Agilent Technologies U3606B User manual

Agilent Technologies
Agilent U3606B
Multimeter|DC Power
Supply
Service Guide

II U3606B Service Guide
Notices
© Agilent Technologies, Inc. 2013
No part of this manual may be reproduced in
any form or by any means (including elec-
tronic storage and retrieval or translation
into a foreign language) without prior agree-
ment and written consent from Agilent
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
U3606-90069
Edition
Second Edition, December 23, 2013
Agilent Technologies, Inc.
5301 Stevens Creek Blvd.
Santa Clara, CA 95051 USA
Warranty
The material contained in this document is
provided “as is,” and is subject to change,
without notice, in future editions. Further,
to the maximum extent permitted by the
applicable law, Agilent disclaims all war-
ranties, either express or implied, with
regard to this manual and any information
contained herein, including but not limited
to the implied warranties of merchantabil-
ity and fitness for a particular purpose.
Agilent shall not be liable for errors or for
incidental or consequential damages in
connection with the furnishing, use, or
performance of this document or of any
information contained herein. Should Agi-
lent and the user have a separate written
agreement with warranty terms covering
the material in this document that conflict
with these terms, the warranty terms in
the separate agreement shall control.
Technology Licenses
The hardware and or software described in
this document are furnished under a license
and may be used or copied only in accor-
dance with the terms of such license.
Restricted Rights Legend
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ware and technical data rights granted to
the federal government include only those
rights customarily provided to end user cus-
tomers. Agilent provides this customary
commercial license in Software and techni-
cal data pursuant to FAR 12.211 (Technical
Data) and 12.212 (Computer Software) and,
for the Department of Defense, DFARS
252.227-7015 (Technical Data - Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Com-
puter Software Documentation).
Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the likes
of that, if not correctly performed
or adhered to, could result in dam-
age to the product or loss of impor-
tant data. Do not proceed 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 procedure, practice, or
the likes of that, if not correctly
performed or adhered to, could
result in personal injury or death.
Do not proceed beyond a WARN-
ING notice until the indicated
conditions are fully understood
and met.

U3606B Service Guide III
Safety Symbols
The following symbols on the instrument and in the documentation
indicate precautions which must be taken to maintain safe operation of
the instrument.
Direct current (DC) Off (supply)
Alternating current (AC) On (supply)
Both direct and alternating current Caution, risk of danger (refer to this manual
for specific Warning or Caution information)
Earth (ground) terminal Out position of a bi-stable push control
Frame or chassis terminal In position of a bi-stable push control
Category II 300 V over voltage protection
CAT II
300 V

IV U3606B 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. Agilent Technologies assumes no liability for the
customer’s failure to comply with these requirements.
WARNING
• Do not use the device if it is damaged. Before you use the device,
inspect the casing. Look for cracks or missing plastic. Do not
operate the device around explosive gas, vapor, or dust.
• Always use the device with the cables provided.
• Observe all markings on the device before establishing any
connection.
• Turn off the device and application system power before
connecting to the I/O terminals.
• When servicing the device, use only the specified replacement
parts.
• Do not operate the device with the cover removed or loosened.
• Use only the power adapter provided by the manufacturer to avoid
any unexpected hazards.
CAUTION
•If the device is used in a manner not specified by the manufacturer,
the device protection may be impaired.
•Always use dry cloth to clean the device. Do not use ethyl alcohol or
any other volatile liquid to clean the device.
•Do not permit any blockage of the ventilation holes of the device.

U3606B Service Guide V
Environmental Conditions
This instrument 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)
• Storage condition
• Up to 95% RH at 40 °C (non-condensing)
Altitude Up to 2000 m
Pollution degree 2
NOTE
The U3606B complies with the following safety and EMC compliances:
Safety compliance
•IEC 61010-1:2001/EN 61010-1:2001 (2nd Edition)
•Canada: CAN/CSA-C22.2 No. 61010-1-04
•USA: ANSI/UL 61010-1:2004
EMC compliance
•IEC 61326-1:2005/EN61326-1:2006
•CISPR11:2003/EN55011:2007, Group 1 Class A
•Canada: ICES/NMB-001:Issue 4, June 2006
•Australia/New Zealand: AS/NZS CISPR 11:2004

VI U3606B Service Guide
Regulatory Markings
The CE mark is a registered trademark
of the European Community. This CE
mark shows that the product complies
with all the relevant European Legal
Directives.
The C-tick mark is a registered
trademark of the Spectrum
Management Agency of Australia. This
signifies compliance with
the Australia EMC Framework
regulations under the terms of the
Radio Communication Act of 1992.
ICES/NMB-001 indicates that this ISM
device complies with the Canadian
ICES-001.
Cet appareil ISM est confomre a la
norme NMB-001 du Canada.
This instrument complies with the
WEEE Directive (2002/96/EC) marking
requirement. This affixed product label
indicates that you must not discard
this electrical or electronic product in
domestic household waste.
The CSA mark is a registered
trademark of the Canadian Standards
Association.
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.

