Fluke 5725A User Manual

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Summary of Contents

Page 1 - Instruction Manual

®5725AAmplifierInstruction ManualPN 823435January 1989Rev. 7, 6/02© 1993, 1996, 2002 Fluke Corporation, All rights reserved. Printed in U.S.A.All prod

Page 2

5725AInstruction Manualviii

Page 3 - Table of Contents

5725AInstruction Manual4-30to approximately 33Ω/°C by R615. Op amp U603A provides a reference voltage ofabout -0.77V. This reference voltage is applie

Page 4

Theory of OperationDetailed Circuit Description44-31aq21f.epsFigure 4-5. High Voltage Sense Assembly Block Diagram

Page 5 - Contents

5725AInstruction Manual4-32• Serial Interface/Guard Crossing SectionThe serial interface/guard crossing section consists of an RS-232 interface integ

Page 6

Theory of OperationDetailed Circuit Description44-33VR105 reduce apparent supply voltage seen by U102. Transistors Q105 and Q106 alongwith R131/C117 a

Page 7 - List of Tables

5725AInstruction Manual4-34latch up by eliminating positive feedback resulting from positive output voltages fromU100. Op amp U105 is simply a low-noi

Page 8

Theory of OperationDetailed Circuit Description44-35IC U156 is a dac whose digital input is under microprocessor control via data latchU155. The +15V

Page 9 - List of Figures

5725AInstruction Manual4-36Relays K102 and K103 provide switching that allows direct drive of the sense amplifierand its calibration circuitry by the

Page 10

Theory of OperationDetailed Circuit Description44-374-60. AC Line Voltage Selection SectionIn addition to the primary power switch, S401, this sectio

Page 11 - Interference Information

5725AInstruction Manual4-38

Page 12

5-1Chapter 5Calibration and VerificationTitle Page5-1. Introduction...

Page 13 - OPERATOR SAFETY

Interference InformationThis equipment generates and uses radio frequency energy and if not installed and used in strictaccordance with the manufactur

Page 14

5725AInstruction Manual5-2

Page 15 - SERVICING SAFETY

Calibration and VerificationIntroduction55-35-1. IntroductionThe 5725A is calibrated at the factory before shipping. Calibration is traceable to theU.

Page 16 - ELECTRIC SHOCK

5725AInstruction Manual5-4

Page 17 - Chapter 1

Some semiconductors and custom IC's can bedamaged by electrostatic discharge duringhandling. This notice explains how you canminimize the chances

Page 18

5. USE STATIC SHIELDING CONTAINERS FOR HANDLING AND TRANSPORT.6. DO NOT SLIDE S.S. DEVICES OVER ANY SURFACE.7. AVOID PLASTIC,VINYL AND STYROFOAM

Page 19 - 1-1. Introduction

6-1Chapter 6MaintenanceTitle Page6-1. Introduction ... 6-36-2.

Page 20 - 1-2. Where to Go From Here

5725AInstruction Manual6-2

Page 21 - 1-3. How to Use the Manuals

MaintenanceIntroduction66-3WarningServicing described in this section is to be done by qualifiedservice personnel only. To avoid electrical shock, do

Page 22 - 1-11. Specifications

5725AInstruction Manual6-4100V110V115V120VS2 S3 S4VOLTAGESELECTIONFUSEF8A 250V(FAST)200V220V230V240VS2 S3 S4F4A 250V(FAST)JOHN FLUKE MFG. CO., INC.MAD

Page 23 - DC Voltage Specifications

MaintenanceGeneral Cleaning66-5aq14f.epsFigure 6-2. Accessing the Air Filter6-4. General CleaningTo keep the 5725A looking like new, clean the case, f

Page 25

5725AInstruction Manual6-66-6. Access ProceduresFigure 6-3 shows the location of all major modules in the 5725A. View A is a top view,and view B is a

Page 26

MaintenanceAccess Procedures66-7WarningFollow the instructions under "Initial Access Procedure" tomake sure high voltage has been bled off b

