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Fluke 5725A instruction manual General Cleaning, Cleaning PCA’s

Models: 5725A

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Page 105

Image 105

Maintenance 6

General Cleaning

aq14f.eps

Figure 6-2. Accessing the Air Filter

General Cleaning

6-4.

To keep the 5725A looking like new, clean the case, front panel, and rear panel using a soft cloth slightly dampened with water or a non-abrasive mild cleaning solution that does not harm plastics.

Caution

Do not use aromatic hydrocarbons or chlorinated solvents for cleaning. They can damage the plastic materials used in the amplifier.

Cleaning PCA’s

6-5.

Printed circuit assemblies only need cleaning after repair work. After soldering on a pca, remove flux residue using isopropyl alcohol and a cotton swab.

6-5

Page 105

Image 105

Fluke 5725A instruction manual General Cleaning, Cleaning PCA’s

Contents

5725A Instruction ManualAmplifier Page Table of Contents Theory of Operation 5725ACalibration and Verification Instruction Manual 5725AList of Tables TableTitle Instruction Manual 5725AList of Figures FigureTitle 5725A viiiInstruction Manual Interference Information Declaration of the Manufacturer or ImporterBescheinigung des Herstellers/Importeurs Page HIGH VOLTAGE OPERATOR SAFETY SUMMARYLETHAL VOLTAGE Terms in this ManualPower Source Symbols Marked on EquipmentUse the Proper Power Cord Use the Proper FuseFOR QUALIFIED SERVICE PERSONNEL ONLY SERVICING SAFETY SUMMANYDo Not Service Alone Use Care When Servicing With Power OnFree the Victim From the Live Conductor FIRST AID FOR ELECTRIC SHOCKGet Help Never Accept Ordinary and General Tests for DeathChapter Introduction and SpecificationsInstruction Manual 5725AIntroduction Where to Go From Here 5725A Instruction Manual How to Use the Manuals5700A Operator Manual 5700A Operator Reference Guide5700A Service Manual SpecificationsSpecifications Introduction and SpecificationsDC Voltage Range Resolution ±5C from calibration temperature5725A Instruction ManualAC Voltage Introduction and Specifications SpecificationsAC Voltage continued Instruction Manual 5725AAC Voltage continued Voltage RangeSpecifications Introduction and Specifications±5C from calibration temperatureNote TemperatureFour-Wire Two-WireCompFour-Wire 5725A Instruction ManualIntroduction and Specifications SpecificationsDC Current 5725A Instruction ManualAC Current Introduction and Specifications SpecificationsAC Current continued Resolution Resolution5725A Instruction ManualSpecifications Introduction and SpecificationsGeneral Specifications Temperature performance: Operating: 0C to 50CInstruction Manual 5725AService Information InstallationPlacement and Rack Mounting Connecting to the 5700A CalibratorInstruction Manual 5725AUnpacking and Inspection InstallationIntroduction Instruction Manual 5725ATYPE VOLTAGE/CURRENTPlacement and Rack Mounting Service InformationCooling Considerations Service InformationFigure 2-2.Correct Way to Dress Interface Cable Connecting to the 5700A CalibratorSelecting Line Voltage Selecting Line VoltagewCaution Accessing the FuseConnecting to Line Power Connecting to Line PowerInstruction Manual 5725AChapter Operating NotesInstruction Manual 5725AOperating Notes IntroductionFigure 3-1.Front Panel Features Front Panel FeaturesPOWER 5725ARear Panel Features A B C D E F G HTable 3-1.Front Panel Features 5725A STANDBY IndicatorFigure 3-2.Rear Panel Features Rear Panel Features5725A Instruction ManualTable 3-2.Rear Panel Features A B C D E F G H ICALIBRATION Switch 5700A CALIBRATOR ConnectorWarm Up Turning on the 5725A AmplifierStandby 5725A Operating Functions and ModesVoltage Standby 5725A Operating Functions and Modes Current Standby3-10 Voltage