EXFO EPM-ELS-50 User Manual [en, ru, es, fr]

Руководство пользователя

EPM-50/ELS-50

Power Meter/Light Source

User Guide

Guide d’utilisation

用户指南

Guía del usuario

Guia do utilizador

Copyright © 2010 EXFO Electro-Optical Engineering Inc. All rights reserved. No part
of this publication may be reproduced, stored in a retrieval system or transmitted in
any form, be it electronically, mechanically, or by any other means such as
photocopying, recording or otherwise, without the prior written permission of EXFO
Electro-Optical Engineering Inc. (EXFO).

Information provided by EXFO is believed to be accurate and reliable. However, no
responsibility is assumed by EXFO for its use nor for any infringements of patents or
other rights of third parties that may result from its use. No license is granted by
implication or otherwise under any patent rights of EXFO.

EXFO’s Commerce And Government Entities (CAGE) code under the North Atlantic
Treaty Organization (NATO) is 0L8C3.

The information contained in this publication is subject to change without notice.

Trademarks

EXFO’s trademarks have been identified as such. However, the presence or
absence of such identification does not affect the legal status of any trademark.

Units of Measurement

Units of measurement in this publication conform to SI standards and practices.
Version number: 2.0.0

ii

Contents

Certification Information ................................................................................. iv

1 Introducing the EPM-50/ELS-50 ................................................ 1

Main Features ................................................................................................... 1

Power Sources .................................................................................................. 3

Typical Applications .......................................................................................... 3

Conventions ......................................................................................................3

2 Safety Information ................................................................... 4

3 Getting Started ......................................................................... 5

Turning the Unit On and Off ............................................................................. 5

Activating Automatic Shutdown (Auto-Off) ...................................................... 6

Interchanging connector adaptaters .................................................................6

Cleaning and Connecting Optical Fibers ........................................................... 7

4 Measuring Power or Loss (EPM-50) .......................................... 8

Nulling Electrical Offsets ................................................................................... 8

Referencing Your Power Meter to a Source ....................................................... 9

Measuring Power or Loss ................................................................................ 10

5 Using a Light Source (ELS-50) ................................................. 12

Activating/Deactivating a Light Source ........................................................... 12

Modulating the Source Signal ........................................................................ 12

6 Maintenance ............................................................................ 13

Cleaning EUI Connectors ................................................................................ 14

Cleaning Fixed Connectors .............................................................................. 16

Cleaning Detector Ports .................................................................................. 17

Replacing Batteries ......................................................................................... 18

Recalibrating the Unit .....................................................................................18

Recycling and Disposal (Applies to European Union Only) .............................. 19

7 Troubleshooting ...................................................................... 20

Solving Common Problems ............................................................................. 20

Error Codes and Descriptions .......................................................................... 20

Contacting the Technical Support Group ........................................................ 21

Transportation ................................................................................................ 22

8 Warranty .................................................................................. 23

General Information ....................................................................................... 23

Liability ........................................................................................................... 23

Exclusions .......................................................................................................24

Certification .................................................................................................... 24

Service and Repairs ......................................................................................... 25

EXFO Service Centers Worldwide .................................................................... 26

A Technical Specifications .......................................................... 27

EPM-50/ELS-50 iii

Certification Information iv

Certification Information

F.C.C. Information

Electronic test equipment is exempt from Part 15 compliance (FCC) in the United
States. However, compliance verification tests are systematically performed on
most EXFO equipment.

 Information

Electronic test equipment is subject to the EMC Directive in the European Union.
The EN61326 standard prescribes both emission and immunity requirements for
laboratory, measurement, and control equipment. This unit has undergone
extensive testing according to the European Union Directive and Standards.

DECLARATION OF CONFORMITY

Application of Council Directive(s): 2004/108/EC - The EMC Directive

Manufacturer’s Name: EXFO Electro-Optical Engineering Inc.
Manufacturer’s Address: 400 Godin Avenue
Quebec, Quebec

[phone]
Equipment Type/Environment: Test & Measurement / Industrial
Trade Name/Model No.: EPM-50 / Power Meter

Standard(s) to which Conformity is Declared:

EN 61326-1:2006 Electrical Equipment for Measurement, Control and Laboratory

EN 60825-1:2007 Edition 2.0 Safety of laser products – Part 1: Equipment classification and

EN 55022: 2006 + A1: 2007 Information technology equipment — Radio disturbance

I, the undersigned, hereby declare that the equipment specified above conforms to the above Directive and Standards.