Page 27 - AC Voltage Specifications

5725AInstruction Manual6-8CURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OFFPOWER11AMAX2OVPKMAXLEDCR317TP301FRONT PANELTP307TP304LEDCR318HIGH VOLTAGEAMPL

Page 28

MaintenanceAccess Procedures66-98. Take another DMM reading with the common lead to TP307 and the high lead toTP304 on the Power Supply assembly. Thi

Page 29

5725AInstruction Manual6-10 CAUTIONWHEN REINSTALLING DIGITAL ASSEMBLY,PULL RIBBON CABLE SLACK COMPLETELYINTO CHASSIS. aq17

Page 30

MaintenanceAccess Procedures66-114. If you want to completely remove the Digital assembly, remove the ribbon cable byreleasing the catches on the boa

Page 31

5725AInstruction Manual6-12CURRENTAMPLIFIER(A2)BRIDGERECTIFIERHEAT SINKDRESS CABLESAS SHOWNaq18f.epsFigure 6-6. Correct Way to Dress Cables6-11. Acce

Page 32

MaintenanceAccess Procedures66-136-12. Accessing the High Voltage Sense Assembly (A6)WarningTo avoid electrical shock, do not proceed with the follow

Page 33 - Resistance Specifications

5725AInstruction Manual6-146-13. Accessing the High Voltage Output TransistorsWarningDuring normal operation, the high voltage heat sinks are atletha

Page 34

MaintenanceEnabling Front or Rear Binding Posts66-156. Turn over the 5725A so that the top is facing up.7. Remove the high voltage heat sink assembl

Page 35 - - I)/( I

OPERATOR SAFETYSUMMARYWARNINGHIGH VOLTAGEis used in the operation of this equipmentLETHAL VOLTAGEmay be present on the terminals, observe all safety p

Page 36

5725AInstruction Manual6-16J222FRONT OUTPUTCABLEREAR OUTPUTCABLECURRENTAMPLIFIER(A2)SECURE UNUSEDCABLEaq23f.epsFigure 6-7. Enabling Front or Rear Bind

Page 37 - DC Current Specifications

7-1Chapter 7TroubleshootingTitle Page7-1. Introduction ... 7-37

Page 38 - 0.1 x actual load

5725AInstruction Manual7-2

Page 39 - AC Current Specifications

TroubleshootingIntroduction77-37-1. IntroductionThis section provides troubleshooting information in three parts. First a listing of all5725A fault co

Page 40

5725AInstruction Manual7-4Table 7-1. 5725A Fault CodesFAULTNO.MESSAGE EXPLANATION201 5725 Self-Test ROM Failure Requires service202 5725 Self-Test RAM

Page 41

TroubleshootingSelf Diagnostics77-5Table 7-1. 5725A Fault Codes (cont)FAULTNO.MESSAGE EXPLANATION228 5725 Software TRAP 229 5725 Cable Was Off 230 5

Page 42

5725AInstruction Manual7-67-4. Manual Tests for Fault IsolationWarningThe following servicing is to be done by qualified servicepersonnel only. To av

Page 43

TroubleshootingManual Tests for Fault Isolation77-77-5. Problems 1 or 2: Fault at Power-Up or When Entering VoltageStandbyProceed as follows to isola

Page 44

5725AInstruction Manual7-87-6. Problem 3: Fault When Entering Voltage OperateProceed as follows to isolate the problem in this condition:1. Suspect

Page 45 - 1-18. General Specifications

TroubleshootingTesting the Power Supply By Itself77-93. Remove plug P301 from J301 and inserting it into J303. Now the high voltage powersupply will

Page 46

Symbols Marked on EquipmentDANGER — High VoltageProtective ground (earth) terminalAttention — refer to the manual. This symbol indicates that informat

Page 47 - Installation

5725AInstruction Manual7-10

Page 48

8-1Chapter 8List of Replaceable PartsTitle Page8-1. Introduction...

