Keysight U2722A/U2723A USB Modular Source Measure Units

Keysight U2722A/U2723A USB Modular Source Measure Units
Keysight U2722A/U2723A
USB Modular Source
Measure Units
Service
Guide
Notices
® Keysight Technologies 2009 - 2014
Warranty
No part of this manual may be reproduced in
any form or by any means (including electronic storage and retrieval or translation
into a foreign language) without prior agreement and written consent from Keysight
Technologies as governed by United States
and international copyright laws.
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 of
any information contained herein.
Should Keysight and the user have a
separate written agreement with
warranty terms covering the material
in this document that conflict with
these terms, the warranty terms in the
separate agreement shall control.
Manual Part Number
U2722-90021
Edition
Edition 6, November 2014
Keysight Technologies
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Trademark Acknowledgements
Windows and MS Windows are U.S. registered trademarks of Microsoft Corporation.
Technology Licenses
The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in accordance with the terms of such license.
Restricted Rights Legend
U.S. Government Restricted Rights. Software and technical data rights granted to
the federal government include only those
rights customarily provided to end user customers. Keysight provides this customary
commercial license in Software and technical data pursuant to FAR 12.211 (Technical
Data) and 12.212 (Computer Software) and,
for the Department of Defense, DFARS
252.227-7015 (Technical Data - Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Computer Software Documentation).
II
Safety Notices
CAUTION
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.
WA R N I N G
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.
U2722A/U2723A Service Guide
Safety Symbols
The following symbols on the instrument and in the documentation
indicate precautions which must be taken to maintain safe operation of
the instrument.
Direct current (DC)
Equipment protected throughout by
double insulation or reinforced
insulation
Alternating current (AC)
Off (supply)
Both direct and alternating current
On (supply)
Three-phase alternating current
Caution, risk of electric shock
Earth (ground) terminal
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Protective conductor terminal
Caution, hot surface
Frame or chassis terminal
Out position of a bi-stable push control
Equipotentiality
In position of a bi-stable push control
U2722A/U2723A Service Guide
III
General Safety Information
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 of design, manufacture, and intended
use of the instrument. Keysight Technologies assumes no liability for the
customer's failure to comply with these requirements.
IV
WA R N I N G
• 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.
• Do not operate the product in an explosive atmosphere or in the presence of flammable gases or fumes.
• Only qualified, service-trained personnel who are aware of the hazards involved should remove the instrument casing. Always disconnect the power cable and any external circuits before removing the
instrument casing.
• Do not use the equipment if it does not operate properly. Ensure that
the equipment is inspected by qualified service personnel.
• Do not install substitute parts or perform any unauthorized modification to the product. Return the product to n Keysight Sales and Service Office for service and repair to ensure that the safety features are
maintained.
CAUTION
• Make all connections to the unit before applying power.
• Take note of the instrument's external markings described under Safety
Symbols.
• Use the device with the provided cables.
• Repair or service that is not covered in this manual should only be performed by qualified personnel.
• Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be
repaired by qualified service personnel.
U2722A/U2723A Service Guide
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.
CAUTION
Requirements
Operating temperature
0 °C to 50 °C
Operating humidity
20% to 85% RH non-condensing
Storage temperature
–20 °C to 70 °C
Storage humidity
5% to 90% RH non-condensing
The U2722A/U2723A USB Modular Source Measure Units complies with
the following safety and EMC requirements.
•
•
•
•
•
•
U2722A/U2723A Service Guide
Environmental conditions
IEC 61326-1:2005/EN61326-1:2006
Canada: ICES-001:2004
Australia/New Zealand: AS/NZS CISPR11:2004
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
V
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/electronic product
in domestic household waste.
The CSA mark is a registered
trademark of the Canadian Standards
Association.
VI
U2722A/U2723A Service Guide
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”.
The affixed product label is shown as below.
Do not dispose in domestic household waste
To return this unwanted instrument, contact your nearest Keysight
Technologies, or visit:
www.keysight.com/environment/product
for more information.
U2722A/U2723A Service Guide
VII
In This Guide…
1
Specifications
This chapter covers the characteristics and specifications of the
U2722A/U2723A USB Modular Source Measure Units.
2
Getting Started
This chapter provides an overview of the service procedure for the
U2722A/U2723A which includes the service types offered by Keysight,
and instructions for obtaining services and sending the U2722A/U2723A
for service.
3
Performance Verification and Adjustment
This chapter describes the calibration procedures for the U2722A/U2723A
to ensure that the instrument is operating normally within the warranted
specifications.