Manufacturer

Signature:

Full Name: Stephen Bull, E. Eng

Position: Vice-President Research and

Address: 400 Godin Avenue, Quebec (Quebec),

Date: December 03, 2009

Development

Canada, G1M 2K2

Use - EMC Requirements

requirements

characteristics — Limits and methods of measurement

2006/66/EC - The Battery Directive
93/68/EEC - CE Marking
And their amendments

Canada, G1M 2K2

ELS-50 / Light Source

1 Introducing the

EPM-50/ELS-50

This user guide covers the following products (unless otherwise specified,
descriptions apply to all):

³ EPM-50 Power Meter
³ ELS-50 Light Source

Main Features

The EPM-50 Power Meter offers:

³ a rugged design
³ Interchangeable connector adapters
³ 300 hours of battery life
³ tone recognition for fiber identification
³ a universal push-pull interface
³ reference function for direct loss measurements

The ELS-50 Light Source offers:

³ a rugged design
³ excellent power stability for reliable loss measurements
³ interchangeable connectors interface
³ up to 60 hours of battery life
³ interchangeable connector adapters
³ tone generation for fiber identification

EPM-50/ELS-50 1

Introducing the EPM-50/ELS-50 2

Front View

Protector Cap

LCD display

Keypad
(EPM-50 shown)

Back View

Safety label and

serial number

Battery compartment

(3 alkaline or
rechargeable

batteries)

Connector port

Quick reference
label

Power Sources

The units operate with 3 AA alkaline or rechargeable batteries.

IMPORTANT

If the battery level becomes too low, the unit turns itself off.

Typical Applications

The units offer specific typical applications.
EPM-50 Power Meter:

³ High power model for CATV and Telco applications
³ Enterprise/LAN for singlemode and multimode measurements

ELS-50 Light Source:

³ Telco/CATV and FTTH models; dual and triple wavelenghts
³ Enterprise/LAN models; singlemode and multimode

Conventions

Before using the product described in this manual, you should understand the
following conventions:

WARNING

Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Do not proceed unless you
understand and meet the required conditions.

CAUTION

Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. Do not proceed unless you
understand and meet the required conditions.

CAUTION

Indicates a potentially hazardous situation which, if not avoided,
may result in component damage. Do not proceed unless you
understand and meet the required conditions.

IMPORTANT

Refers to information about this product you should not overlook.

EPM-50/ELS-50 3

Safety Information 4

2 Safety Information

WARNING

Do not install or terminate fibers while a laser source is active. Never
look directly into a live fiber and ensure that your eyes are protected
at all times.

WARNING

Use of controls, adjustments and procedures for operation and
maintenance other than those specified herein may result in
hazardous radiation exposure.

Your instrument is a Class 1 laser product in compliance with standards IEC 60825-1
and 21 CFR 1040.10. Laser radiation may be encountered at the output port.

The following label indicates that a product contains a Class 1 source:

CLASS 1

LASER PRODUCT

Note: The label is affixed to your product.

3 Getting Started

Turning the Unit On and Off

When you turn off the EPM-50, it saves the current wavelength, unit and reference
power.

IMPORTANT

If you remove the batteries, the unit will turn off without saving the
above values.

If batteries are low, the unit will save the above values and turn off.

Note: Offset nulling values are always returned to factory settings.

To turn on the unit:

Press . You may use the unit immediately under normal conditions.

To turn off the unit:

From normal operating mode, hold down a few seconds.

Display

Power meter wavelength

modulation

Detected

modulation

(EPM-50)

Batteries level

(EPM-50)

Source

(ELS-50)

Auto-off activated

Reference power (EPM-50)

Measured power/loss (EPM-50)
Active source wavelength (ELS-50)

Keypad

PRESS: Switches between
units

EPM-50

HOLD: Turns unit on/off

PRESS: Controls

auto-off

PRESS: Exits special

modes

PRESS: Changes
wavelengths

PRESS: Activates next source
HOLD: Deactivates current source

HOLD: Sets input power as
reference power

ELS-50

PRESS: Switches between
modulation values

EPM-50/ELS-50 5

Getting Started 6

Activating Automatic Shutdown (Auto-Off)

When auto-off is activated, the unit will turn off after
10 minutes of idle time.

