Agilent Technologies E3634A, E3633A User Manual

Service Guide

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The Agilent E3633A and Agilent E3634A are high performance 200 watt singleoutput dual range programmable DC power supplies with both GPIB and RS232 interfaces. The combination of bench-top and system features in these power supplies provides versatile solutions for your design and test requirements.

Convenient bench-top features

• Single-output 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

• Front and Rear output terminals

• Retrieving/Scrolling error messages on the display

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 E3633A and E3634A DC Power Supplies

The Front Panel at a Glance

1 8V/20A range selection key (E3633A) 25V/7A range selection key (E3634A) 2 20V/10A range selection key (E3633A) 50V/4A range selection key (E3634A)

3 Overvoltage protection key 4 Overcurrent protection key 5 Display limit key 6 Recall operating state key

7 Store operating state/Local key 8 Error/Calibrate key 9 I/O Configuration/Secure key

10 Output On/Off key 11 Control knob 12 Resolution selection keys 13 Voltage/current adjust selection key

1 8V/20A* or 25V/7A** range selection key Selects the 8V/20A or 25V/7A

range and allows the full rated output to 8V/20A or 25V/7A.

2 20V/10A* or 50V/4A** range selection key Selects the 20V/10A or

50V/4A range and allows the full rated output to 20V/10A or 50V/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 key

Stores an operating state in location ‘‘1’’, ‘‘2’’, or ‘‘3’’ / or returns the power supply to local mode from remote interface mode.

8 E r ror / Cal ibrate k e y

Displays error codes generated during operation, selftest 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 key

Configures 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.

*For Agilent E3633A Model **For Agilent E3634A Model

Front-Panel Voltage and Current Limit Settings

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

Use the voltage/current adjust selection key, the resolution selection keys, and the control knob to change the voltage and current limit values.

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

power supply.

2 Press the 3 Move 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.

4 Set the knob to current control mode by pressing the key. 5 Move 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.

6 Press the

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

Display

key to show the limit values on the display.

Limit

Volt ag e Current

Output

key to enable the output. After about 5 seconds, the display

On/Off

Output

key again.

On/Off

Display Limit

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

The Agilent E3633A and Agilent E3634A must be in "Local" mode for the front panel keys and controls to function.

Display Annunciators

Adrs Power supply is addressed to listen or talk over a remote interface. Rmt Power supply is in remote interface mode. 8V Shows the 8V/20A range is selected. (Agilent E3633A model) 20V Shows the 20V/10A range is selected. (Agilent E3633A model) 25V Shows the 25V/7A range is selected. (Agilent E3634A model) 50V Shows the 50V/4A range is selected. (Agilent E3634A model) 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 interface command errors are detected and

the error bit has not been cleared.

OFF The output of the power supply is disabled (For more information,

see page 52 in the User’s Guide).

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

Display Limit

the power supply.

The Rear Panel at a Glance

1 Power-line voltage setting 2 Power-line fuse-holder assembly 3 AC inlet

5 GPIB (IEEE-488) interface connector 6 RS-232 interface connector

7 Rear output terminals

4 Power-line module

Use the front-panel key to:

I/O Config

• 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).

In This Book

This is the Service Guide for your Agilent E3633A and E3634A DC power supplies. Unless otherwise stated, the information in this manual applies to both two models.

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.

Backdating Chapter 7 describes the difference between this manual and older issues of this manual.

Schematics Chapter 8 co ntains th e po wer sup ply ’s sch ematic s, disasse mbly drawings, and component locator drawings.

If 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.

If your Agilent E3633A or Agilent E3634A 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.

Chapter 1 Specifications

Performance Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11 Supplemental Characteristics - - - - - - - - - - - - - - - - - - - - - - - - - - - 13

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 - - - - - - - - - - - - - - - - - - - - - - - - 40

Contents

Chapter 3 Calibration Procedures

Agilent Technologies Calibration Services - - - - - - - - - - - - - - - - - 45 Calibration Interval - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45 Automating Calibration Procedures - - - - - - - - - - - - - - - - - - - - - - 46 Test Considerations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 46 Recommended Test Equipment - - - - - - - - - - - - - - - - - - - - - - - - - - 47 Performance Verification Tests - - - - - - - - - - - - - - - - - - - - - - - - - - 48

Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 48 Performance Verification Tests - - - - - - - - - - - - - - - - - - - - - - - 48

