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Fluke 5725A Accessing the High Voltage Amplifier A3, 6.Correct Way to Dress Cables

Models: 5725A

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Page 126

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5725A

Instruction Manual

CURRENT

AMPLIFIER

(A2)

BRIDGE

RECTIFIER

HEAT SINK

DRESS CABLES

AS SHOWN

aq18f.eps

Figure 6-6. Correct Way to Dress Cables

6-11. Accessing the High Voltage Amplifier (A3)

The High Voltage Amplifier assembly lays flat on the top of the instrument, toward the front. To access the High Voltage Amplifier assembly, simply do the Initial Access Procedure. This leaves the assembly in the service position.

Note

When reinstalling the assembly, lower it into place squarely to make sure its connector seats correctly in the Interconnect assembly connector.

6-12

Page 126

Image 126

Fluke 5725A instruction manual Accessing the High Voltage Amplifier A3, 6.Correct Way to Dress Cables

Contents

5725A Instruction ManualAmplifier LIMITED WARRANTY AND LIMITATION OF LIABILITY Table of Contents 5725A Theory of OperationMaintenance TroubleshootingCalibration and Verification Service Centers Schematic DiagramsHow to Obtain Parts Parts ListsList of Tables TableTitle 5725A 8-15List of Figures FigureTitle 5725A viiiInstruction Manual Interference Information Declaration of the Manufacturer or ImporterBescheinigung des Herstellers/Importeurs Page LETHAL VOLTAGE OPERATOR SAFETY SUMMARYHIGH VOLTAGE Terms in this ManualUse the Proper Power Cord Symbols Marked on EquipmentPower Source Use the Proper FuseDo Not Service Alone SERVICING SAFETY SUMMARYFOR QUALIFIED SERVICE PERSONNEL ONLY Use Care When Servicing With Power OnGet Help FIRST AID FOR ELECTRIC SHOCKFree the Victim From the Live Conductor Never Accept Ordinary and General Tests for DeathIntroduction and Specifications Chapter5725A Instruction Manual1-1.Introduction 1-2.Where to Go From Here 1-5.5725A Instruction Manual 1-3.How to Use the Manuals1-4.5725A Getting Started Manual 1-6.5700A/5720A Series II Manual Set1-11.Specifications 1-10.5700A/5720A Series II Service ManualDC Voltage Specifications 1-12.DC Voltage SpecificationsIntroduction and Specifications 5720A5700A 5725A5700A Instruction ManualNotes Introduction and SpecificationsDC Voltage Specifications Overshoot 5 %5720A 1-13.AC Voltage Specifications5725A Instruction Manual5720A Introduction and SpecificationsAC Voltage Specifications 95 % Confidence LevelInstruction Manual 5725A5700A 99 % Confidence Level5700A Introduction and SpecificationsAC Voltage Specifications 95% Confidence Level5725A Instruction ManualRange 5725A Amplifier Introduction and SpecificationsAC Voltage Specifications Figure 1-1. Volt-HertzCapability5720A 1-14.Resistance Specifications5725A 5720A5700A Introduction and SpecificationsResistance Specifications 5700A5725A Instruction ManualTable 1-12.Current Derating Factors Introduction and SpecificationsResistance Specifications I < IL5720A 99% 1-15.DC Current Specifications5725A 5720A 95%5700A Introduction and SpecificationsDC Current Specifications 5700ANotes 5725AInstruction Manual Overshoot: <5 %AC Current Specifications 1-16.AC Current SpecificationsIntroduction and Specifications 