5725A
Limited Warranty and Limitation of Liability
Table of Contents
5725A
Calibration and Verification
Schematic Diagrams
List of Tables
5725A
List of Figures
Viii
Interference Information
Page
Operator Safety Summary
Symbols Marked on Equipment
Servicing Safety Summary
First AID for Electric Shock
Introduction and Specifications
5725A
Introduction
Where to Go From Here
Getting Started Manual
How to Use the Manuals
A/5720A Series II Operator Reference Guide
A/5720A Series II Remote Programming Reference Guide
Specifications
5720A 99%
DC Voltage Specifications
99 % Confidence Level
Range Resolution
95 % Confidence Level
Overshoot 5 % Common mode rejection 140 dB, DC to 400 Hz
A Series II AC Voltage Specifications 99 % Confidence Level
AC Voltage Specifications
Range Resolution Frequency Absolute Uncertainty
A Series II AC Voltage Specifications 95 % Confidence Level
Relative Uncertainty ± 1 C
Hours Days ± ppm output + μV
Frequency Absolute Uncertainty
99 % Conf idence Level
Hours Days Year ± ppm output + μV
Relative Uncertainty ± 1 C Hours
95% Confidence Level
Stability ± 1 C Note Hours
Range Frequency
±ppm output/C
±% output
Stability ±1 C Note Hours ±ppm output + mV
Temperature Coefficient Adder 10-40 C 10 C
99% Confidence Level
Resistance Specifications
Nominal Absolute Uncertainty of Characterized Value
Hours Days Year Relative Uncertainty ±1 C
Resistance Specifications
Nominal Value
Two-Wire Adder
Stability
Maximum Peak Current
Four-Wire
Two-Wire Comp
12. Current Derating Factors
Value of Derating Factor K for Over or Under Current
Relative Uncertainty ±1 C
DC Current Specifications
Hours Days ± ppm output + nA ± ppm output + μA
Days ± ppm output + nA ± ppm output + μA
Overshoot 5 %
Absolute Uncertainty Relative Uncertainty Resolution
AC Current Specifications
Hours Days ± ppm output + nA Year
Relative Uncertainty ±1 C Hours Days ± ppm output + nA Year
22 mA 10 nA 100 nA 650 350 120 1k 5 k 500 05k 10 k 1500
Relative Uncertainty ±1 C Hours Days Year ± ppm output + nA
10-40 C 40-50 C ± ppm output + nA/C
Stability ±1 C Note
For Full Accuracy
Bandwidth 10 Hz-50 kHz 0.5V Burden ± % output + μA
21. Wideband AC Voltage Option 5700-03 Specifications
Wideband AC Voltage Option 5700-03 Specifications
Guard isolation 20
General Specifications
Size
Frequency
Auxiliary Amplifier Specifications
Day Accuracy at 23 ±5 C ± % output + % range
Accuracy
Installation
5725A
Standard Equipment
Unpacking and Inspection
Model or Part Number
Line Power Cords Available for Fluke Instruments
Line Power Cord Types Available from Fluke
Placement and Rack Mounting
Service Information
Cooling Considerations
5700A
Connecting to the 5700A Calibrator
5700A 5725A
100V 110V F8A 115V
Selecting Line Voltage
120V S2 S3 S4 200V 220V 230V F4A
Accessing the Fuse
Accessing the Fuse
Connecting to Line Power
5725A
Operating Notes
5725A
Operating Notes
Front Panel Features
Front Panel Features
5725A Standby Indicator
Front Panel Features Current Output Binding Posts
Current Mode Indicator
Voltage Mode Indicator
Rear Panel Features
Rear Panel Features
Calibration Switch
Rear Panel Features Current Output Binding Posts
5700A Calibrator Connector
Line Voltage Selection Switches
Warm Up
Turning on the 5725A Amplifier
Standby
Operating Functions and Modes
Voltage Standby
Voltage Standby Mode
Current Standby
Current Standby Mode
Voltage Operate
Voltage Operate Mode
Current Operate
Current Operate Mode
Conditions That Activate the 5725A
Theory of Operation
High Voltage Heat Sink Assemblies
Overall Functional Description
A Overall Block Diagram
AC Range Functional Description
Range Functional Description
Operation in the 11A AC Range
Operation in the 11A DC Range
Voltage and Current Standby Modes
Voltage Standby
Description of the Out-Guard Lines 5725A Side
How the 5700A and 5725A Communicate
∙ B-RCL
Description of the In-Guard Lines
∙ B-FEEDBACK
Functional Summaries by Assembly
