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Service Guide
 Flexible system features
Convenient bench-top features
Agilent E3633A and E3634A DC Power Supplies
 The Front Panel at a Glance
 For Agilent E3633A Model **For Agilent E3634A Model
 Front-Panel Voltage and Current Limit Settings
 Display Annunciators
 Use the front-panel I/OConfig key to
The Rear Panel at a Glance
 In This Book
Page
 Contents
Contents
 Chapter 4 Theory of Operation
Contents Chapter 3 Calibration Procedures Continued
 Chapter 7 Backdating Chapter 8 Schematics
Contents Chapter 5 Service
Chapter 6 Replaceable Parts
 Contents
 Specifications
 Specifications
 Table 1-1. Performance Specifications
Performance Specifications
Chapter 1 Specifications
Performance Specifications
 Chapter 1 Specifications Performance Specifications
 Temperature Coefficient, ±% of output + offset
Supplemental Characteristics
Chapter 1 Specifications Supplemental Characteristics
Remote Sensing Capability
 SCPI Standard Commands for Programmable Instruments
 20 to 70 C for storage environment
 Chapter 1 Specifications Supplemental Characteristics
 Quick Start
 Local
Quick Start
 4 Enable the outputs
To Prepare the Power Supply for Use
Chapter 2 Quick Start To Prepare the Power Supply for Use
3 Connect the power cord and turn on the power supply
 100 or 115 Vac, 6.3 AT fuse 230 Vac, 3.15 AT fuse
 2 Enable the outputs
To Check the Rated Voltages of the Power Supply
Chapter 2 Quick Start To Check the Rated Voltages of the Power Supply
1 Turn on the power supply
 Output On/Off Display Limit Voltage Current
To Check the Rated Currents of the Power Supply
 page 123 in chapter 5 of the User’s Guide
 To Use the Power Supply in Constant Voltage Mode
 1 Voltage
Current Display Limit Output On/Off
 Display Limit
To Use the Power Supply in Constant Current Mode
 Check that the Limit annunciator still flashes. Set the knob for current control. The second digit of the ammeter will be flashing. Change the flashing digit using the resolution selection keys and adjust the knob to the desired output current
 Chapter 2 Quick Start To Store and Recall the Instrument State
1 Set up the power supply for the desired operating state
To Store and Recall the Instrument State
STORE
 RECALL
DONE
Memory location “1” will be displayed in the recall mode
 OVP ON
Setting the OVP Level and Enable the OVP Circuit
To Program Overvoltage Protection
LEVEL 22.0V E3633A LEVEL 55.0V E3634A
 OVP CLEAR
Checking OVP Operation
Clearing the Overvoltage Condition
CHANGED
 Adjust OVP trip level
 OCP ON
Setting the OCP Level and Enable the OCP Circuit
To Program Overcurrent Protection
LEVEL 22.0 A E3633A LEVEL 7.5 A E3634A
 Clearing the Overcurrent Condition
Checking OCP Operation
OCP CLEAR
 Adjust OCP trip level
 To rack mount a single instrument, order adapter kit
To Rack Mount the Power Supply
To Rack Mount the Power Supply
To remove the rubber bumper, stretch a corner and then slide it off
 To Rack Mount the Power Supply
 Chapter 2 Quick Start To Rack Mount the Power Supply
 Calibration Procedures
 Calibration Procedures
 Calibration Interval
Agilent Technologies Calibration Services
 C a u t i o n
Automating Calibration Procedures
Chapter 3 Calibration Procedures Automating Calibration Procedures
Test Considerations
 Recommended Test Equipment
Chapter 3 Calibration Procedures Recommended Test Equipment
Table 3-1. Recommended Test Equipment
 Self-Test
Performance Verification Tests
Performance Verification Tests
 Measurement Techniques
Setup for Most Tests
Electronic Load
 Current-Monitoring Resistor
General Measurement Techniques
Programming
 Constant Voltage CV Verifications
Constant Voltage Test Setup
Voltage Programming and Readback Accuracy
 CV Load Effect Load Regulation
 CV Source effect Line Regulation
 CV PARD Ripple and Noise
 Load Transient Response Time
 Constant Current CC Verifications
Constant Current Test Setup
Current Programming and Readback Accuracy
 CC Load Effect Load Regulation
 CC PARD Ripple and Noise
CC Source Effect Line Regulation
 Common Mode Current Noise
Chapter 3 Calibration Procedures Common Mode Current Noise
 Performance Test Record for Agilent E3633A and E3634A
Performance Test Record for Agilent E3633A and E3634A
CV Performance Test Record
CC Performance Test Record
 See the procedure on page
Chapter 3 Calibration Procedures Calibration Security Code
Calibration Security Code
 003633 CODE E3633A 003634 CODE E3634A
To Unsecure the Power Supply for Calibration
SECURED
000000 CODE
 UNSECURED
To Unsecure the Power Supply Without the Security Code
 CALSECSTAT OFFON,code
Chapter 3 Calibration Procedures Calibration Count
Calibration Count
Calibration Message
 General Calibration/Adjustment Procedure
 V LO 0.5000
CAL SETUP