U3606B Service Guide VII
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard
this electrical or electronic product in domestic household waste.
Product Category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Agilent Service
Center, or visit
www.agilent.com/environment/product
for more information.

VIII U3606B Service Guide
Declaration of Conformity (DoC)
The Declaration of Conformity (DoC) for this instrument is available on the
Agilent website. You can search the DoC by its product model or
description at the web address below.
http://regulations.corporate.agilent.com/DoC/search.htm
NOTE
If you are unable to search for the respective DoC, please contact your
local Agilent representative.

U3606B Service Guide IX
Table of Contents
1 Calibration Procedures
Calibration Overview 19
Closed-case calibration 19
Agilent calibration services 19
Calibration interval 20
Adjustment is recommended 20
Time required for calibration 20
Recommended Test Equipment 21
General measurement techniques 24
Using an electronic load 24
Connecting the current monitoring resistor 24
Test Considerations 25
Input and Output Connections 26
Zero Offset (Short) Verification Test Setup 27
Gain Verification Test Setup 28
Output Verification Test Setup 34
Performance Verification Tests Overview 38
Self-Tests 39
Performance Verification Tests 40
Zero offset verification test 40
Gain verification test 42
Output verification test 50
Additional Verification Tests 65
Optional capacitance gain verification test 65
Calibration Process 67
Calibration Security 68

XU3606B Service Guide
Unsecuring the Instrument for Calibration 69
Unsecuring the instrument from the front panel 69
Unsecuring the instrument from the remote interface 71
Changing the calibration security code 71
Resetting the security code to the factory default 72
Using the Front Panel for Adjustments 75
Adjustment Considerations 75
Aborting a Calibration in Progress 75
Adjustments Procedures 76
Zero offset adjustment 76
Gain adjustments 78
Output adjustments 90
Finishing the adjustments 100
Calibration Count 101
Calibration Message 102
Calibration Error Codes 103
2 Service and Maintenance
Operating Checklist 106
Cleaning 107
Fuse Replacement 108
To replace the power line fuse 108
To replace the current input fuse 110
Electrostatic Discharge (ESD) Precautions 112
Mechanical Disassembly 113
General disassembly 113
Replaceable Parts 120
To order replaceable parts 121

U3606B Service Guide XI
Types of Services Available 122
Repackaging for Shipment 123

XII U3606B Service Guide

U3606B Service Guide XIII
List of Figures
Figure 1-1 Test setup for zero offset (short) verification 27
Figure 1-2 Test setup for DC voltage and AC voltage gain
verification 28
Figure 1-3 Test setup for capacitance gain verification 29
Figure 1-4 Test setup for 2-wire resistance gain verification 30
Figure 1-5 Test setup for 4-wire resistance gain verification 31
Figure 1-6 Test setup for DC current and AC current gain
verification 31
Figure 1-7 Test setup for frequency voltage gain verification 32
Figure 1-8 Test setup for frequency current gain verification 32
Figure 1-9 Test setup for diode voltage gain verification 33
Figure 1-10 Test setup for constant voltage programming and
readback accuracy verification 34
Figure 1-11 Test setup for constant voltage load and line regulation
verification 34
Figure 1-12 Test setup for constant voltage noise effect
(peak-to-peak and RMS noise) verification 35
Figure 1-13 Test setup for load transient response time
verification 35
Figure 1-14 Test setup for constant current programming and
readback accuracy verification 36
Figure 1-15 Test setup for constant current load and line regulation
verification 36
Figure 1-16 Test setup for constant current RMS noise effect
verification 37
Figure 1-17 Graph of load transient response time for S1 range 58
Figure 1-18 SECUR pads location 73

XIV U3606B Service Guide

U3606B Service Guide XV
List of Tables
Ta b l e 1 - 1 Recommended test equipment 21
Ta b l e 1 - 2 Zero offset verification test 41
Ta b l e 1 - 3 DC voltage gain verification test 43
Ta b l e 1 - 4 DC current gain verification test 44
Ta b l e 1 - 5 AC voltage gain verification test 45
Ta b l e 1 - 6 AC current gain verification test 46
Ta b l e 1 - 7 2-wire resistance gain verification test 46
Ta b l e 1 - 8 4-wire resistance gain verification test 47
Ta b l e 1 - 9 Frequency voltage gain verification test 48
Ta b l e 1 - 1 0 Frequency current gain verification test 48
Ta b l e 1 - 1 1 Diode voltage gain verification test 49
Ta b l e 1 - 1 2 Constant voltage programming and readback accuracy
verification test 50
Ta b l e 1 - 1 3 Constant voltage load effect (load regulation) verification
test 52
Ta b l e 1 - 1 4 Constant voltage source effect (line regulation)
verification test 53
Ta b l e 1 - 1 5 Constant voltage peak -to-peak noise verification
test 55
Ta b l e 1 - 1 6 Constant voltage RMS noise verification test 56
Ta b l e 1 - 1 7 Transient response time 57
Ta b l e 1 - 1 8 Constant current programming and readback accuracy
verification test 59
Ta b l e 1 - 1 9 Constant current load regulation (load effect) verification
test 60
Ta b l e 1 - 2 0 Constant current source effect (line regulation)
verification test 62
Ta b l e 1 - 2 1 Constant current RMS noise verification test 64
Ta b l e 1 - 2 2 Optional capacitance gain verification test 66
Ta b l e 1 - 2 3 Valid gain adjustment input values 79
Ta b l e 1 - 2 4 DC voltage gain adjustment 81
Ta b l e 1 - 2 5 AC voltage gain adjustment 83
Ta b l e 1 - 2 6 Frequency gain adjustment 84
Ta b l e 1 - 2 7 Resistance gain adjustment 85
Ta b l e 1 - 2 8 DC current gain adjustment 87