5720A 99%Instruction Manual 5725A5720A 95% 95 % Confidence Level5700A Introduction and SpecificationsAC Current Specifications 99 % Confidence LevelInstruction Manual 5725A5700A 95 % Confidence LevelIntroduction and Specifications AC Current SpecificationsStability ±1 C Note 5725A 1-28Instruction Manual General Specifications 1-18.General SpecificationsIntroduction and Specifications Guard isolation: 20Temperature Coefficient for 0-18C and 28-50C 1-19.Auxiliary Amplifier Specifications5220A AC Current, 180-dayspecifications 5725ATitle InstallationChapter Page5725A Instruction Manual2-1.Introduction 2-2.Unpacking and InspectionInstallation TYPE 5725AInstruction Manual VOLTAGE/CURRENT2-5.Cooling Considerations 2-3.Service Information2-4.Placement and Rack Mounting Service Information2-6.Connecting to the 5700A Calibrator Figure 2-2.Correct Way to Dress Interface Cable2-7.Selecting Line Voltage Selecting Line Voltage2-8.Accessing the Fuse 2-9.Connecting to Line Power Connecting to Line Power5725A Instruction ManualOperating Notes Chapter5725A Instruction Manual3-1.Introduction Operating NotesPOWER 3-2.Front Panel FeaturesFigure 3-1.Front Panel Features 5725ATable 3-1.Front Panel Features A B C D E F G HRear Panel Features 5725A STANDBY Indicator5725A 3-3.Rear Panel FeaturesFigure 3-2.Rear Panel Features Instruction ManualCALIBRATION Switch A B C D E F G HTable 3-2.Rear Panel Features 5700A CALIBRATOR Connector3-4.Turning on the 5725A Amplifier 3-5.Warm Up3-6.5725A Operating Functions and Modes 3-7.StandbyVoltage Standby Current Standby Operating Notes5725A Operating Functions and Modes 3-10 Voltage OperateOperating Notes 3-11Current Operate Conditions That Activate the 5725A3-12.Conditions That Activate the 5725A Theory of Operation ChapterHigh Voltage Heat Sink Assemblies High Voltage Sense Assembly A6High Voltage Amplifier A3 High Voltage Amplifier Feedback4-1.Introduction 4-2.Overall Functional DescriptionFigure 4-1.5725A Overall Block Diagram 5725AInstruction Manual 4-3.1100V AC Range Functional Description 4-4.11A Range Functional Description 4-7.Voltage and Current Standby Modes 4-5.Operation in the 11A DC Range4-6.Operation in the 11A AC Range 4-8.Voltage Standby4-10.How the 5700A and 5725A Communicate 4-11.Description of the Out-GuardLines 5725A Side4-12.Description of the In-GuardLines 4-13.Functional Summaries by Assembly 4-15.Interconnect Assembly A1 4-14.Detailed Circuit Description4-16.Power Supply Assembly A4 REF DES 4-17.High Voltage Supply SectionASSEMBLY Table 4-1.Internal Fuse Data4-18.Switching Section 4-19. Current-LimitSection 4-20.System Supply Section4-23.Microcomputer 4-22.Digital Assembly A54-21.Fan Supply Section 4-24.External RAMDetailed Circuit Description Figure 4-2.Digital Assembly Block DiagramTheory of Operation aq19f.eps4-28.Strobe Lines 4-26.EEROM4-27.Data Latch 4-29.Led Driver4-34.Current Amplifier Assembly A2 4-32.Power Up and Reset Circuitry4-33.Watchdog Timer 4-31. Break-DetectCircuitry5725A Instruction Manualaq20f.eps 4-35.Error Amplifier Section 4-36.Output Stage Section 4-37.Monitor Section4-38.Control and Switching Section 4-39.Power Supply Section4-40.High Voltage Amplifier A3 4-41.Input AmplifierTheory of Operation Detailed Circuit