Keysight Technologies DAQ970A User manual

Keysight DAQ970A/DAQ973A
Data Acquisition System
Service Guide

2 Keysight DAQ970A/DAQ973A Service Guide
Notices
Copyright Notice
© Keysight Technologies 2019
No part of this manual may be repro-
duced in any form or by any means
(including electronic storage and
retrieval or translation into a foreign
language) without prior agreement and
written consent from Keysight Technol-
ogies as governed by United States and
international copyright laws.
Manual Part Number
DAQ97-90001
Edition
Edition 2, September 1, 2019
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
Technology Licenses
The hardware and/or software
described in this document are fur-
nished under a license and may be
used or copied only in accordance with
the terms of such license.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight prod-
ucts may be downloaded from the
Web. Go to http://www.keysight.com/
go/conformity. You can then search by
product number to find the latest Dec-
laration of Conformity.
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal Acqui-
sition Regulation (“FAR”) 2.101. Pursu-
ant to FAR 12.212 and 27.405-3 and
Department of Defense FAR Supple-
ment (“DFARS”) 227.7202, the U.S.
government acquires commercial com-
puter 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 stan-
dard 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 Soft-
ware. The EULA and the license set
forth therein, does not require or per-
mit, among other things, that Keysight:
(1) Furnish technical information
related to commercial computer soft-
ware or commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish
to, or otherwise provide, the govern-
ment rights in excess of these rights
customarily provided to the public to
use, modify, reproduce, release, per-
form, display, or disclose commercial
computer software or commercial com-
puter 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 pursu-
ant to the FAR and the DFARS and are
set forth specifically in writing else-
where in the EULA. Keysight shall be
under no obligation to update, revise or
otherwise modify the Software. With
respect to any technical data as
defined by FAR 2.101, pursuant to FAR
12.211 and 27.404.2 and DFARS
227.7102, the U.S. government
acquires no greater than Limited Rights
as defined in FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any
technical data.
Warranty
THE MATERIAL CONTAINED IN THIS
DOCUMENT IS PROVIDED “AS IS,”
AND IS SUBJECT TO BEING
CHANGED, WITHOUT NOTICE, IN
FUTURE EDITIONS. FURTHER, TO THE
MAXIMUM EXTENT PERMITTED BY
APPLICABLE LAW, KEYSIGHT DIS-
CLAIMS ALL WARRANTIES, EITHER
EXPRESS OR IMPLIED, WITH REGARD
TO THIS MANUAL AND ANY INFORMA-
TION CONTAINED HEREIN, INCLUD-
ING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSE-
QUENTIAL DAMAGES IN CONNECTION
WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT
OR OF ANY INFORMATION CON-
TAINED HEREIN. SHOULD KEYSIGHT
AND THE USER HAVE A SEPARATE
WRITTEN AGREEMENT WITH WAR-
RANTY TERMS COVERING THE MATE-
RIAL IN THIS DOCUMENT THAT
CONFLICT WITH THESE TERMS, THE
WARRANTY TERMS IN THE SEPARATE
AGREEMENT SHALL CONTROL.
Safety Information
CAUTION
A CAUTION notice denotes a hazard. It
calls attention to an operating proce-
dure, 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 pro-
ceed beyond a CAUTION notice until
the indicated conditions are fully
understood and met.
WARNING
A WARNING notice denotes a hazard. It
calls attention to an operating proce-
dure, 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.

Keysight DAQ970A/DAQ973A Service Guide 3
Software Revision
The latest firmware is available at:
– www.keysight.com/find/DAQ970Afirmware
A portion of the software in this product is licensed under terms of the General
Public License Version 2 (GPLv2). The text of the license and source code can be
found at www.keysight.com/find/GPLV2.
This product uses Microsoft Windows CE. Keysight highly recommends that all
Windows-based computers connected to Windows CE instruments use current
anti-virus software. For more information, go to the respective product page at:
– www.keysight.com/find/DAQ970A
– www.keysight.com/find/DAQ973A

4 Keysight DAQ970A/DAQ973A Service Guide
Safety Considerations
Read the information below before using this instrument.
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety
standards for design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer’s failure to comply with these
requirements.
WARNING BEFORE APPLYING POWER
Verify that all safety precautions are taken. Make all connections to the unit
before applying power.
WARNING GROUND THE INSTRUMENT
This product is provided with 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 family connected to an
electrical ground (safety ground) at the protective (grounding) conductor.
Disconnection of the protective earth terminal will cause a potential shock
hazard that could result in personal injury.
WARNING BEFORE POWER ON AND OFF
Before powering on the instrument, make sure all signal sources connected
to modules are turned off. Turn on signal sources after the instrument is
powered on. Turn off signal sources before the instrument is powered off.
WARNING DO NOT REMOVE THE INSTRUMENT COVER
Only qualified, service-trained personnel who are aware of the hazards
involved should remove the instrument covers. Always disconnect the
power cable and any external circuits before removing the instrument cover.