Page 49 - 2-1. Introduction

5725AInstruction Manual8-2

Page 50 - LC-5 LC-6 LC-7

List of Replaceable PartsIntroduction88-38-1. IntroductionThis chapter contains an illustrated list of replaceable parts for the 7-300, 7-600, 12B, an

Page 51 - 2-5. Cooling Considerations

5725AInstruction Manual8-4Note This instrument may contain a Nickel-Cadmium battery. Do not mix withthe sold waste stream. Spent batteries should be d

Page 52

List of Replaceable PartsParts Lists88-5Table 8-2. Final Assembly (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesH437 SCREW,PH,P,LOCK,S

Page 53 - 2-7. Selecting Line Voltage

5725AInstruction Manual8-6Table 8-2. Final Assembly (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesTM1 5725 INSTRUCTION MANUAL 823435 1

Page 54 - 2-8. Accessing the Fuse

List of Replaceable PartsParts Lists88-7aq24f.tifFigure 8-1. Final Assembly

Page 55 - Connecting to Line Power

5725AInstruction Manual8-8aq25f.tifFigure 8-1. Final Assembly (cont)

Page 56

List of Replaceable PartsParts Lists88-9aq26f.tifFigure 8-1. Final Assembly (cont)

Page 57 - Operating Notes

SERVICING SAFETYSUMMARYFOR QUALIFIED SERVICEPERSONNEL ONLYAlso refer to the preceding Operator Safety SummaryDo Not Service AloneDo not perform intern

Page 58

5725AInstruction Manual8-10aq27f.tifFigure 8-1. Final Assembly (cont)

Page 59 - 3-1. Introduction

List of Replaceable PartsParts Lists88-11aq28f.tifFigure 8-1. Final Assembly (cont)

Page 60 - 3-2. Front Panel Features

5725AInstruction Manual8-12aq29f.tifFigure 8-1. Final Assembly (cont)

Page 61 - Rear Panel Features

List of Replaceable PartsParts Lists88-13aq30f.tifFigure 8-1. Final Assembly (cont)

Page 62 - 3-3. Rear Panel Features

5725AInstruction Manual8-14aq31f.tifFigure 8-1. Final Assembly (cont)

Page 63

List of Replaceable PartsParts Lists88-15Table 8-3. A1 Interconnect PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesCR1,CR13-15 * DIODE,SI,

Page 64 - 3-5. Warm Up

5725AInstruction Manual8-165725A-1611aq36f.epsFigure 8-2. A1 Interconnect PCA

Page 65 - 3-7. Standby

List of Replaceable PartsParts Lists88-17Table 8-4. A2 Current Amplifier PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC201,C202,C207,C20

Page 66 - 3-8. Voltage Standby

5725AInstruction Manual8-18Table 8-4. A2 Current Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesMP2 INSULATOR, CURRENT 85

Page 67 - 3-9. Current Standby

List of Replaceable PartsParts Lists88-19Table 8-4. A2 Current Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR233,R237,R

Page 68 - 3-10. Voltage Operate

FIRST AID FORELECTRIC SHOCKFree the Victim From the Live ConductorShut off high voltage at once and ground the circuit. If high voltage cannot be turn

Page 69 - 3-11. Current Operate

5725AInstruction Manual8-205725A-1650aq37f.epsFigure 8-3. A2 Current Amplifier PCA

Page 70

List of Replaceable PartsParts Lists88-21Table 8-5. A3 High Voltage Amplifier PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC601 CAP,POLY

Page 71

5725AInstruction Manual8-22Table 8-5. A3 High Voltage Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesQ601 * TRANSISTOR,SI

Page 72

List of Replaceable PartsParts Lists88-23Table 8-5. A3 High Voltage Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR640,R

Page 73 - 4-1. Introduction

5725AInstruction Manual8-245725A-1661aq38f.epsFigure 8-4. A3 High Voltage Amplifier PCA

Page 74

List of Replaceable PartsParts Lists88-25Table 8-6. A4 Power Supply PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC301,C302,C321,C322CAP,

Page 75

5725AInstruction Manual8-26Table 8-6. A4 Power Supply PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesMP310 AIDE,PCB PULL 541730 2MP

Page 76

List of Replaceable PartsParts Lists88-27Table 8-6. A4 Power Supply PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR351 RES,CF,1K,+

Page 77 - 4-9. Current Standby

5725AInstruction Manual8-285725A-1631aq39f.epsFigure 8-5. A4 Power Supply PCA

Page 78

List of Replaceable PartsParts Lists88-29Table 8-7. A5 Digital PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC501,C503-511,C516,C518,C519

Page 79

1-1Chapter 1Introduction and SpecificationsTitle Page1-1. Introduction ...

