Keysight Technologies AC6800 Series Service manual

Operating and
Service Guide
AC6800 Series
Basic AC Sources

Notices
Copyright Notice
© Keysight Technologies, Inc. 2014-15
Manual Part Number
AC6800-90001
Edition
Edition 2, November 2015
Published by
Keysight Technologies, Inc.
550 Clark Drive, Suite 101
Budd Lake, New Jersey 07828
USA
Warranty
THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED "AS IS," AND IS SUBJECT TO BEING
CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY
APPLICABLE LAW, KEYSIGHT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED WITH REGARD TO
THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT SHALL NOT BE
LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE
FURNISHING, USE, OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN.
SHOULD KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS
COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY
TERMS IN THE SEPARATE AGREEMENT WILL CONTROL.
Technology Licenses
The hardware and/or software described in this document are furnished under a license and may be used or
copied only in accordance with the terms of such license.

U.S. Government Rights
The Software is “commercial computer software,” as defined by Federal Acquisition Regulation (“FAR”) 2.101.
Pursuant to FAR 12.212 and 27.405-3 and Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S.
government acquires commercial computer software under the same terms by which the software is customarily
provided to the public. Accordingly, Keysight provides the Software to U.S. government customers under its
standard commercial license, which is embodied in its End User License Agreement (EULA), a copy of which can be
found at http://www.keysight.com/find/sweula. The license set forth in the EULA represents the exclusive authority
by which the U.S. government may use, modify, distribute, or disclose the Software. The EULA and the license set
forth therein, does not require or permit, among other things, that Keysight: (1) Furnish technical information
related to commercial computer software or commercial computer software documentation that is not customarily
provided to the public; or (2) Relinquish to, or otherwise provide, the government rights in excess of these rights
customarily provided to the public to use, modify, reproduce, release, perform, display, or disclose commercial
computer software or commercial computer software documentation. No additional government requirements
beyond those set forth in the EULA shall apply, except to the extent that those terms, rights, or licenses are explicitly
required from all providers of commercial computer software pursuant to the FAR and the DFARS and are set forth
specifically in writing elsewhere in the EULA. Keysight shall be under no obligation to update, revise or otherwise
modify the Software. With respect to any technical data as defined by FAR 2.101, pursuant to FAR 12.211 and
27.404.2 and DFARS 227.7102, the U.S. government acquires no greater than Limited Rights as defined in FAR
27.401 or DFAR 227.7103-5 (c), as applicable in any technical data.
2 Keysight AC6800 Series Operating and Service Guide

Safety and Regulatory Information
This procedure requires the user to send SCPI commands to the instrument. Connect to the instrument via LAN or
USB, and Use the Keysight IO Libraries to send these commands.
General Information
The equipment is for industrial use.
Equipment operators are subject to all applicable safety regulations. Along with the warning and safety notices in
this manual, all relevant safety, accident prevention, and environmental regulations must also be followed. In
particular, the operators of the equipment:
– Must be informed of the relevant safety requirements.
– Must have read and understood the operating manual before using the equipment.
– Must use the designated and recommended safety equipment.
Safety Notices
The following general safety precautions must be observed during all phases of operation of this instrument. Failure
to comply with these precautions or with specific warnings or instructions elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability of
the customer’s failure to comply with the requirements.
A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not
correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING
notice until the indicated conditions are fully understood and met.
Should network communication issues occur, the instrument settings shown in the Browser Web Control page may
not represent the actual state of the instrument. This may result in unexpected hazardous voltages on the output and
sense connections that could result in personal injury, death, or damage to a device under test. Before touching the
output or sense connections or connecting to a device under test, always verify the state of the instrument.
Product Grounding
The instrument is a Class 1 product and is provided with a grounding-type power cord set. The
instrument chassis and cover are connected to the instrument electrical ground to minimize shock
hazard. The ground pin of the cord set plug must be firmly connected to the electrical ground (safety
ground) terminal at the power outlet. Any interruption of the protective earth (grounding) conductor
or disconnection of the protective earth terminal will cause a potential shock hazard that could result
in personal injury or death.
Keysight AC6800 Series Operating and Service Guide 3