Measurement Techniques- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49

Setup for Most Tests - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49 Electronic Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49 General Measurement Techniques - - - - - - - - - - - - - - - - - - - - - 50 Current-Monitoring Resistor- - - - - - - - - - - - - - - - - - - - - - - - - - 50 Programming - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 50

Contents

Chapter 3 Calibration Procedures (Continued)

Constant Voltage (CV) Verifications- - - - - - - - - - - - - - - - - - - - - - - 51

Constant Voltage Test Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 51 Voltage Programming and Readback Accuracy - - - - - - - - - - - 51 CV Load Effect (Load Regulation) - - - - - - - - - - - - - - - - - - - - - 52 CV Source effect (Line Regulation)- - - - - - - - - - - - - - - - - - - - - 53 CV PARD (Ripple and Noise) - - - - - - - - - - - - - - - - - - - - - - - - - 54 Load Transient Response Time - - - - - - - - - - - - - - - - - - - - - - - - 55

Constant Current (CC) Verifications - - - - - - - - - - - - - - - - - - - - - - 56

Constant Current Test Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 56 Current Programming and Readback Accuracy - - - - - - - - - - - 56 CC Load Effect (Load Regulation) - - - - - - - - - - - - - - - - - - - - - 57 CC Source Effect (Line Regulation) - - - - - - - - - - - - - - - - - - - - 58

CC PARD (Ripple and Noise) - - - - - - - - - - - - - - - - - - - - - - - - - 58 Common Mode Current Noise - - - - - - - - - - - - - - - - - - - - - - - - - - - 59 Performance Test Record for Agilent E3633A and E3634A - - - - 60

CV Performance Test Record - - - - - - - - - - - - - - - - - - - - - - - - - 60

CC Performance Test Record - - - - - - - - - - - - - - - - - - - - - - - - - 60 Calibration Security Code - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 61

To Unsecure the Power Supply for Calibration - - - - - - - - - - - 62

To Unsecure the Power Supply Without the Security Code - 63 Calibration Count - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 64 Calibration Message - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 64 General Calibration/Adjustment Procedure - - - - - - - - - - - - - - - - - 65

Front Panel Voltage and Current Calibration - - - - - - - - - - - - - 66 Aborting a Calibration in Progress - - - - - - - - - - - - - - - - - - - - - - - - 71 Calibration Record for Agilent E3633A/E3634A - - - - - - - - - - - - - 72 Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 73 An Example program of Excel 97 for Calibration - - - - - - - - - - - - 75

Chapter 4 Theory of Operation

Block Diagram Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 85 AC Input and Bias Supplies- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 87 Floating Logic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 88 D-to-A Converter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 90 A-to-D Converter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 91 Power Mesh and Control- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 92 Earth-Referenced Logic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 94 Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 94

Contents

Chapter 5 Service

Operating Checklist - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 97

Is the Power Supply Inoperative? - - - - - - - - - - - - - - - - - - - - - - 97 Does the Power Supply Fail Self-Test?- - - - - - - - - - - - - - - - - - 97

Types of Service Available - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 98

Standard Repair Service (worldwide) - - - - - - - - - - - - - - - - - - 98

Express Exchange (U.S.A. only)- - - - - - - - - - - - - - - - - - - - - - - 98 Repacking for Shipment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 99 Electrostatic Discharge (ESD) Precautions - - - - - - - - - - - - - - - 100 Surface Mount Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 100 To Replace the Power-Line Fuse - - - - - - - - - - - - - - - - - - - - - - - - 100 To Disconnect the Output Using an External Relay - - - - - - - - - 101

Installation Procedure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 101 Troubleshooting Hints - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 102

Unit is Inoperative - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 102

Unit Reports Errors 740 to 750 - - - - - - - - - - - - - - - - - - - - - - - 102

Unit Fails Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 102

Bias Supplies Problems - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 103 Self-Test Procedures- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 104

Power-On Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 104

Complete Self-Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 104

Contents

Chapter 6 Replaceable Parts

Replaceable Parts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 108

To Order Replaceable Parts - - - - - - - - - - - - - - - - - - - - - - - - - 108

Backdating and Part Changes - - - - - - - - - - - - - - - - - - - - - - - - 108 E3633/E3634-60002 Main PC Assembly - - - - - - - - - - - - - - - - - - - 109 E3633-60003 Front-Panel Display PC Assembly - - - - - - - - - - - - 119 E3633-60011 Front Frame Assembly - - - - - - - - - - - - - - - - - - - - - 120 E3633A/E3634A Power Supply Assembly - - - - - - - - - - - - - - - - - 120 Manufacturer’s List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 121

