Agilent Technologies E3632A User manual

Service Guide

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The Agilent E3632A is a high performance 120 watt-dual range DC power

supply with PIB and RS-232 interfaces. The combination of bench-top and

system features in this power supply provides versatile solutions for your

design and test requirements.

Convenient bench-top features

• Dual range

• Easy-to-use knob control settings

• Highly visible vacuum-fluorescent display meters

• Hghl accuracy and high resolution

• Remote voltage sensing

• Overvoltage and overcurrent protection

• Output on/off

• Excellent load and line regulation and low ripple and noise

• Operating states storage

• Portable, ruggedized case with non-skid feet

Flexible system features

• PIB (IEEE-488) and RS-232 interfaces are standard

• SCPI (Standard Commands for Programmable Instruments) compatibility

• I/O setup easily done from front-panel

• Software calibration, no internal adjustments required

Agilent E3632A

DC Power Supply

The Front Panel at a Glance

1 15V/7A range selection key

230V/4A range selection key

3Overvoltage protection key

4Overcurrent protection key

5Display limit key

6Recall operating state key

7Store operating state/Local key

8Error/Calibrate key

9I/O Configuration/Secure key

10 Output On/Off key

11 Control knob

12 Resolution selection keys

13 Voltage/current adjust selection key

1 15V/7A range selection key Selects the 15V/7A range and allows the full rated output

to 15V7A.

2 30V/4A range selection key Selects the 30V/4A range and allows the full rated output

to 30V/4A.

3 Overvoltage protection key Enables or disables the overvoltage protection function,

sets trip voltage level, and clears the overvoltage condition.

4 Overcurrent protection key Enables or disables the overcurrent protection function,

sets trip current level, and clears the overcurrent condition.

5 isplay limit key Shows voltage and current limit values on the display and allows

knob adjustment for setting limit values.

6 Recall operating state key Recalls a previously stored operating state from location

"1", "2", or "3".

7 Store operating state / Local key1 Stores an operating state in location "1", "2", or

"3" / or returns the power supply to local mode from remote interface mode.

8 Error / Calibrate key2 Displays error codes generated during operations, self-test

and calibration / or enables calibration mode (the power supply must be unsecured

before performing calibration).

9 I/O Configuration / Secure key3 Configures the power supply for remote interfaces

/ or secure or unsecure the power supply for calibration.

10 Output On/Off key Enables or disables the power supply outputs. This key toggles

between on and off.

11 Control knob Increases or decreases the value of the blinking digit by turning

clockwise or counter clockwise.

12 Resolution selection keys Move the blinking digit to the right or left.

13 Voltage/current adjust selection key Selects the knob control function for voltage

or current adjustment.

1The key can be used as the "Local" key when the power supply is in the remote

interface mode.

2You can enable the "calibration mode" by holding down this key when you turn on

the power supply.

3You can use it as the "Secure" or "Unsecure" key when the power supply is in the

calibration mode.

Front-Panel Voltage and Current Limit Settings

You can set the voltage and current limit values from the front panel using the

following method.

1Select the desired range using the range selection keys after turning on the power

supply.

2Press the key to show the limit values on the display.

3Move the blinking digit to the appropriate position using the resolution selection keys

and change the blinking digit value to the desired vltage limit by turning the control

knob. If the display limit times out, press the key again.

4Set the knob to current control mode using the voltage/current adjust selection key.

5Move the blinking digit to the appropriate position using the resolution selection keys

and change the blinking digit value to the desired current limit by turning the control

knob.

6Press the key to enable the output. After about 5 seconds, the

display will go to the output monitor mode automatically to display the voltage and

current at the output or the display will go to the monitor mode immediately by pressing

the key again.

Note All front panel keys and controls can be disabled with remote interface

commands. The Agilent E3632A must be in "Local" mode for the front panel

keys and controls to function.

Use the voltage/current adjust selection key, the resolution selection keys, and

the control knob to change the voltage and current limit value.

