Fluke 5725A Manual de usuario

Busca en linea o descarga Manual de usuario para Amplificadores de audio de coche Fluke 5725A. Fluke 5725A User's Manual [en] Manual de usuario

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Indice de contenidos

Pagina 1 - Instruction Manual

®5725AAmplifierInstruction ManualPN 823435January 1989Rev. 6, 6/96© 1993, 1996 Fluke Corporation, All rights reserved. Printed in U.S.A.All product na

Pagina 2

5725AInstruction Manualviii

Pagina 3 - Table of Contents

5725AInstruction Manual5-4

Pagina 4

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

Pagina 5 - Contents

5725AInstruction Manual6-2

Pagina 6

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

Pagina 7 - List of Tables

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

Pagina 8

MaintenanceGeneral Cleaning66-5aq14f.epsFigure 6-2. Accessing the Air FilterGeneral Cleaning 6-4.To keep the 5725A looking like new, clean the case, f

Pagina 9 - List of Figures

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

Pagina 10

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

Pagina 11 - Interference Information

5725AInstruction Manual6-8CURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OFFPOWER11AMAX2OVPKMAXLEDCR317TP301FRONT PANELTP307TP304LEDCR318HIGH VOLTAGEAMPL

Pagina 12

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

Pagina 13 - OPERATOR SAFETY

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

Pagina 14

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

Pagina 15 - SERVICING SAFETY

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

Pagina 16 - ELECTRIC SHOCK

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

Pagina 17 - Chapter 1

MaintenanceAccess Procedures66-13Accessing the High Voltage Sense Assembly (A6) 6-12.WarningTo avoid electrical shock, do not proceed with the followi

Pagina 18

5725AInstruction Manual6-14Accessing the High Voltage Output Transistors 6-13.WarningDuring normal operation, the high voltage heat sinks are atlethal

Pagina 19 - Introduction 1-1

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

Pagina 20 - Where to Go From Here 1-2

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

Pagina 21 - 5700A Operator Manual 1-5

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

Pagina 22 - Specifications 1-9

5725AInstruction Manual7-2

Pagina 23 - Specifications

TroubleshootingIntroduction77-3Introduction 7-1.This section provides troubleshooting information in three parts. First a listing of all5725A fault co

Pagina 25

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

Pagina 26

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

Pagina 27

5725AInstruction Manual7-6Manual Tests for Fault Isolation 7-4.WarningThe following servicing is to be done by qualified servicepersonnel only. To avo

Pagina 28

TroubleshootingManual Tests for Fault Isolation77-7Problems 1 or 2: Fault at Power-Up or When Entering Voltage Standby 7-5.Proceed as follows to isola

Pagina 29

5725AInstruction Manual7-8Problem 3: Fault When Entering Voltage Operate 7-6.Proceed as follows to isolate the problem in this condition:1. Suspect t

Pagina 30

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

Pagina 31

5725AInstruction Manual7-10

Pagina 32

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

Pagina 33

5725AInstruction Manual8-2

Pagina 34

List of Replaceable Parts88-3Introduction 8-1.This chapter contains an illustrated list of replaceable parts for the 7-300, 7-600, 12B,and 18 Meters.

Pagina 35 - Installation

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

Pagina 36

5725AInstruction Manual8-4Service Centers 8-5.A list of service centers is located at the end of this section.Note This instrument may contain a Nicke

Pagina 37 - Unpacking and Inspection 2-2

List of Replaceable Parts88-5Table 8-1. Final Assembly (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesH437 SCREW,PH,P,LOCK,SS,6-32,.750

Pagina 38 - LC-5 LC-6 LC-7

5725AInstruction Manual8-6aq24f.tifFigure 8-1. Final Assembly

Pagina 39 - Cooling Considerations 2-5

List of Replaceable Parts88-7aq25f.tifFigure 8-1. Final Assembly (cont)

Pagina 40

5725AInstruction Manual8-8aq26f.tifFigure 8-1. Final Assembly (cont)

Pagina 41 - Selecting Line Voltage 2-7

List of Replaceable Parts88-9aq27f.tifFigure 8-1. Final Assembly (cont)