Auto-off is activated by default when you turn on the
unit.

To deactivate/reactivate auto-off:

When unit is on, press .

Note: Auto-off is automatically disabled when you perform an offset nulling.

Changing Connector Adapters

The connector adapters are optional accessories available on the EPM-50 Power
Meter and ELS-50 Light Source. Depending on the type of connector on the fiber you
need to test, you might have to change them.

To change connector adapters:

1. Hold the unit so the connector port is facing you.

2. Turn the connector adapter counterclockwise to unscrew it.

3. Screw in the adapter you want to use.

Cleaning and Connecting Optical Fibers

IMPORTANT

To ensure maximum power and to avoid erroneous readings:

³ Always clean fiber ends as explained below before inserting

them into the port. EXFO is not responsible for damage or errors
caused by bad fiber cleaning or handling.

³ Ensure that your patchcord has appropriate connectors. Joining

mismatched connectors will damage the ferrules.

To connect the fiber-optic cable to the port:

1. Inspect the fiber using a fiber inspection microscope. If the fiber is clean,

proceed to connecting it to the port. If the fiber is dirty, clean it as explained
below.

2. Clean the fiber ends as follows:
2a. Gently wipe the fiber end with a lint-free swab dipped in isopropyl alcohol.
2b. Use compressed air to dry completely.
2c. Visually inspect the fiber end to ensure its cleanliness.

3. Carefully align the connector and port to prevent the fiber end from touching the

outside of the port or rubbing against other surfaces.
If your connector features a key, ensure that it is fully fitted into the port’s

corresponding notch.

4. Push the connector in so that the fiber-optic cable is firmly in place, thus
ensuring adequate contact.

If your connector features a screwsleeve, tighten the connector enough to firmly
maintain the fiber in place. Do not overtighten, as this will damage the fiber and
the port.

Note: If your fiber-optic cable is not properly aligned and/or connected, you

will notice heavy loss and reflection.

EPM-50/ELS-50 7

Measuring Power or Loss (EPM-50) 8

4 Measuring Power or Loss

(EPM-50)

Nulling Electrical Offsets

Temperature and humidity variations affect the performance of electronic circuits
and optical detectors. Nulling the electrical offsets eliminates these effects. Your un i t
has been designed not to require offset nulling under normal operation, but you
should perform it whenever environmental conditions change significantly or when
measuring very low power values.

IMPORTANT

If light reaches the detector when nulling offsets, LIGH appears on
the display and the nulling is not performed. You will need to press a
key to return to the previous display.

Note: Factory-defined values will be reinstated when you turn off the unit.

To perform an offset nulling:

Hold down and a few seconds. The unit
displays NULL while nulling the offsets, then returns to
normal mode.

Note: Keypad is disabled during the operation.

Referencing Your Power Meter to a Source

In reference mode, your unit displays the loss created by the fiber under test only,
since a reference value is subtracted from the measured power.

Note: You must set a reference value separately for each wavelength.

To reference the power meter to a source manually:

1. Using the proper adapter, connect a light source (such as ELS-50) to the

detector port of your power meter.

Reference

test jumper

Power

meter

Light
source

test jumper

Bulkhead

connector

2. Activate the source at the desired wavelength.

3. Match the source and power meter wavelenghts using .

Wavelength is displayed in the top left corner.

4. Hold down for a few seconds. The power meter
stores the currently detected power as the new
reference power.

Reference power is displayed in the top right corner
(in dBm) and current loss reading is automatically
switched to dB.

5. Repeat the procedure for each wavelength you want to reference.

AdapterReference

Note: Once all desired wavelengths have been referenced, do not disconnect

the Reference Test Jumper from the source port until all measurements
have been done.