General Warnings
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.
Instruments that appear damaged or defective should be made inoperative and secured against
unintended operation until they can be repaired by qualified service personnel.
The instrument contains an internal fuse, which is not user accessible.
DO NOT REMOVE COVERS. NO OPERATOR SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
SECURELY TURN OFF THE CIRCUIT BREAKER ON THE SWITCHBOARD BEFORE HANDLING THE
POWER CORDS. TO AVOID AN ELECTRIC SHOCK, THE PROTECTIVE CONDUCTOR TERMINAL MUST
BE CONNECTED TO AN ELECTRICAL GROUND.
NE PAS RETIRER LES COUVERTURE DE LA BOITE. AUCUN OPÉRATEUR SERVICEABLE PIÈCES À
L'INTÉRIEUR. CONFIER L'ENTRETIEN DE PERSONNEL QUALIFIÉ.
CORRECTEMENT COUPER LE DISJONCTEUR ARMOIRE AVANT DE MANIPULER LES CORDONS
D'ALIMENTATION. POUR ÉVITER TOUT CHOC ÉLECTRIQUE, LE CONDUCTEUR DE PROTECTION
BORNE DOIT ÊTRE RELIÉE À UNE MASSE ÉLECTRIQUE.
4 Keysight AC6800 Series Operating and Service Guide

Shock Hazard
When installing the switch between the OUTPUT terminal block and the load, be sure to turn the
POWER switch off and remove the power plug from an outlet or turn off the circuit breaker of
switchboard.
The current rating of the switch must be greater than or equal to the instrument's maximum current.
For the switch circuit, use a two-pole type switch that cuts off L and N wires simultaneously.
Be sure to turn the switch off before connecting the load to the terminal at the load end of the switch.
Do not touch the switch terminal when the output is on.
To prevent the possibility of electric shock, do not touch the output terminal block.
Do not remove the instrument covers. There are no customer-serviceable parts inside. Some circuits
are active and have power briefly after the power switch is turned off.
To prevent electric shock, unplug the unit before cleaning.
For protection from electrical shock, the power cord ground must not be defeated. If only a two-
contact electrical outlet is available, connect the instrument’s chassis ground screw (see above) to a
good earth ground.
This product is an IEC Safety Class I equipment (equipment with a protective conductor terminal). Be
sure to ground (earth) the unit.
Connect the protective conductor terminal to earth ground.
In DC mode, L is at positive potential and N is at negative potential when setting the positive value. The
opposite is true when setting the negative value.
Do not use the terminal block with the terminal cover removed.
Turn off the switchboard circuit breaker before connecting the cord.
This product includes protective earth terminals. To minimize shock hazard, 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.
If a capacitor, battery, or similar device is connected as a load in DC mode, voltage remains at the
section connected to the output terminal block even when the output is off until the load energy is
discharged. The discharge time of the internal capacitor when no load is connected is approximately
0.1 seconds. To prevent the possibility of electric shock, do not touch the output terminal block.
Keysight AC6800 Series Operating and Service Guide 5

Heavy Weight
Danger to hands and feet. To avoid personal injury and damage to the instrument, always use a sturdy
cart or other suitable device to move the instrument. Do not lift the instrument alone; always use two
people to lift the instrument.
Environmental Warnings
This product is designed for safe indoor use. Use indoors only.
Do not operate the instrument near flammable gases or fumes.
To prevent the possibility of explosion or fire, do not use the product near alcohol, thinner or other
combustible materials, or in an atmosphere containing such vapors.
Do not install the product near a heater, in direct sunlight, or in areas subject to drastic temperature
changes. The operating temperature range is 0 to 40 °C (32 to 104 °F), and the storage temperature
range is -10 to 60 °C (14 to 140 °F).
Do not install the product in high-humidity locations, such as near a boiler, humidifier, or water
supply. The operating humidity range is 20% to 80% relative humidity (no condensation), and the
storage humidity range is 90% relative humidity or less (no condensation). Condensation may occur
even within the operating humidity range. In such cases, do not use the instrument until the
condensation dries up completely.
Do not install the product in a corrosive atmosphere or in environments containing sulfuric acid mist,
etc. This may cause corrosion of various conductors and bad contacts of connectors inside the
instrument leading to malfunction and failure, or in the worst case, a fire.
Do not install the product in a dusty location. Accumulation of dust can lead to electric shock or fire.
6 Keysight AC6800 Series Operating and Service Guide