Keysight DAQ970A/DAQ973A Service Guide 5
WARNING MODULE COVERS
Always reinstall module covers after terminal wiring and before inserting
into mainframe.
WARNING DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
WARNING 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.
WARNING DO NOT MEASURE MORE THAN THE RATED VOLTAGE
Maximum voltage as marked on each module is as below:
– DAQM900A: 120 Vrms
– DAQM901A, DAQM902A, DAQM903A, DAQM904A, DAQM908A: 300 Vrms
– DAQM905A, DAQM907A: 42 Vpk
– DAQM909A: +/-18Vpk (single ended) for both HI and LO pins.
WARNING DO NOT CONNECT ANY MODULE CHANNELS TO MAINS
Measurement category of the instrument is rated as CAT 'Others', terminals
should not be directly connected to the mains.

6 Keysight DAQ970A/DAQ973A Service Guide
WARNING AC POWER CORD
Removal of the AC power cord is the disconnect method to remove power
from the instrument. Be sure to allow for adequate access to the power cord
to permit disconnection from AC power. Use only the Keysight specified
power cord for the country of use or one with equivalent ratings.
WARNING SELF-TEST
Before measuring any hazardous voltage or current, run the *TST? query
from the remote interface, and read the result to verify that the instrument is
performing properly. The *TST? query is a self-test that returns +0 if the
instrument passes and +1 if the instrument fails. You can also perform this
query from the front panel by pressing [Utility] > Self Test > Quick Test. If
this self-test fails, make sure that the instrument is repaired and passes the
self-test before continuing.
WARNING 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.
CAUTION MEASUREMENT CONSIDERATIONS
This is a sensitive measurement apparatus by design and may have some
performance loss when exposed to ambient continuous electromagnetic
phenomenon. Consider using shielded or twisted cables, common mode
chokes, ferrite clamps, and damping resistors before the input to the
DAQ970A/DAQ973A.

Keysight DAQ970A/DAQ973A Service Guide 7
CAUTION CLEANING
To prevent electrical shock, disconnect the instrument from AC mains power
before cleaning. Clean the outside of the instrument using a soft, lint-free,
cloth slightly dampened with water. Do not use detergent or solvents. Do
not attempt to clean internally. If needed, contact a Keysight Technologies
Sales and Service Office to arrange for proper cleaning to ensure that safety
features and performance are maintained.

8 Keysight DAQ970A/DAQ973A Service Guide
Environmental Conditions
The DAQ970A/DAQ973A is designed for indoor use and in an area with low
condensation. The table below shows the general environmental requirements for
this instrument.
Environmental condition Requirement
Temperature
Operating condition
– 0 °C to 55 °C
Storage condition
– –40 °C to 70 °C
Humidity
Operating condition
– Up to 80% RH at 40°C (non-condensing), decreasing
linearly to 50% RH at 55 °C (non-condensing)
Storage condition
– Up to 50% RH at 55°C (non-condensing)
Altitude Operating condition
– Up to 3,000 m (9,840 ft.)
Pollution degree 2

Keysight DAQ970A/DAQ973A Service Guide 9
Regulatory Information
This instrument is designed to comply with the following safety and EMC
requirements:
Safety compliance:
– IEC 61010-1:2010/EN 61010-1:2010; IEC 61010-2-030:2010/
EN61010-2-030:2010
– Canada: CAN/CSA-C22.2 No.61010-1-12; CAN/CSA-C22.2 No.
61010-2-030-12
– USA: ANSI/UL Std. No. 61010-1:2012; ANSI/UL Std No.61010-2-030:2012
EMC compliance:
– IEC 61326-1:2012 / EN 61326-1:2013
– Canada: ICES/NMB-001:2006
– Australia/New Zealand: AS/NZS CISPR 11:2011
– South Korea RRA Notice 2016-24

10 Keysight DAQ970A/DAQ973A Service Guide
Safety Symbols and Regulatory Markings
Alternating current (AC) Protective earth (ground) terminal
Earth (ground) terminal
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Frame or chassis (ground) terminal Instrument cable lock.
This product is marked with the ACMA
RCM mark for compliance in Australia/
New Zealand. A copy of the
Manufacturer's Australia Declaration of
Conformity for this instrument can be
obtained by contacting your local
Keysight Technologies Sales
Representative.
This symbol indicates the time period
during which no hazardous or toxic
substance elements are expected to
leak or deteriorate during normal use.
Forty years is the expected useful life
of the product.