Display Limit

Output On/Off

Display Annunciators

Adrs Power supply is addressed to listen or talk over a remote interface.

Rmt Power supply is in remote interface mode.

15V Shows the 15V/7A range is selected.

30V Shows the 30V/4A range is selected.

OVP The overvoltage protection function is enabled when the annunciator

turns on or the overvoltage protection circuit has caused the power

supply to shutdown when the annunciator blinks.

OCP The overcurrent protection function is enabled when the annunciator

turns on or the overcurrent protection circuit has caused the power

supply to shutdown when the annunciator blinks.

CAL The power supply is in calibration mode.

Limit The display shows the limit values of voltage and current.

ERROR Hardwareorremoteinterfacecommanderrorsaredetectedandtheerror

bit has not been cleared.

OFF The output of the power supply is disabled (See

page 52 for more

information

Unreg The output of the power supply is unregulated (output is neither CV

nor CC).

CV The power supply is in constant voltage mode.

CC The power supply is in constant current mode.

To review the display annunciators, hold down key as you

turn on the power supply.

Display Limit

The Rear Panel at a Glance

Use the front-panel key to:

• Select the GPIB or RS-232 interface (see chapter 3).

• Set the GPIB bus address (see chapter 3).

• Set the RS-232 baud rate and parity (see chapter 3).

1Power-line voltage setting

2Power-line fuse-holder assembly

3AC inlet

4Power-line module

5GPIB (IEEE-488) interface connector

6RS-232 interface connector

I/O Config

In This Book

Specifications Chapter 1 lists the power supply’s specifications and

describes how to interpret these specifications.

Quick Start Chapter 2 prepares the power supply for use and helps you get

familiar with the front-panel features.

Calibration Procedures Chapter 3 provides performance verification and

calibration procedures.

Theory of Operation Chapter 4 describes block and circuit level theory

related to the operation of the power supply.

Service Chapter 5 provides guidelines for returning your power supply to

Agilent Technologies for servicing, or for servicing it yourself.

Replaceable Parts Chapter 6 contains a detailed parts list of the power

supply.

Backdatin Chapter 7 describes the difference between this manual and

older issues of this manual.

Schematics Chapter 8 contains the power supply's schematics, disassembly

drawings, and component locator drawings.

f you have questions relating to the operation of the power supply, call

1-800-452-4844 in the United States, or contact your nearest Agilent

Technologies Sales Office.

f your Agilent E3632A fails within three years of purchase, Agilent will

repair or replace it free of charge. Call 1-800-258-5165 ("Express

Exchange") in the United States, or contact your nearest Agilent

Technologies Sales Office.

Contents

Chapter 1 Specifications

Performance Specifications 15

Supplemental Characteristics 17

Chapter 2 Quick Start

To Prepare the Power Supply for Use 23

To Check the Rated Voltages of the Power Supply 25

To Check the Rated Currents of the Power Supply 26

To Use the Power Supply in Constant Voltage Mode 28

To Use the Power Supply in Constant Current Mode 30

To Store and Recall the Instrument State 32

To Program Overvoltage Protection 34

Setting the OVP Level and Enable the OVP Circuit 34

Checking OVP Operation 35

Clearing the Overvoltage Condition 35

To Program Overcurrent Protection 37

Setting the OCP Level and Enable the OCP Circuit 37

Checking OCP Operation 38

Clearing the Overcurrent Condition 38

To Rack Mount the Power Supply 39

Chapter 3 Calibration Procedures

Agilent Technologies Calibration Services 43

Calibration Interval 43

Automating Calibration Procedures 44

Recommended Test Equipment 44

Test Considerations 45

Performance Verification Tests 46

Self-Test 46

Performance Verification Tests 46

Measurement Techniques 47

Setup for Most Tests 47

Electronic Load 48

Current-Monitoring Resistor 48

Programming 48

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