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U8000 Series User's Guide ENGLISH

1. CE ISM 1 A 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 ICES NMB 001 indicates that this ISM device complies with Canadian ICES 001 Qo c US The CSA mark is a registered trademark of the Canadian Standards Association A CSA mark indicates that the product is certified for Canadian markets to the applicable Canadian standards N10149 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 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 U8001A U8002A User s and 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 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
2. Service Guide 5 Current Monitoring Resistor To eliminate output current measurement error caused by the voltage drops in the leads and connections connect the current monitoring resistor Ry between the output terminal and the load as a four terminal device Connect the current monitoring leads inside the load lead connections directly at the monitoring points on the resistor element General Measurement Techniques To achieve best results when measuring load regulation peak to peak voltage and transient response time of the power supply measuring devices must be connected through the hole in the neck of the binding post at A while the load resistor is plugged into the front of the output terminals at B A measurement made across the load includes the impedance of the leads to the load The impedance of the load leads can easily be several orders of the magnitude greater than the power supply impedance and thus invalidate the measurement To avoid mutual coupling effects each measuring device must be connected directly to the output terminals by separate pairs of leads OUTPUT TERMINAL Front Panel Side View Figure 5 3 General Measurement U8001A U8002A User s and Service Guide 47 5 48 Service Guide Electronic Load Many of the test procedures require the use of a variable load resistor capable of dissipating the required power Using a variable load resistor requires that switches should be used
3. Set the knob to the current control to check that the front panel ammeter properly responds to knob control Turn the knob clockwise or counter clockwise when the display is in the meter mode the Limit annunciator is off Check that the ammeter responds to knob control and the voltmeter indicates nearly zero the voltmeter will show the voltage drop caused by the test lead Ensure that the current can be adjusted from zero to the full rated value Turn off the power supply and remove the short from the output terminals U8001A U8002A User s and Service Guide Quick Start 1 If the Power Supply Does Not Turn On Use the following steps to help solve problems you might encounter when turning on the instrument If you need more help refer to Chapter 5 for instructions on returning the instrument to Agilent Technologies for service 1 Verify that there is ac power to the power supply First verify that the power cord is firmly plugged into the power receptacle on the rear panel of the power supply You should also make sure that the power source you plugged the power supply into is energized Then verify that the power supply is turned on 2 Verify the power line voltage setting The line voltage is set to the proper value for your country when the power supply is shipped from the factory Change the voltage setting if it s not correct The settings are 100 115 or 230 Vac 3 Verify that the correct power line fuse
4. e AC coupling 8 Divide the reading of the RMS voltmeter by 10 and then multiply the result by 5 to get the RMS noise measurement The result should not exceed the RMS limits of 3 mApyg U8001A U8002A User s and Service Guide 61 5 Service Guide Voltage Calibration Before attempting to calibrate the power supply please ensure that you have disconnected all loads from the power supply and connect a digital voltmeter DVM across the output terminals You will be calibrating for low voltage middle voltage and high voltage point respectively Make sure that the power supply is in constant voltage CV mode along the voltage calibration 1 Enter calibration mode e In order to enter the calibration mode hold down the l Memory button when power on the power supply e The output is enabled The calibration will start with voltage calibration mode e Display will show C blinking e The CV annunciator will be turned on e Ensure that the power supply is in CV mode Otherwise the CC annunciator will fast blink 2 Low Voltage Calibration Point e Display will show C blinking The M1 annunciator will be turned on e Use the knob to enter the reading obtained from the DVM e Press the Memory button to save the changes and move to the next calibration point You will be able to perform this if the power supply is in CV mode 3 Middle Voltage Calibration Point e Display will show C blinking e The M2 annunciato
5. operations and features for the U8001A U8002A single output DC power supplies ott Agilent Technologies 17 3 Operations and Features Constant Voltage Operation 18 POWER A non Le Porr Display Limit voltage rrent ditage rent The following steps show you how to perform the constant voltage CV operation 1 Turn on the power supply e Press on the Power button to turn on the power supply The power supply will then perform a self test Self test is not indicated at display e The display turns on all segments and shows the firmware version briefly after that e The output is disabled by default e The OFF annunciator turns on e The display shows OFF 2 Set the display to the limit mode e Press on the Display Limit button in order to turn on the LIMIT annunciator e The display will show the voltage and current limit values When you press on the Display Limit button the voltage and current limit values will be shown on the display for about five seconds If there is no activity detected the display will return to meter view mode 3 Adjust for the desired output voltage e Press on the Voltage Current button When seeing the voltage value V blinks turn the knob to adjust for the desired output voltage value 4 Adjust for the desired current limit e Press on the Voltage Current button When seeing the current value
6. 3 Press on the Memory button if you want to use the shown settings as the current operating settings e The M1 M2 and M3 annunciators will be turned off To cancel the operation allow the unit to idle for five seconds U8001A U8002A User s and Service Guide 3 23 3 Operations and Features Programming Over Voltage Protection Over Voltage Over Voltage 24 Over voltage protection guards the load against output voltages reaching values greater than the programmed protection level The following steps show how to enable and disable the over voltage protection OVP how to set the OVP trip level and how to clear the over voltage condition To set the OVP trip level and enable OVP 1 Press on the Over Voltage button e The LIMIT annunciator will be turned off e The OVP annunciator will fast blink continuously e The display will show the OVP value and the character V will fast blink continuously 2 Turn the knob to adjust the OVP value 3 Press on the Over Voltage button again to end the adjustment and enable the OVP e Display will show donE e The OVP annunciator will be turned on To cancel the operation allow the unit to idle for five seconds U8001A U8002A User s and Service Guide Operations and Features 3 To disable OVP Ea 1 Press on the Over Voltage button to disable the OVP The OVP annunciator will eventually turn off To clear the over voltag
7. A blinks turn the knob to adjust for the desired current limit value U8001A U8002A User s and Service Guide Operations and Features 3 5 Return to the meter mode e Press on the Display Limit button to return to the meter _ mode The LIMIT annunciator will be turned off 6 Enable the output e Press on the Output On Off button to enable the output e The OFF annunciator turns off and CV annunciator turns on e The display is now in meter mode Verify that the power supply is in constant voltage mode Ensure that the constant voltage CV annunciator is on If the constant current CC annunciator is on instead choose a higher current limit U8001A U8002A User s and Service Guide 19 3 Operations and Features Constant Current Operation 20 The following steps show you how to perform the constant current operation 1 Short the binding posts POWER e e yon e Porr Press on the Power button to turn off the power supply Connect a short circuit between the positive and negative binding posts 2 Turn on the power supply POWER e o Porr Press on the Power button to turn on the power supply The power supply will then perform a self test The display turns on all segments and shows the firmware version briefly after that The output is disabled by default The OFF annunciator turns on 3 Set t