Page 80

5725AInstruction Manual8-305725A-1650aq40f.epsFigure 8-6. A5 Digital PCA

Page 81

List of Replaceable PartsParts Lists88-31Table 8-8. A6 High Voltage Sense PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC98,C99 CAP,CER,4

Page 82

5725AInstruction Manual8-32Table 8-8. A6 High Voltage Sense PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesJ403 HEADER,1 ROW,.156CT

Page 83

List of Replaceable PartsParts Lists88-33Table 8-8. A6 High Voltage Sense PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR154 RES,M

Page 84 - 4-18. Switching Section

5725AInstruction Manual8-345725A-1601aq41f.epsFigure 8-7. A6 High Voltage Sense PCA

Page 85 - 4-20. System Supply Section

List of Replaceable PartsParts Lists88-35Table 8-9. A12 Transformer Enclosure AssemblyReferenceDesignatorDescriptionFluke StockNoTot Qty NotesH1 SCREW

Page 86 - 4-25. External ROM

5725AInstruction Manual8-36aq32f.tifFigure 8-8. A12 Transformer Enclosure Assembly

Page 87

List of Replaceable PartsParts Lists88-37aq33f.tifFigure 8-8. A12 Transformer Enclosure Assembly (cont)

Page 88 - 4-30. Optoisolator Link

5725AInstruction Manual8-38aq34f.tifFigure 8-8. A12 Transformer Enclosure Assembly (cont)

Page 89 - 4-33. Watchdog Timer

List of Replaceable PartsParts Lists88-39aq35f.tifFigure 8-8. A12 Transformer Enclosure Assembly (cont)

Page 90

5725AInstruction Manual1-2

Page 91 - 4-35. Error Amplifier Section

5725AInstruction Manual8-40Table 8-10. A30 Inductor PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesJ1 CONN,MATE-N-LOK,HEADER,4 PIN 512269

Page 92 - 4-37. Monitor Section

9-1Chapter 9Schematic DiagramsFigure No. Title Page9-1. A1 Interconnect PCA... 9-

Page 93 - 4-39. Power Supply Section

5725AInstruction Manual9-2

Page 94 - 4-41. Input Amplifier

Schematic Diagrams9-39Figure 9-1. A1 Interconnect PCA5725A-1611aq48f.eps

Page 95

5725AInstruction Manual9-4Figure 9-1. A1 Interconnect PCA (cont)

Page 96 - 4-44. Input Clamp

Schematic Diagrams9-59Figure 9-1. A1 Interconnect PCA (cont)

Page 97 - 4-47. Midstage -400V Filter

5725AInstruction Manual9-6Figure 9-2. A2 Current Amplifier PCA5725A-1650aq52f.eps

Page 98 - 4-50. Autobias Sense Circuit

Schematic Diagrams9-79Figure 9-2. A2 Current Amplifier PCA (cont)

Page 99 - 4-53. Temperature Monitoring

5725AInstruction Manual9-8Figure 9-2. A2 Current Amplifier PCA (cont)

Page 100

Schematic Diagrams9-99Figure 9-2. A2 Current Amplifier PCA (cont)

Page 101 - Detailed Circuit Description

Introduction and SpecificationsIntroduction11-31-1. IntroductionThe Fluke 5725A Amplifier enhances the 5700A Calibrator in the ac voltage, ac current,

Page 102 - 4-55. Sense Amplifier Section

5725AInstruction Manual9-10Figure 9-3. A3 High Voltage Amplifier PCA5725A-1661aq56f.eps

Page 103

Schematic Diagrams9-119Figure 9-3. A3 High Voltage Amplifier PCA (cont)

Page 104 - 4-56. Analog Monitor Section

5725AInstruction Manual9-12Figure 9-3. A3 High Voltage Amplifier PCA (cont)

