5725A
Instruction Manual
Amplifier
LIMITED WARRANTY AND LIMITATION OF LIABILITY
Table of Contents
5725A
Theory of Operation
Maintenance
Troubleshooting
Calibration and Verification
Schematic Diagrams
How to Obtain Parts
Service Centers
Parts Lists
List of Tables
Table
Title
5725A
8-15
List of Figures
Figure
Title
5725A
viii
Instruction Manual
Interference Information
Declaration of the Manufacturer or Importer
Bescheinigung des Herstellers/Importeurs
Page
OPERATOR SAFETY SUMMARY
HIGH VOLTAGE
LETHAL VOLTAGE
Terms in this Manual
Symbols Marked on Equipment
Power Source
Use the Proper Power Cord
Use the Proper Fuse
SERVICING SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Do Not Service Alone
Use Care When Servicing With Power On
FIRST AID FOR ELECTRIC SHOCK
Free the Victim From the Live Conductor
Get Help
Never Accept Ordinary and General Tests for Death
Introduction and Specifications
Chapter
5725A
Instruction Manual
1-1.Introduction
1-2.Where to Go From Here
1-3.How to Use the Manuals
1-4.5725A Getting Started Manual
1-5.5725A Instruction Manual
1-6.5700A/5720A Series II Manual Set
1-11.Specifications
1-10.5700A/5720A Series II Service Manual
1-12.DC Voltage Specifications
Introduction and Specifications
DC Voltage Specifications
5720A
5725A
5700A
5700A
Instruction Manual
Introduction and Specifications
DC Voltage Specifications
Notes
Overshoot 5 %
1-13.AC Voltage Specifications
5725A
5720A
Instruction Manual
Introduction and Specifications
AC Voltage Specifications
5720A
95 % Confidence Level
5725A
5700A
Instruction Manual
99 % Confidence Level
Introduction and Specifications
AC Voltage Specifications
5700A
95% Confidence Level
5725A
Instruction Manual
Range
Introduction and Specifications
AC Voltage Specifications
5725A Amplifier
Figure 1-1. Volt-HertzCapability
1-14.Resistance Specifications
5725A
5720A
5720A
Introduction and Specifications
Resistance Specifications
5700A
5700A
5725A
Instruction Manual
Introduction and Specifications
Resistance Specifications
Table 1-12.Current Derating Factors
I < IL
1-15.DC Current Specifications
5725A
5720A 99%
5720A 95%
Introduction and Specifications
DC Current Specifications
5700A
5700A
5725A
Instruction Manual
Notes
Overshoot: <5 %
1-16.AC Current Specifications
Introduction and Specifications
AC Current Specifications
5720A 99%
5725A
5720A 95%
Instruction Manual
95 % Confidence Level
Introduction and Specifications
AC Current Specifications
5700A
99 % Confidence Level
5725A
5700A
Instruction Manual
95 % Confidence Level
Introduction and Specifications
AC Current Specifications
Stability ±1 C Note
5725A
1-28
Instruction Manual
1-18.General Specifications
Introduction and Specifications
General Specifications
Guard isolation: 20
1-19.Auxiliary Amplifier Specifications
5220A AC Current, 180-dayspecifications
Temperature Coefficient for 0-18C and 28-50C
5725A
Installation
Chapter
Title
Page
5725A
Instruction Manual
2-1.Introduction
2-2.Unpacking and Inspection
Installation
5725A
Instruction Manual
TYPE
VOLTAGE/CURRENT
2-3.Service Information
2-4.Placement and Rack Mounting
2-5.Cooling Considerations
Service Information
2-6.Connecting to the 5700A Calibrator
Figure 2-2.Correct Way to Dress Interface Cable
2-7.Selecting Line Voltage
Selecting Line Voltage
2-8.Accessing the Fuse
2-9.Connecting to Line Power
Connecting to Line Power
5725A
Instruction Manual
Operating Notes
Chapter
5725A
Instruction Manual
3-1.Introduction
Operating Notes
3-2.Front Panel Features
Figure 3-1.Front Panel Features
POWER
5725A
A B C D E F G H
Rear Panel Features
Table 3-1.Front Panel Features
5725A STANDBY Indicator
3-3.Rear Panel Features
Figure 3-2.Rear Panel Features
5725A
Instruction Manual
A B C D E F G H
Table 3-2.Rear Panel Features
CALIBRATION Switch
5700A CALIBRATOR Connector
3-4.Turning on the 5725A Amplifier
3-5.Warm Up
3-6.5725A Operating Functions and Modes
3-7.Standby
Voltage Standby
Current Standby
Operating Notes
5725A Operating Functions and Modes
3-10
Voltage Operate
3-11
Current Operate
Operating Notes
