Fluke FOS-850 Operating Manual

FOM, FOS 850, FOS 1300, FOS 850/1300

Fiber Optic Power Meter

Fiber Optic Light Source

Instruction Sheet

Introduction

The Fiber Optic Power Meter (FOM) measures optical power on
fiber optic cables. An FOM indicates any power loss on tested
cables using any digital multimeter (DMM) or graphical
multimeter (GMM) that has a 10 MΩ input impedance, standard
diameter banana jacks, and mVdc capability. The Fiber Optic
Light Source (FOS) is used as a light source with the FOM or
other fiber optic meters.

Safety Information

All FOSs have been tested according to IEC 1010-1 and
IEC 825-1 and meet all requirements for a Class 1 LED Product.

To ensure the FOS is used safely, read the following warnings:

P Warning P

To avoid possible exposure to hazardous invisible LED
radiation and to prevent eye damage:

• Never look directly into the aperture (Figure 2) of the ST

connector.

• Do not open the case; no serviceable parts are inside.

Send the source to a authorized service center for
calibration or repair.

• Do not adjust or modify the source; LED sources may

exceed Class 1.

• Do not use magnification at the ST connector output.

• Caution - Use of controls or adjustments, or performance

of procedures other than those specified herein may
result in hazardous radiation exposure.

®

PN 200631 May 1996 Rev. 2, 2/97

1996, 1997 Fluke Corporation. All rights reserved. Printed in U.S.A.



FOM Features

DMM Plugs

FOM

FIBER
OPTIC
METER

1550
1300

850

OFF

Figure 1. Fiber Optic Power Meter

FOS Features

FOS 850

FIBER
OPTIC
SOURCE

850

OFF

Battery Indicator LED

Function Switch

Input Connector (ST)

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Battery Indicator LED

Function Switch

Output Aperture
Connector (ST)

Figure 2. Fiber Optic Light Source (850 Source Shown)

Clean Connectors

Turn the FOS off before cleaning. To ensure proper operation,
clean internal portion of connectors with a low-lint optical grade
cleaning swab and optical grade alcohol, and a can of filtered
compressed air.

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