Keysight DAQ970A/DAQ973A Service Guide 11
South Korean Class A EMC Declaration
Information to the user:
This instrument has been conformity assessed for used in business environments.
In a residential environment this equipment may caused radio interference.
This EMC statement applies to the equipment only for use in business
environment.
یࡈ࢕ ߇ΰחࡵ "߶הࡈ ؏ܞݦ࢕ࢢ "߾փ ࢶࡈଞЬ .
The CE mark is a registered trademark
of the European Community. This CE
mark shows that the product complies
with all the relevant European Legal
Directives.
ICES/NMB-001 - This ISM device
complies with the Canadian ICES-001.
Cet appareil ISM est conforme a la
norme NMB-001 du Canada.
ISM GRP 1-A - This is an Industrial
Scientific and Medical (ISM) Group 1
Class A product.
The CSA mark is a registered
trademark of the Canadian Standards
Association, with the 'C' and 'US'
subscript indicates the instrument is
certified to the applicable Canadian
and United States of America
standards respectively.
This symbol is a South Korean Class A EMC Declaration, with the product identification code
“R-REM-Kst-GM16412”.
R- Identification of authorization prefix
REM - Identification of basic certification information.
Kst - Identification of applicant's information
GM16412 - Product identification.
This is a Class A instrument suitable for professional use and in electromagnetic environment outside of
the home.
ۉࡅ࢒߄έה
ࢇЕ߶הࡈ୚ˁ߾۰یࡈଟּࢶࡳԻࢶଢ۽ૡɼձ؇ࡵԻ۰ɼࢽ
ࡈ୚ˁ߾۰یࡈଜЕˁࡉࢷળɾۺࢂࡉԮɼ࢑ݡТЬ.

12 Keysight DAQ970A/DAQ973A Service Guide
Waste Electrical and Electronic Equipment (WEEE) Directive
This instrument complies with the WEEE Directive marking requirement. This
affixed product label indicates that you must not discard this electrical or
electronic product in domestic household waste.
Product category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
–www.keysight.com/find/DAQ970A or www.keysight.com/find/DAQ973A
(product-specific information and support, software and
documentation updates)
–www.keysight.com/find/assist
(worldwide contact information for repair and service)

Keysight DAQ970A/DAQ973A Service Guide 13
Table of Contents
Software Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Safety Symbols and Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . .10
South Korean Class A EMC Declaration . . . . . . . . . . . . . . . . . . . . . . . . .11
Waste Electrical and Electronic Equipment (WEEE) Directive . . . . . . .12
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1 Service and Repair
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Types of service available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Keysight unit exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Repackaging for shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Electrostatic discharge (ESD) precautions . . . . . . . . . . . . . . . . . . . .19
User replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Specifications and characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Operating checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
General troubleshooting hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Self-test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Power-on self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Full self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Plug-in module self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Self-test duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Battery Check and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
To verify or replace the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

14 Keysight DAQ970A/DAQ973A Service Guide
General disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Internal DMM disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Front panel disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Additional chassis disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2 Calibration Procedures
Keysight Technologies Calibration Service . . . . . . . . . . . . . . . . . . . . . . 34
Calibration Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Adjustment is recommended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Time Required for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Automating Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Short (Zero) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Input test signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Calibration Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
To unsecure for calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
To secure against calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
To change the security code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
To unsecure the instrument without the security code . . . . . . . . . . 42
Calibration Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Calibration Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Recommended Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Aborting a Calibration in Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Calibration Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Entering calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Storing calibration constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Test Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Calibrator setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Channel delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Channel monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Calibration Adjustment Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Keysight DAQ970A/DAQ973A Service Guide 15
Internal DMM Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Zero Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Zero and ADC calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
AC zero calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Capacitance zero calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Gain Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Gain and flatness adjustment considerations . . . . . . . . . . . . . . . . . .55
Valid gain adjustment input values . . . . . . . . . . . . . . . . . . . . . . . . . .56
AC voltage low frequency gain and flatness calibration . . . . . . . . . .56
AC voltage gain and flatness calibration . . . . . . . . . . . . . . . . . . . . . .57
AC current gain and flatness calibration . . . . . . . . . . . . . . . . . . . . . .58
Frequency accuracy calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
DC voltage gain calibration (10 V) . . . . . . . . . . . . . . . . . . . . . . . . .60
Ohms gain calibration (2-wire and 4-wire) . . . . . . . . . . . . . . . . . . . .61
DC current gain calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
DC high voltage gain calibration (100 V) . . . . . . . . . . . . . . . . . . . .63
3 Performance Verification
Quick Performance Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Internal DMM Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Zero Offset Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Gain Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Plug-in Module Test Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Relay Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
DAQM900A solid state relay on-resistance verification (optional) . .78
DAQM901A relay contact resistance verification (optional) . . . . . . .79
DAQM901A shorted relay contact verification . . . . . . . . . . . . . . . . .81
DAQM902A relay contact resistance verification (optional) . . . . . . .82
DAQM902A shorted relay contact verification . . . . . . . . . . . . . . . . .83
DAQM903A relay contact resistance verification (optional) . . . . . . .83
DAQM903A shorted relay contact verification . . . . . . . . . . . . . . . . .84
DAQM904A relay contact resistance verification (optional) . . . . . . .85
DAQM904A shorted relay contact verification . . . . . . . . . . . . . . . . .88