Conditions That Activate the 5725A
3-12.Conditions That Activate the 5725A
Theory of Operation
Chapter
High Voltage Sense Assembly A6
High Voltage Amplifier A3
High Voltage Heat Sink Assemblies
High Voltage Amplifier Feedback
4-1.Introduction
4-2.Overall Functional Description
Figure 4-1.5725A Overall Block Diagram
5725A
Instruction Manual
4-3.1100V AC Range Functional Description
4-4.11A Range Functional Description
4-5.Operation in the 11A DC Range
4-6.Operation in the 11A AC Range
4-7.Voltage and Current Standby Modes
4-8.Voltage Standby
4-10.How the 5700A and 5725A Communicate
4-11.Description of the Out-GuardLines 5725A Side
4-12.Description of the In-GuardLines
4-13.Functional Summaries by Assembly
4-15.Interconnect Assembly A1
4-14.Detailed Circuit Description
4-16.Power Supply Assembly A4
4-17.High Voltage Supply Section
ASSEMBLY
REF DES
Table 4-1.Internal Fuse Data
4-18.Switching Section
4-19. Current-LimitSection
4-20.System Supply Section
4-22.Digital Assembly A5
4-21.Fan Supply Section
4-23.Microcomputer
4-24.External RAM
Figure 4-2.Digital Assembly Block Diagram
Theory of Operation
Detailed Circuit Description
aq19f.eps
4-26.EEROM
4-27.Data Latch
4-28.Strobe Lines
4-29.Led Driver
4-32.Power Up and Reset Circuitry
4-33.Watchdog Timer
4-34.Current Amplifier Assembly A2
4-31. Break-DetectCircuitry
5725A
Instruction Manual
aq20f.eps
4-35.Error Amplifier Section
4-36.Output Stage Section
4-37.Monitor Section
4-38.Control and Switching Section
4-39.Power Supply Section
4-40.High Voltage Amplifier A3
4-41.Input Amplifier
Theory of Operation
Detailed Circuit Description
aq22f.eps
4-42.Integrator
4-43.Window Comparator
4-44.Input Clamp
4-45.Transconductance and Cascode Stage
4-46.Midstage
4-47.Midstage -400VFilter
4-48.High Voltage Heat Sink Assemblies
4-49.Autobias Current Source
4-50.Autobias Sense Circuit
4-52.Signal Transformers
4-53.Temperature Monitoring
4-51.High Voltage Amplifier Feedback
Table 4-2.Signal Transformer Usage
4-54.High Voltage Sense Assembly A6
Theory of Operation
Detailed Circuit Description
aq21f.eps
4-55.Sense Amplifier Section
±3.2V during calibration
4-56.Analog Monitor Section
SIGNAL
STANDBY VOLTAGE LIMITS1
PHYSICAL
4-58.Analog Input Switching Section
4-57.Serial Interface/Guard Crossing Section
4-59.Control Section
4-60.AC Line Voltage Selection Section
5725A
Instruction Manual
Calibration and Verification
Chapter
5725A
Instruction Manual
5-2.Where to Find Further Information
5-1.Introduction
Calibration and Verification
5725A
Instruction Manual
static awareness
Fluke Corporation
A Message From
6.DO NOT SLIDE S.S. DEVICES OVER ANY SURFACE
Maintenance
Chapter
5725A
Instruction Manual
6-1.Introduction
6-2.Replacing the Fuse
6-3.Cleaning the Air Filter
6-4.General Cleaning
6-5.Cleaning PCA’s
General Cleaning
6-6.Access Procedures
Figure 6-3.Assembly Location Diagram
A. TOP VIEW
B. BOTTOM VIEW
6-7.Initial Access Procedure
HIGH VOLTAGE
6-8.Accessing the Power Supply Assembly A4
6-9.Accessing the Digital Assembly A5
WHEN REINSTALLING DIGITAL ASSEMBLY
Figure 6-5.Accessing the Digital Assembly
5725A
Instruction Manual
6-10.Accessing the Current Amplifier Assembly A2
6-11.Accessing the High Voltage Amplifier A3
Figure 6-6.Correct Way to Dress Cables
6-12.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
Chapter
5725A
7-2.5725A Fault Codes
7-3.Self Diagnostics
7-1.Introduction
Table 7-1.5725A Fault Codes
FAULT
5725A Instruction Manual
MESSAGE
Self Diagnostics
Table 7-1.5725A Fault Codes cont
FAULT
MESSAGE
7-4.Manual Tests for Fault Isolation
Manual Tests for Fault Isolation
Table 7-2.Analog Monitor Faults
FAULT NO
MESSAGE
7-9. Reduced-VoltageTroubleshooting Mode
7-10.Testing the Power Supply By Itself
Testing the Power Supply By Itself
5725A
Instruction Manual
List of Replaceable Parts
Chapter
5725A
Instruction Manual
8-2.How to Obtain Parts
8-5.Service Centers
8-1.Introduction
8-3.Manual Status Information
8-6.Parts Lists
Assembly Name
Table 8-2.Final Assembly
5725A
Parts Lists
Table 8-2.Final Assembly cont
List of Replaceable Parts