VIII
U2722A/U2723A Service Guide
Contents
List of Figures
1
XI
List of Tables
XII
Specifications
1
Product Characteristics
Product Specifications
2
Getting Started
2
4
9
Introduction 10
Self-Test 10
Self-Calibration 12
Keysight Technologies Calibration Services
Calibration Interval 14
Types of Service Available 14
Extended Service Contracts 14
Obtaining Repair Service (Worldwide) 15
Repackaging for Shipment 16
Cleaning 16
3
Performance Verification and Adjustment
Performance Verification and Adjustment
Recommended Test Equipment 18
Test Consideration 18
Performance Verification
Voltage Tests 19
Current Tests 21
14
17
18
19
Test Record Forms 24
Source Voltage Mode Programming and Readback
Accuracy 24
U2722A/U2723A Service Guide
IX
Contents
Source Current Mode Programming and Readback
Accuracy 25
Adjustment
X
26
U2722A/U2723A Service Guide
List of Figures
Figure 3-1 Voltage test setup (no load condition)
Figure 3-2 Current test setup (no load condition)
U2722A/U2723A Service Guide
20
22
XI
List of Tables
Table 3-1 Recommended test equipment 18
Table 3-2 Test settings for source voltage mode programming and
readback accuracy 19
Table 3-3 Test settings for source current mode programming and
readback accuracy 21
Table 3-4 Source voltage mode programming and readback
accuracy 24
Table 3-5 Source current mode programming and readback
accuracy 25
U2722A/U2723A Service Guide
XII
U2722A/U2723A USB Modular Source Measure Units
Service Guide
1
Specifications
Product Characteristics 2
Product Specifications 4
This chapter specifies the characteristics, environmental
conditions, and specifications of the U2722A/U2723A.
1
Specifications
Product Characteristics
REMOTE INTERFACE
• Hi-Speed USB 2.0
• USBTMC 488.2 Class device [1] [2]
POWER CONSUMPTION
• +12 VDC, 3 A maximum
• Isolated ELV power source
OPERATING ENVIRONMENT
• Operating temperature from 0 °C to +50 °C
• Relative humidity at 20% to 85% RH (non-condensing)
• Altitude up to 2000 meters
• Pollution degree 2
• For indoor use only
STORAGE COMPLIANCE
• –20 °C to 70 °C
• Relative humidity at 5% to 90% RH (non-condensing)
SAFETY COMPLIANCE
Certified with:
• IEC 61010-1:2001/EN61010-1:2001 (2nd Edition)
• Canada: CAN/CSA-C22.2 No. 61010-1-04
• USA: ANSI/UL 61010-1:2004
EMC COMPLIANCE
• IEC 61326-2002/EN61326:1997+A1:1998+A2:2001+A3:2003
• Canada: ICES-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004
SHOCK AND VIBRATION
Tested to IEC/EN 60068-2
I/O CONNECTOR
Output connectors
DIMENSIONS (W × D × H)
• 120.00 × 183.00 × 66.00 mm (with bumpers)
• 105.00 × 175.00 × 50.00 mm (without bumpers)
2
U2722A/U2723A Service Guide
Specifications
1
WEIGHT
• 700 g (with bumpers)
• 650 g (without bumpers)
WARRANTY
• Please refer to http://www.keysight.com/go/warranty_terms
• Three years for the product
• Three months for the product’s standard accessories,unless otherwise
specified
• Please take note that for the product, the warranty does not cover;
• Damage from contamination
• Normal wear and tear of mechanical components
• Manuals
[1] Compatible with Microsoft Windows operating systems only
[2] Requires a direct USB connection to the PC so the appropriate driver can be installed in the USB modular instrument or USB DAQ module
U2722A/U2723A Service Guide
3
1
Specifications
Product Specifications
General
U2722A/U2723A
Number of outputs
3
Output ratings (at 0 °C to 50 °C)
Voltage
–20 V to 20 V
Current
–120 mA to 120 mA
U2722A USB Modular Source Measure Unit performance specifications
Range
Accuracy[1]
Resolution
Voltage programming
±2V
0.075% + 1.5 mV
0.1 mV
12 months (at 25 °C ± 3 °C), ± (% of output + offset)
± 20 V
0.05% + 10 mV
1 mV
Current programming
± 1 μA
0.085% + 0.85 nA
100 pA
12 months (at 25 °C ± 3 °C), ± (% of output + offset)
± 10 μA
0.085% + 8.5 nA
1 nA
± 100 μA
0.075% + 75 nA
10 nA
± 1 mA
0.075% + 750 nA
100 nA
± 10 mA
0.075% + 7.5 μA
1 μA
± 120 mA
0.1% + 100 μA
20 μA
Voltage readback
±2V
0.075% + 1.5 mV
0.1 mV
12 months (over USB with respect to the actual
± 20 V
0.05% + 10 mV
1 mV
± 1 μA
0.085% + 0.85 nA
100 pA
12 months (over USB with respect to the actual
± 10 μA
0.085% + 8.5 nA
1 nA
output at 25 °C ± 3 °C), ± (% of output + offset)
± 100 μA
0.075% + 75 nA
10 nA
output at 25 °C ± 3 °C), ± (% of output + offset)
Current readback
± 1 mA
0.075% + 750 nA
100 nA
± 10 mA
0.075% + 7.5 μA
1 μA
± 120 mA
0.1% + 100 μA
20 μA
[1] Accuracy measurements are based on NPLC 10.
