Extech Instruments MO500 Manual de usuario

MicroMeter

Optical Power Meter

Operations Manual

Firmware Version 1.20e

September 15, 2003

Part Numbers: MO500, MO510, MO520Extech

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech MO500 Series Info Page

Table of Contents

Preface ii

Why Use An Optical Power Meter? ii

Checking the MicroMeter Firmware Version ii

Unit 1 - Introduction

Description 1-1

Applications 1-1

General Features 1-2

Keyboard Entry Method 1-2

Unit 2 - Meter Functions

Power ON 2-1

Power Units Supported by the MicroMeter 2-1

Wavelengths Supported by the MicroMeter 2-2

“Zeroing” the MicroMeter 2-2

Monitor Mode 2-2

Main Menu 2-3

Meter Setup 2-3

Manual Reference Method 2-4

Stored Data Menu 2-5

Power OFF 2-5

Unit 3 - Fiber Certification

Overview 3-1

Operation 3-1

Power ON 3-1

Fiber Certification 3-1

Definition of a Link 3-1

Required Equipment 3-1

Preparation 3-1

Reference Method 3-1

Step 1 - Select Link 3-2

Step 2 - Define Link 3-2

Step 3 - Take Readings 3-3

Step 4 - Stored Data 3-3

UNIT 4 - Appendices

Appendix A - Decibel Review 4-1

Appendix B - Dynamic Range Review 4-2

Appendix C - Glossary 4-2

Appendix D - MicroMeter Specifications 4-6

Appendix E - Warranty Information 4-6

Appendix F - Cleaning and Care Instructions 4-7

Appendix G - Accessories 4-8

Appendix H - Link Budget Calculation Worksheet 4-9

Appendix I - Reference Jumper Setup 4-10

Standards organizations such as the TIA or the ISO/IEC provide performance standards that the cabling plant must adhere to in order

to support high-speed protocols such as Gigabit Ethernet. Fiber can be tested against these standards, ensuring that it is able to

handle the high amount of traffic with a maximum amount of reliability.

These standards organizations also provide standards for administration of the cabling plant. These standards require a fiber link to be

certified; that is, a report must be generated from appropriate test equipment for tracking and auditing purposes. These reports can

also be used as verification of compliance to performance standards in case a question comes up about the quality of an installation.

These signed documents cover the installer from liability provided that the link meets specified performance standards.

Our optical fiber power meters are designed with these standards in mind because we understand the importance of qualifying your

fiber installations with standards-compliant test equipment. The meter you have just purchased also prints professionally formatted

reports showing the conformity to these popular industry standards. You can print out these reports as a record of the original

conformity to quality set by the standards. These documents signed by all associated parties may prove valuable in any future disputes

concerning the installation.

Why Use An Optical Fiber Power Meter?

Checking The MicroMeter Firmware Version

This manual is written for the MicroMeter firmware version 1.20e. Follow the instructions below to verify the meter’s firmware version.

.................

.............

SN:MX10001

V1 20e.

Company Name

Company Phone

Serial Number

Firmware Version

1) Press to start up the meter.

2) After the initial boot-up screen, the display should look like the diagram below. This screen only remains viewable for

approximately 2 seconds.

If the firmware version is not V1.20e, contact our tech support for the correct version of the manual.

PREFACE

The MicroMeter can be used for several applications. A listing of these applications and their descriptions follows:

Attenuation and Loss Measurements - After a fiber cable has been installed and terminated, it must be tested to determine if the

fiber is installed correctly. A comparison of the actual power measurement and the reference value determines the loss of the fiber link.

Fiber Network Certification - The MicroMeter uses a loss wizard that is used for fiber certification against the popular industry

cabling standard called the TIA/EIA 568. The user is prompted to enter several parameters, which allows the MicroMeter to calculate

a certification reference value and store it in the meter. As the user stores data points in the meter using the loss wizard, the actual

power level of the link is also stored. The data is then downloaded into our Reporter software, where the actual power value is

compared to the reference value. Certification reports can be printed out with details or summaries of the fibers being certified.

Fiber Continuity Testing - Continuity can be measured with the MicroMeter by placing a calibrated light source on one end of the

fiber and the MicroMeter on the other end. This is also a simple way to measure the attenuation of the fiber.

Patch Cord Testing- Fiber links that are producing incorrect results may have bad patch cords. The MicroMeter can be used to test

the attenuation of a patch cord to see if it is usable, or should be thrown out.

Active Equipment Optical Power Measurements - Active equipment needs to be measured periodically for correct power

levels and stability. The transmitters in this equipment have a known power value. The MicroMeter can be directly attached to this

equipment via a patch cord to check whether the transmitter is stable and is within the manufacturer’s specified power range.

Applications

1-1

Description

The MicroMeter is a high accuracy, high resolution, microprocessor controlled optical power meter. The meter has a wide dynamic

range making it ideal for both single and multi-mode fiber testing.

It has an attractive handheld case, a backlit graphical liquid crystal display, and 18-key keypad for easy data entry. The

It will operate for over 100 hrs on a single 9v battery and has built in auto shutdown.