Installation Warnings
Have a qualified engineer connect the power cord to the switchboard.
Protective circuits inside the instrument, including input fuses, are connected to match the input
terminal polarity. Make sure the colors of the wires connected to the input terminals (L,N, andGND)
are correct.
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."
You cannot use standard rack mounting support rails, as they would block the airflow needed for
cooling.
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not
correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed
beyond a CAUTION notice until the indicated conditions are fully understood and met.
General Cautions
Do not place objects on the instrument. Placing objects, especially heavy objects, on top of the
product can cause failures.
Installation Cautions
Do not block the air intake at the front of the instrument or the exhaust at the rear.
Large voltage distortion on the AC power line can lead to malfunction. Do not connect the instrument
to a generator or a similar device.
Do not use the product in a location where strong magnetic or electric fields are nearby or a location
where large amounts of distortion or noise are present on the input power supply waveform. The
product may malfunction.
Do not install the product on an inclined surface or location subject to vibrations. The product may fall
or tip over, causing damage or injuries or both.
Keysight AC6800 Series Operating and Service Guide 7

Operational Cautions
You cannot set the voltage limit when the instrument is being controlled by external analog signals. An
excessive external voltage may damage the load.
When the output is turned on, several volts of undershoot or overshoot may appear for a time period
on the order of ten microseconds.
Moving Cautions
Be sure to include this manual when transporting the instrument.
Turn off the power switch before moving the instrument. Moving the product while the power is
turned on can cause electric shock or instrument damage.
Remove all wiring before moving the instrument. Moving the product with the cables connected can
cause wires to break or injuries due to the product falling over.
When transporting the product, be sure to use the original packing materials. Damage may result
from vibrations or from the product falling during transportation.
8 Keysight AC6800 Series Operating and Service Guide

Safety Symbols
Direct current
Alternating current
Frame or chassis terminal
Standby supply. Unit is not completely disconnected from AC mains when switch is off.
Caution, risk of electric shock
Caution, refer to accompanying documents
Earth ground terminal
The CE mark is a registered trademark of the European Community.
The TUV mark is a registered trademark of the European community.
The C-tick mark is a registered trademark of the Spectrum Management Agency of Australia.
This signifies compliance with the Australian EMC Framework regulations under the terms of
the Radio Communications Act of 1992.
South Korean Class A EMC Declaration
This equipment is Class A suitable for professional use and is for use in electromagnetic envir-
onments outside of the home.
Contains one or more of the 6 hazardous substances above the maximum concentration
value (MCV), 40 Year EPUP.
1SM1-A This text indicates that the instrument is an Industrial Scientific and Medical Group 1 Class A
product (CISPR 11, Clause 4).
ICES/NMB-001 This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme
NMB-001 du Canada.
Keysight AC6800 Series Operating and Service Guide 9

Software and Documentation Revisions
For the latest firmware revision go to the product page at www.keysight.com/find/AC6800.
You can download the latest version of this document from www.keysight.com/find/AC6800-doc . The latest
version is also available for mobile devices at www.keysight.com/find/AC6800-mobilehelp.
Technical Support
If you have questions about your shipment, or if you need information about warranty, service, or technical support,
contact Keysight Technologies.
Waste Electrical and Electronic Equipment (WEEE)
This product complies with the WEEE Directive) 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 your local Keysight office, or see
about.keysight.com/en/companyinfo/environment/takeback.shtml for more information.
10 Keysight AC6800 Series Operating and Service Guide

1 Getting Started
Before Installation or Use
Introduction to the Instrument
Installing an Optional Interface Board
Rack Mounting
Connecting the Power Cord
Switchboard and Circuit Breaker Requirements
Quick Start
Interface Connections
Remote Interface Configuration
Making Output Power Connections
Voltage Ranges and Limits
Error Checking and Soft Limits
Keysight AC6800 Series Operating and Service Guide 11

Before Installation or Use
Inspect the Unit
When you receive your instrument, inspect it for obvious shipping damage. If there is damage, notify the shipping
carrier and nearest Keysight Sales and Support Office immediately. Refer to www.keysight.com/find/assist. Save all
packing and shipping materials in case the unit must be returned or moved.
Check for Items Supplied
Verify that you received the following items.
– AC6800 Series AC Source
– Line cord (AC6801A only)
– AC input cover (AC6803A and AC6804A only)
– Ferrite core and cable tie
– CD - IO Libraries Media Suite
– Certificate Of calibration and envelope
Refer to the box contents list for any additional items that may be included with your shipment. If anything is
missing, please contact your nearest Keysight Sales and Support Office.
Review Safety Information
This AC source is a Safety Class 1 instrument, which means it has a protective earth terminal. That terminal must be
connected to earth ground through a power source equipped with an earth ground. Refer to the Safety Notices for
general safety information. Before installation or operation, check the instrument and review this guide for safety
warnings and instructions. Safety warnings for specific procedures are located at appropriate places throughout
this guide.
Observe Environmental Conditions
Do not operate the instrument near flammable gases or fumes.
The AC6800 Series instruments are Overvoltage Category II instruments that should only be operated in a
controlled, indoor environment subject to the following restrictions:
–Operating: 0 to 40 °C (32 to 104 °F), 20% to 80% relative humidity, noncondensing
–Storage: –10 to 60 °C (14 to 140 °F), 90% or less relative humidity, noncondensing
–Altitude: Up to 2000 m
12 Keysight AC6800 Series Operating and Service Guide