8. Codes for more information 30 U8001A U8002A User s and Service Guide Agilent U8001A U8002A Single Output DC Power Supplies User s and Service Guide 4 Specifications and Characteristics Performance Specifications 32 Supplemental Characteristics 33 This chapter lists the power supply s performance specifications and the supplemental characteristics of the equipment ee Agilent Technologies 31 4 Specifications and Characteristics Performance Specifications Table 4 1 Electrical Specifications Parameter U8001A U8002A Output Ratings at 0 C to 40 C 0 to 30 V 0 to 30 V 0to3A 0to5A Line and Load Regulation CV lt 0 01 2 mV CC lt 0 02 2 mA Ripple and Noise 25 C 5 C CV 12 mVp p lt 1 mVrms CC 3 mArms Load Transient Response Time lt 50 us within 15 mV from full load to half load and from half load to full load Programming Accuracy 25 C 5 C lt 0 35 20 mV lt 0 35 20 mA Readback Accuracy 25 C 5 C lt 0 35 20 mV lt 0 35 20 mA Meter Resolution Voltage 10 mV Current 10 mA Maximum Output Float Voltage 240 Vdc Specifications are based on 1 hour warm up period 32 U8001A U8002A User s and Service Guide Specifications and Characteristics 4 Supplemental Characteristics Table 4 2 Supplemental Characteristics Parameter U8001A U8002A Temperature Coeffic
9. Main PCA U8002A U8001 60007 Transformer 90 W U8002 60007 Transformer 150 W 2110 0014 Fuse 4 0 A T for 100 Vac and 115 Vac U8001A 2110 0006 Fuse 2 0 A T for 230 Vac U8001A 2110 0722 Fuse 6 25 A T for 100 Vac and 115 Vac U8002A 2110 1425 Fuse 2 8 A T for 230 Vac U8002A U8001A U8002A User s and Service Guide Service Guide 5 Troubleshooting This section provides a brief check list of common failures Before troubleshooting or repairing the power supply make sure that the failure is in the instrument rather than any external connections Also make sure that the instrument is accurately calibrated Unit is Inoperative e Verify that the AC power cord is connected to the power supply e Verify that the front panel power switch is at ON position e Verify the power line voltage setting e Verify that the power line fuse is installed Model Agilent Part Number Part Description U8001A 2110 0014 Fuse 4 0 A T for 100 Vac and 115 Vac 2110 0006 Fuse 2 0 A T for 230 Vac U8002A 2110 0722 Fuse 6 25 A T for 100 Vac and 115 Vac 2110 1425 Fuse 2 8 A T for 230 Vac U8001A U8002A User s and Service Guide 39 5 Service Guide Line Voltage Conversion WARNING Shock Hazard Operating personnel must not remove power supply covers Component replacement and internal adjustment must be made only by qualified service personnel Line voltage conversion is accomplished by adjusting two comp
10. is installed The correct fuse is installed for your country when the power supply is shipped from the factory See the table below to replace the fuse for your power supply Model Agilent Part Number Part Description U8001A 2110 0014 Fuse 4 0 A T for 100 and 115 Vac 2110 0006 Fuse 2 0 A T for 230 Vac U8002A 2110 0722 Fuse 6 25 A T for 100 and 115 Vac 2110 1425 Fuse 2 8 A T for 230 Vac Figure 1 1 List of Rated Fuse for Line Voltages U8001A U8002A User s and Service Guide 5 1 Quick Start To Rack mount the Instrument You can mount the power supply in a standard 19 inch rack cabinet using one of three optional kits available Instructions and mounting hardware are included with each rack mounting kit oO oO To rack mount a single instrument order adapter kit 5063 9240 O O QO O To rack mount two instruments side by side order lock link kit 5061 9694 and flange kit 5063 9212 Be sure to use the support rails inside the rack cabinet To install two instruments in a sliding support shelf order support shelf 5063 9255 and slide kit 1494 0015 6 U8001A U8002A User s and Service Guide Agilent U8001A U8002A Single Output DC Power Supplies User s and Service Guide 2 General Information Front Panel at a Glance 8 Rear Panel ata Glance 9 Display Annunciators 10 Description 11 Installat
11. provides general description of the instrument front and rear panel overview display annunciators and installation guidelines for the U8001A U8002A single output DC power supplies Operations and Features Chapter 3 provides detailed description of the operations and features for the U8001A U8002A single output DC power supplies Specifications and Characteristics Chapter 4 lists the power supply s performance specifications and the supplemental characteristics of the equipment Service Guide Chapter 5 contains service information for the U8001A U8002A single output DC power supplies including warranty information general diassemble verification steps to troubleshoot the connectivity and functionality detailed calibration procedures for your power supply related documentation and Agilent contacts U8001A U8002A User s and Service Guide Contents Chapter 1 Quick Start Preliminary Checkout 2 Output Checkout 3 Voltage Output Checkout 3 Current Output Checkout 4 If the Power Supply Does Not Turn On 5 To Rack mount the Instrument 6 Chapter 2 General Information Front Panel at a Glance 8 Rear Panel ata Glance 9 Display Annunciators 10 Description 11 Installation 13 Initial inspection 13 Cooling and location 14 Output Connections 15 Voltage drops 15 Chapter 3 Operations and Features Constant Voltage Operation 18 Constant Current Operation 20 Memory Operations 22 Storing Operating State 22 U8001A U8
12. shown as below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Agilent office or visit www agilent com environment product for more information U8001A U8002A User s and Service Guide Vil Vill A DECLARATION OF CONFORMITY Agilent Technologies According to EN ISO IEC 17050 1 2004 C Manufacturer s Name Agilent Technologies Microwave Products M Sdn Bhd Manufacturer s Address Bayan Lepas Free Industrial Zone 11900 Bayan Lepas Penang Malaysia Declares under sole responsibility that the product as originally delivered Product Name Single Output DC Power Supplies Models Number U8001A U8002A Product Options This declaration covers all options of the above product s complies with the essential requirements of the following applicable European Directives and carries the CE marking accordingly Low Voltage Directive 2006 95 EC EMC Directive 2004 1 08 EC and conforms with the following product standards EMC Standard Limit IEC 61326 2002 EN 61326 1997 A1 1998 A2 2001 A3 2003 CISPR 11 1990 EN55011 1990 Class A Group 1 IEC 61000 4 2 1995 EN 61000 4 2 1995 4kV CD 8kV AD IEC 61000 4 3 1995 EN 61000 4 3 1996 3 V m 80 1000 MHz IEC 61000 4 4 1995 EN 61000 4 4 1995 0 5 kV signal lines 1 kV power lines IEC 61000 4 5 1995 EN 61000 4 5 1995 0 5 kV line line 1 kV line ground IEC 61000 4 6 1996 EN 61000 4 6 1996 3 V 0 15 8
13. 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 7690800 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 Agilent worldwide web at www agilent com find assist Product specifications and descriptions in this document subject to change without notice Always refer to Agilent web site for the latest revision Agilent Technologies Inc 2008 Printed in Malaysia First Edition May 22 2008 U8001 90001 l Agilent Technologies
14. the Memory button to reenter the calibration mode The calibration will start with voltage calibration mode Exit calibration mode e Turn off the power supply to exit the calibration mode Toggle between calibration modes e Along the calibration process you can toggle between voltage calibration mode and current calibration mode by pressing the Voltage Current button U8001A U8002A User s and Service Guide 65 5 Service Guide 66 U8001A U8002A User s and Service Guide Agilent U8001A U8002A Single Output DC Power Supplies User s and Service Guide Appendix Appendix A List of Error Codes 68 gy Agilent Technologies 67 Appendix Appendix A List of Error Codes The following table contains the list of error codes and the interpretations for each code Operation Errors Codes Descriptions 101 Flash read write failed 102 Invalid calibration data 111 Temperature too high Calibration Errors Codes Descriptions 201 Flash read write failed 211 Calibration failed for DAC CV 212 Calibration failed for DAC CC 213 Calibration failed for ADC CV 214 Calibration failed for ADC CC 215 Calibration failed for DAC OV 216 Calibration failed for DAC OC 68 Agilent U8001A U8002A User s and Service Guide www agilent com Contact us To obtain service warranty or technical support assistance contact us at the fol lowing phone numbers United States