Front Panel Voltage and Current Calibration
30 LEFT
 V HI 19.500 V E3633A
V LO 0.4500
V MI 10.000 V E3633A
V MI 10.001
 For example, if the DVM reads 19.495 V, adjust the voltage to 19.495 V using the knob and arrow keys
V HI 19.495
 I MI 9.999 A
I LO 0.500 A E3633A
I LO 0.499 A
I MI 10.000 A E3633A
 I HI 19.499 A
I HI 19.500 A E3633A
If the entered number is within an acceptable range, an ‘‘ENTERED’’ message appears for one second. If the entered number is not correct, an ‘‘MIN VALUE’’ or ‘‘MAX VALUE’’ message appears for one second and the display shows the middle current calibration point again. The display now shows the high current calibration point
 CAL MODE
Aborting a Calibration in Progress
 Calibration Record for Agilent E3633A/E3634A
Calibration Record for Agilent E3633A/E3634A
 Self-Test Error Messages
Error Messages
Chapter 3 Calibration Procedures Error Messages
System Error Messages
 Calibration Error Messages
 An Example program of Excel 97 for Calibration
An Example program of Excel 97 for Calibration
 An Example program of Excel 97 for Calibration
Chapter 3 Calibration Procedures
 An Example program of Excel 97 for Calibration
Chapter 3 Calibration Procedures
 An Example program of Excel 97 for Calibration
Chapter 3 Calibration Procedures
 An Example program of Excel 97 for Calibration
Chapter 3 Calibration Procedures
 An Example program of Excel 97 for Calibration
 End of Program
 Declaration for Windows 95/NT
 Theory of Operation
 Block Diagram Overview, starting on page
 Chapter 4 Theory of Operation Block Diagram Overview
Block Diagram Overview
 Block Diagram
 Chapter 4 Theory of Operation AC Input and Bias Supplies
AC Input and Bias Supplies
 Chapter 4 Theory of Operation Floating Logic
Floating Logic
 U20 Internal Signal
 Chapter 4 Theory of Operation D-to-A Converter
D-to-A Converter
 Chapter 4 Theory of Operation A-to-D Converter
A-to-D Converter
 Chapter 4 Theory of Operation Power Mesh and Control
Power Mesh and Control
 Two error amplifiers are included in a CV/CC supply, one for controlling output voltage, the other for controlling output current. Since the constant voltage amplifier tends to achieve zero output impedance and alters the output current whenever the load resistance changes, while the constant current amplifier causes the output impedance to be infinite and changes the output voltage in response to any load resistance change, it is obvious that the two amplifiers can not operate simultaneously. For any given value of load resistance, the power supply must act either as a constant voltage source or as a constant current source - it can not be both transfer between these two modes is accomplished at a value of load resistance equal to the ratio of the output voltage control setting to the output current control setting
 Front Panel
Earth-Referenced Logic
Chapter 4 Theory of Operation Earth-Referenced Logic
 Service
 Service
 Is the Power Supply Inoperative?
Operating Checklist
Does the Power Supply Fail Self-Test?
 Standard Repair Service worldwide
Types of Service Available
Express Exchange U.S.A. only
 Repacking for Shipment
Chapter 5 Service Repacking for Shipment
Agilent Technologies recommends that you always insure shipments
 Surface Mount Repair
Electrostatic Discharge ESD Precautions
To Replace the Power-Line Fuse
Chapter 5 Service Electrostatic Discharge ESD Precautions
 Installation Procedure
To Disconnect the Output Using an External Relay
 Unit Fails Self-Test
Troubleshooting Hints
Unit Reports Errors 740 to
Unit is Inoperative
 Bias Supplies Problems
 Power-On  Self-Test
Self-Test Procedures
Complete  Self-Test
 ±10% tolerance
 Chapter 5 Service Self-Test Procedures 106
 Replaceable Parts
 To Order Replaceable Parts
Replaceable Parts
Backdating and Part Changes
 E3633/E3634-60002 Main PC Assembly
E3633/E3634-60002 Main PC Assembly
Chapter 6 Replaceable Parts
 Chapter 6 Replaceable Parts
E3633/E3634-60002 Main PC Assembly
 Chapter 6 Replaceable Parts
E3633/E3634-60002 Main PC Assembly
 Chapter 6 Replaceable Parts
E3633/E3634-60002 Main PC Assembly
 Chapter 6 Replaceable Parts
E3633/E3634-60002 Main PC Assembly
 Chapter 6 Replaceable Parts
E3633/E3634-60002 Main PC Assembly
 Chapter 6 Replaceable Parts
 Designator
 Chapter 6 Replaceable Parts
 For use with E3634A model only
 E3633-60003 Front-Panel Display PC Assembly
E3633-60003 Front-Panel Display PC Assembly
 E3633A/E3634A Power Supply Assembly
E3633-60011 Front Frame Assembly
E3633-60011 Front Frame Assembly
 Manufacturer’s List
Manufacturer’s List
 Chapter 6 Replaceable Parts Manufacturer’s List 122
 Backdating
 Backdating
 Schematics
 Mechanical Disassembly, on page
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 Copyright 1998 Agilent Technologies All Rights Reserved