Page 105

Schematic Diagrams9-139Figure 9-4. A4 Power Supply PCA5725A-1631aq59f.eps

Page 106 - 4-59. Control Section

5725AInstruction Manual9-14Figure 9-4. A4 Power Supply PCA (cont)

Page 107

Schematic Diagrams9-159Figure 9-4. A4 Power Supply PCA (cont)

Page 108

5725AInstruction Manual9-16Figure 9-5. A5 Digital PCAaq62f.eps5725A-1650aq43f.eps100901002 V10 msTYPICAL COMMUNICATIONS ACTIVITYAT PINS 12 AND 13 OF U

Page 109 - Calibration and Verification

Schematic Diagrams9-179Figure 9-5. A5 Digital PCA (cont)

Page 110

5725AInstruction Manual9-18Figure 9-6. A6 High Voltage Sense PCA100901001 V10 ms100901001 V10 msVOLTAGE STANDBYSTANDBY100901001 V10 msCURRENT STANDBYA

Page 111 - 5-1. Introduction

Schematic Diagrams9-199Figure 9-6. A6 High Voltage Sense PCA (cont)

Page 112

LIMITED WARRANTY AND LIMITATION OF LIABILITYEach Fluke product is warranted to be free from defects in material and workmanship under normal use andse

Page 113 - Fluke Corporation

5725AInstruction Manual1-41-2. Where to Go From HereThis manual is the operator and service manual for the 5725A. However, because the5725A operates

Page 114 - PORTIONS REPRINTED

5725AInstruction Manual9-20Figure 9-6. A6 High Voltage Sense PCA (cont)

Page 115 - Maintenance

Schematic Diagrams9-219Figure 9-6. A6 High Voltage Sense PCA (cont)

Page 116

5725AInstruction Manual9-22Figure 9-6. A6 High Voltage Sense PCA (cont)

Page 117 - 6-2. Replacing the Fuse

Schematic Diagrams99-23aq45f.epsFigure 9-7. A12 Transformer Enclosure Assembly

Page 118 - 6-3. Cleaning the Air Filter

5725AInstruction Manual9-24

Page 119 - 6-5. Cleaning PCA’s

1Index—5—5700ACALIBRATOR connector, 2-6, 3-7Connecting to, 2-65725A STANDBY indicator, 3-5—A—A1. See Interconnect assemblyA2. See Current Amplifier as

Page 120 - 6-6. Access Procedures

5725AInstruction Manual2PCAs, 6-5Clearance requirements, 2-5Communication, 5700A and 5725A, 4-8Connectors, (also see binding posts, Terminals), 3-5570

Page 121 - Access Procedures

Index (continued)3POWER switch, 3-5Problems, 2-5, 7-3—R—Rack mounting, 2-5Rear panel features, 3-6Remote control, 3-3Replacing the fuse, 6-3—S—Selecti

Page 122

5725AInstruction Manual4

Page 123

Introduction and SpecificationsHow to Use the Manuals11-51-3. How to Use the ManualsThe following paragraphs describe how each manual addresses the 5

Page 124

5725AInstruction Manual1-61-9. 5700A/5720A Series II Remote Programming Reference GuideThe 5700A/5720A Series II Remote Programming Reference Guide c

Page 125

Introduction and SpecificationsDC Voltage Specifications11-71-12. DC Voltage SpecificationsTable 1-1. 5720A Series II DC Voltage Specifications: 99 %

Page 126

5725AInstruction Manual1-8Table 1-2. 5700A Series II DC Voltage Specifications: 99 % and 95 % Confidence Levels5700A99% 99 % Confidence LevelRange Re

Page 127

Introduction and SpecificationsDC Voltage Specifications11-9Table 1-3. DC Voltage Secondary Performance Specifications and Operating CharacteristicsTe

Page 128

5725AInstruction Manual1-101-13. AC Voltage SpecificationsTable 1-4. 5720A Series II AC Voltage Specifications: 99 % Confidence Level5720A99% 99 % Co