15. to connect disconnect and short the load resistor An electronic load if available can be used in place of a variable load resistor and switches The electronic load is considerably easier to use than load resistors It eliminates the need for connecting resistors or rheostats in parallel to handle power it is much more stable than carbon pile load and it makes easy work of switching between load conditions as is required for the load regulation and load response tests Substitution of the electronic load requires minor changes to the test procedures in this chapter U8001A U8002A User s and Service Guide Service Guide 5 Constant Voltage CV Verification Voltage Programming and Readback Accuracy This test is to verify that the voltage programming and readback accuracy are within published specifications Procedures 1 Power off the power supply and connect a DMM between the and terminals of the output to be tested Remove the electronic load or resistor block as shown in Figure 5 2 A to operate as an open circuit Power on the power supply When the power supply is in limit mode program the output voltage to 0 V and the output current to the maximum programmable value Enable the output Wait for a few seconds for the output of the power supply to settle Make sure that the power supply is in CV mode Record the voltage reading on the DMM Vpyy This value should be within the limit of 0 V 20 m
16. 0 MHz IEC 61000 4 11 1994 EN 61000 4 11 1994 1 cycle 100 Canada ICES 001 2004 Australia New Zealand AS NZS CISPR11 2004 The product was tested in a typical configuration with Agilent Technologies test systems Safety EC 61010 1 2001 EN 61010 1 2001 Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 amp 206349 This DoC applies to above listed products placed on the EU market after OK 26 May 2008 Date Tay Eng Su Quality Manager For further information please contact your local Agilent Technologies sales office agent or distributor or Agilent Technologies Deutschland GmbH Herrenberger Stra e 130 71034 B blingen Germany Template A5971 5302 2 Rev E U8001A DoC Revision 1 0 U8001A U8002A User s and Service Guide Product Regulations EMC Performance Criteria TEC 61326 1 2002 EN 61326 1 1997 A1 1998 A2 2001 A3 2003 CISPR 11 1990 EN 55011 1990 Group 1 Class A TEC 61000 4 2 1995 EN 61000 4 2 1995 ESD 4kV CD 8kV AD TEC 61000 4 3 1995 EN 61000 4 3 1996 3V m 80 AM TEC 61000 4 4 1995 EN 61000 4 4 1995 EFT 0 5kV line line 1kV line earth TEC 61000 4 5 1995 EN 61000 4 5 1995 Surge 0 5kV line line 1kV line earth TEC 61000 4 6 1996 EN 61000 4 6 1996 3V 0 15 80 MHz 80 AM power line TEC 61000 4 11 1994 EN 61000 4 11 1994 Dips 1 cycle 100 Canada ICES 001 2004 Australia New Zealand AS NZS CISPR1 1 2004 rPrPrrre Safety TEC 61010 1 2001 E
17. 002A User s and Service Guide Xl Contents XII Recalling Operating State 23 Programming Over Voltage Protection 24 Programming Over Current Protection 26 Keylock Operation 28 Backlight Operation 29 System Related Operations 30 Reset to factory defaults 30 Power on self test 30 Chapter 4 Specifications and Characteristics Performance Specifications 32 Supplemental Characteristics 33 Chapter 5 Service Guide Equipment Warranty 36 Replacement Parts 38 Troubleshooting 39 Line Voltage Conversion 40 Performance Verification and Calibration 43 Constant Current CC Verification 56 Voltage Calibration 62 Current Calibration 64 Appendix Appendix A List of Error Codes 68 U8001A U8002A User s and Service Guide Agilent U8001A U8002A Sinlge Output DC Power Supplies User s and Service Guide 1 Quick Start Preliminary Checkout 2 Output Checkout 3 If the Power Supply Does Not Turn On 5 To Rack mount the Instrument 6 This chapter is intended for both the experienced and inexperienced users because it calls attention to certain checks that should be made prior to operation ott Agilent Technologies 1 1 Quick Start Preliminary Checkout The following steps help you to validate that the power supply is ready for use 1 Check the list of supplied item Verify that you have received the following items together with your power supply If anything is found missing contact your nearest Agilent Technologies Sal
18. Agilent U8001A U8002A Single Output DC Power Supplies User s and Service Guide a Agilent Technologies Notices Agilent Technologies Inc 2008 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 8001 90001 Edition First Edition May 22 2008 Printed in Malaysia Agilent Technologies Inc 3501 Stevens Creek Blvd Santa Clara CA 95052 USA Microsoft is a U S registered trademark of Microsoft Corporation Warranty The material contained in this docu ment is provided as is and is sub ject to being changed without notice in future editions Further to the max imum extent permitted by applicable law Agilent 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 par ticular purpose Agilent shall not be liable for errors or for incidental or consequential damages in connec tion with the furnishing use or per formance of this document or of any information contained herein Should Agilent and the user have a separate written agreement with warranty terms covering the material in t
19. N 61010 1 2001 Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 Additional Information The product herewith complies with the essential requirements of the Low Voltage Directive 2006 95 EC and the EMC Directive 2004 108 EC and carries the CE Marking accordingly European Union Performance Criteria A Pass Normal operation no effect B Pass Temporary degradation self recoverable C Pass Temporary degradation operator intervention required D Fail Not recoverable component damage N A Not applicable Notes Regulatory Information for Canada ICES NMB 001 2004 This ISM device complies with Canadian ICES 001 Cet appareil ISM est confomre la norme NMB 001 du Canada Regulatory Information for Australia New Zealand This ISM device complies with Australian New Zealand AS NZS CISPR11 2004 N10149 U8001A U8002A User s and Service Guide IX In This Guide This guide provides step by step set up and configuration instructions that get you familiarized with the operations of the Agilent U8001A U8002A single output DC power supplies This guide also contains service information and troubleshooting guidelines that help to resolve your problems during startup configurations Quick Start Chapter 1 provides preliminary checkout output checkout line voltage conversion and instruction to rack mount for the U8001A U8002A single output DC power supplies General Information Chapter 2
20. U8001A U8002A User s and Service Guide 21 3 Operations and Features Memory Operations For Agilent U8001A U8002A single output DC power supplies up to three operating states can be stored in non volatile storage locations The storage feature remembers the voltage and current limit value settings OVP ocpt On Off states and OVP OCP trip levels The following steps show you how to store and recall an operating state Storing Operating State 1 Press on the Memory button The M1 annunciator will blink 2 Turn the knob to choose the memory location for storing the operation state e The M1 M2 and M3 annunciators will blink ina round robin manner 3 Press on the Memory button again to save the operating state in the chosen memory e Display will show donE e The M1 M2 and M3 annunciators will be turned off To cancel the operation allow the unit to idle for five seconds OVP over voltage protection t OCP over current protection 22 U8001A U8002A User s and Service Guide Operations and Features Recalling Operating State 1 Press and hold the Memory button lemory i The M1 annunciator will be turned on e The LIMIT annunciator will be turned off e The display shows the settings saved in M1 memory location 2 Turn the knob to show the settings saved in M1 M2 and M3 memory locations e The M1 M2 and M3 annunciators will be turned on in round robin manner
21. V When the power supply is in meter mode record the voltage reading displayed on the front display of the power supply This value should be within the limit of Vpyyyq 20 mV Disable the output When the power supply is in limit mode program the output voltage to full rated value i e 30 V 10 Enable the output 11 Wait for a few seconds for the output of the power supply to settle Make sure that the power supply is in CV mode 12 Record the voltage reading on the DMM Vpym This value should be within the limit of 30 V 0 125 V 13 When the power supply is in meter mode record the voltage reading displayed on the front display of the power supply This value should be within the limit of Vpyyyy 0 125 V U8001A U8002A User s and Service Guide 49 5 Service Guide CV Load Effect Load Regulation This test measures the change in the output voltage resulting from a change in the output current from full load to no load or vice versa Procedures 1 50 Power off the power supply and connect a DMM between the and terminals of the output as shown in Figure 5 2 A Power on the power supply When the power supply is in limit mode program the output voltage to full rated value i e 30 V and output current to the maximum programmable value Enable the output Operate the electronic load in constant current mode and set its current to 3 A for U8001A and 5 A for U8002A Ensure that the po