4
U2722A/U2723A Service Guide
Specifications
1
U2723A USB Modular Source Measure Unit performance specifications
Range
Accuracy[1]
Resolution
Voltage programming
±2V
0.075% + 1.5 mV
0.1 mV
12 months (at 23 °C ± 5°C), ± (% of output + offset)
± 20 V
0.05% + 10 mV
1 mV
Current programming
± 1 μA
0.085% + 0.85 nA
100 pA
12 months (at 23 °C ± 5°C), ± (% of output + offset)
± 10 μA
0.085% + 8.5 nA
1 nA
± 100 μA
0.075% + 75 nA
10 nA
± 1 mA
0.075% + 750 nA
100 nA
± 10 mA
0.075% + 7.5 μA
1 μA
± 120 mA
0.1% + 100 μA
20 μA
Voltage readback
±2V
0.075% + 1.5 mV
0.1 mV
12 months (over USB with respect to the actual
± 20 V
0.05% + 10 mV
1 mV
± 1 μA
0.085% + 0.85 nA
100 pA
12 months (over USB with respect to the actual
± 10 μA
0.085% + 8.5 nA
1 nA
output at 23 °C ± 5°C), ± (% of output + offset)
± 100 μA
0.075% + 75 nA
10 nA
output at 23 °C ± 5°C), ± (% of output + offset)
Current readback
± 1 mA
0.075% + 750 nA
100 nA
± 10 mA
0.075% + 7.5 μA
1 μA
± 120 mA
0.1% + 100 μA
20 μA
[1] Accuracy measurements are based on NPLC 10.
U2722A/U2723A Service Guide
5
1
Specifications
Performance characteristics
Rise/fall time (ms)[1]
± 1 μA
15.0
± 10 μA
5.0
U2723A USB Modular Source Measure Unit
± 100 μA
1.0
For resistive measurement[2]
± 1 mA
1.0
± 10 mA
1.0
± 120 mA
1.0
± 1 μA
170.0
± 10 μA
18.0
U2722A USB Modular Source Measure Unit
± 100 μA
6.0
For resistive measurement[2]
± 1 mA
1.0
± 10 mA
1.0
± 120 mA
1.0
[1] Drive 50% of 1 V or 10 V output with a resistive load. Rise time is from 10% to 90% of program voltage change at maximum
current. Fall time is from 90% to 10% of program voltage change at maximum current.
[2] Measurements obtained are per default bandwidth setting.
Noise 10 Hz to 20 MHz (Peak-peak)
Current range
Voltage Range
6
1 μA
10 μA
100 μA
1 mA
10 mA
120 mA
2V
50 mV
50 mV
50 mV
50 mV
30 mV
30 mV
20 V
50 mV
50 mV
50 mV
50 mV
30 mV
30 mV
U2722A/U2723A Service Guide
Specifications
Remote sense operating range
Ensure that the maximum voltage between the OUTPUT+ and
SENSE+, OUTPUT– and SENSE– does not exceed 3 V.
Temperature coefficient
Maximum change in output/readback per °C after a 30-minute
warm-up is 0.15.
Guard output resistance
0.2 kΩ
Output voltage overshoot, ±(% of
output + offset)[1]
During turn-on or turn-off, the output plus overshoot <0.1% + 10
mV.
Maximum sense lead resistance
1 MΩ for rated accuracy
Voltage line regulation
0.01% of range
Current line regulation
0.04% of range
Current load regulation
Current load regulation 0.04% + 100 μA
Programming language
Standard Commands for Programmable Instruments (SCPI)
Recommended calibration interval
One year
1
[1] Measurements obtained are per default bandwidth setting.
NOTE
• All channels are isolated from the ground and from each other.
Isolation is +60 VDC, Category I.