Page 129

Introduction and SpecificationsAC Voltage Specifications11-11Table 1-5. 5720A Series II AC Voltage Specifications: 95 % Confidence Level5720A95% 95 %

Page 130

5725AInstruction Manual1-12Table 1-6. 5700A Series II AC Voltage Specifications: 99 % Confidence Level5700A99% 99 % Confidence LevelRange Resolution

Page 131 - Troubleshooting

Introduction and SpecificationsAC Voltage Specifications11-13Table 1-7. 5700A Series II AC Voltage Specifications: 95 % Confidence Level5700A95% 95%

Page 132

iTable of ContentsChapter Title Page1 Introduction and Specifications... 1-11-1. Introduction ...

Page 133 - 7-3. Self Diagnostics

5725AInstruction Manual1-14Table 1-8. AC Voltage Secondary Performance Specifications and Operating CharacteristicsStability± 1 °C [Note 1]Temperatur

Page 134

Introduction and SpecificationsAC Voltage Specifications11-15Table 1-8. AC Voltage Secondary Performance and Operating Characteristics (continued)5725

Page 135 - Requires service

5725AInstruction Manual1-161-14. Resistance SpecificationsTable 1-9. 5720A Series II Resistance Specifications: 99 % and 95 % Confidence Levels5720A99

Page 136

Introduction and SpecificationsResistance Specifications11-17Table 1-10. 5700A Series II Resistance Specifications: 99 % and 95 % Confidence Levels570

Page 137

5725AInstruction Manual1-18Table 1-11. Resistance Secondary Performance Specifications and Operating CharacteristicsNominalValueStability ±1 °C[Note 1

Page 138 - Warning

Introduction and SpecificationsResistance Specifications11-19Table 1-12. Current Derating FactorsNominal Value Value of Derating Factor K for Over or

Page 139

5725AInstruction Manual1-201-15. DC Current SpecificationsTable 1-13. 5720A Series II DC Current Specifications: 99 % and 95 % Confidence Levels5720A9

Page 140

Introduction and SpecificationsDC Current Specifications11-21Table 1-14. 5700A Series II DC Current Specifications: 99 % and 95 % Confidence Levels570

Page 141 - List of Replaceable Parts

5725AInstruction Manual1-22Table 1-15. DC Current Secondary Performance Specifications and Operating CharacteristicsTemperatureCoefficient [Note 2]Noi

Page 142

Introduction and SpecificationsAC Current Specifications11-231-16. AC Current SpecificationsTable 1-16. 5720A Series II AC Current Specifications: 99

Page 143 - 8-5. Service Centers

5725AInstruction Manualii3-3. Rear Panel Features... 3-63-4. Turning on the

Page 144 - 8-6. Parts Lists

5725AInstruction Manual1-24Table 1-17. 5720A Series II AC Current Specifications: 95 % Confidence Level5720A95% 95 % Confidence LevelRange Resolution

Page 145 - Parts Lists

Introduction and SpecificationsAC Current Specifications11-25Table 1-18. 5700A Series II AC Current Specifications: 99 % Confidence Level5700A99% 99

Page 146

5725AInstruction Manual1-26Table 1-19. 5700A Series II AC Current Specifications: 95 % Confidence Level5700A95% 95 % Confidence LevelRange Resolution

Page 147

Introduction and SpecificationsAC Current Specifications11-27Table 1-20. AC Current Secondary Performance Specifications and Operating Characteristics

Page 148

5725AInstruction Manual1-281-17. Wideband AC Voltage (Option 5700-03) SpecificationsTable 1-21. Wideband AC Voltage (Option 5700-03) SpecificationsSpe

Page 149

Introduction and SpecificationsGeneral Specifications11-291-18. General SpecificationsWarm-Up Time: Twice the time since last warmed up, to a maximum

Page 150

5725AInstruction Manual1-301-19. Auxiliary Amplifier SpecificationsFor complete specifications, see the 5205A and 5220A Operators Manuals.5205A (220V

Page 151

2-1Chapter 2InstallationTitle Page2-1. Introduction ... 2-32-2.