Table 8-2.Final Assembly cont
5725A
Instruction Manual
TM1 W1 W13 W14 W15 W16 W44 XF501
Parts Lists
Figure 8-1.Final Assembly
List of Replaceable Parts
aq24f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
aq25f.tif
Parts Lists
Figure 8-1.Final Assembly cont
List of Replaceable Parts
aq26f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
aq27f.tif
Parts Lists
Figure 8-1.Final Assembly cont
List of Replaceable Parts
aq28f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
aq29f.tif
Parts Lists
Figure 8-1.Final Assembly cont
List of Replaceable Parts
aq30f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
aq31f.tif
Parts Lists
List of Replaceable Parts
Table 8-3.A1 Interconnect PCA
5725A
Instruction Manual
5725A-1611
Figure 8-2.A1 Interconnect PCA
Parts Lists
List of Replaceable Parts
Table 8-4.A2 Current Amplifier PCA
5725A
Instruction Manual
Table 8-4.A2 Current Amplifier PCA cont
Reference Description Designator
Parts Lists
List of Replaceable Parts
Table 8-4.A2 Current Amplifier PCA cont
R233,R237,R238 R273 R243,R244 R247,R248
5725A
5725A-1650
Figure 8-3.A2 Current Amplifier PCA
aq37f.eps
Parts Lists
List of Replaceable Parts
Table 8-5.A3 High Voltage Amplifier PCA
5725A
Table 8-5.A3 High Voltage Amplifier PCA cont
Parts Lists
List of Replaceable Parts
Table 8-5.A3 High Voltage Amplifier PCA cont
R640,R642 R641,R648 R643 R647 R651 R654,R661,R684
5725A
Instruction Manual
5725A-1661
Figure 8-4.A3 High Voltage Amplifier PCA
Parts Lists
Table 8-6.A4 Power Supply PCA
List of Replaceable Parts
Reference Designator
Table 8-6.A4 Power Supply PCA cont
5725A
Instruction Manual
Reference
Parts Lists
Table 8-6.A4 Power Supply PCA cont
List of Replaceable Parts
R351 R355 R361,R362
Figure 8-5.A4 Power Supply PCA
5725A
Instruction Manual
5725A-1631
Parts Lists
List of Replaceable Parts
Table 8-7.A5 Digital PCA
Reference
5725A
Instruction Manual
5725A-1650
Figure 8-6.A5 Digital PCA
Parts Lists
List of Replaceable Parts
Table 8-8.A6 High Voltage Sense PCA
5725A
Instruction Manual
Table 8-8.A6 High Voltage Sense PCA cont
Parts Lists
List of Replaceable Parts
Table 8-8.A6 High Voltage Sense PCA cont
R154 R155 R156,R158,R168 R173 R162 R171 R172,R175
5725A
Instruction Manual
5725A-1601
Figure 8-7.A6 High Voltage Sense PCA
Parts Lists
Table 8-9.A12 Transformer Enclosure Assembly
List of Replaceable Parts
Figure 8-8.A12 Transformer Enclosure Assembly
5725A
aq32f.tif
Parts Lists
List of Replaceable Parts
aq33f.tif
5725A
Instruction Manual
aq34f.tif
Parts Lists
List of Replaceable Parts
aq35f.tif
5725A
Instruction Manual
Table 8-10.A30 Inductor PCA
Figure 8-9.A30 Inductor PCA
Schematic Diagrams
Chapter
5725A
Schematic Diagrams
5725A-1611
Figure 9-1.A1 Interconnect PCA
aq48f.eps
5725A
Instruction Manual
Figure 9-1.A1 Interconnect PCA cont
Schematic Diagrams
Figure 9-1.A1 Interconnect PCA cont
5725A
Instruction Manual
Figure 9-2.A2 Current Amplifier PCA
5725A-1650
Schematic Diagrams
Figure 9-2.A2 Current Amplifier PCA cont
5725A
Instruction Manual
Figure 9-2.A2 Current Amplifier PCA cont
Schematic Diagrams
Figure 9-2.A2 Current Amplifier PCA cont
5725A
Instruction Manual
Figure 9-3.A3 High Voltage Amplifier PCA
5725A-1661
Schematic Diagrams
Figure 9-3.A3 High Voltage Amplifier PCA cont
5725A
Instruction Manual
Figure 9-3.A3 High Voltage Amplifier PCA cont
Schematic Diagrams
Figure 9-4.A4 Power Supply PCA
aq59f.eps
Figure 9-4.A4 Power Supply PCA cont
5725A
Instruction Manual
Schematic Diagrams
Figure 9-4.A4 Power Supply PCA cont
AT PINS 12 AND 13 OF U507
5725A
Instruction Manual
TYPICAL COMMUNICATIONS ACTIVITY
Schematic Diagrams
Figure 9-5.A5 Digital PCA cont
5725A
Instruction Manual
STANDBY
VOLTAGE STANDBY
Schematic Diagrams
Figure 9-6.A6 High Voltage Sense PCA cont
5725A
Instruction Manual
Figure 9-6.A6 High Voltage Sense PCA cont
Schematic Diagrams
Figure 9-6.A6 High Voltage Sense PCA cont
5725A
Instruction Manual
Figure 9-6.A6 High Voltage Sense PCA cont
Schematic Diagrams
Figure 9-7.A12 Transformer Enclosure Assembly
aq45f.eps
5725A
Instruction Manual
Index
5725A
Page
5725A