Descriptionaq22f.eps 4-42.Integrator 4-43.Window Comparator4-44.Input Clamp 4-47.Midstage -400VFilter 4-45.Transconductance and Cascode Stage4-46.Midstage 4-48.High Voltage Heat Sink Assemblies4-49.Autobias Current Source 4-50.Autobias Sense Circuit4-51.High Voltage Amplifier Feedback 4-52.Signal Transformers4-53.Temperature Monitoring Table 4-2.Signal Transformer Usage4-54.High Voltage Sense Assembly A6 Theory of Operation Detailed Circuit Descriptionaq21f.eps 4-55.Sense Amplifier Section ±3.2V during calibration STANDBY VOLTAGE LIMITS1 4-56.Analog Monitor SectionSIGNAL PHYSICAL4-58.Analog Input Switching Section 4-57.Serial Interface/Guard Crossing Section4-59.Control Section 4-60.AC Line Voltage Selection Section 5725A Instruction ManualCalibration and Verification Chapter5725A Instruction Manual5-2.Where to Find Further Information 5-1.IntroductionCalibration and Verification 5725A Instruction Manualstatic awareness Fluke CorporationA Message From 6.DO NOT SLIDE S.S. DEVICES OVER ANY SURFACE Maintenance Chapter5725A Instruction Manual6-1.Introduction 6-2.Replacing the Fuse6-3.Cleaning the Air Filter 6-4.General Cleaning 6-5.Cleaning PCA’sGeneral Cleaning A. TOP VIEW 6-6.Access ProceduresFigure 6-3.Assembly Location Diagram B. BOTTOM VIEW6-7.Initial Access Procedure HIGH VOLTAGE 6-8.Accessing the Power Supply Assembly A4 6-9.Accessing the Digital Assembly A55725A WHEN REINSTALLING DIGITAL ASSEMBLYFigure 6-5.Accessing the Digital Assembly Instruction Manual6-10.Accessing the Current Amplifier Assembly A2 6-11.Accessing the High Voltage Amplifier A3 Figure 6-6.Correct Way to Dress Cables6-12.Accessing the High Voltage Sense Assembly A6 6-14.Accessing the Interconnect Assembly A1 6-15.Enabling Front or Rear Binding Posts 9.Reinstall the top cover Troubleshooting Chapter5725A 7-2.5725A Fault Codes 7-3.Self Diagnostics7-1.Introduction 5725A Instruction Manual Table 7-1.5725A Fault CodesFAULT MESSAGEFAULT Self DiagnosticsTable 7-1.5725A Fault Codes cont MESSAGE7-4.Manual Tests for Fault Isolation FAULT NO Manual Tests for Fault IsolationTable 7-2.Analog Monitor Faults MESSAGE7-9. Reduced-VoltageTroubleshooting Mode 7-10.Testing the Power Supply By Itself Testing the Power Supply By Itself5725A Instruction ManualList of Replaceable Parts Chapter5725A Instruction Manual8-1.Introduction 8-2.How to Obtain Parts8-5.Service Centers 8-3.Manual Status InformationTable 8-2.Final Assembly 8-6.Parts ListsAssembly Name 5725AParts Lists Table 8-2.Final Assembly contList of Replaceable Parts Instruction Manual Table 8-2.Final Assembly cont5725A TM1 W1 W13 W14 W15 W16 W44 XF501List of Replaceable Parts Parts ListsFigure 8-1.Final Assembly aq24f.tifInstruction Manual Figure 8-1.Final Assembly cont5725A aq25f.tifList of Replaceable Parts Parts ListsFigure 8-1.Final Assembly cont aq26f.tifInstruction Manual Figure 8-1.Final Assembly cont5725A aq27f.tifList of Replaceable Parts Parts ListsFigure 8-1.Final Assembly cont aq28f.tifInstruction Manual Figure 8-1.Final Assembly cont5725A aq29f.tifList of Replaceable Parts Parts ListsFigure 8-1.Final Assembly cont aq30f.tifInstruction Manual Figure 8-1.Final Assembly cont5725A aq31f.tifParts Lists List of Replaceable PartsTable 8-3.A1 Interconnect PCA 5725A-1611 5725AInstruction