OperateCurrent Operate 3-11Conditions That Activate the 5725A 3-12 Conditions That Activate the 5725AChapter Theory of OperationHigh Voltage Amplifier A3 High Voltage Sense Assembly A6High Voltage Heat Sink Assemblies High Voltage Amplifier FeedbackIntroduction Overall Functional DescriptionFigure 4-1.5725A Overall Block Diagram 5725AInstruction Manual 1100V AC Range Functional Description 11A Range Functional Description Operation in the 11A AC Range Operation in the 11A DC RangeVoltage and Current Standby Modes Voltage Standby4-10 How the 5700A and 5725A CommunicateDescription of the Out-GuardLines 5725A Side 4-114-12 Description of the In-GuardLines4-13 Functional Summaries by AssemblyDetailed Circuit Description Interconnect Assembly A14-14 4-154-16 Power Supply Assembly A44-17 High Voltage Supply SectionASSEMBLY REF DES4-18 Switching Section4-19 Current-LimitSectionSystem Supply Section 4-20Fan Supply Section Digital Assembly A54-21 4-22Theory of Operation Figure 4-2.Digital Assembly Block DiagramDetailed Circuit Description aq19f.eps4-26 EEROMData Latch 4-27Watchdog Timer Power Up and Reset CircuitryCurrent Amplifier Assembly A2 Break-DetectCircuitry5725A Instruction Manualaq20f.eps 4-35 Error Amplifier Section4-36 Output Stage SectionMonitor Section 4-37Power Supply Section Control and Switching Section4-38 4-394-40 High Voltage Amplifier A3Input Amplifier 4-41Theory of Operation Detailed Circuit Descriptionaq22f.eps 4-42 IntegratorWindow Comparator 4-434-45 Transconductance and Cascode StageMidstage 4-464-49 Autobias Current SourceAutobias Sense Circuit 4-50Temperature Monitoring Signal TransformersHigh Voltage Amplifier Feedback 4-514-54 High Voltage Sense Assembly A6Theory of Operation Detailed Circuit Descriptionaq21f.eps 4-55 Sense Amplifier Section±3.2V during calibration 4-56 Analog Monitor SectionSIGNAL STANDBY VOLTAGE LIMITS1Serial Interface/Guard Crossing Section Analog Input Switching Section4-57 4-584-59 Control Section4-60 AC Line Voltage Selection SectionInstruction Manual 5725AChapter Calibration and VerificationInstruction Manual 5725AWhere to Find Further Information IntroductionCalibration and Verification Instruction Manual 5725AChapter MaintenanceInstruction Manual 5725AIntroduction Replacing the FuseCleaning the Air Filter General Cleaning Cleaning PCA’sGeneral Cleaning Figure 6-3.Assembly Location Diagram Access ProceduresA. TOP VIEW B. BOTTOM VIEWwWarning Initial Access ProcedureHIGH VOLTAGE Accessing the Digital Assembly A5 Accessing the Power Supply Assembly A4Figure 6-5.Accessing the Digital Assembly WHEN REINSTALLING DIGITAL ASSEMBLY5725A Instruction Manual6-10 Accessing the Current Amplifier Assembly A2Accessing the High Voltage Amplifier A3 6-11Figure 6-6.Correct Way to Dress Cables 6-12 Accessing the High Voltage Sense Assembly A6Accessing the Interconnect Assembly A1 Accessing the High Voltage Output Transistors6-13 6-146-15 Enabling Front or Rear Binding Posts9.Reinstall the top cover Chapter TroubleshootingInstruction Manual 5725A5725A Fault Codes Self DiagnosticsIntroduction FAULT Table 7-1.5725A Fault Codes5725A Instruction Manual MESSAGETable 7-1.5725A Fault Codes cont Self DiagnosticsFAULT MESSAGEManual Tests for Fault Isolation Table 7-2.Analog Monitor Faults Manual Tests for Fault IsolationFAULT NO MESSAGEProblem 3: Fault When Entering Voltage Operate Reduced-VoltageTroubleshooting ModeProblem 4: Fault When Entering Current Standby Problem 5 Fault When Entering Current OperateTesting the Power Supply By Itself 7-10Testing the Power Supply By Itself Instruction Manual 5725AChapter List of Replaceable PartsInstruction Manual 5725AManual Status Information How to Obtain PartsNewer Instruments IntroductionAssembly Name Service CentersTable 8-1.Final