• Three hours warm-up time recommended.
• The measurement accuracy value is x ( 1 + a X y ),
where ,
• x = accuracy specification at room temperature[1],
• a = temperature coefficient, and
• y = temperature change for U2722A USB Modular Source Measure Unit: 22 °
C to 0 ° C, 28 ° C to 50 ° C
temperature change for U2723A USB Modular Source Measure Unit: 18 ° C to
0 ° C, 28 ° C to 50 ° C
[1] Typical room temperature is measured at 23 ° C.
U2722A/U2723A Service Guide
7
1
Specifications
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
8
U2722A/U2723A Service Guide
U2722A/U2723A USB Modular Source Measure Units
Service Guide
2
Getting Started
Introduction 10
Self-Test 10
Self-Calibration 12
Keysight Technologies Calibration Services 14
Calibration Interval 14
Types of Service Available 14
Extended Service Contracts 14
Obtaining Repair Service (Worldwide) 15
Repackaging for Shipment 16
Cleaning 16
This chapter discusses the self- test and self- calibration
procedure for the U2722A/U2723A USB Modular Source
Measure Units. It also provides the information for returning
your U2722A/U2723A to Keysight for calibration or servicing.
If you have a defective module, you can return it to Keysight
for repair or replacement.
2
Getting Started
Introduction
Self-Test
• A brief power-on self-test occurs automatically whenever
you turn on the instrument. This limited test assures that
the instrument is capable of operation.
• If the self-test fails, the power indicator on the front
panel will start blinking. You can use the SYSTem:ERRor?
query command from the remote interface to read the
error messages. If repair is required, contact a Keysight
Service Center. Please refer to the programmer’s reference
guide for more information on the error messages.
• Self-test may be initiated remotely by sending the *TST?
SCPI command to the instrument.
CAUTION
Disconnect all connections from the output terminals before
performing the self-test procedure. Ensure that the output terminals
are not connected to any load before you turn on the U2722A/U2723A.
Keysight Measurement Manager
To start the self- test procedure using the Keysight
Measurement Manager, perform the following steps.
1 Click Tools > Self-Test.
10
U2722A/U2723A Service Guide
Getting Started
2
2 Click Start on the Self- Test form.
3 Click OK to continue when the message box appears.
4 Wait for a few minutes for the self- test to complete.
5 The result is displayed on the form once the self- test has
completed.
U2722A/U2723A Service Guide
11
2
Getting Started
Self-Calibration
To perform self- calibration using the U2722A/U2723A
Keysight Measurement Manager, perform the following steps.
1 Click Tools > Self-Calibration.
2 Click Start on the Self- Calibration form.
12
U2722A/U2723A Service Guide
Getting Started
2
3 Click OK to continue when the message box appears.
4 Wait for a few minutes for the self- calibration to
complete.
5 The result is displayed on the form once the
self- calibration has completed.
CAUTION
U2722A/U2723A Service Guide
Disconnect all connections from the output terminals before
performing the self-calibration procedure. Ensure that the output
terminals are not connected to any load before you turn on the
U2722A/U2723A. It is recommended that the U2722A/U2723A is
powered-up for at least 45 minutes before performing self-calibration.
13
2
Getting Started
Keysight Technologies Calibration Services
When your instrument is due for calibration, contact your
local Keysight Service Center for a low-cost recalibration.
The U2722A/U2723A is supported on automated calibration
systems, which allows Keysight to provide this service at a
competitive price.
Calibration Interval
A one-year interval is adequate for most applications.
Accuracy specifications are under warranty only if
adjustments are made at regular calibration intervals.
Accuracy specifications will not be offered warranty beyond
the one-year calibration interval. Keysight does not
recommend extending calibration intervals beyond two years
for any application. Keysight recommends that a complete
readjustment should always be performed at the calibration
interval. This will ensure that the U2722A/U2723A will
remain within specifications for the next calibration interval.
The readjustment provides the best long- term stability and
accuracy.
Types of Service Available
If your instrument fails during the warranty period, Keysight
will repair or replace it under the terms of your warranty.
After your warranty expires, Keysight offers repair services
at competitive prices.
Extended Service Contracts
Most Keysight products are provided with optional service
contracts that extend the coverage period after the standard
warranty expires. If you have this service contract and your
instrument happens to fail during the coverage period,
Keysight will repair or replace it according to the contract.
14
U2722A/U2723A Service Guide
Getting Started
2
Obtaining Repair Service (Worldwide)
To obtain service for your instrument (in-warranty, under
service contract, or post-warranty), contact your nearest
Keysight Service Center. They will arrange to have your unit
repaired or replaced, and are able to provide warranty or
repair cost information where applicable.
