Here is a straightforward step-by-step guide to help you use it right and smart: Connect the optical power meter to the fiber optic cable for testing. Ensure the connection is good so that you can achieve the best reading. power across any given fiber. This document will serve as an overview of the major features and functions of the device and will offer tips for trouble shooting com on issues in optical networks. If you are looking for a low cost device capable of saving and reporting take a look at the RP460 or. How to Use Optical Power Meter TR-504 | Optical Power Meter Working| Testing OPM, VFL, RJ45 | TRICOM In this video, we walk you through how to use the TRICOM TR-504 Optical Power Meter and explain how it works. REF/dB key: Short press the dB to switch unit, click once nW/dBm/dB to enter the upper clear data, press and hold until REF is displayed on the screen, and set the current optical power as reference value, enter the relative. It's a simple but essential tool that measures the light passing through a fiber whether you are setting up a network, fixing weak signals or checking connections and knowing how to use an OPM can save your time and frustration. Using an optical power meter is not difficult, but it may seem so first since you don't know how to do it. The figures below display the product images.