Page 152

5725AInstruction Manual2-2

Page 153

InstallationIntroduction22-3WarningThe 5725A amplifier is capable of supplying lethal voltages. Donot touch the 5700A output terminals. Read this sect

Page 154

Contents (continued)iii4-43. Window Comparator ... 4-264-44. Input Clamp ...

Page 155

5725AInstruction Manual2-4Table 2-2. Line Power Cord Types Available from FlukeTYPE VOLTAGE/CURRENT FLUKE OPTION NUMBERNorth America 120V/15A LC-1Nort

Page 156

InstallationService Information22-52-3. Service InformationEach 5725A Amplifier is warranted to the original purchaser for a period of one yearbeginni

Page 157

5725AInstruction Manual2-62-6. Connecting to the 5700A CalibratorProceed as follows to connect the 5725A to the 5700A:1. Turn the power off for both

Page 158

InstallationSelecting Line Voltage22-72-7. Selecting Line VoltageThe 5725A arrives from the factory configured for the line voltage normally appropri

Page 159

5725AInstruction Manual2-82-8. Accessing the FuseCautionTo prevent instrument damage, verify that the correct fuse isinstalled for the line voltage s

Page 160

InstallationConnecting to Line Power22-92-9. Connecting to Line PowerWarningTo avoid shock hazard, connect the factory-supplied, three-conductor line

Page 161

5725AInstruction Manual2-10

Page 162

3-1Chapter 3Operating NotesTitle Page3-1. Introduction ... 3-33

Page 163

5725AInstruction Manual3-2

Page 164

Operating NotesIntroduction33-33-1. IntroductionThis section provides setup and operation information for the 5725A Amplifier. Thissection begins with

Page 165

5725AInstruction Manualiv8 List of Replaceable Parts ... 8-18-1. Introduction ...

Page 166

5725AInstruction Manual3-43-2. Front Panel FeaturesFront panel features are called out in Figure 3-1. Each front panel feature is described inTable 3

Page 167

Operating NotesRear Panel Features33-5Table 3-1. Front Panel FeaturesA CURRENT OUTPUT Binding PostsThe source of all amplified current if the 5725A i

Page 168

5725AInstruction Manual3-63-3. Rear Panel FeaturesRear panel features are called out in Figure 3-2. Each rear panel feature is brieflydescribed in Ta

Page 169

Operating NotesTurning on the 5725A Amplifier33-7Table 3-2. Rear Panel FeaturesA CURRENT OUTPUT Binding PostsThe source of all amplified current if t

Page 170

5725AInstruction Manual3-83-4. Turning on the 5725A AmplifierWarningTo avoid electric shock, make sure the 5725A is safelygrounded as described in se

Page 171

Operating Notes5725A Operating Functions and Modes33-93-6. 5725A Operating Functions and ModesWarningBoth the 5700A and 5725A can produce fatal volta

Page 172

5725AInstruction Manual3-103-8. Voltage StandbyNOOUTPUTCURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OFF11AMAX2OVPKMAXNO OU

Page 173

Operating Notes5725A Operating Functions and Modes33-113-9. Current StandbyCURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OF

Page 174 - 5725A-1601

5725AInstruction Manual3-123-10. Voltage OperateCURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OFF11AMAX2OVPKMAXNO OUTPUTHI

Page 175

Operating NotesConditions That Activate the 5725A33-133-11. Current OperateCURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE O

Page 176

vList of TablesTable Title Page1-1. 5720A Series II DC Voltage Specifications: 99 % and 95 % Confidence Levels 1-71-2. 5700A Series II DC Voltage Spec

Page 177

5725AInstruction Manual3-143-12. Conditions That Activate the 5725AWhen the 5725A is connected to the 5700A, and is selected as the amplifier for thea

Page 178

4-1Chapter 4Theory of OperationTitle Page4-1. Introduction ...