Chapter 7 Backdating

Chapter 8 Schematics

Contents

Specifications

The performance specifications are listed in the following pages. Specifications are warranted in the temperature range of 0 to 40°C with a resistive load. Supplemental characteristics, which are not warranted but are descriptions of performance determined either by design or testing. Chapter 3 ‘‘Calibration Procedures’’ contains procedures for verifying the performance specifications.

Chapter 1 Specifications

Performance Specifications

Table 1-1. Performance Specifications

Parameter Agilent E3633A Agilent E3634A Output Ratings

(@ 0 °C - 40 °C)

Programming Accuracy

12 months (@ 25 °C ± 5 °C), ±(% of output + offset)

Readback A ccuracy

12 months (over GPIB and RS-232 or front panel with respect to actual output @ 25 °C ± 5 °C), ±(% of output + offset)

Ripple and Noise (with outputs ung rounded, or with either output terminal grounded, 20 Hz to 20 MHz)

Load Regulation, ±(% of output + offset)

Line Regulation, ±(% of output + offset)

Programming Resolution Voltage 1 mV 3 mV

Readback Resolution Voltage 0.5 mV 1.5 mV

Front Panel Resolution Voltage 1 mV

[1] [2]

Low Range 0 to +8 V/0 to 20 A 0 to +25 V/0 to 7 A High Range 0 to +20 V/0 to 10 A 0 to +50V/0 to 4 A

[1]

Voltage 0.05% + 10 mV Current 0.2% + 10 mA

Voltage 0.05% + 5 mV Current 0.15% + 5 mA

Normal mode voltage

Normal mode current

Common mode current

Voltage <0.01% + 2 mV Current <0.01% + 250 uA Voltage <0.01% + 2 mV Current <0.01% + 250 uA

Current 1 mA 0.5 mA

Current 1 mA (< 10A), 10mA (

<0.35 mV rms and 3 mV p-p

<2 mA rms

<1.5 uA rms

<0.5 mV rms and 3 mV p-p

≥ 10A)

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Chapter 1 Specifications

Performance Specifications

Transient Response Time

Less than 50 msec for output to recover to within 15 mV following a change in output current from full load to half load or vice versa

Command Processing Time

Average time for output voltage to begin to change after receipt of digital data when the power supply is connected directly to the GPIB or RS-232 is less than 100 msec

OVP and OCP Accuracy, ±(% of output + offset)

OVP 0.5% + 0.5 V

OCP 0.5% + 0.5 A

Activation time : Average time for output to start to drop after OVP or OCP

condition occurs.

OVP <1.5 msec when the trip voltage is equal or greater than 3 V

<10 msec when the trip voltage is less than 3 V

OCP <10 msec

Chapter 1 Specifications

Supplemental Characteristics

Table 1-2. Supplemental Characteristics

Parameter Agilent E3633A Agilent E3634A

Output Programming Range

(maximum programmable values)

Voltage Programming Speed: Maximum time required

for output voltage to settle within 1% of its total excursion (for resistive load). Excludes command processing time.

Low Range 0 to +8.24 V/

0 to 20.6 A

High Range 0 to +20.6 V/

0 to 10.3 A

OVP 1 V to 22 V 1 V to 55 V

OCP 0 A to 22 A 0 A to 7.5 A

Full Load No Load Full Load No Load

Up 95 msec 45 msec 80 msec 100 msec

Down 30 msec 450 msec 30 msec 450 msec

0 to +25.75 V/ 0 to 7.21 A

0 to +51.5V/ 0 to 4.12 A

Remote Sensing Capability

Voltage drop Up to 0.7 V per each lead

Load regulation Add 5 mV to spec for each 1-volt change in the + output

lead due to load current changes.

Load voltage Subtract voltage drop in load leads from specified output

voltage rating.

