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
All Rights Reserved.
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

3
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

4
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.

5
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

6
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

7
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

8
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.

9
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

10
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.