Detailed Circuit Description
Interconnect Assembly A1
Power Supply Assembly A4
Internal Fuse Data
High Voltage Supply Section
Switching Section
System Supply Section
Current-Limit Section
Fan Supply Section
Digital Assembly A5
Microcomputer
External RAM
Digital Assembly Block Diagram
Data Latch
Eerom
Strobe Lines
Led Driver
Watchdog Timer
Power Up and Reset Circuitry
Current Amplifier Assembly A2
Break-Detect Circuitry
Current Amplifier Assembly Block Diagram
Error Amplifier Section
Monitor Section
Output Stage Section
Power Supply Section
Control and Switching Section
Input Amplifier
High Voltage Amplifier A3
High Voltage Amplifier Assembly Block Diagram
Window Comparator
Integrator
Input Clamp
Midstage
Transconductance and Cascode Stage
Midstage -400V Filter
High Voltage Heat Sink Assemblies
Autobias Sense Circuit
Autobias Current Source
Temperature Monitoring
Signal Transformers
Signal Transformer Usage
High Voltage Amplifier Feedback
High Voltage Sense Assembly A6
High Voltage Sense Assembly Block Diagram
Sense Amplifier Section
High-Quality Reference Name Destination
Destination Assembly
Analog Monitor Section
Signals Monitored by the Analog Monitor Section
Serial Interface/Guard Crossing Section
Analog Input Switching Section
Control Section
AC Line Voltage Selection Section
5725A
Calibration and Verification
5725A
Where to Find Further Information
5725A
Static awareness
Dow Chemical
Maintenance
5725A
Replacing the Fuse
Cleaning the Air Filter
Cleaning PCA’s
General Cleaning
Assembly Location Diagram
Access Procedures
Initial Access Procedure
TP304 TP301
TP307
CR317
CR318
Accessing the Digital Assembly A5
Accessing the Power Supply Assembly A4
When Reinstalling Digital Assembly
Accessing the Current Amplifier Assembly A2
Correct Way to Dress Cables
Accessing the High Voltage Amplifier A3
Accessing the High Voltage Sense Assembly A6
Accessing the Interconnect Assembly A1
Accessing the High Voltage Output Transistors
Enabling Front or Rear Binding Posts
Enabling Front or Rear Binding Posts
Troubleshooting
5725A
Self Diagnostics
Fault Codes
Fault Message Explanation
A Fault Codes
Self Diagnostics
Manual Tests for Fault Isolation
Fault no Message
Analog Monitor Faults
Problem 3 Fault When Entering Voltage Operate
Reduced-Voltage Troubleshooting Mode
Problem 4 Fault When Entering Current Standby
Problem 5 Fault When Entering Current Operate
Testing the Power Supply By Itself
5725A
List of Replaceable Parts
5725A
Introduction
Final Assembly
Manual Status Information Assembly Name Fluke Part No
Ref or Option No
Revision Level
List of Replaceable Parts Parts Lists
TM1
Aq24f.tif
Aq25f.tif
Aq26f.tif
Aq27f.tif
Aq28f.tif
Aq29f.tif
Aq30f.tif
Aq31f.tif
A1 Interconnect PCA
5725A-1611
A2 Current Amplifier PCA
Reference Description Designator Fluke Stock Tot Qty
ZENER,UNCOMP,6.8V,5%,20.0MA,0
5725A-1650
A3 High Voltage Amplifier PCA
Reference Description Designator Fluke Stock Tot Qty
List of Replaceable Parts Parts Lists
5725A-1661
Description Fluke Stock
A4 Power Supply PCA
Designator
Reference Description
HARNESS, High Voltage Supply
5725A-1631
Reference
A5 Digital PCA
Description Fluke Stock Tot Qty Designator
5725A-1650
A6 High Voltage Sense PCA
Reference Description Designator Fluke Stock Tot Qty
ZENER,UNCOMP,3.3V,5%,20.0MA,0 ZENER,UNCOMP,5.1V,5%,20.0MA,0
5725A-1601
A12 Transformer Enclosure Assembly
Aq32f.tif
Aq33f.tif
Aq34f.tif
Aq35f.tif
A30 Inductor PCA
10. A30 Inductor PCA
Schematic Diagrams
5725A
5725A-1611
5725A
Schematic Diagrams
5725A-1650
Schematic Diagrams
5725A
Schematic Diagrams
5725A-1661
Schematic Diagrams
5725A
Aq59f.eps
5725A
Schematic Diagrams
10 ms
AT Pins 12 and 13 of U507 5725A-1650
Schematic Diagrams
5725A-1601
Schematic Diagrams
5725A
Schematic Diagrams
5725A
Aq45f.eps
5725A
Index
5725A STANDBY, 3-5CABLE OFF, 3-5CURRENT MODE, 3-5FAULT
Chassis GROUND, 3-7CURRENT OUTPUT, 3-5,3-7HI, 3-5,3-7
5725A