Temperature Coefficient, ±(% of output + offset)

Maximum change in output/readback per °C after a 30-minute warm-up

Voltage 0.01% + 3 mV

Current 0.02% + 3 mA

Stability, ±(% of output + offset)

Following 1 hour warm-up, change in output over 8 hours under constant load, line, and ambient temperature

Voltage 0.02% + 1 mV

Current 0.1% + 1 mA

Chapter 1 Specifications

Supplemental Characteristics

Output Voltage Overshoot

During turn-on or turn-off of ac power, output plus overshoot will not exceed 1 V if the output control is set to less than 1 V. If the output control is set to 1 V or higher, there is no overshoot.

Programming Language

SCPI (Standard Commands for Programmable Instruments)

State Storage Memory

Three (3) user-configurable stored states

Recommended Calibration Interval

1 year

Output Terminal Isolation (maximum, from chassis ground)

±60 Vdc when connecting shorting conductors without insulation to the (+) output to the (+) sense and the (-) output and the (-) sense terminals.

±240 Vdc when connecting insulated shorting conductors to the (+) output to the (+) sense and the (-) output and the (-) sense terminals.

AC Input Ratings (selectable via rear panel selector)

std 115 Vac ± 10%, 47 to 63 Hz

opt 0E3 230 Vac ± 10%, 47 to 63 Hz

opt 0E9 100 Vac ± 10%, 47 to 63 Hz

Maximum Input Power

700 VA with full load

Cooling

Fan cooled

Operating Temperature

0 to 40 °C for full rated output. At higher temperatures, the output current is derated linearly to 50% at 55 °C maximum temperature.

Chapter 1 Specifications

Supplemental Characteristics

Storage Temperature

-20 to 70 °C for storage environment.

Environmental Conditions

Designed for indoor use in an installation category II, pollution degree 2 environment. Designed to operate at a maximum relative humidity of 95 % and at altitudes of up to 2000 meters.

Dimensions*

213 mmW x 133 mmH x 348 mmD (8.4 x 5.2 x 13.7 in)

*See below for detailed information.

Weight

Net 9.5 kg (21 lb)

Shipping 12 kg (26 lb)

Figure 8-1. Dimensions of Agilent E3633A and E3634A Power Supplies

Chapter 1 Specifications

Supplemental Characteristics

Quick Start

One of the first things you will want to do with your power supply is to become acquainted with its front panel. Written procedures in this chapter prepare the power supply for use and familiarize you with most front-panel operations.

• The power supply is shipped from the factory configured in the front-panel operation mode. At power-on, the power supply is automatically set to operate in the front-panel operation mode. When in this mode, the frontpanel keys can be used. When the power supply is in remote operation mode, you can return to front-panel operation mode at any time by pressing the

Store

(Local) key if you did not previously send the front-panel lockout

Local

command. A change between front-panel and remote operation modes will not result in a change in the output parameters.

• The power supply has two output ranges. This feature allows more voltage at a lower current or more current at a lower voltage. The desired output range is selected from the front panel or over the remote interfaces. The

20V for the E3633A and 25V or 50V for the E3634A annunciator indicates

or the presently selected range.

• When you press key (the

Display Limit

Limit annunciator flashes), the display of

the power supply goes to the limit mode and the present limit values will be displayed. In this mode, you can also observe the change of the limit values when adjusting the knob. If you press the key again or let the

Display Limit

display time-out after several seconds, the power supply will return the display to the meter mode (the

Limit annunciator turns off). In this mode,

the actual output voltage and current will be displayed.

• The output of the power supply can be enabled or disabled from the front panel by pressing key. When the output is off, the

Output On/Off

OFF annunciator

turns on and the output is disabled.

• The display provides the present operating status of the power supply with annunciators and also informs the user of error codes. For example, the power supply is operating in CV mode in the 8V/20A* or 25V/7A** range and controlled from the front panel, then the

CV and 8V* or 25V** annunciators

will turn on. If, however, the power supply is remotely controlled, the annunciator will also turn on, and when the power supply is being addressed over GPIB interface, the

Adrs annunciator will turn on. See “Display

Annunciators’’ on page 5 for more information.

Rmt

*For Agilent E3633A Model **For Agilent E3634A Model

Chapter 2 Quick Start

To Prepare the Power Supply for Use

The following steps help you verify that the power supply is ready for use.

Power

Output On/Off

1 Check the list of supplied items.

Verify that you have received the following items with your power supply. If anything is missing, contact your nearest Agilent Technologies Sales Office.

One power cord for your location.

One User’s Guide.

This Service Guide.