EPM-50/ELS-50 9

Measuring Power or Loss (EPM-50) 10

Measuring Power or Loss

Measuring absolute power is done the same way as referencing the power meter to
a source, except for the referencing step.

To perform power or loss measurements:

1. If necessary, perform an offset nulling (see Nulling Electrical Offsets on page 8).

2. Check and clean your fibers appropriately for optimum performance

(see Cleaning and Connecting Optical Fibers on page 7).

3. For loss measurements, reference your power meter to a light source
(see Referencing Your Power Meter to a Source on page 9), then deactivate the
light source.

4. Using the proper adapter and test jumpers, connect a fiber under test to a light
source (such as ELS-50) and to the detector port of your unit.

Note: If you have referenced your power meter to a source, simply connect a

fiber under test to the test jumpers used for referencing.

Te st

jumper

Light
source

Bulkhead

connector

Fiber under test

jumper

Bulkhead

connector

Power

meter

Te st

Adapter

5. Activate the source at the desired wavelength.

6. Match the source and power meter wavelengths using .

Modulation detected

Actual power

or loss

of fiber under test

When power or loss is outside power limits

(see Technical Specifications on page 27)

When the unit detects a modulated signal, it displays the modulation value and
average measured power or loss (see left illustration above). You may notice a
slightly unstable last digit.

7. If necessary, change the displayed units by pressing .

8. Repeat the procedure for other wavelengths.

EPM-50/ELS-50 11

Using a Light Source (ELS-50) 12

5 Using a Light Source

(ELS-50)

The ELS-50 may contain up to three sources.

Activating/Deactivating a Light Source

Only one source may be active at a time. When no source is active, the unit displays
OFF and leaves the top left corner empty.

To activate a light source and change the wavelength:

Press
and modulation.

To deactivate the light source:

³ Press

³ Hold down

Modulating the Source Signal

When you activate the first source, the signal is always CW (unmodulated). When
you switch sources, the modulation remains the same. Modulation is indicated in
the top left corner.

Available modulation values are: CW, 270 Hz, 1 kHz and 2 kHz.

To change the signal modulation:

1. Activate the source.

2. Press to switch between available modulations.

to activate each available source in turn. The unit displays the wavelength

until you get past the last source.

OR

a few seconds.

Note: When the output signal is modulated

(270Hz, 1kHz, 2kHz), you will notice the
mention out blinking in the top left corner of the display.

6 Maintenance

This product contains no user-serviceable parts. However, it contains sensitive
electronic and optical components, and should be handled carefully and stored in
its carrying case when not in use.

To help ensure long, trouble-free operation:

³ Always inspect fiber-optic connectors before using them and clean them if

necessary.

³ Keep the unit free of dust.
³ Clean the unit casing and front panel with a cloth slightly dampened with water.
³ Store unit at room temperature in a clean and dry area. Keep the unit out of

direct sunlight.

³ Avoid high humidity or significant temperature fluctuations.
³ Avoid unnecessary shocks and vibrations.
³ If any liquids are spilled on or into the unit, turn off the power immediately,

disconnect from any external power source, remove the batteries and let the
unit dry completely.

WARNING

Use of controls, adjustments, and procedures for operation and
maintenance other than those specified herein may result in
hazardous radiation exposure.

EPM-50/ELS-50 13

Maintenance 14

Cleaning EUI Connectors

Regular cleaning of EUI connectors will help maintain optimum performance. There
is no need to disassemble the unit.

IMPORTANT

If any damage occurs to internal connectors, the module casing will
have to be opened and a new calibration will be required.

To clean EUI connectors:

1. Remove the EUI from the instrument to expose the connector baseplate and

ferrule.

Tur n

Push

2. Moisten a 2.5 mm cleaning tip with one drop of isopropyl alcohol (alcohol may
leave traces if used abundantly).

3. Slowly insert the cleaning tip into the EUI adapter until it comes out on the other
side (a slow clockwise rotating movement may help).

Pull

3

4

5

4. Gently turn the cleaning tip one full turn, then continue to turn as you withdraw
it.

5. Repeat steps 3 to 4 with a dry cleaning tip.

Note: Make sure you don’t touch the soft end of the cleaning tip.

