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
Specifications
A/5720A Series II Remote Programming Reference Guide
DC Voltage Specifications
5720A 99%
99 % Confidence Level
Range Resolution
95 % Confidence Level
Overshoot 5 % Common mode rejection 140 dB, DC to 400 Hz
AC Voltage Specifications
A Series II AC Voltage Specifications 99 % Confidence Level
Relative Uncertainty ± 1 C
A Series II AC Voltage Specifications 95 % Confidence Level
Range Resolution Frequency Absolute Uncertainty
Hours Days ± ppm output + μV
Hours Days Year ± ppm output + μV
99 % Conf idence Level
Frequency Absolute Uncertainty
Relative Uncertainty ± 1 C Hours
95% Confidence Level
±ppm output/C
Range Frequency
Stability ± 1 C Note Hours
±% output
Temperature Coefficient Adder 10-40 C 10 C
Stability ±1 C Note Hours ±ppm output + mV
Nominal Absolute Uncertainty of Characterized Value
Resistance Specifications
99% Confidence Level
Hours Days Year Relative Uncertainty ±1 C
Resistance Specifications
Stability
Two-Wire Adder
Nominal Value
Maximum Peak Current
12. Current Derating Factors
Two-Wire Comp
Four-Wire
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
For Full Accuracy
Stability ±1 C Note
10-40 C 40-50 C ± ppm output + nA/C
Bandwidth 10 Hz-50 kHz 0.5V Burden ± % output + μA
Wideband AC Voltage Option 5700-03 Specifications
21. Wideband AC Voltage Option 5700-03 Specifications
Guard isolation 20
General Specifications
Size
Day Accuracy at 23 ±5 C ± % output + % range
Auxiliary Amplifier Specifications
Frequency
Accuracy
Installation
5725A
Standard Equipment
Unpacking and Inspection
Model or Part Number
Line Power Cord Types Available from Fluke
Line Power Cords Available for Fluke Instruments
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
Current Mode Indicator
Front Panel Features Current Output Binding Posts
5725A Standby Indicator
Voltage Mode Indicator
Rear Panel Features
Rear Panel Features
5700A Calibrator Connector
Rear Panel Features Current Output Binding Posts
Calibration Switch
Line Voltage Selection Switches
Turning on the 5725A Amplifier
Warm Up
Operating Functions and Modes
Standby
Voltage Standby Mode
Voltage Standby
Current Standby Mode
Current Standby
Voltage Operate Mode
Voltage Operate
Current Operate Mode
Current Operate
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
Voltage and Current Standby Modes
Operation in the 11A DC Range
Operation in the 11A AC Range
Voltage Standby
How the 5700A and 5725A Communicate
Description of the Out-Guard Lines 5725A Side
Description of the In-Guard Lines
∙ B-RCL
Functional Summaries by Assembly
∙ B-FEEDBACK
Interconnect Assembly A1
Detailed Circuit Description
Power Supply Assembly A4
High Voltage Supply Section
Internal Fuse Data
Switching Section
Current-Limit Section
System Supply Section
Microcomputer
Digital Assembly A5
Fan Supply Section
External RAM
Digital Assembly Block Diagram
Strobe Lines
Eerom
Data Latch
Led Driver
Current Amplifier Assembly A2
Power Up and Reset Circuitry
Watchdog Timer
Break-Detect Circuitry
Current Amplifier Assembly Block Diagram
Error Amplifier Section
Output Stage Section
Monitor Section
Control and Switching Section
Power Supply Section
High Voltage Amplifier A3
Input Amplifier
High Voltage Amplifier Assembly Block Diagram
Window Comparator
Integrator
Input Clamp
Midstage -400V Filter
Transconductance and Cascode Stage
Midstage
High Voltage Heat Sink Assemblies
Autobias Current Source
Autobias Sense Circuit
Signal Transformer Usage
Signal Transformers
Temperature Monitoring
High Voltage Amplifier Feedback
High Voltage Sense Assembly A6
High Voltage Sense Assembly Block Diagram
Sense Amplifier Section
Destination Assembly
High-Quality Reference Name Destination
Signals Monitored by the Analog Monitor Section
Analog Monitor Section
Analog Input Switching Section
Serial Interface/Guard Crossing 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
General Cleaning
Cleaning PCA’s
Access Procedures
Assembly Location Diagram
Initial Access Procedure
CR317
TP307
TP304 TP301
CR318
Accessing the Power Supply Assembly A4
Accessing the Digital Assembly A5
When Reinstalling Digital Assembly
Accessing the Current Amplifier Assembly A2
Accessing the High Voltage Amplifier A3
Correct Way to Dress Cables
Accessing the High Voltage Sense Assembly A6
Accessing the High Voltage Output Transistors
Accessing the Interconnect Assembly A1
Enabling Front or Rear Binding Posts
Enabling Front or Rear Binding Posts
Troubleshooting
5725A
Fault Codes
Self Diagnostics
A Fault Codes
Fault Message Explanation
Self Diagnostics
Manual Tests for Fault Isolation
Analog Monitor Faults
Fault no Message
Problem 4 Fault When Entering Current Standby
Reduced-Voltage Troubleshooting Mode
Problem 3 Fault When Entering Voltage Operate
Problem 5 Fault When Entering Current Operate
Testing the Power Supply By Itself
5725A
List of Replaceable Parts
5725A
Introduction
Ref or Option No
Manual Status Information Assembly Name Fluke Part No
Final Assembly
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
A4 Power Supply PCA
Description Fluke Stock
Reference Description
Designator
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
10. A30 Inductor PCA
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
AT Pins 12 and 13 of U507 5725A-1650
10 ms
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