The MicroMeter includes a built-in link wizard that helps the user easily calculate the allowable loss for the fiber runs that they will be

measuring. The meter stores physical fiber information for up to four links. Link information includes: link name, date, fiber type, fiber

length, connectors, splices, temperature, and calculated or entered reference power values for four wavelengths. In addition the meter

will store up to 1000 measured data points with labels. Each value includes the fiber type and link.

The stored information can be selectively viewed, edited (measured again), printed, or deleted. The meter will print formatted reports

of selected stored data directly using the built in serial port, or all of the stored data can be downloaded to a computer spreadsheet or

our free Reporter software to produce professional-looking formatted certification reports.

meter comes

with a small state-of-the-art UNIVERSAL adapter that is fully reliable for the use of ST, SC, FC or any 2.5 mm connectors whichsaves

money on consumables (test cables wear out).

INTRODUCTIONUNIT 1

2.5mm UNIVERSAL ADAPTER PORT - accepts standard 2.5mm ferrule connectors

(ST, SC, FC).

COMPUTER PORT - port for downloading data from the meter to a PC via serial cable.

LIQUID CRYSTAL DISPLAY (LCD) - displays power readings, menus, and

information necessary for operation of the meter. The elements of the display are

discussed in the appropriate units.

FUNCTION KEYS - activate the options on the Function Options Menu.

ALPHA NUMERIC KEYS - enter letters, numbers, and symbols into field prompts.

OPTIONAL LED LIGHT SOURCE - press the key to activate the optional LED light

source

MENU KEY - used to enter the menu system.

DONE KEY - activates certain menu options.

BACK LIGHT KEY - toggles the LCD back light ON or OFF.

ON/OFF KEYS - turns the meter ON or OFF.

General Features

Several screens in the MicroMeter menu system require the user to enter some input, e.g. a fiber length measurement or a descriptive

name for a fiber run. This feature allows the MicroMeter to become more user-friendly.

ALPHA-NUMERIC FIELDS. These fields allow the user to enter either a number, a letter, or a special character. This is accomplished by

pressing and holding the key until the desired character appears. When the key is released, the cursor automatically advances to the

next position.

NUMERIC FIELDS. These fields are for numeric input only, e.g. fiber length, user-defined reference values, etc. The cursor will

automatically advance once a number key is pressed. EXCEPTION: some numeric operators may be required, such as the minus sign,

or a decimal point. Special characters reside under the key. In this case, they are treated like alpha-numeric fields.

Press the key when character input is complete.

DONE

Keyboard Entry Method

1-2

INTRODUCTIONUNIT 1

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com

2-1

Operation

1) Press the button.

2) After a few seconds, a screen will appear that looks like the one below, which is called Immediate Mode.

Power On

-20 45

_____________________

UNITS

............

|STORE |WAVE

dBm

ABS

68%

850nm

dBm (ABS)

dB (REL)

µW (ABS)

850nm

1300nm

1310nm

1550nm

Power

Measurement

Power Units

Temperature

Battery Life

Wavelength

F1 F2 F3

Toggle

Power

Units

Store

Power

Reading

Toggle

Wave

Lengths

Immediate Mode

FBR:00

Link Name

Run Number

Power Units

The MicroMeter is capable of displaying power readings in three different units. The user may toggle through these units by pressing

dBm (ABS) - This is an absolute (ABS) power measurement. It shows how much optical power is being received by the photodetector

in decibels referenced to a milliwatt (dBm).

dB (REL) - This is a relative (REL) power measurement. It shows the amount of optical power being received by the photodetector

relative to a user-defined reference power (i.e. “zeroing” the meter). If a reference value has been set, toggling to REL mode will show

the user how much optical power is being lost in the link.

µW (ABS) - This is an absolute (ABS) power measurement. It shows the amount of optical power being received by the photodetector

in microwatts, or millionths of a watt.

F1.

METER FUNCTIONSUNIT 2

Measurements can be taken for four different wavelengths in the MicroMeter. These wavelengths are 850, 1300/1310, and 1550nm.

All wavelengths are traceable to the National Institute of Standards and Technology (NIST). The user may toggle through these

wavelengths by pressing .F3

This function allows the user to set references for each wavelength for fiber attenuation

testing.

After connecting a light source to the MicroMeter:

1. Toggle the wavelength until it matches the wavelength of the source.

2. Press to zero the meter. The user will be prompted to verify the set reference.

3. Press either to set the reference, or to abort.

F1 F3

NOTE: When using laser sources, allow the laser to warm up according

to the manufacturer specifications to ensure accurate references.

NOTE: When zeroing multiple wavelengths, do NOT remove the patch

cord from the light source. Removing the patch cord from the light

source will invalidate the optical reference for the wavelength that was

just set. Use a separate patch cord for each light source port.

Operation, cont.

