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5725A instruction manual Schematic Diagrams, 4.A4 Power Supply PCA cont
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5725A
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Troubleshooting
Specs
Install
Error messages
1.5725A Overall Block Diagram
Placement and Rack Mounting
Maintenance
Two-WireAdder active compensation Note Lead
Problem 3: Fault When Entering Voltage Operate
Power Up and Reset Circuitry
Page 181
Image 181
Schematic Diagrams
9
Figure
9-4.
A4 Power Supply PCA (cont)
9-15
Page 180
Page 182
Page 181
Image 181
Page 180
Page 182
Contents
Instruction Manual
5725A
Amplifier
Page
Table of Contents
Theory of Operation
5725A
Calibration and Verification
Instruction Manual
5725A
Table
List of Tables
Title
Instruction Manual
5725A
Figure
List of Figures
Title
viii
5725A
Instruction Manual
Declaration of the Manufacturer or Importer
Interference Information
Bescheinigung des Herstellers/Importeurs
Page
HIGH VOLTAGE
OPERATOR SAFETY SUMMARY
LETHAL VOLTAGE
Terms in this Manual
Power Source
Symbols Marked on Equipment
Use the Proper Power Cord
Use the Proper Fuse
FOR QUALIFIED SERVICE PERSONNEL ONLY
SERVICING SAFETY SUMMANY
Do Not Service Alone
Use Care When Servicing With Power On
Free the Victim From the Live Conductor
FIRST AID FOR ELECTRIC SHOCK
Get Help
Never Accept Ordinary and General Tests for Death
Chapter
Introduction and Specifications
Instruction Manual
5725A
Introduction
Where to Go From Here
5725A Instruction Manual
How to Use the Manuals
5700A Operator Manual
5700A Operator Reference Guide
5700A Service Manual
Specifications
Specifications
Introduction and Specifications
DC Voltage Range Resolution
±5C from calibration temperature
Instruction Manual
5725A
AC Voltage
Specifications
Introduction and Specifications
AC Voltage continued
Instruction Manual
5725A
AC Voltage continued
Voltage Range
Specifications
Introduction and Specifications
±5C from calibration temperatureNote
Temperature
Four-Wire
Two-WireComp
Four-Wire
5725A Instruction Manual
Specifications
Introduction and Specifications
DC Current
Instruction Manual
5725A
AC Current
Specifications
Introduction and Specifications
AC Current continued
Resolution
Resolution
5725A
Instruction Manual
Specifications
Introduction and Specifications
General Specifications
Temperature performance: Operating: 0C to 50C
Instruction Manual
5725A
Service Information
Installation
Placement and Rack Mounting
Connecting to the 5700A Calibrator
Instruction Manual
5725A
Installation
Unpacking and Inspection
Introduction
Instruction Manual
5725A
TYPE
VOLTAGE/CURRENT
Placement and Rack Mounting
Service Information
Cooling Considerations
Service Information
Figure 2-2.Correct Way to Dress Interface Cable
Connecting to the 5700A Calibrator
Selecting Line Voltage
Selecting Line Voltage
wCaution
Accessing the Fuse
Connecting to Line Power
Connecting to Line Power
Instruction Manual
5725A
Chapter
Operating Notes
Instruction Manual
5725A
Operating Notes
Introduction
Figure 3-1.Front Panel Features
Front Panel Features
POWER
5725A
Rear Panel Features
A B C D E F G H
Table 3-1.Front Panel Features
5725A STANDBY Indicator
Figure 3-2.Rear Panel Features
Rear Panel Features
5725A
Instruction Manual
Table 3-2.Rear Panel Features
A B C D E F G H I
CALIBRATION Switch
5700A CALIBRATOR Connector
Warm Up
Turning on the 5725A Amplifier
Standby
5725A Operating Functions and Modes
Voltage Standby
5725A Operating Functions and Modes
Current Standby
3-10
Voltage Operate
3-11
Current Operate
Conditions That Activate the 5725A
3-12
Conditions That Activate the 5725A
Chapter
Theory of Operation
High Voltage Amplifier A3