Pagina 42 - Accessing the Fuse 2-8

5725AInstruction Manual8-10aq28f.tifFigure 8-1. Final Assembly (cont)

Pagina 43 - Connecting to Line Power 2-9

List of Replaceable Parts88-11aq29f.tifFigure 8-1. Final Assembly (cont)

Pagina 44

5725AInstruction Manual8-12aq30f.tifFigure 8-1. Final Assembly (cont)

Pagina 45 - Operating Notes

List of Replaceable Parts88-13aq31f.tifFigure 8-1. Final Assembly (cont)

Pagina 46

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

Pagina 47 - Introduction 3-1

5725AInstruction Manual8-14Table 8-2. A1 Interconnect PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesCR1,CR13-15 * DIODE,SI,BV=75V,IO=150M

Pagina 48 - Front Panel Features 3-2

List of Replaceable Parts88-155725A-1611aq36f.epsFigure 8-2. A1 Interconnect PCA

Pagina 49 - Rear Panel Features

5725AInstruction Manual8-16Table 8-3. A2 Current Amplifier PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC201,C202,C207,C208,C211,C212,C2

Pagina 50 - Rear Panel Features 3-3

List of Replaceable Parts88-17Table 8-3. A2 Current Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesMP28 INSULATOR, CURREN

Pagina 51

5725AInstruction Manual8-18Table 8-3. A2 Current Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR233,R237,R238,R273RES,MF

Pagina 52 - Warm Up 3-5

List of Replaceable Parts88-195725A-1650aq37f.epsFigure 8-3. A2 Current Amplifier PCA

Pagina 53 - Standby 3-7

5725AInstruction Manual8-20Table 8-4. A3 High Voltage Amplifier PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC601 CAP,POLYES,1UF,+-10%,5

Pagina 54 - Voltage Standby 3-8

List of Replaceable Parts88-21Table 8-4. A3 High Voltage Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesMP668 NUT,HEX,MIN

Pagina 55 - Current Standby 3-9

5725AInstruction Manual8-22Table 8-4. A3 High Voltage Amplifier PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR640,R642 RES,CF,100

Pagina 56 - Voltage Operate 3-10

List of Replaceable Parts88-235725A-1661aq38f.epsFigure 8-4. A3 High Voltage Amplifier PCA

Pagina 57 - Current Operate 3-11

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

Pagina 58

5725AInstruction Manual8-24Table 8-5. A4 Power Supply PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC301,C302,C321,C322CAP,AL,220UF,+-20%

Pagina 59 - Theory of Operation

List of Replaceable Parts88-25Table 8-5. A4 Power Supply PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesMP310 AIDE,PCB PULL 541730

Pagina 60

5725AInstruction Manual8-26Table 8-5. A4 Power Supply PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR351 RES,CF,1K,+-5%,0.25W 3434

Pagina 61 - Introduction 4-1

List of Replaceable Parts88-275725A-1631aq39f.epsFigure 8-5. A4 Power Supply PCA

Pagina 62

5725AInstruction Manual8-28Table 8-6. A5 Digital PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC501,C503-511,C516,C518,C519,C521CAP,POLYE

Pagina 63

List of Replaceable Parts88-295725A-1650aq40f.epsFigure 8-6. A5 Digital PCA

Pagina 64

5725AInstruction Manual8-30Table 8-7. A6 High Voltage Sense PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesC100,C121 CAP,POLYCA,1UF,+-10%,

Pagina 65 - Current Standby 4-9

List of Replaceable Parts88-31Table 8-7. A6 High Voltage Sense PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesJ403 HEADER,1 ROW,.15

Pagina 66

5725AInstruction Manual8-32Table 8-7. A6 High Voltage Sense PCA (cont)ReferenceDesignatorDescriptionFluke StockNoTot Qty NotesR154 RES,MF,20K,+-0.1%,0

Pagina 67

List of Replaceable Parts88-335725A-1601aq41f.epsFigure 8-7. A6 High Voltage Sense PCA

Pagina 68

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

Pagina 69 - Detailed Circuit Description

5725AInstruction Manual8-34Table 8-8. A12 Transformer Enclosure AssemblyReferenceDesignatorDescriptionFluke StockNoTot Qty NotesH1 SCREW,FHU,P,LOCK,SS