22. able 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 Agilent suggests that you always insure your shipments Cleaning No cleaning is required for this product If you wish to remove dust from the enclosure use a dry cloth U8001A U8002A User s and Service Guide 37 5 Service Guide Replacement Parts 38 This section contains information for ordering replacement parts for your instrument The parts lists are divided into the following sections e Parts are listed in alphanumeric order according to their reference designators e The parts lists include a brief description of each part with applicable Agilent part number To Order Replaceable Parts You can order replaceable parts from Agilent using the Agilent part number Note that not all parts listed in this chapter are available as field replaceable parts To order replaceable parts from Agilent do the following 1 Contact your nearest Agilent Sales Office or Service Center 2 Identify the parts by the Agilent part number shown in the replaceable parts list 3 Provide the instrument model number and serial number Table 5 1 Replaceable Parts Part Number Description U8001 60002 Front Panel Assembly U8001 U8002 60002 Front Panel Assembly U8002 U8001 66502 Main PCA U8001A U8002 66502
23. all markings on the device before connecting any wiring to the device Do not operate the device in the presence of flammable gases or fumes Do not install substitute parts or perform any unauthorized modification to the device Use only the power adapter provided by the manufacturer to avoid any unexpected hazards CAUTION Use the device with the cables provided e Repair or service that this not covered in this manual should only be performed by qualified personnels U8001A U8002A User s and Service Guide Environment Conditions This instrument is designed for indoor use in an installation category Il pollution degree 2 area Table 1 shows general environment requirements Table 1 Environment Requirements Environment Conditions Requirements Operating Temperature 0 C to 40 C for full rated output 40 C to 55 C for derated output Operating Relative Humidity max Up to 95 Storage Temperature 20 C to 70 C Altitude Up to 2000 m CAUTION The Agilent U8001A U8002A single output DC power supplies comply with the following safety and EMC requirements IEC 61326 2002 EN 61326 1997 A1 1998 A3 2003 CISPR 11 1990 EN 55011 1990 Canada ICES 001 2004 Australia New Zealand AS NZS CISPR11 2004 IEC 61010 1 2001 EN 61010 1 2001 24 Edition e Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 U8001A U8002A User s and Service Guide Vv Regulatory Markings Vi
24. annunciator will be turned on e Ensure that the power supply is in CC mode Otherwise the CV annunciator will fast blink 2 Low current calibration point e Display will show C blinking e The M1 annunciator will be turned on e Use the knob to enter the computed value DVM reading divided by shunt resistance e Press the Memory button to save the changes and move to the next calibration point You will be able to perform this if the power supply is in CC mode 64 U8001A U8002A User s and Service Guide Memory Service Guide 5 3 Middle current calibration point e Display will show C blinking e The M2 annunciator will be turned on e Use the knob to enter the computed value DVM reading divided by shunt resistance e Press the Memory button to save the changes and move to the next calibration point You will be able to perform this if the power supply is in CC mode High current calibration point e Display will show C blinking e The M3 annunciator will be turned on e Use the knob to enter the computed value DVM reading divided by shunt resistance e Press the Memory button to save the changes and the whole calibration process is done You will be able to perform this if the power supply is in CC mode Calibration done e Display will show donE CAL e The output is disabled and the OFF annunciator will be turned on Reenter calibration mode e Press
25. ant voltage CV or constant current CC operation Over voltage protection OVP and Over current protection OCP Three storage locations M1 to M3 for user defined operating states Keypad lock capability Physical lock mechanism The front panel operation permits Easy to use control features Enabling or disabling OVP and OCP Setting the OVP and OCP trip levels Clearing OVP and OCP conditions Setting and displaying the voltage and current limit values Operating state storage recall Resetting the power supply to power on state Calibrating the power supply Enabling or disabling the output U8001A U8002A User s and Service Guide 11 2 12 General Information The front panel liquid crystal display LCD includes e Displaying actual values of output voltage and current meter mode e Or displaying the limit values of voltage and current limit mode e Checking the operating status from the annunciators Front panel binding posts are available to connect load wires for bench operation WARNING Floating the power supply output more than 240 Vdc from the chassis presents an electric shock hazard to the operator U8001A U8002A User s and Service Guide General Information 2 Installation Initial inspection When you receive your power supply inspect it for any obvious damage that may have occurred during shipment If any damage is found notify the carrier and the nearest Agilent Technologi
26. ction LOCK Limit wW M2 M3 BOVPEOCPE LOCK LIMIT OFF Go 0UV BODA Constant Voltage Constant Current Annunciators Functions M1 Stores states of power supply in non volatile memory M2 When the power supply is in calibration mode it can be used to store calibration M3 constant OVP The over voltage protection function is enabled when the annunciator turns on or the over voltage protection circuit has caused the power supply to shutdown when the annunciator blinks OCP The over current protection function is enabled when the annunciator turns on or the over current protection circuit has caused the power supply to shutdown when the annunciator blinks LOCK The front panel operation is disabled LIMIT The display shows the limit values of voltage and current OFF The output of the power supply is disabled CV The power supply is in constant voltage mode when the annunciator blinks cc The power supply is in constant current mode when the annuciator blinks U8001A U8002A User s and Service Guide Description General Information 2 The Agilent U8001A U8002A single output DC power supplies are compact general purpose bench supplies that are suitable for either bench or rack mounted operations These power supplies feature linear power supply performance and capable usabilities making them ideal for power systems applications Operational features include Single output Const
27. e Regulation This test measures the change in output current that results from a change in AC line voltage from the minimum value to the maximum value Procedures 1 Power off the power supply and connect the output to be tested as shown in Figure 5 2 B with the DMM connected across the current monitoring resistor Ry Connect the AC power line through an AC voltage source Adjust the AC voltage source to provide nominal input voltage to the power supply Power on the power supply When the display is in the limit mode program the output voltage to maximum programmable value and output current to full rated value i e 3 A for U8001A and 5 A for U8002A Enable the output Operate the electronic load in constant voltage mode and set its voltage to 30 V Ensure that the power supply is in CC mode If not adjust the electronic load so that the output voltage drops slightly until the power supply is in CC mode Adjust the AC voltage source to low line voltage limit Record the output current reading by dividing the voltage reading on the DMM by the resistance of the current monitoring resistor Within a few seconds after step 7 adjust the AC voltage source to high line voltage limit and record the output current reading by dividing the voltage reading on the DMM by the resistance of the current monitoring resistor U8001A U8002A User s and Service Guide 59 60 5 Service Guide 9 Compare the reading obtained in s
