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5725A instruction manual Instruction Manual
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5725A
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Troubleshooting
Specs
Install
Error codes
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 190
Image 190
5725A
Instruction Manual
9-24
Page 189
Page 191
Page 190
Image 190
Page 189
Page 191
Contents
Instruction Manual
5725A
Amplifier
Page
Table of Contents
5725A
Theory of Operation
Calibration and Verification
5725A
Instruction Manual
Table
List of Tables
Title
5725A
Instruction Manual
Figure
List of Figures
Title
viii
5725A
Instruction Manual
Declaration of the Manufacturer or Importer
Interference Information
Bescheinigung des Herstellers/Importeurs
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 SUMMANY
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
Introduction
Where to Go From Here
5700A Operator Manual
How to Use the Manuals
5725A Instruction Manual
5700A Operator Reference Guide
Specifications
5700A Service Manual
DC Voltage Range Resolution
Introduction and Specifications
Specifications
±5C from calibration temperature
Instruction Manual
5725A
AC Voltage
Specifications
Introduction and Specifications
AC Voltage continued
AC Voltage continued
5725A
Instruction Manual
Voltage Range
±5C from calibration temperatureNote
Introduction and Specifications
Specifications
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
5725A
Resolution
Resolution
Instruction Manual
General Specifications
Introduction and Specifications
Specifications
Temperature performance: Operating: 0C to 50C
5725A
Instruction Manual
Placement and Rack Mounting
Installation
Service Information
Connecting to the 5700A Calibrator
5725A
Instruction Manual
Installation
Unpacking and Inspection
Introduction
TYPE
5725A
Instruction Manual
VOLTAGE/CURRENT
Cooling Considerations
Service Information
Placement and Rack Mounting
Service Information
Connecting to the 5700A Calibrator
Figure 2-2.Correct Way to Dress Interface Cable
Selecting Line Voltage
Selecting Line Voltage
Accessing the Fuse
wCaution
Connecting to Line Power
Connecting to Line Power
5725A
Instruction Manual
Operating Notes
Chapter
5725A
Instruction Manual
Introduction
Operating Notes
POWER
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
Rear Panel Features
Figure 3-2.Rear Panel Features
Instruction Manual
CALIBRATION Switch
A B C D E F G H I
Table 3-2.Rear Panel Features
5700A CALIBRATOR Connector
Turning on the 5725A Amplifier
Warm Up
5725A Operating Functions and Modes
Standby
Voltage Standby
Current Standby
5725A Operating Functions and Modes
Voltage Operate
3-10
3-11
Current Operate
Conditions That Activate the 5725A
Conditions That Activate the 5725A
3-12
Theory of Operation
Chapter
High Voltage Heat Sink Assemblies
High Voltage Sense Assembly A6
High Voltage Amplifier A3
High Voltage Amplifier Feedback
Overall Functional Description
Introduction
5725A
Figure 4-1.5725A Overall Block Diagram
Instruction Manual
1100V AC Range Functional Description
11A Range Functional Description
Voltage and Current Standby Modes
Operation in the 11A DC Range
Operation in the 11A AC Range
Voltage Standby
Description of the Out-GuardLines 5725A Side
How the 5700A and 5725A Communicate
4-10
4-11
Description of the In-GuardLines
4-12
Functional Summaries by Assembly
4-13
4-14
Interconnect Assembly A1
Detailed Circuit Description
4-15
Power Supply Assembly A4
4-16
ASSEMBLY
High Voltage Supply Section
4-17
REF DES
Switching Section
4-18
System Supply Section
Current-LimitSection
4-19
4-20
4-21
Digital Assembly A5
Fan Supply Section
4-22
Detailed Circuit Description
Figure 4-2.Digital Assembly Block Diagram
Theory of Operation
aq19f.eps
Data Latch
EEROM
4-26
4-27
Current Amplifier Assembly A2
Power Up and Reset Circuitry
Watchdog Timer
Break-DetectCircuitry
Instruction Manual
5725A
aq20f.eps
Error Amplifier Section
4-35
Monitor Section
Output Stage Section
4-36
4-37
4-38
Control and Switching Section
Power Supply Section
4-39
Input Amplifier
High Voltage Amplifier A3
4-40
4-41
Detailed Circuit Description
Theory of Operation
aq22f.eps
Window Comparator
Integrator
4-42
4-43
Midstage
Transconductance and Cascode Stage
4-45
4-46
Autobias Sense Circuit
Autobias Current Source
4-49
4-50
High Voltage Amplifier Feedback
Signal Transformers
Temperature Monitoring
4-51
High Voltage Sense Assembly A6
4-54
Detailed Circuit Description
Theory of Operation
aq21f.eps
Sense Amplifier Section
4-55
±3.2V during calibration
SIGNAL
Analog Monitor Section
4-56
STANDBY VOLTAGE LIMITS1
4-57
Analog Input Switching Section
Serial Interface/Guard Crossing Section
4-58
Control Section
4-59
AC Line Voltage Selection Section
