Agilent Technologies E3632A User manual

User’s Guide

Part Number: E3632-90001

October 2007.

For Safety information, Warranties, and Regulatory information,

see the pages behind the Index.

Agilent E3632A

DC Power Supply

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

supply with GPIB 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

• High 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

• GPIB (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 15V/7A.

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 Display 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 key1Stores an operating state in location ‘‘1’’, ‘‘2’’, or

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

8 Error / Calibrate key2Displays error codes generated during operation, self-test and

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

performing calibration). See Service Guide for more details on calibration.

9 I/O Configuration / Secure key3Configures the power supply for remote interfaces

/ or secure or unsecure the power supply for calibration. See Service Guide for more

details on how to secure or unsecure the power supply.

10 Output On/Off key Enables or disables the power supply output. 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.

The key can be used as the ‘‘Local’’ key when the power supply is in the remote

interface mode.

You can enable the ‘‘calibration mode’’ by holding down this key when you turn on

the power supply.

You 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 voltage 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 output monitoring mode automatically to display the voltage and

current at the output or the display will go to output monitoring 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 values.

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 Hardware or remote interfacecommand errors are detected and the error

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

General Information

Chapter 1 contains a general description of your power

supply. This chapter also provides instructions for checking your power

supply, connecting to ac power, and selecting power-line voltage.

Initial Operation

Chapter 2 ensures that the power supply develops its rated

outputs and properly responds to operation from the front panel.

Front-Panel Operation

Chapter 3 describes in detail the use of front-panel

keys and how they are used to operate the power supply from the front panel.

This chapter also shows how to configure the power supply for the remote

interface and gives a brief introduction to the calibration features.

Remote Interface Reference

Chapter 4 contains reference information to help

you program the power supply over the remote interface. This chapter also

explains how to program for status reporting.

Error Messages

Chapter 5 lists the error messages that may appear as you are

working with the power supply. Each listing contains information to help you

diagnose and solve the problem.

Application Programs

Chapter 6 contains some remote interface applications

to help you develop programs for your application.

Tutorial

Chapter 7 describes basic operation of linear power supplies and

gives specific details on the operation and use of the Agilent E3632A power

supply.

Specifications

Chapter 8 lists the power supply’s specifications.

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

1-800-829-4444

in the United States, or contact your nearest Agilent

Technologies Sales Office.

If your Agilent E3632A fails within one year 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 General Information

Safety Considerations 14

Safety and EMC Requirements 14

Options and Accessories 15

Options 15

Accessories 15

Description 16

Installation 19

Initial Inspection 19

Cooling and Location 19

Input Power Requirements 22

Power-Line Cord 22

Power-Line Voltage Selection 22

Chapter 2 Initial Operation

Preliminary Checkout 27

Power-On Checkout 28

Output Checkout 29

Voltage Output Checkout 29

Current Output Checkout 30

Chapter 3 Front-Panel Operation

Front-Panel Operation Overview 35

Constant Voltage Operation 36

Constant Current Operation 38

Storing and Recalling Operating States 40

Programming Overvoltage Protection 42

Setting the OVP Level and Enable the OVP Circuit 42

Checking OVP Operation 43

Clearing the Overvoltage Condition 43

Programming Overcurrent Protection 45

Setting the OCP Level and Enable the OCP Circuit 45

Checking OCP Operation 46

Clearing the Overcurrent Condition 46

Remote Voltage Sensing 48

CV Regulation 48

Output Rating 48

Output Noise 48

Stability 49

Remote Voltage Sensing Connections 49

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