Pagina 70

List of Replaceable Parts88-35aq32f.tifFigure 8-8. A12 Transformer Enclosure Assembly

Pagina 71

5725AInstruction Manual8-36aq33f.tifFigure 8-8. A12 Transformer Enclosure Assembly (cont)

Pagina 72 - Switching Section 4-18

List of Replaceable Parts88-37aq34f.tifFigure 8-8. A12 Transformer Enclosure Assembly (cont)

Pagina 73 - System Supply Section 4-20

5725AInstruction Manual8-38aq35f.tifFigure 8-8. A12 Transformer Enclosure Assembly (cont)

Pagina 74 - External ROM 4-25

List of Replaceable Parts88-39Table 8-9. A30 Inductor PCAReferenceDesignatorDescriptionFluke StockNoTot Qty NotesJ1 CONN,MATE-N-LOK,HEADER,4 PIN 51226

Pagina 75

5725AInstruction Manual8-40

Pagina 76 - Optoisolator Link 4-30

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

Pagina 77 - Watchdog Timer 4-33

5725AInstruction Manual9-2

Pagina 78

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

Pagina 79 - Error Amplifier Section 4-35

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

Pagina 80 - Monitor Section 4-37

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

Pagina 81 - Power Supply Section 4-39

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

Pagina 82 - Input Amplifier 4-41

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

Pagina 83

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

Pagina 84 - Input Clamp 4-44

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

Pagina 85 - Midstage -400V Filter 4-47

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

Pagina 86 - Autobias Sense Circuit 4-50

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

Pagina 87 - Temperature Monitoring 4-53

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

Pagina 88

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

Pagina 89

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

Pagina 91

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

Pagina 92 - Analog Monitor Section 4-56

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

Pagina 93

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

Pagina 94 - Control Section 4-59

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

Pagina 95

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

Pagina 96

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

Pagina 97 - Calibration and Verification

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

Pagina 98

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

Pagina 99 - Introduction 5-1

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

Pagina 100

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

Pagina 101 - Maintenance

Introduction and SpecificationsIntroduction11-3Introduction 1-1.The Fluke 5725A Amplifier enhances the 5700A Calibrator in the ac voltage, ac current,

Pagina 102

5725AInstruction Manual9-24

Pagina 103 - Replacing the Fuse 6-2

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

Pagina 104 - Cleaning the Air Filter 6-3

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

Pagina 105 - Cleaning PCA’s 6-5

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

Pagina 106 - Access Procedures 6-6

5725AInstruction Manual4

Pagina 107 - Initial Access Procedure 6-7

Manual Supplement© 1996 Fluke Corporation. All rights reserved. Printed in the U.S.A. Manual Title: 5725A Supplement Issue: 1Part Number: 823435 Issu

Pagina 108

5725A Manual Supplement6/96 1Change #1On page 6-8, replace the first sentence in the Warning with the last sentence in step 6.On page 6-9, paragraph

Pagina 110

5725AInstruction Manual1-4Where to Go From Here 1-2.This manual is the operator and service manual for the 5725A. However, because the5725A operates u

Pagina 111

Introduction and SpecificationsHow to Use the Manuals11-5How to Use the Manuals 1-3.The following paragraphs describe how each manual addresses the 57

Pagina 112

5725AInstruction Manual1-65700A Service Manual 1-8.The 5700A Service Manual is a maintenance guide for the 5700A. The following 5725Atopics are includ

Pagina 113

Introduction and SpecificationsSpecifications11-7DC VoltageAbsolute Uncertainty± 5°C from calibration temperatureRelative Uncertainty ± 1°CRange Resol

Pagina 114

5725AInstruction Manual1-8AC VoltageRange Resolution FrequencyAbsolute Uncertainty± 5°C from calibration temperatureRelative Uncertainty± 1°C24 Hours

Pagina 115

Introduction and SpecificationsSpecifications11-9AC Voltage (continued)Secondary Performance Specifications and Operating CharacteristicsIncluded in U

Pagina 116

5725AInstruction Manual1-10AC Voltage (continued)Secondary Performance and Operating Characteristics (continued)Included in Uncertainty Specifications