28. e condition 1 OVP trip can only occur when the output is enabled When the OVP condition occurs e The output is disabled and the OFF annunciator will be turned on Ifthe keylock feature was enabled it will be disabled The LOCK annuciator will be turned off e The OVP annunciator will fast blink continuously e The display will show TRIP over 2 To clear the OVP trip conditon press on the Over Voltage age z button again If OVP trip persists decrease the voltage limit settings to clear the tripping U8001A U8002A User s and Service Guide 25 3 Operations and Features Programming Over Current Protection Over Current Over Current 26 Over current protection guards the load against output currents reaching values greater than the programmed protection level The following steps show how to enable and disable the over current protection OCP how to set the OCP trip level and how to clear the over voltage condition To set the OCP trip level and enable OCP 1 Press on the Over Current button e The LIMIT annunciator will be turned off e The OCP annunciator will fast blink continuously e The display will show the OCP value and the character A will fast blink continuously 2 Turn the knob to adjust the OCP value 3 Press on the Over Current button again to end the adjustment and enable the OCP e Display will show donE e The OCP annunciator will be turned o
29. electronic load in constant current mode 2 Power on the power supply 3 When the display is in the limit mode program the output voltage to full rated value i e 30 V and output current to the maximum programmable value 4 Enable the output Set the electronic load to transient operation mode between one half of the output s full rated value and the output s full rated value at a 1 kHz rate with 50 duty cycle Set the oscilloscope coupling internal sync and lock on either the positive or negative load transient Adjust the oscilloscope to display transients as shown in Figure 5 4 Note that the pulse width t2 t1 of the transients at 15 mV from the base line is no more than 50 us for the output U8001A U8002A User s and Service Guide Service Guide 5 File Control 10 11 AM jui Setup Measure Analyze Utilities Help ti S ojo as x Figure 5 4 Graph of load transient response U8001A U8002A User s and Service Guide 55 5 Service Guide Constant Current CC Verification 56 Current Programming and Readback Accuracy This test is to verify that the current programming and readback accuracy are within published specifications The accuracy of the current monitoring resistor must be 0 1 or better Procedures 1 Power off the power supply and connect a 0 01 current shunt monitoring resistor Ry across the output to be tested and a DMM across the current monitoring
30. er to Appendix A List of Error Codes for list of error codes U8001A U8002A User s and Service Guide Service Guide 5 Performance Verification and Calibration This chapter contains performance verification and calibration procedures The performance verification procedures allow you to verify that the power supply is operating within its published specifications The calibration procedures show how to make voltage and current adjustment on the power supply Agilent Technologies Calibration Services When your instrument is due for calibration contact your local Agilent Service Center for a low cost recalibration Calibration Interval One year interval is recommended for most applications Accuracy specifications are warranted only if calibration is made at regular calibration interval Accuracy specifications are not warranted beyond the one year calibration interval Agilent does not recommend extending calibration intervals beyond two years for any application Agilent recommends that complete re adjustment should always be performed at the calibration interval This will increase your confidence that the U8001A and U8002A will remain within specification for the next calibration interval The re adjustment provides the best long term stability and accuracy U8001A U8002A User s and Service Guide 43 5 Service Guide Recommended Test Equipment Table 5 2 List of Equipment The test equipment recommended for the ca
31. es Sales Office immediately Warranty information is shown in the front of this manual Keep the original packing materials in case the power supply has to be returned to Agilent Technologies in the future If you return the power supply for service attach a tag identifying the owner and model number Also include a brief description of the problem Mechanical Check This check confirms that there are no broken terminals or knob and that the cabinet and panel surfaces are free of dents and scratches Verify that the display is not scratched or cracked Electrical Check Chapter 1 describes quick operation procedure that verifies to a high level of confidence that the power supply is operating in accordance with its specifications More complete verification procedures are included in the Service Guide on page 35 U8001A U8002A User s and Service Guide 13 2 14 General Information Cooling and location Cooling The power supply can operate at rated specifications within the temperature range of 0 C to 40 C Power supply loading is derated from 40 C to 55 C A fan cools the power supply by drawing air through the sides and exhausting it out the back Using an Agilent rack mount will not impede the flow of air Bench Operation Your power supply must be installed in a location that allows sufficient space at the sides and rear of the power supply for adequate air circulation Cleaning No cleaning is requi
32. es Office Power cord Certificate of Calibration Product Reference CD ROM 2 Connect the power cord and turn on the power supply The front panel display will light up while the power supply performs its power on self test The firmware revision is also displayed If the power supply does not turn on properly see page 5 The power supply is shipped from the factory with a power line cord that has a plug approriate for your location Your power supply is equipped with a 3 wire grounding type power cord the third conductor being the ground The power supply is grounded only when the power line cord is plugged into an appropriate receptacle Do not operate your power supply without adequate cabinet ground connection 2 U8001A U8002A User s and Service Guide Quick Start 1 Output Checkout The following procedures check to ensure that the power supply develops its rated outputs and properly responds to operation from the front panel For complete performance and verification tests refer to the Service Guide If an error has been detected during the output checkout procedures the ERROR annunciator will be turned on See Appendix A List of Error Codes for more information Voltage Output Checkout The following steps verify basic voltage functions with no load 1 Turn on the power supply The power supply is in a power on reset state the output is disabled the OFF annunciator turns on 2 Enable the ou
33. he display to the limit mode gpl g spla Press on the Display Limit button in order to turn on the LIMIT annunciator The display will show the voltage and current limit values When you press on the Display Limit button the voltage and current limit values will be shown on the display for about five seconds If there is no activity detected the display will return to meter view mode 4 Adjust for the desired voltage limit Sitage rrent Press on the Voltage Current button When seeing the voltage value V blinks turn the knob to adjust for the desired voltage limit value U8001A U8002A User s and Service Guide Operations and Features 3 r 5 Adjust for the desired output current e Press on the Voltage Current button When seeing the current value A blinks turn the knob to adjust for the desired output current value 6 Return to the meter mode e Press on the Display Limit button to return to the meter mode The LIMIT annunciator will be turned off 7 Enable the output atte e Press on the Output On Off button to enable the output e The OFF annunciator turns off and constant current CC annunciator turns on e The display is now in meter mode Verify that the power supply is in constant current mode Ensure that the constant current CC annunciator is on If the constant voltage CV annunciator is on instead choose a higher voltage limit
34. his document that conflict with these terms the warranty terms in the sep arate 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 U S Government Restricted Rights Soft 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 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 A WARNING notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly per formed or adhered to could result in personal injury or death Do not proceed beyond a WARNING notice until the indicated cond