To obtain warranty, service, or technical support information
you can contact Keysight at one of the following telephone
numbers.
In the United States: 800 829 4444
In Europe: 31 20 547 2111
In Japan: (81) 426 56 7832
You can also use our Web link for the information on
contacting Keysight worldwide:
www.keysight.com/find/assist
Or contact your Keysight representative.
Before shipping your instrument, ensure that you acquire
shipping instructions, including the components to be
shipped, from the Keysight Service Center. Keysight
recommends that you retain the original shipping carton for
use in such shipments.
U2722A/U2723A Service Guide
15
2
Getting Started
Repackaging for Shipment
If the unit is to be shipped to Keysight for service or repair,
make sure that you do the following.
• Attach a tag to the unit identifying the owner and
indicating the required service or repair. Include the
model number and full serial number.
• Place the unit in its original container with appropriate
packaging material for shipping.
• Secure the container with strong tape or metal bands.
• If the original shipping container is not available, place
your unit in a container with at least four inches of
compressible packaging material around all sides for the
instrument. Use static-free packaging materials to avoid
additional damage to your unit.
NOTE
Keysight suggests that you always insure your shipments.
Cleaning
Clean the outer area of the instrument with a soft, lint-free,
and slightly dampened cloth. Do not use detergent.
Disassembly is not required for cleaning.
16
U2722A/U2723A Service Guide
U2722A/U2723A USB Modular Source Measure Units
Service Guide
3
Performance Verification and
Adjustment
Performance Verification and Adjustment 18
Recommended Test Equipment 18
Test Consideration 18
Performance Verification 19
Voltage Tests 19
Current Tests 21
Test Record Forms 24
Source Voltage Mode Programming and Readback Accuracy 24
Source Current Mode Programming and Readback Accuracy 25
Adjustment 26
The performance verification procedures described in this
chapter verify that the U2722A/U2723A USB Modular Source
Measure Units is operating normally and is within its
warranted specifications.
3
Performance Verification and Adjustment
Performance Verification and Adjustment
This section contains the performance verification and
adjustment procedures. If the U2722A/U2723A fails any of
the tests or if any abnormal test results are obtained, return
the unit to the Keysight Service Center for readjustment.
Readjustment can also be carried out using Keysight
Measurement Manager revision 1.7 or above.
Recommended Test Equipment
The recommended test equipment for the performance
verification is listed in the table below. If the exact
equipment is not available, substitute the performance
verification standards of equivalent requirement(s).
Table 3-1 Recommended test equipment
Equipment
Requirement(s)
Recommended model
Purpose
Used
Digital multimeter
(DMM)
• 8½ digits resolution
Keysight 3458A
Measures DC
voltage and
current
Performance
verification and
adjustment
Test Consideration
For optimum performance, all procedures should comply
with the following recommendations.
• Ensure that the ambient temperature is stable and
between 22 °C and 28 °C. The ideal temperature for
performing performance verification should be 25 °C ± 1 °C.
• Make sure that the ambient relative humidity is less than
80%.
• Allow a three- hour warm-up period before performance
verification.
• Keep the test connection cables as short as possible.
18
U2722A/U2723A Service Guide
Performance Verification and Adjustment
3
Performance Verification
Voltage Tests
NOTE
Test each output channel individually. Refer to the appropriate test record
form.
Source Voltage Mode Programming and Readback Accuracy
This test verifies that the voltage programming and readback
through the USB are within published specifications.
Test Settings
Table 3-2 Test settings for source voltage mode programming and
readback accuracy
Keysight 3458A settings1
Function
Range
DC voltage
1 V (for U2722A/U2723A drives ≤ 1 V)
10 V (for U2722A/U2723A drives ≤ 10 V)
1 Use the highest resolution available on the DMM.
U2722A/U2723A Service Guide
19
3
Performance Verification and Adjustment
Test Setup
The test setup for no load condition is shown in the
following figure.
+S
+
+
SMU
DMM
–
–
–S
Figure 3-1 Voltage test setup (no load condition)
Test Procedure
1 Turn off the U2722A/U2723A. Connect the DMM to the
output to be tested (refer to Figure 3- 1). Ensure that no
load is connected. Turn on the U2722A/U2723A.
2 Configure the selected output as shown in the following.
a Configure the NPLC to 10.
b Configure the voltage range.
c Configure the current range.
d Program the clamp current, Iclamp.
e Program the drive voltage, Vdrive.
