About The Reference; Set The Reference For Loss Measurements - Fluke MultiFiber Pro User Manual

About the Reference

The reference is the baseline power level for loss
measurements. Regular referencing helps account for minor
variations in source power and connection integrity. Also,
since the reference is the baseline for measurements, the
losses of the test reference cords and adapters used for
referencing are excluded from test results.
For the most accurate test results, you should set the
reference at these times:
•
At the beginning of each day.
•
Anytime you reconnect a test reference cord to the
source.
•
Anytime you see a negative loss measurement.

Set the Reference for Loss Measurements

W
To get the correct polarity indication when you
measure loss, you must use type B test reference
cords when you set the reference.
1 Clean the connectors on the meter, source, and a test
reference cord.
2 Turn on the meter and source and let them warm up
for 10 minutes. Allow more time if the equipment has
been stored above or below ambient temperature.
3 Make connections to set the reference. Figure 8 on
page 21 shows reference connections for links with
unpinned connectors. Appendix B shows connections
for links with other types of connectors and for fiber
modules.On the source, hold down
to see the setup menu, then select these settings:
• SCAN ALL: ON
• MODE: 2 kHz does not show
How to Measure Loss
Caution
for 2.5 seconds
(continued)
19