Wavelengths

“Zeroing” the MicroMeter in Immediate Meter mode

2-2

-20 45

_____________________

UNITS

............

|STORE |WAVE

dBm

ABS

68%

850nmFBR:00

Monitor Mode sends absolute power measurements in a comma delimited format to the

serial port in real time. A terminal program is required to view data in real time.

To enter Monitor Mode, press , and press to exit Monitor Mode..5 DONE

Monitor Mode

-20 45

_____________________

UNITS |STORE | WAVE

dBm

ABS

68%

850nmMonitor...

FIBER LINK #1

METER FUNCTIONSUNIT 2

Operation, cont.

Main Menu

Advanced meter functions can be configured from the Main Menu. Options 1 through

4 are listed in a step-by-step order for certifying fiber links and will be explained in

greater detail later in this manual. Option 5 is explained below. Press to enter

the menu.

- This option allows the user to select the fiber link to be used for the

test, as well as editing its descriptive name and test date.

- This option is used to define the parameters of the fiber link which

<1>SELECT LINK

<2>DEFINE LINK

are used to calculate the link’s PASS/FAIL threshold.

- This option takes the user to the main display screen, where they can view power readings, store data

points, and switch wavelengths.

-This option allows the user to view and download the data points previously stored in the meter.

- This option allows the user to edit the owner information, and adjust the LCD contrast.

Pressing from the MAIN MENU will return the user to the power reading display screen.

<3>TAKE READINGS

<4>STORED DATA

<5>METER SETUP

DONE

2-3

<1>SELECT LINK

<2>DEFINE LINK

<3>TAKE READINGS

<4>STORED DATA

MAIN MENU

<5>METER SETUP

Meter Setup

From the MAIN MENU, press to enter the METER SETUP menu. From this menu the user can change company information, such as

name and phone number, and can also adjust the contrast of the LCD screen.

– changes the company name. Edit the company name and press to continue.

– change the company telephone number. Edit the company telephone number and press to continue.

– adjust the contrast of the LCD display. Press or to set the contrast down or up. Press to continue.

F1 DONE

F2 DONE

F3 F1 F3 DONE

METER FUNCTIONSUNIT 2

Operation, cont.

2-4

Manual Reference Method-recommended for advanced users only

The Micro can be used to certify fiber links (shown in detail in the next unit) or to measure link loss by setting a manual reference. The

manual reference method is used to measure the actual loss in a fiber link, and it is recommended that only those users who are very

familiar with calculating link budgets should use this method.

1) From Immediate Mode, press to enter the MAIN MENU.

2) At the MAIN MENU, press to SELECT LINK. Highlight a link, and press to change the name and/or date. Press to

continue.

3) Press to LOAD the selected link, and press to continue.

4) From the MAIN MENU, press to DEFINE LINK. Press to SET A MANUAL REFERENCE.

1 F3 DONE

F2 DONE

2 2 NOTE: setting a reference with

this method will overwrite any previous certification or manual references.

F1 F2

DONE DONE

5) Press to scroll through the wavelengths, and press to set the manual reference. The asterisk shows the currently selected

wavelength.

6) Type in the manual reference using the keypad, and press to continue. Press to return to the MAIN MENU.

7) Press to return to Immediate Mode and TAKE READINGS. Data storage is covered in more detail in the next unit.

METER FUNCTIONSUNIT 2

Operation, cont.

Stored Data Menu

The STORED DATA menu allows the user to manipulate data that is stored in the MicroMeter.

- this option allows the user to view, edit, or load any data point that was previously stored in the

MicroMeter. The VIEW/EDIT/LOAD screen initially loads with the first data point stored in memory. To go to a different data point, use:

to scroll through the fiber names; to scroll through the fiber runs for the currently selected fiber name; or to scroll through the

wavelengths for the currently selected data point.

Pressing will LOAD the selected data point, and return the user to Immediate Mode showing the selected data point. From there, the

user can continue saving data from that point.

Pressing will EDIT (or reshoot) the selected data point. The user will be returned to Immediate Mode to re-save the data point. After

the data point is re-saved, the user is returned to the last data point that was previously stored.

- this option allows the user to print data points to a serial device, such as a serial printer or terminal program.

The printout is formatted in an easy-to-read format.

- this option allows the user to delete a range of data points, or delete all of the data points from the meter. This

should only be done after the data points have been downloaded into the PC with Reporter software.

- this option allows the user to download data either to Reporter software, or to a terminal program. Data

downloaded to a terminal program is in a Comma-Delimited format for easy placement into a program that can format Comma-

Delimited files. The PC must be connected to the meter via the MicroMeter download cable.

If the user is downloading to Reporter, then no further action is necessary from this screen. Reporter will handle the data transfer.

If the user is downloading to a terminal program, then the user must start the terminal program, and press to begin the download.

<1>VIEW/EDIT/LOAD

F1 F2 F3

<2>PRINT RANGE

<3>DELETE RANGE

<4>DOWNLOAD DATA

Power OFF

Press to shut down the MicroMeter. The user will be prompted to verify shutdown.OFF

2-5

METER FUNCTIONSUNIT 2

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com

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