3 Enable the output.
4 Wait for a few seconds for the output to settle.
5 Record the voltage reading on the DMM, Vmeas.
6 Read back the drive voltage over the USB.
7 Record the readback voltage reading over the USB, Vrdbk.
8 Compute (Vmeas – Vdrive) and (Vrdbk – Vmeas). Compare
the values with the test limit values.
20
U2722A/U2723A Service Guide
Performance Verification and Adjustment
3
9 Repeat step 2 through step 8 for each iteration to
complete the performance verification for the selected
output.
10 Repeat step 1 through step 9 for the rest of the outputs.
Current Tests
Source Current Mode Programming and Readback Accuracy
This test verifies that the current programming and readback
through the USB are within published specifications.
Test Settings
Table 3-3 Test settings for source current mode programming and
readback accuracy
Keysight 3458A settings1
Function
Range
DC current
1 μA (for U2722A/U2723A drives ≤ 1 μA)
10 μA (for U2722A/U2723A drives ≤ 10 μA)
100 μA (for U2722A/U2723A drives ≤ 100 μA)
1 mA (for U2722A/U2723A drives ≤ 1 mA)
10 mA (for U2722A/U2723A drives ≤ 10 mA)
100 mA (for U2722A/U2723A drives ≤ 100 mA)
1 A (for U2722A/U2723A drives >100 mA)
1 Use the highest resolution available on the DMM.
U2722A/U2723A Service Guide
21
3
Performance Verification and Adjustment
Test Setup
The test setup for no load condition is shown in the
following figure.
+S
+
+
SMU
DMM
–
–
–S
Figure 3-2 Current test setup (no load condition)
Test Procedure
1 Turn off the U2722A/U2723A. Connect the DMM to the
output to be tested (refer to Figure 3- 2). Ensure that
there is no load connected. Turn on the U2722A/U2723A.
2 Configure the selected output as shown in the following.
a Configure the NPLC to 10.
b Configure the voltage range.
c Configure the current range.
d Program the clamp voltage, Vclamp.
e Program the drive current, Idrive.
3 Enable the output.
4 Wait for a few seconds for the output to settle.
5 Record the current reading on the DMM, Imeas.
6 Read back the drive current over the USB.
7 Record the readback current reading over the USB, Irdbk.
8 Compute (Imeas – Idrive) and (Irdbk – Imeas). Compare the
values with the test limit values.
22
U2722A/U2723A Service Guide
Performance Verification and Adjustment
3
9 Repeat step 2 through step 8 for each iteration to
complete the performance verification for the selected
output.
10 Repeat step 1 through step 9 for the rest of the outputs.
U2722A/U2723A Service Guide
23
3
Performance Verification and Adjustment
Test Record Forms
Source Voltage Mode Programming and Readback Accuracy
Table 3-4 Source voltage mode programming and readback accuracy
Iteration
Test point
Voltage range Clamp current Current range Vmeas – Vdrive Vrdbk – Vmeas
1
120 mA
120 mA
2
10 mA
10 mA
1 mA
1 mA
4
100 μA
100 μA
5
10 μA
10 μA
6
1 μA
1 μA
7
120 mA
120 mA
8
10 mA
10 mA
1 mA
1 mA
10
100 μA
100 μA
11
10 μA
10 μA
12
1 μA
1 μA
3
1V
2V
9
10 V
24
20 V
Limit
±2.25 mV
±15 mV
U2722A/U2723A Service Guide
Performance Verification and Adjustment
3
Source Current Mode Programming and Readback Accuracy
Table 3-5 Source current mode programming and readback accuracy
Iteration
1
2
3
4
5
6
Test point
Current range Clamp voltage Voltage range
0.5 μA
1 μA
5 μA
10 μA
50 μA
100 μA
0.5 mA
1 mA
7
8
9
5 mA
11
60 mA
U2722A/U2723A Service Guide
Limit
20 V
±1.275 nA
2V
2V
±1.275 nA
20 V
20 V
±12.75 nA
2V
2V
±12.75 nA
20 V
20 V
±112.5 nA
2V
2V
±112.5 nA
20 V
20 V
±1.125 μA
2V
2V
±1.125 μA
20 V
20 V
±11.25 μA
2V
2V
±11.25 μA
20 V
20 V
±0.16 mA
2V
2V
±0.16 mA
120 mA
12
Irdbk – Imeas
20 V
10 mA
10
Imeas – Idrive
25
3
Performance Verification and Adjustment
Adjustment
The following information describes the procedure for
voltage and current adjustments for the U2722A/U2723A
using Keysight Measurement Manager revision 1.7 or above.