35. i tions are fully understood and met U8001A U8002A User s and 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 Off supply Alternating current On supply le Both direct and alternating current Equipment protected throughout by double insulation or reinforced insulation Three phase alternating current Caution risk of electric shock il A Earth ground terminal Caution risk of danger refer to this manual for specific Warning or Caution information Protective conductor terminal gt ee E o Caution hot surface Frame or chassis terminal Out position of a bi stable push control e Equipotentiality i In position of a bi stable push control U8001A U8002A User s and Service Guide 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 specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies assumes no liability for customer s failure to comply with these requirements Do not use the device if it appears damaged or defective Observe
36. ient for 12 months CV lt 100 ppm C CC lt 380 ppm C CC lt 300 ppm C Output Voltage Overshoot lt 1V during turn on or turn off AC power state with the output control set to less than 1 V Voltage Programming Speed to within 1 of total excursion Up Full Load 150 ms No Load 100 ms Down Full Load 30 ms No Load 450 ms Last Memory Setting Enabled Yes Over Voltage Protection Response Time lt 1 5 ms when the trip voltage is equal or greater than 3 V and lt 10 ms when the trip voltage is less than 3 V average time for output to drop from 90 of output voltage to 1 V after OVP condition occured Table 4 3 Protection Features Parameter U8001A U8002A Over Voltage Protection Accuracy lt 0 5 0 5 V of output offset Over Voltage Protection Programmable 1V to 33 V Range Over Current Protection Accuracy lt 0 5 0 5A of output offset Over Current Protection Programmable 1Ato3 3 A 1Ato5 5A Range U8001A U8002A User s and Service Guide 33 4 Specifications and Characteristics Table 4 4 AC Power Input Specifications Parameter Input Power Option Selectable U8001A U8002A 100 Vac 10 47 to 63 Hz 115 Vac 10 47 to 63 Hz 230 Vac 10 47 to 63 Hz Fuse External customer assessable Table 4 5 Physical Specifications Parameter Dimension W x H x L U8001A U8002A 88 1 mm x 212 3 mm x 394 3 mm Weight kg 7 3 kg 8 3 kg 34 U8001A U8002A U
37. ion 13 Output Connections 15 This chapter provides general description of the instrument front panel overview rear panel overview display annunciators and installation guidelines for U8001A U8002A single output DC power supplies ot Agilent Technologies 2 General Information Front Panel at a Glance eT Tr U8001A SS Agi Se Agilent oye Output DC Power Supply p 0 30V 3A 2 8 Memory A is 3a A Back Over 4 Light Osment 5 Hes FUNCTION OUTPUT A 240 VOCMAXTOL Panels Functions 1 LCD Display Displays the measurements 2 Memory To set the memory settings enables memory recall and memory state selection M1 M2 M3 3 CAL Enables voltage and current calibration 4 Back Light To turn On Off the backlight 5 Lock Unlock Enables and disables the front panel operation 6 Over Voltage Enables and disables the over voltage protection function sets trip voltage and clears the over voltage condition 7 Over Current Enables and disables the over current protection function sets trip current and clears the over current condition 8 Display Limit Displays and sets the voltage and current limit values 9 Voltage Current Selects the knob control function for voltage and current adjustment 10 Output On Off Enables and disables the power supply outp
38. libration and adjustment is listed below If the exact instrument is not available substitute the calibration standards of equivalent requirement s Equipment Requirement s Recommended Model Purpose Used Digital Multimeter 8 digits resolution Agilent 3458A Measures accurate PV DMM DC voltage ct Oscilloscope Sensitivity 1 mV Agilent DS08064A or Displays transient PV Bandwidth limit 20 MHz Infiniium equivalent response Displays Probe ripple and noise 1 1 with RF tip waveform 10 1 with RF tip for gt 50 V Differential Bandwidth gt 20 MHz LeCroy DA1855A Signal conditioning PV Amplifier bandwidth limit 20 MHz preamplifiers AC coupling Amplifier x10 RMS Volt Meter 20 Hz to 20 MHz R amp S URE3 Measures RMS noise PV 50 Q Feed through Pomona Loads termination to PV Termination match output impedance of the differential amplifier AC DC Current Tektronix TCP305 amp Converts current to Converter Tektronix TCPA300 voltage Electronic Load Voltage range 30 Vdc Agilent 6060B Measures load and PV Current range 5 A line regulations and Open and Short switches transient response Transient On Off time AC Power Source Capable of supplying Agilent 6813B Functions as variable PV 90 Vac to 250 Vac voltage transformer 44 U8001A U8002A User s and Service Guide Service Guide 5 Table 5 2 List of Equipment Equipment Requirement s Recommended Model Purpose Used Resistive Load R 10 2 90 W for U8001A Meas
39. mA e U8002A Io 37 5 mA U8001A U8002A User s and Service Guide 57 5 Service Guide CC Load Effect Load Regulation This test measures the immediate change in output current resulting from a change in the load from full rated output voltage to short circuit Procedures 1 58 Power off the power supply and connect the output to be tested as shown in Figure 5 2 B with the DMM connected across the 0 01 Q current monitoring resistor Ry Power on the power supply When the power supply is in limit mode program the output voltage to maximum programmable value and output current to full rated value i e 3 A for U8001A and 5A for U8002A Enable the output Operate the electronic load in constant voltage mode and set its voltage to 30 V Ensure that the power supply is in CC mode If not adjust the electronic load so that the voltage drops slightly until the power supply is in CC mode Record the current reading by dividing the voltage reading on the DMM by the resistance of the current monitoring resistor Within a few seconds after step 6 operate the electronic load in short mode and record the current reading by dividing the voltage reading on the DMM by the resistance of the current monitoring resistor Compare the reading obtained in steps 6 and 7 The difference should be within the limit of e U8001A 2 6 mA e U8002A 3 mA U8001A U8002A User s and Service Guide Service Guide 5 CC Source Effect Lin
40. n To cancel the operation allow the unit to idle for five seconds U8001A U8002A User s and Service Guide Operations and Features 3 To disable the OCP 1 Press on the Over Current button to disable the OCP The OCP annunciator will eventually turn off To clear the over current condition 1 OCP trip can only occur when the output is enabled When the OCP condition occurs e The output is disabled and the OFF annunciator will be turned on Ifthe keylock feature was enabled it will be disabled The LOCK annuciator will be turned off e The OCP annunciator will fast blink continuously e The display will show TRIP 2 To clear the OCP trip conditon press on the Over Current button again If OCP trip persists decrease the current limit settings to clear the tripping U8001A U8002A User s and Service Guide 27 3 Operations and Features Keylock Operation This operation provides locking function for the knob and all the buttons on front panel of the equipment which allows end users to secure their desired settings The keylock is disabled by default when power up To enable keylock Lock 1 Press on the Lock Unlock button The LOCK annunciator Linio will be turned on 2 When the keylock function is enabled the knob and all the buttons are disabled EXCEPT Lock Unlock button To disable keylock 1 Press and hold down the Lock Unlock button for three seconds 2 Whe
41. n the Lock Unlock button is being held down the display will show HOLD until the keylock is disabled 3 After the keylock is disabled the LOCK annunciator will be turned off 28 U8001A U8002A User s and Service Guide Operations and Features 3 Backlight Operation This operation provides the backlight for the LCD display The backlight will be enabled by default when power up To turn on the backlight pace 1 Press on the Back Light button The backlight will be turned on To turn off the backlight i 1 Press on the Back Light button The backlight will be turned off U8001A U8002A User s and Service Guide 29 3 Operations and Features System Related Operations Reset to factory defaults To reset the power supply unit to factory defaults press and Output _On OF hold Output On Off button when power up The OVP and OCP are turned off and their values are set to maximum e The memory storage locations are cleared e The voltage and current limit values are set to zero e The calibration values are intact Power on self test A power on self test occurs automatically when the power supply unit is turned on This test ensures the unit is operational The power on self test checks for flash data memory and checks the voltage and current outputs when the unit is off If the test fails the display will show Err with the error code See Appendix A List of Error