6. Clean the ferrule in the connector port as follows:
6a. Deposit one drop of isopropyl alcohol on a lint-free wiping cloth.

IMPORTANT

Since isopropyl alcohol is not absolutely pure, it may leave residues
if used abundantly or left to evaporate (about 10 seconds).

Avoid contact between the tip of the bottle and the wiping cloth,
dry the surface quickly, and use a bottle that distributes only a drop
of alcohol at a time.

6b. Gently wipe the connector and ferrule.
6c. With a dry lint-free wiping cloth, gently wipe the same surfaces to ensure

that the connector and ferrule are perfectly dry.

6d. Verify connector surface with a portable fiber-optic microscope (for

example, EXFO’s FOMS) or fiber inspection probe (for example, EXFO’s
FIP).

WARNING

Verifying the surface of the connector WHILE THE UNIT IS ACTIVE
WILL result in permanent eye damage.

7. Put the EUI back onto the instrument (push and turn clockwise).

8. Throw out cleaning tips and wiping cloths after one use.

EPM-50/ELS-50 15

Maintenance 16

Cleaning Fixed Connectors

Regular cleaning of connectors will help maintain optimum performance. Do not try
to disassemble the unit. Doing so would break the connector.

To clean fixed connectors:

1. Fold a lint-free wiping cloth in four to form a square.

2. Moisten the center of the lint-free wiping cloth with only one drop of isopropyl

alcohol.

IMPORTANT

Alcohol may leave traces if used abundantly. Avoid contact between
the tip of the bottle and the wiping cloth, and do not use bottles
that distribute too much alcohol at a time.

3. Gently wipe the connector threads three times with the folded and moistened
section of the wiping cloth.

IMPORTANT

Isopropyl alcohol takes approximately ten seconds to evaporate.
Since isopropyl alcohol is not absolutely pure, evaporation will leave
microscopic residue. Make sure you dry the surfaces before
evaporation occurs.

4. With a dry lint-free wiping cloth, gently wipe the same surfaces three times with
a rotating movement.

5. Throw out the wiping cloths after one use.

6. Moisten a cleaning tip (2.5 mm tip) with only one drop of isopropyl alcohol.

IMPORTANT

Alcohol may leave traces if used abundantly. Avoid contact between
the tip of the bottle and the cleaning tip, and do not use bottles that
distribute too much alcohol at a time.

7. Slowly insert the cleaning tip into the connector until it reaches the ferrule
inside (a slow clockwise rotating movement may help).

7

8

9

8. Gently turn the cleaning tip one full turn.

9. Continue to turn as you withdraw the cleaning tip.

10. Repeat steps 7 to 9, but this time with a dry cleaning tip (2.5 mm tip provided by

EXFO).

Note: Make sure you don’t touch the soft end of the cleaning tip and verify the

cleanliness of the cotton tip.

11. Throw out the cleaning tips after one use.

Cleaning Detector Ports

Regular cleaning of detectors will help maintain measurement accuracy.

IMPORTANT

Always cover detectors with protective caps when unit is not in use.

To clean detector ports:

1. Remove the protective cap and adapter (FOA) from the detector.

2. If the detector is dusty, blow dry with compressed air.

3. Being careful not to touch the soft end of the swab, moisten a cleaning tip with

only one drop of isopropyl alcohol.

IMPORTANT

Alcohol may leave traces if used abundantly. Do not use bottles that
distribute too much alcohol at a time.

4. While applying light pressure (to avoid breaking the detector window), gently
rotate the cleaning tip on the detector window.

5. Repeat step 4 with a dry cleaning tip or blow dry with compressed air.

6. Discard the cleaning tips after one use.

EPM-50/ELS-50 17

Maintenance 18

Replacing Batteries

Your unit requires three AA alkaline or rechargeable
batteries.

To replace batteries:

1. Turn off the unit.

2. Open the battery compartment door located at the

back of the unit.

3. Replace batteries, respecting the polarity as shown.

4. Close the battery compartment door.

WARNING

Do not throw batteries into fire or water and do not short-circuit
the batteries’ electrical contacts. Do not disassemble.