4-60
5725A
Instruction Manual
Calibration and Verification
Chapter
5725A
Instruction Manual
Introduction
Where to Find Further Information
Calibration and Verification
5725A
Instruction Manual
Maintenance
Chapter
5725A
Instruction Manual
Replacing the Fuse
Introduction
Cleaning the Air Filter
Cleaning PCA’s
General Cleaning
General Cleaning
A. TOP VIEW
Access Procedures
Figure 6-3.Assembly Location Diagram
B. BOTTOM VIEW
Initial Access Procedure
wWarning
HIGH VOLTAGE
Accessing the Power Supply Assembly A4
Accessing the Digital Assembly A5
5725A
WHEN REINSTALLING DIGITAL ASSEMBLY
Figure 6-5.Accessing the Digital Assembly
Instruction Manual
Accessing the Current Amplifier Assembly A2
6-10
6-11
Accessing the High Voltage Amplifier A3
Figure 6-6.Correct Way to Dress Cables
Accessing the High Voltage Sense Assembly A6
6-12
6-13
Accessing the High Voltage Output Transistors
Accessing the Interconnect Assembly A1
6-14
Enabling Front or Rear Binding Posts
6-15
9.Reinstall the top cover
Troubleshooting
Chapter
5725A
Instruction Manual
Self Diagnostics
5725A Fault Codes
Introduction
5725A Instruction Manual
Table 7-1.5725A Fault Codes
FAULT
MESSAGE
FAULT
Self Diagnostics
Table 7-1.5725A Fault Codes cont
MESSAGE
Manual Tests for Fault Isolation
FAULT NO
Manual Tests for Fault Isolation
Table 7-2.Analog Monitor Faults
MESSAGE
Problem 4: Fault When Entering Current Standby
Reduced-VoltageTroubleshooting Mode
Problem 3: Fault When Entering Voltage Operate
Problem 5 Fault When Entering Current Operate
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
Newer Instruments
How to Obtain Parts
Manual Status Information
Introduction
Table 8-1.Final Assembly
Service Centers
Assembly Name
5725A
Table 8-1.Final Assembly cont
List of Replaceable Parts
5725A
Figure 8-1.Final Assembly
aq24f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq25f.tif
Instruction Manual
Figure 8-1.Final Assembly cont
5725A
aq26f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq27f.tif
Instruction Manual
Figure 8-1.Final Assembly cont
5725A
aq28f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq29f.tif
Instruction Manual
Figure 8-1.Final Assembly cont
5725A
aq30f.tif
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq31f.tif
5725A
Table 8-2.A1 Interconnect PCA
Figure 8-2.A1 Interconnect PCA
List of Replaceable Parts
5725A-1611
aq36f.eps
Instruction Manual
5725A
Table 8-3.A2 Current Amplifier PCA
List of Replaceable Parts
Table 8-3.A2 Current Amplifier PCA cont
Table 8-3.A2 Current Amplifier PCA cont
5725A
Instruction Manual
Reference Description Designator
Figure 8-3.A2 Current Amplifier PCA
List of Replaceable Parts
5725A-1650
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
Table 8-4.A3 High Voltage Amplifier PCA cont
5725A
Instruction Manual
R640,R642
Figure 8-4.A3 High Voltage Amplifier PCA
List of Replaceable Parts
5725A-1661
aq38f.eps
5725A
Table 8-5.A4 Power Supply PCA
Instruction Manual
Table 8-5.A4 Power Supply PCA cont
List of Replaceable Parts
Instruction Manual
Table 8-5.A4 Power Supply PCA cont
5725A
R351 R355 R361,R362
5725A-1631
Figure 8-5.A4 Power Supply PCA
List of Replaceable Parts
aq39f.eps
Instruction Manual
5725A
Table 8-6.A5 Digital PCA
Figure 8-6.A5 Digital PCA
List of Replaceable Parts
5725A-1650
aq40f.eps
5725A
Table 8-7.A6 High Voltage Sense PCA
List of Replaceable Parts
Table 8-7.A6 High Voltage Sense PCA cont
Table 8-7.A6 High Voltage Sense PCA cont
5725A
Instruction Manual
R154 R155 R156,R158,R168 R173 R162 R171 R172,R175
Figure 8-7.A6 High Voltage Sense PCA
List of Replaceable Parts
5725A-1601
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
5725A
aq33f.tif
List of Replaceable Parts
aq34f.tif
Instruction Manual
5725A
aq35f.tif
5725A-1603
List of Replaceable Parts
Table 8-9.A30 Inductor PCA
Figure 8-9.A30 Inductor PCA
5725A
Schematic Diagrams
Chapter
5725A
Instruction Manual
Figure 9-1.A1 Interconnect PCA
Schematic Diagrams
5725A-1611
aq48f.eps
Instruction Manual
5725A
Figure 9-1.A1 Interconnect PCA cont
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
Instruction Manual
5725A
Figure 9-2.A2 Current Amplifier PCA cont
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
Instruction Manual
5725A
Figure 9-3.A3 High Voltage Amplifier PCA cont
Figure 9-4.A4 Power Supply PCA
Schematic Diagrams
aq59f.eps
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
Instruction Manual
5725A
Figure 9-6.A6 High Voltage Sense PCA cont
Schematic Diagrams
Figure 9-6.A6 High Voltage Sense PCA cont
Instruction Manual
5725A
Figure 9-6.A6 High Voltage Sense PCA cont
Figure 9-7.A12 Transformer Enclosure Assembly
Schematic Diagrams
aq45f.eps
5725A
Instruction Manual
Index
5725A
Page
5725A
Instruction Manual
Manual Supplement
Change #1
rear