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5725A instruction manual Schematic Diagrams, 2.A2 Current Amplifier PCA cont
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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 175
Image 175
Schematic Diagrams
9
Figure
9-2.
A2 Current Amplifier PCA (cont)
9-9
Page 174
Page 176
Page 175
Image 175
Page 174
Page 176
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
Terms in this Manual
OPERATOR SAFETY SUMMARY
HIGH VOLTAGE
LETHAL VOLTAGE
Use the Proper Fuse
Symbols Marked on Equipment
Power Source
Use the Proper Power Cord
Use Care When Servicing With Power On
SERVICING SAFETY SUMMANY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Do Not Service Alone
Never Accept Ordinary and General Tests for Death
FIRST AID FOR ELECTRIC SHOCK
Free the Victim From the Live Conductor
Get Help
Chapter
Introduction and Specifications
Instruction Manual
5725A
Introduction
Where to Go From Here
5700A Operator Reference Guide
How to Use the Manuals
5725A Instruction Manual
5700A Operator Manual
5700A Service Manual
Specifications
±5C from calibration temperature
Introduction and Specifications
Specifications
DC Voltage Range Resolution
Instruction Manual
5725A
AC Voltage
Specifications
Introduction and Specifications
AC Voltage continued
Voltage Range
5725A
Instruction Manual
AC Voltage continued
Temperature
Introduction and Specifications
Specifications
±5C from calibration temperatureNote
5725A Instruction Manual
Two-WireComp
Four-Wire
Four-Wire
Specifications
Introduction and Specifications
DC Current
Instruction Manual
5725A
AC Current
Specifications
Introduction and Specifications
AC Current continued
Instruction Manual
Resolution
Resolution
5725A
Temperature performance: Operating: 0C to 50C
Introduction and Specifications
Specifications
General Specifications
Instruction Manual
5725A
Connecting to the 5700A Calibrator
Installation
Service Information
Placement and Rack Mounting
Instruction Manual
5725A
Installation
Unpacking and Inspection
Introduction
VOLTAGE/CURRENT
5725A
Instruction Manual
TYPE
Service Information
Service Information
Placement and Rack Mounting
Cooling Considerations
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
5725A
Front Panel Features
Figure 3-1.Front Panel Features
POWER
5725A STANDBY Indicator
A B C D E F G H
Rear Panel Features
Table 3-1.Front Panel Features
Instruction Manual
Rear Panel Features
Figure 3-2.Rear Panel Features
5725A
5700A CALIBRATOR Connector
A B C D E F G H I
Table 3-2.Rear Panel Features
CALIBRATION Switch
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 Feedback
High Voltage Sense Assembly A6
High Voltage Amplifier A3
High Voltage Heat Sink Assemblies
Introduction
Overall Functional Description
5725A
Figure 4-1.5725A Overall Block Diagram
Instruction Manual
1100V AC Range Functional Description
11A Range Functional Description
Voltage Standby
Operation in the 11A DC Range
Operation in the 11A AC Range
Voltage and Current Standby Modes
4-11
How the 5700A and 5725A Communicate
4-10
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
Detailed Circuit Description
4-14
4-16
Power Supply Assembly A4
REF DES
High Voltage Supply Section
4-17
ASSEMBLY
4-18
Switching Section
4-20
Current-LimitSection
4-19
System Supply Section
4-22
Digital Assembly A5
Fan Supply Section
4-21
aq19f.eps
Figure 4-2.Digital Assembly Block Diagram
Theory of Operation
Detailed Circuit Description
4-27
EEROM
4-26
Data Latch
Break-DetectCircuitry
Power Up and Reset Circuitry
Watchdog Timer
Current Amplifier Assembly A2
Instruction Manual
5725A
aq20f.eps
4-35
Error Amplifier Section
4-37
Output Stage Section
4-36
Monitor Section
4-39
Control and Switching Section
Power Supply Section
4-38
4-41
High Voltage Amplifier A3
4-40
Input Amplifier
Detailed Circuit Description
Theory of Operation
aq22f.eps
4-43
Integrator
4-42
Window Comparator
4-46
Transconductance and Cascode Stage
4-45
Midstage
4-50
Autobias Current Source
4-49
Autobias Sense Circuit
4-51
Signal Transformers
Temperature Monitoring
High Voltage Amplifier Feedback
4-54