Recalibrating the Unit

Manufacturing and service center calibrations are based on the ISO/IEC 17025
Standard, which states that calibration documents must not contain a
recommended calibration interval, unless this has been previously agreed upon
with the customer.

Validity of specifications depends on operating conditions. For example, the
calibration validity period can be longer or shorter depending on the intensity of use,
environmental conditions and unit maintenance. You should determine the
adequate calibration interval for your unit according to your accuracy requirements.

Under normal use, EXFO recommends calibrating your unit every year.

Note: The FlexCare warranty program includes Calibration/Verification

Note: Recalibration only applies to the EPM-50 Power Meter.

packages (see Service and Repairs on page 25).

Recycling and Disposal (Applies to European
Union Only)

Recycle or dispose of your product (including electric and electronic
accessories) properly, in accordance with local regulations. Do not
dispose of it in ordinary garbage receptacles.

This equipment was sold after August 13, 2005 (as identified by the
black rectangle).

³ Unless otherwise noted in a separate agreement between EXFO and a

customer, distributor or commercial partner, EXFO will cover costs related to
the collection, treatment, recovery and disposal of end-of-lifecycle waste
generated by electronic equipment introduced after August 13, 2005 to an
European Union member state with legislation regarding Directive 2002/96/EC.

³ Except for reasons of safety or environmental benefit, equipment manufactured

by EXFO, under its brand name, is generally designed to facilitate dismantling
and reclamation.

For complete recycling/disposal procedures and contact information, visit the EXFO
Web site at www.exfo.com/recycle.

EPM-50/ELS-50 19

Troubleshooting 20

7 Troubleshooting

Solving Common Problems

Problem Possible Cause Solution

The unit does not turn on. Batteries are discharged. Replace batteries.

Reference power different than
source output power.

Error Codes and Descriptions

ER: error code displayed until you press a key.

Received power outside
detector’s range.

Change source output
power.

Error
Code

LIGH

Light detected while nulling offsets.

(EPM-50

Nulling is not performed.

only)

3/11 Embedded software problem. Contact EXFO.

7 Hardware problem. Replace unit.

13 Non-volatile memory corrupted

(would occur during unit
initialization).

Description Solution

Correctly place protective cap on
detector port, then retry.

³ Hold down all 3 buttons during

initialization to reset unit.

³ Unit must be recalibrated.

Contact EXFO.

Contacting the Technical Support Group

To obtain after-sales service or technical support for this product, contact EXFO at
one of the following numbers. The Technical Support Group is available to take your
calls from Monday to Friday, 8:00 a.m. to 7:00 p.m. (Eastern Time in North America).

For detailed information about technical support, visit the EXFO Web site at

www.exfo.com.

Technical Support Group

400 Godin Avenue
Quebec (Quebec) G1M 2K2
CANADA

To accelerate the process, please have information such as the name and the serial
number (see the product identification label—an example is shown below), as well
as a description of your problem, close at hand.

1 866 683-0155 (USA and Canada)
Tel.: [phone]
Fax: [phone]

[e-mail]

P/N

**************** A

542392-3D

S/N

Made in Canada QST442B

January 2020

EPM-50XX

Detector

type

Ver.

Mfg.
date

465 Godin Avenue
Vanier (Quebec) G1M 3G7 CANADA

ELS-50-XX-XX-XX

Source

ports

Source
connector

You may also be requested to provide the embedded software version numbers.

To display the embedded software version, the
manufacturing date, and the serial number:

1. Hold down

The unit displays the main embedded software

and press at the same time.

version.

2. Press again to view the serial number and
manufacturing date.

3. Press to return to normal mode.

EPM-50/ELS-50 21

Troubleshooting 22

Transportation

Maintain a temperature range within specifications when transporting the unit.
Transportation damage can occur from improper handling. The following steps are
recommended to minimize the possibility of damage:

³ Pack the unit in its original packing material when shipping.
³ Avoid high humidity or large temperature fluctuations.
³ Keep the unit out of direct sunlight.
³ Avoid unnecessary shocks and vibrations.

8 Warranty

General Information

EXFO Electro-Optical Engineering Inc. (EXFO) warrants this equipment against
defects in material and workmanship for a period of one year from t

shipment. EXFO also warrants that this equipment will meet applicable

original
specifications under normal use.