High Voltage Sense Assembly A6
High Voltage Heat Sink Assemblies
High Voltage Amplifier Feedback
Introduction
Overall Functional Description
5725A
Figure 4-1.5725A Overall Block Diagram
Instruction Manual
1100V AC Range Functional Description
11A Range Functional Description
Operation in the 11A AC Range
Operation in the 11A DC Range
Voltage and Current Standby Modes
Voltage Standby
4-10
How the 5700A and 5725A Communicate
Description of the Out-GuardLines 5725A Side
4-11
4-12
Description of the In-GuardLines
4-13
Functional Summaries by Assembly
Detailed Circuit Description
Interconnect Assembly A1
4-14
4-15
4-16
Power Supply Assembly A4
4-17
High Voltage Supply Section
ASSEMBLY
REF DES
4-18
Switching Section
4-19
Current-LimitSection
System Supply Section
4-20
Fan Supply Section
Digital Assembly A5
4-21
4-22
Theory of Operation
Figure 4-2.Digital Assembly Block Diagram
Detailed Circuit Description
aq19f.eps
4-26
EEROM
Data Latch
4-27
Watchdog Timer
Power Up and Reset Circuitry
Current Amplifier Assembly A2
Break-DetectCircuitry
Instruction Manual
5725A
aq20f.eps
4-35
Error Amplifier Section
4-36
Output Stage Section
Monitor Section
4-37
Power Supply Section
Control and Switching Section
4-38
4-39
4-40
High Voltage Amplifier A3
Input Amplifier
4-41
Detailed Circuit Description
Theory of Operation
aq22f.eps
4-42
Integrator
Window Comparator
4-43
4-45
Transconductance and Cascode Stage
Midstage
4-46
4-49
Autobias Current Source
Autobias Sense Circuit
4-50
Temperature Monitoring
Signal Transformers
High Voltage Amplifier Feedback
4-51
4-54
High Voltage Sense Assembly A6
Detailed Circuit Description
Theory of Operation
aq21f.eps
4-55
Sense Amplifier Section
±3.2V during calibration
4-56
Analog Monitor Section
SIGNAL
STANDBY VOLTAGE LIMITS1
Serial Interface/Guard Crossing Section
Analog Input Switching Section
4-57
4-58
4-59
Control Section
4-60
AC Line Voltage Selection Section
Instruction Manual
5725A
Chapter
Calibration and Verification
Instruction Manual
5725A
Introduction
Where to Find Further Information
Calibration and Verification
Instruction Manual
5725A
Chapter
Maintenance
Instruction Manual
5725A
Introduction
Replacing the Fuse
Cleaning the Air Filter
Cleaning PCA’s
General Cleaning
General Cleaning
Figure 6-3.Assembly Location Diagram
Access Procedures
A. TOP VIEW
B. BOTTOM VIEW
wWarning
Initial Access Procedure
HIGH VOLTAGE
Accessing the Digital Assembly A5
Accessing the Power Supply Assembly A4
Figure 6-5.Accessing the Digital Assembly
WHEN REINSTALLING 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
Accessing the Interconnect Assembly A1
Accessing the High Voltage Output Transistors
6-13
6-14
6-15
Enabling Front or Rear Binding Posts
9.Reinstall the top cover
Chapter
Troubleshooting
Instruction Manual
5725A
Self Diagnostics
5725A Fault Codes
Introduction
FAULT
Table 7-1.5725A Fault Codes
5725A Instruction Manual
MESSAGE
Table 7-1.5725A Fault Codes cont
Self Diagnostics
FAULT
MESSAGE
Manual Tests for Fault Isolation
Table 7-2.Analog Monitor Faults
Manual Tests for Fault Isolation
FAULT NO
MESSAGE
Problem 3: Fault When Entering Voltage Operate
Reduced-VoltageTroubleshooting Mode
Problem 4: Fault When Entering Current Standby
Problem 5 Fault When Entering Current Operate
7-10
Testing the Power Supply By Itself
Testing the Power Supply By Itself
Instruction Manual
5725A
Chapter
List of Replaceable Parts
Instruction Manual
5725A
Manual Status Information
How to Obtain Parts
Newer Instruments
Introduction
Assembly Name
Service Centers
Table 8-1.Final Assembly
5725A
List of Replaceable Parts
Table 8-1.Final Assembly cont
5725A
Figure 8-1.Final Assembly