Pagina 117 - Troubleshooting

Introduction and SpecificationsSpecifications11-11ResistanceNominalAbsolute Uncertainty of Characterized Value±5°C from calibration temperature [Note

Pagina 118

5725AInstruction Manual1-12Current Derating FactorsNominal Value Value of Derating Factor K for Over or Under CurrentΩTwo-Wire CompI<IL (Note 1)Fou

Pagina 119 - Self Diagnostics 7-3

Introduction and SpecificationsSpecifications11-13DC CurrentRangeResolutionAbsolute Uncertainty±5°C from calibration temperatureFor fields strengths &

Pagina 120

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

Pagina 121 - Self Diagnostics

5725AInstruction Manual1-14AC CurrentRange ResolutionFrequencyAbsolute Uncertainty±5°C from calibration temperatureFor fields strengths >1 V/m but

Pagina 122

Introduction and SpecificationsSpecifications11-15AC Current (continued)Secondary Performance Specifications and Operating CharacteristicsIncluded in

Pagina 123

5725AInstruction Manual1-16Wideband AC Voltage (Option -03)Specifications apply to the end of the cable and 50Ω termination used for calibration:Range

Pagina 124 - Warning

Introduction and SpecificationsSpecifications11-17General Specifications:Warm-Up time: 2 X the time since last warmed up, to a maximum of 30 minutes.S

Pagina 125

5725AInstruction Manual1-18

Pagina 126

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

Pagina 127 - List of Replaceable Parts

5725AInstruction Manual2-2

Pagina 128

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

Pagina 129 - Newer Instruments 8-4

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

Pagina 130 - Service Centers 8-5

InstallationService Information22-5Service Information 2-3.Each 5725A Amplifier is warranted to the original purchaser for a period of one yearbeginni

Pagina 131

5725AInstruction Manualii4 Theory of Operation... 4-14-1. Introduction ...

Pagina 132

5725AInstruction Manual2-6Connecting to the 5700A Calibrator 2-6.Proceed as follows to connect the 5725A to the 5700A:1. Turn the power off for both

Pagina 133

InstallationSelecting Line Voltage22-7Selecting Line Voltage 2-7.The 5725A arrives from the factory configured for the line voltage normally appropria

Pagina 134

5725AInstruction Manual2-8Accessing the Fuse 2-8.wCautionTo prevent instrument damage, verify that the correct fuse isinstalled for the line voltage s

Pagina 135

InstallationConnecting to Line Power22-9Connecting to Line Power 2-9.WarningTo avoid shock hazard, connect the factory-supplied, three-conductor line

Pagina 136

5725AInstruction Manual2-10

Pagina 137

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

Pagina 138

5725AInstruction Manual3-2

Pagina 139

Operating NotesIntroduction33-3Introduction 3-1.This section provides setup and operation information for the 5725A Amplifier. Thissection begins with

Pagina 140

5725AInstruction Manual3-4Front Panel Features 3-2.Front panel features are called out in Figure 3-1. Each front panel feature is described inTable 3-

Pagina 141

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

Pagina 142

Contents (continued)iii4-54. High Voltage Sense Assembly (A6)... 4-304-55. Sense Amplifier Section...

Pagina 143

5725AInstruction Manual3-6Rear Panel Features 3-3.Rear panel features are called out in Figure 3-2. Each rear panel feature is brieflydescribed in Tab

Pagina 144

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

Pagina 145

5725AInstruction Manual3-8Turning on the 5725A Amplifier 3-4.WarningTo avoid electric shock, make sure the 5725A is safelygrounded as described in sec

Pagina 146

Operating Notes5725A Operating Functions and Modes33-95725A Operating Functions and Modes 3-6.WarningBoth the 5700A and 5725A can produce fatal voltag

Pagina 147

5725AInstruction Manual3-10Voltage Standby 3-8.NOOUTPUTCURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OFF11AMAX2OVPKMAXNO OU

Pagina 148

Operating Notes5725A Operating Functions and Modes33-11Current Standby 3-9.CURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OF

Pagina 149

5725AInstruction Manual3-12Voltage Operate 3-10.CURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OFF11AMAX2OVPKMAXNO OUTPUTHIH