During the warranty period, EXFO will, at its discretion, repair, replace, or issue
credit for any defective product, as well as verify and adjust the product free of
charge should the equipment need to be repaired or if the original calibration is
erroneous. If the equipment is sent back for verification of calibration during the
warranty period and found to meet all published specifications, EXFO will charge
standard calibration fees.

IMPORTANT

The warranty can become null and void if:

³ unit has been tampered with, repaired, or worked upon by

unauthorized individuals or non-EXFO personnel.

³ warranty sticker has been removed.
³ case screws, other than those specified in this guide, have been

removed.

³ case has been opened, other than as explained in this guide.
³ unit serial number has been altered, erased, or removed.
³ unit has been misused, neglected, or damaged by accident.

he date of

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED, IMPLIED,
OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL EXFO BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES.

Liability

EXFO shall not be liable for damages resulting from the use of the product, nor shall
be responsible for any failure in the performance of other items to which the
product is connected or the operation of any system of which the product may be a
part.

EXFO shall not be liable for damages resulting from improper usage or unauthorized
modification of the product, its accompanying accessories and software.

EPM-50/ELS-50 23

Warranty 24

Exclusions

EXFO reserves the right to make changes in the design or construction of any of its
products at any time without incurring obligation to make any changes whatsoever
on units purchased. Accessories, including but not limited to fuses, pilot lamps,
batteries and universal interfaces (EUI) used with EXFO products are not covered by
this warranty.

This warranty excludes failure resulting from: improper use or installation, normal
wear and tear, accident, abuse, neglect, fire, water, lightning or other acts of nature,
causes external to the product or other factors beyond EXFO’s control.

IMPORTANT

EXFO will charge a fee for replacing optical connectors that were
damaged due to misuse or bad cleaning.

Certification

EXFO certifies that this equipment met its published specifications at the time of
shipment from the factory.

Service and Repairs

EXFO commits to providing product service and repair for five years following the
date of purchase.

To send any equipment for service or repair:

1. Call one of EXFO’s authorized service centers (see EXFO Service Centers

Worl dw id e on page 26). Support personnel will determine if the equipment
requires service, repair, or calibration.

2. If equipment must be returned to EXFO or an authorized service center, support
personnel will issue a Return Merchandise Authorization (RMA) number and
provide an address for return.

3. If possible, back up your data before sending the unit for repair.

4. Pack the equipment in its original shipping material. Be sure to include a

statement or report fully detailing the defect and the conditions under which it
was observed.

5. Return the equipment, prepaid, to the address given to you by support
personnel. Be sure to write the RMA number on the shipping slip. EXFO will
refuse and return any package that does not bear an RMA number.

Note: A test setup fee will apply to any returned unit that, after test, is found to

meet the applicable specifications.

After repair, the equipment will be returned with a repair report. If the equipment is
not under warranty, you will be invoiced for the cost appearing on this report. EXFO
will pay return-to-customer shipping costs for equipment under warranty. Shipping
insurance is at your expense.

Routine recalibration is not included in any of the warranty plans. Since
calibrations/verifications are not covered by the basic or extended warranties, you
may elect to purchase FlexCare Calibration/Verification Packages for a definite
period of time. Contact an authorized service center (see EXFO Service Centers
Worl dw id e on page 26).

EPM-50/ELS-50 25

Warranty 26

EXFO Service Centers Worldwide

If your product requires servicing, contact your nearest authorized service center.

EXFO Headquarters Service Center

400 Godin Avenue
Vanier (Quebec) G1M 2K2
CANADA

EXFO Europe Service Center

Le Dynasteur
10/12, rue Andras Beck
92366 Meudon la Forêt Cedex
FRANCE

EXFO China Service Center/
Beijing OSIC

Beijing New Century Hotel
Office Tower, Room 1754-1755
No. 6 Southern Capital Gym Road
Beijing 100044
P. R . C H I N A

1 866 683-0155 (USA and Canada)
Tel.: [phone]
Fax: [phone]

[e-mail]

Tel.: [phone]
Fax: [phone]

[e-mail]

Tel.: [phone]
Fax: [phone]

[e-mail]