aq24f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq25f.tif
5725A
Figure 8-1.Final Assembly cont
Instruction Manual
aq26f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq27f.tif
5725A
Figure 8-1.Final Assembly cont
Instruction Manual
aq28f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq29f.tif
5725A
Figure 8-1.Final Assembly cont
Instruction Manual
aq30f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq31f.tif
Table 8-2.A1 Interconnect PCA
5725A
5725A-1611
List of Replaceable Parts
Figure 8-2.A1 Interconnect PCA
aq36f.eps
Instruction Manual
5725A
Table 8-3.A2 Current Amplifier PCA
Table 8-3.A2 Current Amplifier PCA cont
List of Replaceable Parts
Instruction Manual
5725A
Table 8-3.A2 Current Amplifier PCA cont
Reference Description Designator
5725A-1650
List of Replaceable Parts
Figure 8-3.A2 Current Amplifier PCA
aq37f.eps
Instruction Manual
5725A
Table 8-4.A3 High Voltage Amplifier PCA
Table 8-4.A3 High Voltage Amplifier PCA cont
List of Replaceable Parts
Designator
Instruction Manual
5725A
Table 8-4.A3 High Voltage Amplifier PCA cont
R640,R642
5725A-1661
List of Replaceable Parts
Figure 8-4.A3 High Voltage Amplifier PCA
aq38f.eps
5725A
Table 8-5.A4 Power Supply PCA
Instruction Manual
List of Replaceable Parts
Table 8-5.A4 Power Supply PCA cont
5725A
Table 8-5.A4 Power Supply PCA cont
Instruction Manual
R351 R355 R361,R362
List of Replaceable Parts
Figure 8-5.A4 Power Supply PCA
5725A-1631
aq39f.eps
Instruction Manual
5725A
Table 8-6.A5 Digital PCA
5725A-1650
List of Replaceable Parts
Figure 8-6.A5 Digital PCA
aq40f.eps
Table 8-7.A6 High Voltage Sense PCA
5725A
Table 8-7.A6 High Voltage Sense PCA cont
List of Replaceable Parts
Instruction Manual
5725A
Table 8-7.A6 High Voltage Sense PCA cont
R154 R155 R156,R158,R168 R173 R162 R171 R172,R175
5725A-1601
List of Replaceable Parts
Figure 8-7.A6 High Voltage Sense PCA
aq41f.eps
5725A
Table 8-8.A12 Transformer Enclosure Assembly
Instruction Manual
List of Replaceable Parts
Figure 8-8.A12 Transformer Enclosure Assembly
aq32f.tif
aq33f.tif
5725A
aq34f.tif
List of Replaceable Parts
Instruction Manual
5725A
aq35f.tif
Table 8-9.A30 Inductor PCA
List of Replaceable Parts
5725A-1603
Figure 8-9.A30 Inductor PCA
5725A
Chapter
Schematic Diagrams
Instruction Manual
5725A
5725A-1611
Schematic Diagrams
Figure 9-1.A1 Interconnect PCA
aq48f.eps
Instruction Manual
5725A
Figure 9-1.A1 Interconnect PCA cont
Figure 9-1.A1 Interconnect PCA cont
Schematic Diagrams
Instruction Manual
5725A
Figure 9-2.A2 Current Amplifier PCA
5725A-1650
Figure 9-2.A2 Current Amplifier PCA cont
Schematic Diagrams
Instruction Manual
5725A
Figure 9-2.A2 Current Amplifier PCA cont
Figure 9-2.A2 Current Amplifier PCA cont
Schematic Diagrams
Instruction Manual
5725A
Figure 9-3.A3 High Voltage Amplifier PCA
5725A-1661
Figure 9-3.A3 High Voltage Amplifier PCA cont
Schematic Diagrams
Instruction Manual
5725A
Figure 9-3.A3 High Voltage Amplifier PCA cont
Figure 9-4.A4 Power Supply PCA
Schematic Diagrams
aq59f.eps
5725A
Figure 9-4.A4 Power Supply PCA cont
Figure 9-4.A4 Power Supply PCA cont
Schematic Diagrams
5725A
AT PINS 12 AND 13 OF U507
Instruction Manual
TYPICAL COMMUNICATIONS ACTIVITY
Figure 9-5.A5 Digital PCA cont
Schematic Diagrams
Instruction Manual
5725A
STANDBY
VOLTAGE STANDBY
Figure 9-6.A6 High Voltage Sense PCA cont
Schematic Diagrams
Instruction Manual
5725A
Figure 9-6.A6 High Voltage Sense PCA cont
Figure 9-6.A6 High Voltage Sense PCA cont
Schematic Diagrams
Instruction Manual
5725A
Figure 9-6.A6 High Voltage Sense PCA cont
Figure 9-7.A12 Transformer Enclosure Assembly
Schematic Diagrams
aq45f.eps
Instruction Manual
5725A
Index
5725A
Page
Instruction Manual
5725A
Manual Supplement
rear
Change #1