42. onents the line voltage selection switch and the power line fuse on the rear panel 1 Remove the power cord and 2 Pull the fuse plunger to remove slide the fuse cover upwards the fuse from the fuse holder 3 Remove the voltage selector 4 Replace the correct fuse and PCB using a flat blade orientate the PCB based on the screwdriver correct voltage 40 U8001A U8002A User s and Service Guide Service Guide 5 Orientation of the Voltage Selector AC Inlet 100 V 115V 100 indication needs to be in this orientation 115 indication needs to be in this orientation 230 indication needs to be in this orientation Figure 5 1 Orientation of voltage selector AC inlet in different voltage selection U8001A U8002A User s and Service Guide 41 5 42 Service Guide FUSE FNE N FUSE FINE 4 0AT 6 25AT 100v O Line Voltage Fuse Rating indicator Line Voltage Fuse Rating indicator for U8001A for U8002A The authorised personnel will mark the fuse rating indicator printed on the rear panel each time the fuse is changed Self Test Procedures Power On Self Test Each time the power supply is powered on a set of self tests are performed These tests check that the minimum set of logic and measurement hardware are functioning properly Unit Fails Self Test Verify that the correct power line voltage setting is selected Also ensure that all terminal connections are removed while the self test is performed Please ref
43. r will be turned on e Use the knob to enter the reading obtained from the DVM e Press the Memory button to save the changes and move to the next calibration point You will be able to perform this if the power supply is in CV mode 62 U8001A U8002A User s and Service Guide Service Guide 5 4 High Voltage Calibration Point e Display will show C blinking e The M3 annunciator will be turned on e Use the knob to enter the reading obtained from the DVM e Press the Memory button to save the changes voltage calibration is done You will be able to perform this if the I power supply is in CV mode 5 Voltage Calibration e Display will show donE for a few seconds and the power supply will enter the current calibration mode If you do not wish to continue with the current calibration you may now turn off the power supply to exit the calibration mode U8001A U8002A User s and Service Guide 63 5 Service Guide Current Calibration For current calibration connect an appropriate shunt 0 01 Q across the output terminals and connect a digital voltmeter DVM across the shunt resistor Same as voltage calibration you will also be calibrating for low current middle current and high current calibration point respectively Make sure that the power supply is in constant current CC mode along the current calibration POWER SUPPLY n 1 Current Calibration mode e Display will show C blinking e The CC
44. red for this product If you wish to remove dust from the enclosure use a dry cloth U8001A U8002A User s and Service Guide General Information 2 Output Connections WARNING Before attempting to connect wires to the front output terminals make sure to turn off the power supply first to avoid damage to the circuits being connected Voltage drops The load wires must be large enough to avoid excessive voltage drops due to the impedance of the wires In general if the wires are heavy enough to carry the maximum short circuit current without overheating excessive voltage drops will not be a problem The voltage drops across the load wires should be limited to less than 2 V Refer to the American Wire Gauge AWG standard to calculate the voltage drop for some commonly used AWG wire copper U8001A U8002A User s and Service Guide 15 2 General Information 16 U8001A U8002A User s and Service Guide Agilent U8001A U8002A Single Output DC Power Supplies User s and Service Guide 3 Operations and Features Constant Voltage Operation 18 Constant Current Operation 20 Memory Operations 22 Programming Over Voltage Protection 24 Programming Over Current Protection 26 Keylock Operation 28 Backlight Operation 29 System Related Operations 30 You have now learned how to install the power supply You were also briefly introduced to the front panel keys and their functionality from previous chapter This chapter shows you the
45. resistor Ry Power on the power supply When the power supply is in limit mode program the output voltage to maximum programmable value and the current to 0A Enable the output Wait for a few seconds for the output of the power supply to settle Make sure that the power supply is in CC mode Divide the voltage drop DMM reading across the current monitoring resistor Ry by its resistance to convert to amps and record this value Ig This value should be within the limit of 0 A 20 mA When the power supply is in meter mode record the current reading displayed on the front display of the power supply This value should be within the limit of Ip 10 mA Disable the output When the power supply is in limit mode program the output current to full rated value i e 3 A for U8001A and 5 A for U8002A 10 Enable the output 11 Wait for a few seconds for the output of the power supply to settle Make sure that the power supply is in CC mode U8001A U8002A User s and Service Guide Service Guide 5 12 Divide the voltage drop DMM reading across the current monitoring resistor Ry by its resistance to convert to amps and record this value Ig This value should be within the limit of e U8001A 3 A 30 5 mA e U8002A 5 A 37 5 mA 13 When the power supply is in meter mode record the current reading displayed on the front display of the power supply This value should be within the limit of e U8001A Ip 30 5
46. ser s and Service Guide Agilent U8001A U8002A Single Output DC Power Supplies User s and Service Guide 5 Service Guide Equipment Warranty 36 Replacement Parts 38 Troubleshooting 39 Performance Verification and Calibration 43 Voltage Calibration 62 Current Calibration 64 This chapter contains service information for the U8001A U8002A single output DC power supplies including warranty information general diassemble verification steps to troubleshoot the connectivity and functionality detailed calibration procedures for your power supply related documentation and Agilent contacts It is advised that you perform the calibration test before you start using the power supply The step by step calibration procedures are simple and easy to understand It is meant for both experienced and new users ot Agilent Technologies 35 5 Service Guide Equipment Warranty Types of Service Available 36 If your instrument fails during the warranty period Agilent Technologies will replace it under the terms of your warranty After your warranty expires Agilent offers repair by unit exchange service at competitive prices Extended Service Contracts Many Agilent products are available with optional service contracts that extend the covered period after the standard warranty expires If you have such a service contract and your instrument fails during the covered period Agilent Technologies will replace it in accordance wi
47. t Record the output reading on the DMM Within a few seconds after step 7 adjust the AC voltage source to high line voltage limit and record the voltage reading on the DMM The difference between the DMM readings in steps 7 and 8 should be within the limit of 5 mV Line Voltage Low Line Voltage Limit Va High Line Voltage Limit V 100 90 110 115 104 127 230 207 253 U8001A U8002A User s and Service Guide 51 5 52 Service Guide CV Noise CV noise is specified as the RMS or peak to peak output voltage in the frequency range from 20 Hz to 20 MHz Procedures 1 Power off the power supply and connect the output to be tested as shown in Figure 5 2 C to a differential amplifier and load resistor 10 Q for U8001A and 6 Q for U8002A Power on the power supply When the display is in the limit mode program the output voltage to full rated value i e 30 V and output current to the maximum programmable value Enable the output of the power supply Make sure that the power supply is in CV mode If not adjust the resistive load so that the output current drops slightly until the power supply is in CV mode Configure the differential amplifier as follow e Set to AC mode positive and negative to removes the DC component e Set to differential mode e Set gain to x10 e Set attenuation to 1 e Set low pass filter to 20 MHz bandwidth limit to filter out input signal which contains higher frequenc