High Voltage Sense Assembly A6
Detailed Circuit Description
Theory of Operation
aq21f.eps
4-55
Sense Amplifier Section
±3.2V during calibration
STANDBY VOLTAGE LIMITS1
Analog Monitor Section
4-56
SIGNAL
4-58
Analog Input Switching Section
Serial Interface/Guard Crossing Section
4-57
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
B. BOTTOM VIEW
Access Procedures
Figure 6-3.Assembly Location Diagram
A. TOP VIEW
wWarning
Initial Access Procedure
HIGH VOLTAGE
Accessing the Digital Assembly A5
Accessing the Power Supply Assembly A4
Instruction Manual
WHEN REINSTALLING DIGITAL ASSEMBLY
Figure 6-5.Accessing the Digital Assembly
5725A
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 High Voltage Output Transistors
Accessing the Interconnect Assembly A1
6-13
6-15
Enabling Front or Rear Binding Posts
9.Reinstall the top cover
Chapter
Troubleshooting
Instruction Manual
5725A
Self Diagnostics
5725A Fault Codes
Introduction
MESSAGE
Table 7-1.5725A Fault Codes
FAULT
5725A Instruction Manual
MESSAGE
Self Diagnostics
Table 7-1.5725A Fault Codes cont
FAULT
Manual Tests for Fault Isolation
MESSAGE
Manual Tests for Fault Isolation
Table 7-2.Analog Monitor Faults
FAULT NO
Problem 5 Fault When Entering Current Operate
Reduced-VoltageTroubleshooting Mode
Problem 3: Fault When Entering Voltage Operate
Problem 4: Fault When Entering Current Standby
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
Introduction
How to Obtain Parts
Manual Status Information
Newer Instruments
5725A
Service Centers
Assembly Name
Table 8-1.Final Assembly
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
aq26f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq27f.tif
aq28f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq29f.tif
aq30f.tif
Figure 8-1.Final Assembly cont
5725A
Instruction Manual
List of Replaceable Parts
Figure 8-1.Final Assembly cont
aq31f.tif
Table 8-2.A1 Interconnect PCA
5725A
aq36f.eps
List of Replaceable Parts
5725A-1611
Figure 8-2.A1 Interconnect PCA
Instruction Manual
5725A
Table 8-3.A2 Current Amplifier PCA
Table 8-3.A2 Current Amplifier PCA cont
List of Replaceable Parts
Reference Description Designator
5725A
Instruction Manual
Table 8-3.A2 Current Amplifier PCA cont
aq37f.eps
List of Replaceable Parts
5725A-1650
Figure 8-3.A2 Current Amplifier PCA
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
R640,R642
5725A
Instruction Manual
Table 8-4.A3 High Voltage Amplifier PCA cont
aq38f.eps
List of Replaceable Parts
5725A-1661
Figure 8-4.A3 High Voltage Amplifier PCA
5725A
Table 8-5.A4 Power Supply PCA
Instruction Manual
List of Replaceable Parts
Table 8-5.A4 Power Supply PCA cont
R351 R355 R361,R362
Table 8-5.A4 Power Supply PCA cont
5725A
Instruction Manual
aq39f.eps
Figure 8-5.A4 Power Supply PCA
List of Replaceable Parts
5725A-1631
Instruction Manual
5725A
Table 8-6.A5 Digital PCA
aq40f.eps
List of Replaceable Parts
5725A-1650
Figure 8-6.A5 Digital PCA
Table 8-7.A6 High Voltage Sense PCA
5725A
Table 8-7.A6 High Voltage Sense PCA cont
List of Replaceable Parts
R154 R155 R156,R158,R168 R173 R162 R171 R172,R175
5725A
Instruction Manual
Table 8-7.A6 High Voltage Sense PCA cont
aq41f.eps
List of Replaceable Parts
5725A-1601
Figure 8-7.A6 High Voltage Sense PCA
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
Figure 8-9.A30 Inductor PCA
List of Replaceable Parts
Table 8-9.A30 Inductor PCA
5725A-1603
5725A
Chapter
Schematic Diagrams
Instruction Manual
5725A
aq48f.eps
Schematic Diagrams
5725A-1611
Figure 9-1.A1 Interconnect PCA
Instruction Manual
5725A
Figure 9-1.A1 Interconnect PCA cont
Figure 9-1.A1 Interconnect PCA cont
Schematic Diagrams
5725A-1650
5725A
Instruction Manual
Figure 9-2.A2 Current Amplifier PCA
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
5725A-1661
5725A
Instruction Manual
Figure 9-3.A3 High Voltage Amplifier PCA
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
TYPICAL COMMUNICATIONS ACTIVITY
AT PINS 12 AND 13 OF U507
5725A
Instruction Manual
Figure 9-5.A5 Digital PCA cont
Schematic Diagrams
VOLTAGE STANDBY
5725A
Instruction Manual
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