Manual Figure 8-2.A1 Interconnect PCAParts Lists List of Replaceable PartsTable 8-4.A2 Current Amplifier PCA Table 8-4.A2 Current Amplifier PCA cont 5725AInstruction Manual Reference Description DesignatorTable 8-4.A2 Current Amplifier PCA cont Parts ListsList of Replaceable Parts R233,R237,R238 R273 R243,R244 R247,R248Figure 8-3.A2 Current Amplifier PCA 5725A5725A-1650 aq37f.epsParts Lists List of Replaceable PartsTable 8-5.A3 High Voltage Amplifier PCA 5725A Table 8-5.A3 High Voltage Amplifier PCA contTable 8-5.A3 High Voltage Amplifier PCA cont Parts ListsList of Replaceable Parts R640,R642 R641,R648 R643 R647 R651 R654,R661,R6845725A-1661 5725AInstruction Manual Figure 8-4.A3 High Voltage Amplifier PCAList of Replaceable Parts Parts ListsTable 8-6.A4 Power Supply PCA Reference DesignatorInstruction Manual Table 8-6.A4 Power Supply PCA cont5725A ReferenceList of Replaceable Parts Parts ListsTable 8-6.A4 Power Supply PCA cont R351 R355 R361,R362Instruction Manual Figure 8-5.A4 Power Supply PCA5725A 5725A-1631Table 8-7.A5 Digital PCA Parts ListsList of Replaceable Parts Reference5725A-1650 5725AInstruction Manual Figure 8-6.A5 Digital PCAParts Lists List of Replaceable PartsTable 8-8.A6 High Voltage Sense PCA 5725A Instruction ManualTable 8-8.A6 High Voltage Sense PCA cont Table 8-8.A6 High Voltage Sense PCA cont Parts ListsList of Replaceable Parts R154 R155 R156,R158,R168 R173 R162 R171 R172,R1755725A-1601 5725AInstruction Manual Figure 8-7.A6 High Voltage Sense PCAParts Lists Table 8-9.A12 Transformer Enclosure AssemblyList of Replaceable Parts Figure 8-8.A12 Transformer Enclosure Assembly 5725Aaq32f.tif Parts Lists List of Replaceable Partsaq33f.tif 5725A Instruction Manualaq34f.tif Parts Lists List of Replaceable Partsaq35f.tif Table 8-10.A30 Inductor PCA 5725AInstruction Manual Figure 8-9.A30 Inductor PCASchematic Diagrams Chapter5725A Figure 9-1.A1 Interconnect PCA Schematic Diagrams5725A-1611 aq48f.eps5725A Instruction ManualFigure 9-1.A1 Interconnect PCA cont Schematic Diagrams Figure 9-1.A1 Interconnect PCA contFigure 9-2.A2 Current Amplifier PCA 5725AInstruction Manual 5725A-1650Schematic Diagrams Figure 9-2.A2 Current Amplifier PCA cont5725A Instruction ManualFigure 9-2.A2 Current Amplifier PCA cont Schematic Diagrams Figure 9-2.A2 Current Amplifier PCA contFigure 9-3.A3 High Voltage Amplifier PCA 5725AInstruction Manual 5725A-1661Schematic Diagrams Figure 9-3.A3 High Voltage Amplifier PCA cont5725A Instruction ManualFigure 9-3.A3 High Voltage Amplifier PCA cont Schematic Diagrams Figure 9-4.A4 Power Supply PCAaq59f.eps Figure 9-4.A4 Power Supply PCA cont 5725AInstruction Manual Schematic Diagrams Figure 9-4.A4 Power Supply PCA contInstruction Manual AT PINS 12 AND 13 OF U5075725A TYPICAL COMMUNICATIONS ACTIVITYSchematic Diagrams Figure 9-5.A5 Digital PCA contSTANDBY 5725AInstruction Manual VOLTAGE STANDBYSchematic Diagrams Figure 9-6.A6 High Voltage Sense PCA cont5725A Instruction ManualFigure 9-6.A6 High Voltage Sense PCA cont Schematic Diagrams Figure 9-6.A6 High Voltage Sense PCA cont5725A Instruction ManualFigure 9-6.A6 High Voltage Sense PCA cont Schematic Diagrams Figure 9-7.A12 Transformer Enclosure Assemblyaq45f.eps 5725A Instruction ManualIndex 5725A Page 5725A