48. teps 7 and 8 The difference should be within the limit of e U8001A 2 6 mA e U8002A 3 mA Line Voltage Low Line Voltage Limit V High Line Voltage Limit V 100 90 110 115 104 127 230 207 253 U8001A U8002A User s and Service Guide Service Guide 5 CC Noise CC noise is specified as the RMS output current in a frequency range 20 Hz to 20 MHz with the power supply in constant current operation Procedures 1 Power off the power supply and connect the output to be tested as shown in Figure 5 2 D to an AC DC converter and load resistor 10 Q for U8001A and 6 for U8002A 2 Power on the power supply 3 When the display is in the limit mode program the output voltage to maximum programmable value and output current to full rated value i e 3 A for U8001A and 5 A for U8002A 4 Enable the output 5 Make sure that the power supply is in CC mode If not adjust the resistive load so that the output voltage drops slightly until the power supply is in CC mode 6 Configure the differential amplifier as follow e Set to AC mode positive and negative to removes the DC component e Set to differential mode e Set gain to x10 e Set attenuation to 1 e Set low pass filter to 20 MHz bandwidth limit to filter out input signal which contains higher frequency e Set to zero precision voltage generator e Set input impedance to 1 MQ 7 Configure the RMS voltmeter as follow e Set high pass filter to10 Hz
49. th the contract Obtaining Repair Service Worldwide To obtain service for your instrument in warranty under service contract or post warranty contact your nearest Agilent Technologies Service Center They will arrange to have your unit replaced and can provide warranty or repair cost information where applicable To obtain warranty service or technical support information you can contact Agilent Technologies at one of the following telephone numbers In the United States 800 829 4444 In Europe 31 20 547 2111 In Japan 0120 421 345 Or use our Web link for information on contacting Agilent worldwide www agilent com find assist Or contact your Agilent Technologies Representative U8001A U8002A User s and Service Guide Service Guide 5 Before shipping your instrument ask the Agilent Technologies Service Center to provide shipping instructions including what components to ship Agilent recommends that you retain the original shipping carton for use in such shipments Repackaging for Shipment If the unit is to be shipped to Agilent for service or repair be sure to e Attach a tag to the unit identifying the owner and indicating the required service or repair Include the model number and full serial number e Place the unit in its original carton with appropriate packaging material for shipping e Secure the container with strong tape or metal bands e Ifthe original shipping container is not avail
50. tputs The OFF annunciator turns off Notice that the display is in the meter mode Meter mode means that the display shows the output voltage and current limit 3 Check that the front panel voltmeter properly responds to knob control 4 Turn the knob clockwise or counter clockwise to check that the voltmeter responds to knob control and the ammeter indicates nearly zero 5 Ensure that the voltage can be adjusted from zero to the full rated value by adjusting the knob When the power supply is turned on the last memory will be shown on the display U8001A U8002A User s and Service Guide 3 1 Quick Start Current Output Checkout The following steps check basic current functions with a short across the power supply s output 1 Turn on the power supply Make sure that the output is disabled The OFF annunciator is on Connect a short across and output terminals with an insulated test lead Use a wire size sufficient to handle the maximum current refer to the American Wire Gauge standard Enable the output The CV or CC annunciator turns on depending on the resistance of the test lead Notice that the display is in the meter mode Adjust the voltage limit value to 1 0 volt Set the display to the limit mode Adjust the voltage limit to 1 0 V to assure CC operation The CC annunciator will be turned on To go back to normal mode press the key again or let the display time out after several seconds
51. ures ripple and PV 60 150 W for U8002A noise Current Monitoring 0 010Q 0 1 ISOTEK Co Current monitoring PV Resistor Shunt TCR less than 20 ppm C Model A H resistor c Rm PV Performance Verification t C Calibration Test Consideration For optimum performance all procedures should comply with the following recommendations e Assure that the calibration ambient temperature is stable and between 20 C and 30 C Ideally the calibration should be performed at 25 C 1 C e Assure ambient relative humidity is less than 80 e Allow one hour warm up period by power on the power supply During warm up period set the power supply to maximum programmable voltage and current Then enable the output Keep the test setup connection cables as short as possible U8001A U8002A User s and Service Guide 45 5 Service Guide Measurement Techniques Test Setup Most tests are performed at the front terminals as shown below Measure the DC voltage directly at the positive and negative terminals on the front panel DC voltmeter Current or scope shunt Load Resistor Load Resistor AC DC Converter fs ne F ST Bni J BNC P Differential amplifier termination output cp Differential amplifier output BNC lt p 500 termination BNC 500 termination RMS Voltmeter RMS Voltmeter Figure 5 2 Test Setups 46 U8001A U8002A User s and Service Guide
52. ut 11 Knob Increases and decreases the value of the flashing digit 12 Power On Off To turn On Off the power supply 13 Binding posts Positive negative and ground binding posts for wire connections U8001A U8002A User s and Service Guide General Information 2 Rear Panel at a Glance Cons SERIAL NO J OP Y N10149 Ge x ISM 1 A Ranna aoar 100v CI 40 47 63Hz msv CI sova zoar zov CI WARNING NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO SERVICE TRAINED PERSONNEL FOR CONTINUED FIRE PROTECTION USE SPECIFIED LINE FUSE Panels Functions 1 AC inlet Connects AC power line 2 Power fuse holder Sets the line voltage to the proper values for different country based assembly 3 Power line module Combination of the AC inlet and power fuse holder assembly 4 Physical lock mechanism Enables physical lock mechanism 5 Line Voltage Fuse Rating Indicates the line voltage and line fuse rating indicator U8001A U8002A User s and Service Guide 9 2 General Information Display Annunciators 10 Memory State 3 Memory State 2 Memory State 1 Over voltage Protection Over current Prote
53. wer supply is in CV mode If not adjust the electronic load so that the current drops slightly until the power supply is in CV mode Record the reading on the DMM Within a few seconds after step 6 operate the electronic load in open mode and record the reading on the DMM Compare the reading obtained in steps 5 and 6 The difference should be within the limit of 5 mV U8001A U8002A User s and Service Guide Service Guide 5 CV Source Effect Line Regulation This test measures the change in output voltage that results from a change in AC line voltage from the minimum value to maximum value Procedures 1 N Aa o co Power off the power supply and connect a DMM between the and terminals of the output to be tested as shown in Figure 5 2 A Connect the AC power line through an AC voltage source Adjust the AC voltage source to provide nominal input voltage to the power supply Power on the power supply When the display is in the limit mode program the output voltage to full rated value i e 30 V and output current to the maximum programmable value Enable the output Operate the electronic load in constant current mode and set its current to 3 A for U8001A and 5 A for U8002A Ensure that the power supply is in CV mode If not adjust the electronic load so that the output current drops slightly until the power supply is in CV mode Adjust the AC voltage source to low line voltage limi
54. y e Set to zero precision voltage generator e Set input impedance to 1 MQ Configure the scope as follow e Set time range to 50 ms 20 Hz e Acquires every single sample at the maximum sampling rate and retains only the min and max values ina sampling region 50 ms time range e Enable 20 MHz cut off frequency for better high frequency cut off e AC coupling U8001A U8002A User s and Service Guide Service Guide 5 e Enable Auto triggering 8 Allow the scope run for a few seconds to generate enough measurement points 9 Obtain the maximum peak to peak voltage measurement as indicated in the scope Divide this value by 10 to get the CV peak to peak noise measurement The result should not exceed 12 MVpp 10 Configure the RMS voltmeter as below e Set high pass filter to10 Hz e AC coupling 11 Disconnect the oscilloscope and connect an RMS voltmeter in its place Do not disconnect the 50 termination Divide the reading of the RMS voltmeter by 10 The result should not exceed the RMS limits of 1 mVpyg U8001A U8002A User s and Service Guide 53 5 54 Service Guide Load Transient Response Time This test measures the time for the output voltage to recover to within 15 mV of nominal output voltage following a load change from full load to half load or vice versa Procedures 1 Power off the power supply and connect the output to be tested as shown in Figure 5 2 A with an oscilloscope Operate the

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