Page 179

5725AInstruction Manual4-24-30. Optoisolator Link... 4-184-31. Break-Detect Circ

Page 180 - 5725A-1603

Theory of OperationIntroduction44-34-1. IntroductionThis section presents theory of operation in increasing level of detail. The 5725AAmplifier is fir

Page 181 - Schematic Diagrams

5725AInstruction Manual4-4Figure 4-1. 5725A Overall Block Diagram

Page 182

Theory of OperationOverall Functional Description44-5• 11A DC Function:The 11A dc function is implemented with a transconductance (voltage in/current

Page 183

5725AInstruction Manual4-6The 5700A/5725A system uses the following method for ac amplitude control:1. An rms thermal sensor alternately measures two

Page 184

Theory of OperationOverall Functional Description44-74-5. Operation in the 11A DC RangeFor the dc current function, the 5700A is configured for the d

Page 185

5725AInstruction Manual4-84-10. How the 5700A and 5725A CommunicateThe 5725A and 5700A maintain all analog and digital communication over an external

Page 186

Theory of OperationOverall Functional Description44-94-12. Description of the In-Guard LinesThe following list describes the 11 5725A in-guard lines:

Page 187

5725AInstruction Manualvi7-2. Analog Monitor Faults... 7-78-1.

Page 188

5725AInstruction Manual4-10Inside the 5725A, B-SENSE LO is buffered by the 5725A, with the equivalentvoltage called MCOM.• B-FEEDBACKDuring ac voltag

Page 189

Theory of OperationDetailed Circuit Description44-11• High Voltage Power Amplifier Assembly (A3)• Power amplifier• Harness to heat sink and its hig

Page 190

5725AInstruction Manual4-124-16. Power Supply Assembly (A4)The Power Supply assembly (A4) provides regulated system supplies for all 5725Aassemblies

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Theory of OperationDetailed Circuit Description44-134-17. High Voltage Supply SectionThe high voltage supply allows normal operation from a pair of n

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5725AInstruction Manual4-144-18. Switching SectionMOSFETs Q301/Q317 and Q302/Q318 (each in parallel) are series-switch elements forthe +400V supply. S

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Theory of OperationDetailed Circuit Description44-154-19. Current-Limit SectionResistors R313 and R329 are current shunts for the high voltage supplie

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5725AInstruction Manual4-164-21. Fan Supply SectionThe fan supply uses the same transformer secondary windings as the ±15 and ±20Vsupplies. Its own f

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Theory of OperationDetailed Circuit Description44-17aq19f.epsFigure 4-2. Digital Assembly Block Diagram

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5725AInstruction Manual4-184-26. EEROMA 2Kb X 8 EEROM (U512) stores 5725A calibration constants plus the date andtemperature of calibration. If the re

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Theory of OperationDetailed Circuit Description44-194-31. Break-Detect CircuitryThe 6303Y divides the 4.9152-MHz crystal frequency by four to create

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viiList of FiguresFigure Title Page1-1. Volt-Hertz Capability...

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5725AInstruction Manual4-20aq20f.epsFigure 4-3. Current Amplifier Assembly Block Diagram

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Theory of OperationDetailed Circuit Description44-21• Error Amplifier SectionThe error amplifier section contains three differential amplifiers and a

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5725AInstruction Manual4-22(ICAL, TP208) with the same amplitude and polarity as the current amplifier input voltage.The calibration amplifier output

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Theory of OperationDetailed Circuit Description44-234-38. Control and Switching SectionRefer to page 2 of the Current Amplifier schematic. Relays K20

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5725AInstruction Manual4-244-40. High Voltage Amplifier (A3)The High Voltage Amplifier assembly, operating with the step-up signal transformers,const

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Theory of OperationDetailed Circuit Description44-25aq22f.epsFigure 4-4. High Voltage Amplifier Assembly Block Diagram

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5725AInstruction Manual4-264-42. IntegratorOp amp U601A is configured as an integrator to reduce the output offset of the inputamplifier circuit. This

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Theory of OperationDetailed Circuit Description44-274-45. Transconductance and Cascode StageThe output voltage of the input amplifier U602, LVAMP, is

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5725AInstruction Manual4-28compensate for the capacitance seen at the gates of the power MOSFETs on the #1 heatsink assemblies. Their sources establis

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Theory of OperationDetailed Circuit Description44-29Op amp U606B senses the -400V supply and forces the autobias to the minimum biascondition when the

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