Assembly 5725AList of Replaceable Parts Table 8-1.Final Assembly contFigure 8-1.Final Assembly 5725Aaq24f.tif Figure 8-1.Final Assembly cont List of Replaceable Partsaq25f.tif 5725A Figure 8-1.Final Assembly contInstruction Manual aq26f.tifFigure 8-1.Final Assembly cont List of Replaceable Partsaq27f.tif 5725A Figure 8-1.Final Assembly contInstruction Manual aq28f.tifFigure 8-1.Final Assembly cont List of Replaceable Partsaq29f.tif 5725A Figure 8-1.Final Assembly contInstruction Manual aq30f.tifFigure 8-1.Final Assembly cont List of Replaceable Partsaq31f.tif Table 8-2.A1 Interconnect PCA 5725A5725A-1611 List of Replaceable PartsFigure 8-2.A1 Interconnect PCA aq36f.eps5725A Instruction ManualTable 8-3.A2 Current Amplifier PCA Table 8-3.A2 Current Amplifier PCA cont List of Replaceable PartsInstruction Manual 5725ATable 8-3.A2 Current Amplifier PCA cont Reference Description Designator5725A-1650 List of Replaceable PartsFigure 8-3.A2 Current Amplifier PCA aq37f.eps5725A Instruction ManualTable 8-4.A3 High Voltage Amplifier PCA List of Replaceable Parts Table 8-4.A3 High Voltage Amplifier PCA contDesignator Instruction Manual 5725ATable 8-4.A3 High Voltage Amplifier PCA cont R640,R6425725A-1661 List of Replaceable PartsFigure 8-4.A3 High Voltage Amplifier PCA aq38f.epsTable 8-5.A4 Power Supply PCA 5725AInstruction Manual List of Replaceable Parts Table 8-5.A4 Power Supply PCA cont5725A Table 8-5.A4 Power Supply PCA contInstruction Manual R351 R355 R361,R362List of Replaceable Parts Figure 8-5.A4 Power Supply PCA5725A-1631 aq39f.eps5725A Instruction ManualTable 8-6.A5 Digital PCA 5725A-1650 List of Replaceable PartsFigure 8-6.A5 Digital PCA aq40f.epsTable 8-7.A6 High Voltage Sense PCA 5725ATable 8-7.A6 High Voltage Sense PCA cont List of Replaceable PartsInstruction Manual 5725ATable 8-7.A6 High Voltage Sense PCA cont R154 R155 R156,R158,R168 R173 R162 R171 R172,R1755725A-1601 List of Replaceable PartsFigure 8-7.A6 High Voltage Sense PCA aq41f.epsTable 8-8.A12 Transformer Enclosure Assembly 5725AInstruction Manual Figure 8-8.A12 Transformer Enclosure Assembly List of Replaceable Partsaq32f.tif aq33f.tif 5725Aaq34f.tif List of Replaceable Parts5725A Instruction Manualaq35f.tif Table 8-9.A30 Inductor PCA List of Replaceable Parts5725A-1603 Figure 8-9.A30 Inductor PCA5725A Chapter Schematic DiagramsInstruction Manual 5725A5725A-1611 Schematic DiagramsFigure 9-1.A1 Interconnect PCA aq48f.eps5725A Instruction ManualFigure 9-1.A1 Interconnect PCA cont Figure 9-1.A1 Interconnect PCA cont Schematic DiagramsInstruction Manual 5725AFigure 9-2.A2 Current Amplifier PCA 5725A-1650Figure 9-2.A2 Current Amplifier PCA cont Schematic Diagrams5725A Instruction ManualFigure 9-2.A2 Current Amplifier PCA cont Figure 9-2.A2 Current Amplifier PCA cont Schematic DiagramsInstruction Manual 5725AFigure 9-3.A3 High Voltage Amplifier PCA 5725A-1661Figure 9-3.A3 High Voltage Amplifier PCA cont Schematic Diagrams5725A Instruction ManualFigure 9-3.A3 High Voltage Amplifier PCA cont Schematic Diagrams Figure 9-4.A4 Power Supply PCAaq59f.eps 5725A Figure 9-4.A4 Power Supply PCA contFigure 9-4.A4 Power Supply PCA cont Schematic Diagrams5725A AT PINS 12 AND 13 OF U507Instruction Manual TYPICAL COMMUNICATIONS ACTIVITYFigure 9-5.A5 Digital PCA cont Schematic DiagramsInstruction Manual 5725ASTANDBY VOLTAGE STANDBYFigure 9-6.A6 High Voltage Sense PCA cont Schematic Diagrams5725A Instruction ManualFigure 9-6.A6 High Voltage Sense PCA cont Figure 9-6.A6 High Voltage Sense PCA cont Schematic Diagrams5725A Instruction ManualFigure 9-6.A6 High Voltage Sense PCA cont Schematic Diagrams Figure 9-7.A12 Transformer Enclosure Assemblyaq45f.eps Instruction Manual 5725AIndex 5725A Page Instruction Manual 5725AManual Supplement rear Change #1