XVI U3606B Service Guide
Ta b l e 1 - 2 9 AC current gain adjustment 88
Ta b l e 1 - 3 0 Capacitance gain adjustment 89
Ta b l e 1 - 3 1 Valid output adjustment levels 91
Ta b l e 1 - 3 2 Constant current output adjustment 93
Ta b l e 1 - 3 3 Constant voltage output adjustment 96
Ta b l e 1 - 3 4 List of calibration errors 103
Ta b l e 2 - 1 List of replaceable parts 120

17
U3606B Multimeter|DC Power Supply
Service Guide
Agilent Technologies
1
Calibration Procedures
Calibration Overview 19
Closed-case calibration 19
Agilent calibration services 19
Calibration interval 20
Adjustment is recommended 20
Time required for calibration 20
Recommended Test Equipment 21
General measurement techniques 24
Using an electronic load 24
Connecting the current monitoring resistor 24
Test Considerations 25
Input and Output Connections 26
Zero Offset (Short) Verification Test Setup 27
Gain Verification Test Setup 28
Output Verification Test Setup 34
Performance Verification Test s O ver v iew 38
Self-Tests 39
Performance Verification Tests 40
Zero offset verification test 40
Gain verification test 42
Output verification test 50
Additional Verification Tests 65
Optional capacitance gain verification test 65
Calibration Process 67
Calibration Security 68
Unsecuring the Instrument for Calibration 69
Unsecuring the instrument from the front panel 69
Unsecuring the instrument from the remote interface 71
Changing the calibration security code 71
Resetting the security code to the factory default 72

1 Calibration Procedures
18 U3606B Service Guide
Using the Front Panel for Adjustments 75
Adjustment Considerations 75
Aborting a Calibration in Progress 75
Adjustments Procedures 76
Zero offset adjustment 76
Gain adjustments 78
Output adjustments 90
Finishing the adjustments 100
Calibration Count 101
Calibration Message 102
Calibration Error Codes 103
This chapter helps you to verify the instrument performance
and to make adjustments where necessary.

Calibration Procedures 1
Calibration Overview
U3606B Service Guide 19
Calibration Overview
This manual contains procedures to verify the performance
of the U3606B and to perform adjustments (calibration)
where necessary.
•The performance verification tests allow you to verify that
the instrument is operating within its published
specifications.
•The adjustment procedures ensure that the instrument
remains within its specifications until the next calibration.
Closed-case calibration
The instrument features closed- case electronic calibration. In
other words, no internal mechanical adjustments are
required. The instrument calculates correction factors based
upon the input reference value you set. The new correction
factors are stored in the nonvolatile memory until the next
calibration adjustment is performed. The nonvolatile
EEPROM calibration memory is retained even when the
power is switched off, after a Factory Reset (*RST
command), or after an Instrument Preset (SYSTem:PRESet
command).
Agilent calibration services
When your instrument is due for calibration, contact your
local Agilent Service Center to enquire about recalibration
services.
NOTE
Ensure that you have read the “Test Considerations” on page 25 before
calibrating the instrument.

1 Calibration Procedures
Calibration Overview
20 U3606B Service Guide
Calibration interval
The multimeter should be calibrated on a regular interval
determined by the measurement accuracy requirements of
your application.
A 1- year interval is recommended for the most demanding
applications, while a 2- year interval may be adequate for
less demanding applications. Agilent does not recommend
extending calibration intervals beyond 2 years for any
application.
Adjustment is recommended
Specifications are only guaranteed within the period stated
from the last adjustment. Agilent recommends that
re- adjustment should be performed during the calibration
process for best performance. This will ensure that the
instrument will remain within the specifications for the next
calibration interval.
This criterion for the re- adjustment provides the best
long- term stability. Performance data are measured during
the “Calibration Security” but this does not guarantee that
the instrument will remain within these limits unless the
adjustments are performed.
Refer to the “Calibration Count” on page 101 and verify that
all the adjustments have been performed.
Time required for calibration
The instrument can be automatically calibrated under
computer control. With computer control you can perform
the complete calibration procedure and performance
verification tests once the instrument is warmed- up (see
“Test Considerations” on page 25).