1 Establish the connection between the U2722A/U2723A and
the PC. Launch the Keysight Measurement Manager as
shown below.
26
U2722A/U2723A Service Guide
Performance Verification and Adjustment
3
2 Select Tools > Source Measure > Adjustment to start the
adjustment.
3 A message box will appear to inform that the adjustment
operation will take approximately two hours. During this
period, you will not be able to operate the
U2722A/U2723A. Click Yes to continue with the
adjustment operation.
U2722A/U2723A Service Guide
27
3
Performance Verification and Adjustment
4 Establish the connection between the 3458A and the PC
to proceed with the adjustment operation. Click OK to
continue.
If the 3458A is not detected, an error message will appear
as shown in the following figure. Reconnect the 3458A to
the PC and click Yes to proceed. Select No to exit the
adjustment operation.
5 The 3458A and U2722A/U2723A will be triggered to
perform self- test and self- calibration. During this process,
make sure that there is no connection on the instruments
terminals. If self- test or self- calibration fails, cycle the
U2722A/U2723A power and repeat step 1 through step 5.
In the unlikely event that self- test or or self- calibration
repeatedly fails, contact your nearest Keysight Sales Office.
6 After the self- test and self- calibration have completed, a
message box shown in the following will appear to
indicate you to connect the respective U2722A/U2723A
output to the voltage terminal of the 3458A. After the
connection is established, click OK to continue. The
Keysight Measurement Manager will now perform voltage
adjustment on channel 1.
28
U2722A/U2723A Service Guide
Performance Verification and Adjustment
3
7 When the voltage adjustment has completed, connect the
respective U2722A/U2723A output to the current terminal
of the 3458A. After the connection is established, click OK
to continue with current adjustment for channel 1.
8 After the voltage and current adjustments for channel 1
have completed, the 3458A will proceed with voltage and
current adjustments for channel 2 followed by voltage and
current adjustments for channel 3. Follow the instructions
on the message box to complete the adjustment operation.
9 When the adjustment operation has completed, a message
box as shown in the following will appear. Click OK to end
the adjustment operation.
10 A message box will appear as shown below prompting you
to power cycle the U2722A/U2723A for the adjustment to
take effect. To power cycle the U2722A/U2723A, power off
the U2722A/U2723A and restart it. Ensure that the
U2722A/U2723A is powered- off properly before restarting.
U2722A/U2723A Service Guide
29
3
Performance Verification and Adjustment
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30
U2722A/U2723A Service Guide
Index
A
accuracy
Source Current Mode Programming and
Measurement, 21, 25
Source Voltage Mode Programming and
Measurement, 19, 24
specifications, 14
voltage/current programming, 4
voltage/current readback, 4
adjustment procedure. See procedure
Keysight
3458A, 18, 21
calibration services, 14
service, 14, 15
Keysight Measurement Manager
self-calibration, 12, 13
self-test, 10, 11
ambient
ideal temperature, 18
relative humidity, 18
temperature, 18
warm-up period, 18
cleaning, 16
compliance
EMC, 2
safety, 2
storage, 2
connection cable. See test
connector, output. See output
consideration, test. See test
contact, 10, 14, 15
contract, service, 14, 15
current
clamp, 20
DC, 21
drive, 22, 22
output ratings, 4
programmable, 18
programming, 4, 21
readback, 4, 21, 22
range, 20, 22
source. See source
test, 21, 22
D
C
Calibration
interval, 7, 14,
performance. See performance
procedure. See procedure
self. See Keysight Measurement
Manager
services. See Keysight
standards, 18
channel, 19, 20, 22
Characteristics, 1
performance, 6
product, 2
circuit, 6
U2722A/U2723A Service Guide
EMC, 2
environment, operating, 2
equipment, test. See test
G
guard, 7
H
Hi-Speed USB 2.0, 2
humidity, relative
ambient. See ambient
operating, 2
storage, 2
I
ideal temperature. See ambient
interface, remote. See remote
interval, calibration. See Calibration
I/O connector, 2
isolated, ELV power source. See power
isolation, 7
iteration, 21, 23, 24, 25
DC
current. See current
voltage, 19
degree, pollution. See pollution degree
Digital Multimeter, 18, 19, 20, 21, 22, 22
dimensions, 2
disassembly, 16
drive
current. See current
voltage. See voltage
L
