Users Manual Owner manual

Chapter 7: How to Certify Fiber Cabling
Requirements for Reliable Fiber Test Results
167
About Test Reference Cords and Mandrels
Use only test reference cords (TRCs) that have low loss:
 Maximum loss for multimode TRCs: 0.15 dB
 Maximum loss for singlemode TRCs: 0.25 dB
To make sure your test results are accurate as possible:
 Inspect the endfaces of the TRCs every 24 to 48 tests and clean
them when necessary.
 Use the TRC VERIFICATION wizard available for the 1 Jumper
Method and 3 Jumper reference methods to measure the
losses of the TRCs. The losses of the TRCs are included in the
loss measurements for links, so you must make sure the losses
are very small. The wizard saves the results of the TRC tests to
show that your TRCs were good. IDs for these results start with
“TRC”, show the date and time of the test, and have an for the
test result.
About the EF-TRC (Encircled-Flux Test Reference Cords)
The CFP-MM and CFP-QUAD kits includes the EF-TRC (encircled
flux test reference cords), which have signal conditioners on the
cords. When you use the EF-TRCs with the CertiFiber Pro
multimode modules, your tester complies with IEC 61280-4-1, ISO/
IEC 14763-3, and TIA-526-14-B standards for encircled flux.
Measurements made with compliant equipment change less than
10 % for losses of 1 dB or more when you make them at different
times or with different equipment that is also compliant.
Note
The IEC 61280-4-1, ISO/IEC 14763-3, and
TIA-526-14-B standards require your optical loss
test set to comply with encircled flux standards at
850 nm with 50 µm/125 µm fiber. The standards
recommend compliance at 850 nm with 62.5 µm/
125 µm fiber and at 1300 nm with 50 µm/125 µm
and 62.5 µm/125 µm fiber.