Certificate of Calibration.

2 Verify that the correct power-line voltage setting is selected and that

the correct power-line fuse is installed.

The line voltage is set to 100, 115 or 230 Vac from the factory according to the input power option selected when you ordered the power supply. Change the voltage setting if it is not correct for your location (see the next page for detailed information). For 100 or 115 Vac operation, the correct fuse is 6.3 AT (Agilent part number 2110-1030) and for 230 Vac operation, the correct fuse is

3.15 AT (Agilent part number 2110-1031).

3 Connect the power cord and turn on the power supply.

A power-on self-test occurs automatically when you turn on the power supply. The front-panel display will light up while the power supply performs its power-on self- test. After performing the self-test, the power supply will go into the power-on / reset state; the output is disabled (the on); the 8V/20A* or 25V/7A** range is selected (the

OFF annunciator turns

8V* or 25V** annunciator

turns on); the knob is selected for voltage control.

Notice that the

OVP and OCP annunciators also turn on.

4 Enable the outputs.

Output

Press key to enable the outputs. The

On/Off

8V* or 25**, OVP, OCP, and CV annunciators are lit. The flashing digit can be

OFF annunciator turns off and the

adjusted by turning the knob. Notice that the display is in the meter mode. ‘‘Meter mode’’ means that the display shows the actual output voltage and current.

*For Agilent E3633A Model **For Agilent E3634A Model

Chapter 2 Quick Start

To Prepare the Power Supply for Use

Remove the power cord. Remove the fuse-holder assembly with a flat-blade screwdriver from the rear panel.

Install the correct line fuse. Remove the power-line voltage selector from the power-line module.

100 or 115 Vac, 6.3 AT fuse 230 Vac, 3.15 AT fuse

Rotate the power-line voltage selector

until the correct voltage appears.

Replace the power-line voltage selector and the fuse-holder assembly in the rear panel.

100, 115, or 230 Vac

Install the correct fuse and verify that the correct line voltage appears in the window.

Power

Output On/Off

Chapter 2 Quick Start

To Check the Rated Voltages of the Power Supply

The following procedures check to ensure that the power supply produces its rated voltage output with no load and properly responds to operation from the front panel.

For each step, use the keys shown on the left margins.

1 Turn on the power supply.

The power supply will go into the power-on / reset state; the output is disabled

OFF annunciator turns on); the 8V/20A* or 25V/7A** range is selected (the

(the

8V* or 25V** annunciator turns on); and the knob is selected for voltage control.

2 Enable the outputs.

OFF annunciator turns off and the 8V* or 25V**, OVP, OCP, and CV

The annunciators are lit. The flashing digit can be adjusted by turning the knob. Notice that the display is in the meter mode. “Meter mode’’ means that the display shows the actual output voltage and current.

3 Check that the front-panel voltmeter properly responds to knob

control.

Turn the knob clockwise or counter clockwise to check that the voltmeter responds to knob control and the ammeter indicates nearly zero.

4 Ensure that the voltage can be adjusted from zero to the maximum

rated value.

Adjust the knob until the voltmeter indicates 0 volts and then adjust the knob until the voltmeter indicates ‘‘8.0 volts’’* or ‘‘25.0 volts’’**.

You can use the resolution selection keys to move the flashing digit to the

right or left when setting the voltage.

*For Agilent E3633A Model **For Agilent E3634A Model

Power

Output On/Off

Display Limit

Volt ag e Current

Chapter 2 Quick Start

To Check the Rated Currents of the Power Supply

The following procedures check to ensure that the power supply produces its rated current outputs with a short and properly responds to operation from the front panel.

For each step, use the keys shown on the left margins.

1 Turn on the power supply.

The power supply will go into the power-on / reset state; the output is disabled

OFF annunciator turns on); the 8V/20A* or 25V/7A** range is selected (the

(the

8V* or 25V** annunciator turns on); and the knob is selected for voltage

control.

2 Connect a short across (+) and (-) output terminals with an insulated

test lead.

3 Enable the outputs.

OFF annunciator turns off and the 8V* or 25V**, OVP, and OCP

The annunciators turn on. The resistance of the test lead. The flashing digit can be adjusted by turning the knob. Notice that the display is in the meter mode. “Meter mode’’ means that the display shows the actual output voltage and current.

