Agilent Technologies E3631A User manual

Service Guide

Part Number: E3631-90011

Twelfth Edition, October 25, 2013

For warranty information, refer to the back of the manual.

©Copyright Agilent Technologies, Inc. 2000–2013

Agilent E3631A

Triple Output

DC Power Supply

The Agilent Technologies E3631A is a high performance 80 watt-triple output 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

• Triple output

• Easy-to-use knob control for voltage and current settings

• Highly visible vacuum-fluorescent display for voltage and current meters

• Tracking operation for ±25V outputs

• 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

Agilent E3631A

Triple Output

DC Power Supply

The Front Panel at a Glance

1 Meter and adjust selection keys

2Tracking enable/disable key

3Display limit key

4Recall operating state key

5Store operating state / Local key

6Error / Calibrate key

7I/O Configuration / Secure key

8Output On/Off key

9Control knob

10 Resolution selection keys

11 Voltage/current adjust selection key

1 Meter and adjust selection keys Select the output voltage and current of any one

supply (+6V, +25V, or -25V output) to be monitored on the display and allow knob

adjustment of that supply.

2 Tracking enable / disable key Enables / disables the track mode of ±25V supplies.

3 Display limit key Shows the voltage and current limit values on the display and allows

knob adjustment for setting limit values.

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

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

5 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.

6 Error / Calibrate key2Displays error codes generated during operations, self-test

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

before performing calibration).

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

/ or secure and unsecure the power supply for calibration.

8 Output On/Off key Enables or disables all three power supply outputs. This key

toggles between two states.

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

clockwise or counter clockwise.

10 Resolution selection keys Move the flashing digit to the right or left.

11 Voltage/current adjust selection key Selects the knob function to voltage control

or current control.

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 Settings

You can set the voltage and current from the front panel using the following

method.

1Press the key after turning on the power supply.

2Set the knob to the voltage control mode or current control mode using the voltage/

current adjust selection key.

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

4Change the blinking digit to the desired value using the control knob.

5Press 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.

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

The Agilent E3631A 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 limiting or limitings value of voltage or current.

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.

+6V Displays the output voltage and current for +6V supply. Knob is active

for 6V supply.

+25V Displays the output voltage and current for +25V supply. Knob is active

for +25V supply.

-25V Displays the output voltage and current for -25V supply. Knob is active

for -25V supply

CAL Power supply is in the calibration mode.

Track The output of +25V and -25V supplies are in track mode.

Lmt The display shows the voltage and current limit values of a selected

supply.

ERROR Hardware or remote interface command errors are detected and also the

error bit has not been cleared.

OFF The three output of the power supply is disabled.

Unreg The displayed output is unregulated (output is neither CV nor CC).

CV The displayed output is in constant-voltage mode.

CC The displayed output 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 in User's Guide).

• Set the GPIB bus address (see chapter 3 in User's Guide).

• Set the RS-232 baud rate and parity (see chapter 3 in User's Guide).

1 Power-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.

Component Locator Diagrams Chapter 6 contains the component locator

diagrams.

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.

Environmental Conditions

This instrument is designed for indoor use and in an area with low condensation. The

table below shows the general environmental requirements for this instrument.

Environmental condition Requirements

Temperature Operating condition

• 0 °C to 40 °C

Storage condition

• –20 °C to 70 °C

Humidity Up to 80% RH

Altitude Up to 2000 m

Installation category II

Pollution degree 2

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