16 Keysight DAQ970A/DAQ973A Service Guide
DAQM905A relay verification (optional) . . . . . . . . . . . . . . . . . . . . . . 89
DAQM908A relay contact resistance verification (optional) . . . . . . . 90
DAQM908A shorted relay contact verification . . . . . . . . . . . . . . . . . 90
DAQM907A Analog Output Verification (Optional) . . . . . . . . . . . . . . . . 92
DAQM907A Analog Sense Inputs Verification (Optional) . . . . . . . . . . . 93
Thermocouple Reference Junction Verification (Optional) . . . . . . . . . . 94
DAQM909A DC/AC Coupling Verification (Optional) . . . . . . . . . . . . . . 95

Keysight DAQ970A/DAQ973A Data Acquisition System
Service Guide
17
1 Service and Repair
General Information 18
Troubleshooting 21
Self-test Procedures 23
Battery Check and Replacement 26
Disassembly 28
This chapter discusses the procedures involved for returning a failed instrument to
Keysight Technologies for service or repair.

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18 Keysight DAQ970A/DAQ973A Service Guide
General Information
Types of service available
If your instrument or plug-in module fails during the warranty period, Keysight
Technologies will replace the unit free of charge. After your warranty expires,
Keysight Technologies will replace the unit at a competitive price. The
replacement units are fully refurbished and are shipped with new calibration
certificates.
Keysight unit exchange
You can contact Keysight Technologies for unit exchange, warranty, service, or
technical support.
– In the United States: [phone]
– In Europe: 31 20 547 2111
– In Japan: 0120-421-345
Use www.keysight.com/find/assist to contact Keysight worldwide, or contact your
Keysight Technologies representative.
The Keysight Unit Exchange applies to the DAQ970A/DAQ973A mainframe only.
Plug-in modules are not supported as exchange assemblies. When exchanging
the DAQ970A/DAQ973A, do not ship the plug-in modules with your instrument.
Remove all plug-in modules and customer wiring before shipping the unit to
Keysight.
NOTE Each replacement unit has its own serial number. The serial number of the
defective unit does not transfer to the replacement unit. The warranty period of
the replacement unit is based on the remaining warranty of the defective
instrument or plug-in module.
NOTE The defective unit must be returned to Keysight before the replacement unit is
shipped to you. Additional information regarding unit exchange will be provided
when you contact Keysight.

Service and Repair 1
Keysight DAQ970A/DAQ973A Service Guide 19
Repackaging for shipment
If the unit is to be shipped to Keysight Technologies for service or repair, be sure
to:
– Attach a tag to the unit identifying the owner and indicating the required
service or repair.
– Include the instrument model number and your full serial number.
– Place the unit in its original container with appropriate packaging material.
– Secure the container with strong tape or metal bands.
If the original shipping container is not available, place your unit in a container
which will ensure at least 4 inches of compressible packaging material around all
sides for the instrument. Use static-free packaging materials to avoid additional
damage to your unit.
Keysight Technologies suggests that you always insure shipments.
Cleaning
Unplug the instrument before cleaning it. Clean the outside of the instrument and
plug-in modules with a soft, lint-free, slightly dampened cloth. Do not use
detergent. Disassembly is not required or recommended for cleaning.
Electrostatic discharge (ESD) precautions
Almost all electrical components can be damaged by electrostatic discharge
(ESD) during handling. Component damage can occur at electrostatic discharge
voltages as low as 50 volts.
The following guidelines will help prevent ESD damage when servicing the
instrument or any electronic device.
– Disassemble instruments only in a static-free work area.
– Use a conductive work area to dissipate static charge.
– Use a conductive wrist strap to dissipate static charge accumulation.
– Minimize handling.
– Keep replacement parts in original static-free packaging.

1 Service and Repair
20 Keysight DAQ970A/DAQ973A Service Guide
– Remove all plastic, styrofoam, vinyl, paper, and other static-generating
materials from the immediate work area.
– Use only anti-static solder suckers.
User replaceable parts
You can find the instrument support part list at Keysight's Test & Measurement
Parts Catalog at http://www.keysight.com/find/parts.
Specifications and characteristics
For the specifications and characteristics on the mainframe and plug-in modules,
refer to the data sheet at http://literature.cdn.keysight.com/litweb/pdf/
5992-3168EN.pdf.
WARNING SHOCK HAZARD. Only service-trained personnel who are aware of the
hazards involved should remove the instrument covers. To avoid electrical
shock and personal injury, make sure to disconnect the power cord from the
instrument before removing the covers.