Provide Adequate Air Flow
Do not block the air intake at the front of the instrument or the exhaust at the rear.
The dimensions of each model are shown below. As the arrows indicate, fans cool the instrument by drawing air
through the front and exhausting it out the back. Allow at least 2 inches (51 mm) of space at the front and back of
the unit for air circulation.
All dimensions are in mm.
Keysight AC6800 Series Operating and Service Guide 13

All dimensions are in mm.
14 Keysight AC6800 Series Operating and Service Guide

Introduction to the Instrument
Front Panel at a Glance
Front Panel Display at a Glance
Rear Panel at a Glance
Front Panel at a Glance
The front panel is shown below.
The following table lists the main parts of the front panel, from left to right:
The [Power] switch turns the unit on or off. The indicator next to this switch shows the
display status. Green indicates normal operation. Yellow indicates that the display is in
screen saver mode or that the instrument is in the boot-up process. Press any key to
exit screen saver mode.
The status LEDs light to indicate when a protection event has occurred and when the
output is on.
The display allows you to configure and monitor the instrument.
Keysight AC6800 Series Operating and Service Guide 15

[Meter] returns the display to metering mode. Pressing it repeatedly cycles the display
through all three formats (METER_VI, METER_VIP, and METER_ALL).
[Menu] opens the top level of the command menu. Pressing it a second time returns to
the metering mode display.
[Protect] brings the user to the Protect menu. This is equivalent to [Menu]>Protect.
[Back] backs out of a menu without activating any changes.
[Help] describes the displayed menu control.
[Error] displays messages in the error queue.
The [Error] and [Help] keys provide access to text that is accessed via a
vertically scrolling text box. Use the up and down arrow keys to scroll
through multiline text, one screen at a time.
To retrieve error messages remotely, send the SYSTem:ERRor?
query. The SCPI Status Byte and Standard Event Registers provide an
overview of error conditions.
The puqt arrows move around the command menus and select characters in
alphanumeric entry fields. The [Select] key makes a selection in a menu and enters the
edit mode for numeric parameters.
[On/Off] enables or disables the output.
[Voltage] specifies the voltage settings.
[Freq] specifies the frequency settings.
[0] through [9] enter numbers.
[.] enters the decimal point.
[–] toggles between positive and negative numbers.
[!] and [#] increment or decrement voltage or frequency settings and select letters in
alphanumeric entry fields.
[E] enters the letter E to allow you to enter an exponent to the right of it.
[-] backspaces to delete characters.
[Enter] enters a value. If you exit a field without pressing [Enter], the value is ignored.
16 Keysight AC6800 Series Operating and Service Guide

Front Panel Display at a Glance
Metering field Shows the measured output.
Status field Displays the instrument status:
OFF = the output is off.
CV = the output is in constant voltage mode.
OC = the output is disabled by the overcurrent protection.
OT = the overtemperature protection has tripped.
OP = the overpower protection has tripped.
CLPK = the instrument has gone beyond its peak current limit.
CLrms = the instrument has gone beyond its RMS current limit.
PL = the instrument has gone beyond its power limit.
WDG = watchdog protection - no I/O activity.
Range field Displays the current voltage range (HIGH, LOW, or AUTO).
Settings field Displays the output settings.
Interface field Indicates the following remote interface activity:
Err = an error has occurred (press [Error] to display the error message)
Lan = the LAN is connected and has been configured
IO = there is activity on one of the remote interfaces
Keysight AC6800 Series Operating and Service Guide 17

Rear Panel at a Glance
The various rear panels are shown below.
For protection from electrical shock, the power cord ground must not be defeated. If only a two-
contact electrical outlet is available, connect the instrument’s chassis ground screw (see above) to a
good earth ground.
AC6801A
AC6802A
AC6803A
AC6804A
18 Keysight AC6800 Series Operating and Service Guide