4 Adjust the voltage limit value to 1.0 volt.

Set the display to the limit mode (the the voltage limit to 1.0 volt to assure CC operation. The light.

5 Check that the front-panel ammeter properly responds to knob control.

Set the knob to the current control, and turn the knob clockwise or counter clockwise when the display is in the meter mode (the Check that the ammeter responds to knob control and the voltmeter indicates nearly zero (actually, the voltmeter will show the voltage drop caused by the test lead).

CV or CC annunciator is lit depending on the

Lmt annunciator will be flashing). Adjust

CC annunciator will

Lmt annunciator is off).

*For Agilent E3633A Model **For Agilent E3634A Model

Chapter 2 Quick Start

To Check the Rated Currents of the Power Supply

6 Ensure that the current can be adjusted from zero to the maximum

rated value.

Adjust the knob until the ammeter indicates 0 amps and then until the ammeter indicates ‘‘20.0 amps’’* or ‘‘7.0 amps’’**.

Note If an error has been detected during the output checkout procedures, the ERROR

annunciator will turn on. See “Error Messages’’ for more information, starting on page 123 in chapter 5 of the User’s Guide.

You can use the resolution selection keys to move the flashing digit to the

right or left when setting the voltage.

*For Agilent E3633A Model **For Agilent E3634A Model

Power

Display Limit

Chapter 2 Quick Start

To Use the Power Supply in Constant Voltage Mode

To set up the power supply for constant voltage (CV) operation, proceed as follows.

For each step, use the keys shown on the left margin.

1 Connect a load to the desired output terminals.

With power-off, connect a load to the desired output terminals.

2 Turn on the power supply.

The power supply will go into the power-on / reset state; the output is disabled

OFF annunciator turns on); the 8V/20A* or 25V/7A** range is selected (the

(the

8V* or 25V** annunciator turns on); and the knob is selected for voltage control.

20V,10A 50V,4A

Press * or ** key to operate the power supply in the 20V/10A* or 50V/4A** range before proceeding to the next step. The annunciator turns on.

3 Set the display to the limit mode.

Notice that the

Limit annunciator flashes, indicating that the display is in the

limit mode. When the disp lay is in the limit mode, you can see the voltage and current limit values of the power supply.

20V* or 50V**

Volt ag e Current

In constant voltage mode, the voltage values between the meter and limit modes are the same, but the current values are not. Moreover, if the display is in the meter mode, you cannot see the change of current limit value when adjusting the knob. We recommend that you should set the display to “limit” mode to see the change of current limit value in the constant voltage mode whenever adjusting the knob.

4 Adjust the knob for the desired current limit.

Check that the

Limit annunciator still flashes. Set the knob for current control.

The second digit of the ammeter will be flashing. The flashing digit can be changed using the resolution selection keys and the flashing digit can be adjusted by turning the knob. Adjust the knob to the desired current limit.

You can use the resolution selection keys to move the flashing digit to the

right or left when setting current.

*For Agilent E3633A Model **For Agilent E3634A Model

Chapter 2 Quick Start

To Use the Power Supply in Constant Voltage Mode

Volt ag e Current

5 Adjust the knob for the desired output voltage.

Check that the

Limit annunciator still flashes. Set the knob for voltage control.

The second digit of the voltmeter will be flashing. Change the flashing digit using the resolution selection keys and adjust the knob to the desired output voltage.

Display Limit

6 Return to the meter mode.

Display

Press key or let the display time-out after several seconds to return to

Limit

the meter mode. Notice that the

Limit annunciator turns off and the display

shows “OUTPUT OFF” message.

Output On/Off

7 Enable the output.

OFF annunciator turns off and the 8V* (or 25V**) or 20V* (or 50V**), OVP,

The

OCP and CV annunciators are lit. Notice that the display is in the meter mode.

In the meter mode, the display shows the actual output voltage and current.

8 Verify that the power supply is in the constant voltage mode.

If you operate the power supply in the constant voltage (CV) mode, verify that

CV annunciator is lit. If the CC annunciator is lit, choose a higher current

the limit.

Note During actual CV operation, if a load change causes the current limit to be exceeded,

the power supply will automatically crossover to the constant current mode at the preset current limit and the output voltage will drop proportionately.

You can use the resolution selection keys to move the flashing digit to the

right or left when setting the current.

*For Agilent E3633A Model **For Agilent E3634A Model

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