Pagina 150

Operating NotesConditions That Activate the 5725A33-13Current Operate 3-11.CURRENTOUTPUTHILOVOLTAGE MODECURRENT MODE5725A STANDBYFAULTOVERLOADCABLE OF

Pagina 151

5725AInstruction Manual3-14Conditions That Activate the 5725A 3-12.When the 5725A is connected to the 5700A, and is selected as the amplifier for thea

Pagina 152

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

Pagina 153

5725AInstruction Manualiv

Pagina 154

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

Pagina 155

Theory of OperationIntroduction44-3Introduction 4-1.This section presents theory of operation in increasing level of detail. The 5725AAmplifier is fir

Pagina 156

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

Pagina 157

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

Pagina 158

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

Pagina 159

Theory of OperationOverall Functional Description44-7Operation in the 11A DC Range 4-5.For the dc current function, the 5700A is configured for the dc

Pagina 160

5725AInstruction Manual4-8How the 5700A and 5725A Communicate 4-10.The 5725A and 5700A maintain all analog and digital communication over an externalc

Pagina 161

Theory of OperationOverall Functional Description44-9Description of the In-Guard Lines 4-12.The following list describes the 11 5725A in-guard lines:•

Pagina 162

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

Pagina 163

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

Pagina 164

vList of TablesTable Title Page2-1. Standard Equipment...

Pagina 165

5725AInstruction Manual4-12Power Supply Assembly (A4) 4-16.The Power Supply assembly (A4) provides regulated system supplies for all 5725Aassemblies e

Pagina 166

Theory of OperationDetailed Circuit Description44-13High Voltage Supply Section 4-17.The high voltage supply allows normal operation from a pair of no

Pagina 167 - Schematic Diagrams

5725AInstruction Manual4-14Switching Section 4-18.MOSFETs Q301/Q317 and Q302/Q318 (each in parallel) are series-switch elements forthe +400V supply. S

Pagina 168

Theory of OperationDetailed Circuit Description44-15Current-Limit Section 4-19.Resistors R313 and R329 are current shunts for the high voltage supplie

Pagina 169

5725AInstruction Manual4-16Fan Supply Section 4-21.The fan supply uses the same transformer secondary windings as the ±15 and ±20Vsupplies. Its own fu

Pagina 170

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

Pagina 171

5725AInstruction Manual4-18EEROM 4-26.A 2Kb X 8 EEROM (U512) stores 5725A calibration constants plus the date andtemperature of calibration. If the re

Pagina 172

Theory of OperationDetailed Circuit Description44-19Break-Detect Circuitry 4-31.The 6303Y divides the 4.9152-MHz crystal frequency by four to create t

Pagina 173

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

Pagina 174

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

Pagina 175

5725AInstruction Manualvi

Pagina 176

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

Pagina 177

Theory of OperationDetailed Circuit Description44-23Control and Switching Section 4-38.Refer to page 2 of the Current Amplifier schematic. Relays K201

Pagina 178

5725AInstruction Manual4-24High Voltage Amplifier (A3) 4-40.The High Voltage Amplifier assembly, operating with the step-up signal transformers,consti

Pagina 179

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

Pagina 180

5725AInstruction Manual4-26Integrator 4-42.Op amp U601A is configured as an integrator to reduce the output offset of the inputamplifier circuit. This

Pagina 181

Theory of OperationDetailed Circuit Description44-27Transconductance and Cascode Stage 4-45.The output voltage of the input amplifier U602, LVAMP, is

Pagina 182

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

Pagina 183

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

Pagina 184

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

Pagina 185

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

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viiList of FiguresFigure Title Page2-1. Line Power Cords Available for Fluke Instruments... 2-42-2. Correct

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

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

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

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

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

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Theory of OperationDetailed Circuit Description44-37AC Line Voltage Selection Section 4-60.In addition to the primary power switch, S401, this section

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5725AInstruction Manual4-38

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

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5725AInstruction Manual5-2

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Calibration and VerificationIntroduction55-3Introduction 5-1.The 5725A is calibrated at the factory before shipping. Calibration is traceable to theU.

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