Set your meters to 1310-1625 nm for single-mode fiber cables (which have 2 ports on each end and is almost always yellow). Every testing kit has different menu controls and buttons. Related: Fiber Optic Connectors – Identification Guide Regularly testing fiber optic cables helps minimize network downtime, lengthens the network's longevity, reduces maintenance. The CertiFiber Pro is a duplex tester fiber loss certification tester, capable of testing the optical loss and length of two fibers at a time. But it also allows for the reporting of length. Corning recommends that all fiber optic systems be tested to a minimum set. Fiber Optic Testing Testing is used to evaluate the performance of fiber optic components, cable plants and systems. As the components like fiber, connectors, splices, LED or laser sources, detectors and receivers are being developed, testing confirms their performance specifications and helps. Here are some steps for testing single mode fiber optic cable: Step 1: Gather equipment To test a single mode fiber optic cable, you will need the following equipment: - Light source: a device that emits a specific wavelength of light to allow detection of any breaks or faults in the fiber optic. In this article, we explore why fiber optic cable testing is essential, delve into three key testing methods, and explain how to determine the best approach for your needs.