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