohm
termination
input
BNC
+V -V
Power Supply
+S +LS -LS -S
+V -V
Power Supply
+S +LS -LS -S
+V -V
Power Supply
+S +LS -LS -S
Differential
probe pair
Electronic Load
Many of the test procedures require the use of a variable load capable of
dissipating the required power. If a variable resistor is used, switches
should be used to either; connect, disconnect, or short the load resistor.
For most tests, an electronic load can be used. The electronic load is
considerably easier to use than load resistors, but it may not be fast
enough to test transient recovery time and may be too noisy for the
noise (PARD) tests.
Fixed load resistors may be used in place of a variable load, with minor
changes to the test procedures. Also, if computer controlled test setups
are used, the relatively slow (compared to computers and system
voltmeters) settling times and slew rates of the power supply may have
to be taken into account. "Wait" statements can be used in the test
program if the test system is faster than the power supply.
Current-Monitoring Resistor
The 4-terminal current shunt is used to eliminate output current
measurement error caused by voltage drops in the load leads and
connections. It has special current-monitoring terminals inside the load
connection terminals. Connect the voltmeter directly to these currentmonitoring terminals.
Verification and Calibration Appendix B
Test Set-up
The following figure illustrates the test set-up used for the verification
procedures.
Series N5700 User’s Guide 97
Appendix B Verification and Calibration
WARNING
SHOCK HAZARD Before starting the verification procedures, check to
make sure that the startup mode is set to Safe-Start (see page 42).
Constant Voltage Tests
Refer to the appropriate test record in the following section for the
instrument settings for each of the following tests.
Voltage Programming and Readback Accuracy
Test category = performance, calibration
This test verifies that the voltage programming and measurement
functions are within specifications.
1 Turn off the power supply and connect a DVM directly across the +S
and -S terminals as shown in figure A. Do not connect a load.
2 Turn on the power supply and program the output voltage to zero
and the output current to its maximum programmable value (Imax)
with the load off. The CV annunciator should be on and the output
current reading should be approximately zero.
3 Record the output voltage readings on the digital voltmeter (DVM)
as well as the measurement readback. The readings should be
within the limits specified in the test record card for the appropriate
model under Voltage Programming and Readback, Minimum
Voltage Vout.
4 Program the output voltage to its full-scale rating.
5 Record the output voltage readings on the DVM as well as the
measurement readback. The readings should be within the limits
specified in the test record card for the appropriate model under
Voltage Programming and Readback, High Voltage Vout.
CV Load Effect
Test category = performance
This test measures the change in output voltage resulting from a change
in output current from full load to no load.
1 Turn off the power supply and connect a DVM and an electronic
load as shown in figure A.
2 Turn on the power supply and program the output current to its
maximum programmable value (Imax) and the output voltage to its
full-scale value.
3 Set the electronic load for the output’s full-scale current. The CV
annunciator on the front panel must be on. If it is not, adjust the
load so that the output current drops slightly.
4 Record the output voltage reading from the DVM.
5 Open the load and record the voltage reading from the DVM again.
The difference between the DVM readings in steps 4 and 5 is the
load effect, which should not exceed the value listed in the test
record card for the appropriate model under CV Load Effect.
98 Series N5700 User’s Guide
Verification and Calibration Appendix B
CV Source Effect
Test category = performance
This test measures the change in output voltage that results from a
change in AC line voltage from the minimum to maximum value within
the line voltage specifications.
1 Turn off the power supply and connect the ac power line through a
variable voltage transformer.
2 Connect a DVM and an electronic load as shown in figure A. Set the
variable voltage transformer to nominal line voltage.
3 Turn on the power supply and program the output current to its
maximum programmable value (Imax) and the output voltage to its
full-scale value.
4 Set the electronic load for the output’s full-scale current. The CV
annunciator on the front panel must be on. If it is not, adjust the
load so that the output current drops slightly.
5 Adjust the transformer to the low-line voltage (85 VAC for 100/120
nominal line; 170 VAC for 200/240 nominal line).
6 Record the output voltage reading from the DVM.
7 Adjust the transformer to the high-line voltage (132 VAC for
100/120 nominal line; 265 VAC for 200/240 nominal line).
8 Record the output voltage reading on the DVM. The difference
between the DVM reading in steps 6 and 8 is the source effect,
which should not exceed the value listed in the test record card for
the appropriate model under CV Source Effect.
CV Noise
Test category = performance
Periodic and random deviations in the output combine to produce a
residual AC voltage superimposed on the DC output voltage. This
residual voltage is specified as the rms or peak-to-peak output voltage
in the frequency range specified in Appendix A.
1 Turn off the power supply and connect the load resistor, differential
amplifier, and an oscilloscope (ac coupled) to the output as shown in
figure C. Use the indicated load resistor for 750W outputs; use the
indicated load resistor for 1500W outputs.
2 As shown in the diagram, use the differential probe to connect the
differential amplifier to the + and - output terminals. The shields of
the two probes should be connected together. Connect the output
of the differential amplifier to the oscilloscope with a 50 Ω
termination at the input of the oscilloscope.
3 Set the differential amplifier to multiply by ten, divide by one, and 1
Megohm input resistance. The positive and negative inputs of the
differential amplifier should be set to AC coupling. Set the
oscilloscope’s time base to 5 ms/div, and the vertical scale to 10
mV/div. Turn the bandwidth limit on (usually 20 or 30 MHz), and set
the sampling mode to peak detect.
Series N5700 User’s Guide 99
Appendix B Verification and Calibration
4 Program the power supply to program the output current to its
maximum programmable value (Imax) and the output voltage to its
full-scale value and enable the output. Let the oscilloscope run for a
few seconds to generate enough measurement points. On the
Keysight Infiniium scope, the maximum peak-to-peak voltage
measurement is indicated at the bottom of the screen on the right
side. Divide this value by 10 to get the CV peak-to-peak noise
measurement. The result should not exceed the peak-to-peak limits
in the test record form for the appropriate model under CV Ripple
and Noise, peak-to-peak.
(If the measurement contains any question marks, clear the
measurement and try again. This means that some of the data
received by the scope was questionable.)
5 Disconnect the oscilloscope and connect an ac rms voltmeter in its
place. Do not disconnect the 50 termination. Divide the reading of
the rms voltmeter by 10. The result should not exceed the rms limits
in the test record card for the appropriate model under CV Ripple
and Noise - rms.
Transient Recovery Time
Test category = performance
This measures the time for the output voltage to recover to within the
specified value following a 10% to 90% change in the load current.
1 Turn off the power supply and connect the output as in figure A with
the oscilloscope across the +S and -S terminals.
2 Turn on the power supply and program the output current to its
maximum programmable value (Imax) and the output voltage to its
full-scale value. Do not program voltages greater than 200 VDC
when testing the 300 and 600 volt models.
3 Set the electronic load to operate in constant current mode.
Program its load current to 10% of the power supply’s full-scale
current value.
4 Set the electronic load's transient generator frequency to 100 Hz
and its duty cycle to 50%.
5 Program the load's transient current level to 90% of the power
supply's full-scale current value. Turn the transient generator on.
6 Adjust the oscilloscope for a waveform similar to that shown in the
following figure.
7 The output voltage should return to within the specified voltage in
the specified time following the 10% to 90% load change. Check
both loading and unloading transients by triggering on the positive
and negative slope. Record the voltage at time “t” in the
performance test record card under Transient Response.
tttt
v
t
Unloading
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Transient
t
v
Transient
100 Series N5700 User’s Guide
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