Test Fiber Optic Cable; Ensuring Accurate Measurements; Setting A Reference - Fluke Series II User Manual

OneTouch Series II
Users Manual

Test Fiber Optic Cable

This section describes how to use the Network Assistant
with a Fluke Fiber Optic Meter (FOM) to test fiber optic
cable. You can measure optical loss and output power on
multimode or singlemode cable.
The fiber tests require the following:
A Fluke DSP-FOM (Fiber Optic Meter; See "Placing
Orders and Getting Assistance" in Chapter 1 for
ordering information.)
A multimode fiber optic source, such as is included
with the Fluke DSP-FTK (Fiber Test Kit)
Two fiber optic patch cables (provided with the DSP-
FOM and DSP-FTK)
Network Assistant software version 2.XX, or later
(Read "Updating Software" in the Getting Started
Manual for information on software updates.)
W Warning
Never look directly into the fiber optic source
connector or attempt to adjust or modify the
source. Doing so might expose you to
hazardous LED radiation.
4-10
See the instruction sheet provided with the DSP-
FOM/FTK for specifications and maintenance information
for the fiber optic meter and source.

Ensuring Accurate Measurements

To help ensure accurate fiber measurements, do the
following:
Clean all fiber connectors before testing.
Before using the optical source, turn it on and let it
stabilize for 2 minutes.

Setting a Reference

Before measuring a cable's optical loss, set a reference
level by measuring the loss in the fiber patch cables and
connectors, as follows:
1. Make the connections shown in Figure 4-8. Use the
same type of cable as the cable to be tested.
2. From the Network Assistant's top level display, press
(AutoTest). The Network Assistant detects the
active fiber optic meter and the meter's wavelength
setting and displays the fiber test results (Figure 4-7).
Press (Set Ref) from the Network Assistant's fiber
test display.