limit, test. See test
load, 6, 10, 13, 20, 22
M
material, packaging, 16
MEAS:CURR?, 22
E
ELV power source, isolated. See power
31
Index
measurement
accuracy. See accuracy
manager. See Keysight Measurement
Manager
source current mode, 21, 25
source voltage mode, 19, 24
message box, 11, 13
multimeter, digital. See Digital Multimeter
N
noise, 6
no load condition, 20, 22
O
operating
environment. See environment,
operating
range, remote sense, 7
temperature, 2
OUTP ON, 20, 22
output
channel, 19
connector, 2
guard resistance. See guard
number, 4
ratings, 4
temperature coefficient, 7
terminals, 10, 13
test, 20, 21, 22
voltage overshoot, 7
P
packaging materials. See material,
packaging
performance
calibration, 17, 18
characteristics. See Characteristics
specifications, 4, 5
test, 18
pollution degree, 2
power
consumption, 2
source, isolated ELV, 2
32
procedure
adjustment, 26
calibration, 19, 20, 22
test, current, 22
test, voltage, 20
product
Keysight, 14
characteristics. See Characteristics
specifications, 4
programming
language, 7
source current mode, 21, 25
source voltage mode, 19, 24
voltage/current. See current or voltage
R
range, current/voltage. See current or
voltage
ratings, output. See output
readback. See current or voltage
recommended, test equipment, 18
record form, test. See test
Regulatory markings, VI
relative humidity. See humidity, relative
remote
interface, 2, 10
sense operating range. See operating
range, remote sense
repackaging for shipment, 16
repair service, 14, 15
resolution, 4, 18, 19, 21
result, test, 18
rise/fall time, 6
S
safety. See compliance
SCPI commands
programming language, 7
self-test, 10
Self-calibration. See Keysight
Measurement Manager
Self-test, 10
Keysight Measurement Manager. See
Keysight Measurement Manager
sense, remote. See remote
service
calibration, 14
contract, 14, 15
repair, 15
types, 14
settings, test. See test
setup, test. See test
shipment, 16
shock and vibration, 2
source
current mode, 21, 25
power, isolated ELV. See power
voltage mode, 19, 24
specifications
accuracy. See accuracy
performance. See performance
product. See product
standard
calibration, 18
commands, programming language.
See SCPI commands
warranty, 14
storage. See compliance
support, technical, 15
SYSTEM:ERROR?, 10
T
technical support. See support, technical
temperature
ambient/ideal. See ambient
coefficient, 7
operating. See operating
terminals
output. See output
U2722A/U2723A Service Guide
Index
test
connection cable, 18
consideration, 18
current. See current
equipment, 18
limit, 20, 22
procedure, calibration. See procedure
procedure, current. See procedure
procedure, voltage. See procedure
record form, 19, 24, 25
result. See result, test
self. See Self-test
settings, current, 21
settings, voltage, 19
setup, current, 22
setup, voltage, 20
shock and vibration, 2
voltage. See voltage
tools
self-calibration, 12
self-test, 10
*TST?, 10
types, service. See service
voltage
clamp, 22
DC, 19
drive, 20, 20
output ratings, 4
output, overshoot. See output
programmable, 18
programming, 4, 19, 21
range, 20, 22
readback, 4, 19, 20
source. See source
test, 19, 20, 20
W
warm-up, 7, 18
warranty, 3, 14
in, 15
post, 15
weight, 3
worldwide, repair service, 15
U
USB, 4, 19, 20, 22
Hi-Speed 2.0. See Hi-Speed USB 2.0
USBTMC 488.2, 2
V
vibration. See shock and vibration
U2722A/U2723A Service Guide
33
Index
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34
U2722A/U2723A Service Guide
www.keysight.com
Contact us
To obtain service, warranty or technical assistance, contact us at the following phone or fax
numbers:
United States:
(tel) 800 829 4444
(fax) 800 829 4433
Canada:
(tel) 877 894 4414
(fax) 800 746 4866
China:
(tel) 800 810 0189
(fax) 800 820 2816
Europe:
(tel) 31 20 547 2111
Japan:
(tel) (81) 426 56 7832 (fax) (81) 426 56 7840
Korea:
(tel) (080) 769 0800
(fax) (080) 769 0900
Latin America:
(tel) (305) 269 7500
Taiwan:
(tel) 0800 047 866
(fax) 0800 286 331
Other Asia Pacific Countries:
(tel) (65) 6375 8100
(fax) (65) 6755 0042
Or visit Keysight World Wide Web at:
www.keysight.com/find/assist
Product specifications and descriptions in this
document are subject to change without notice.
Always refer to the Keysight Web site for the latest revision.
This information is subject to change without notice.
© Keysight Technologies 2009 - 2014
Edition 6, November 2014
*U2722-90021*
U2722-90021
www.keysight.com
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