Usage method With proper clamp head, clamp the measured optical fiber (bare or tail) tightly into the test area, and then turn on for testing. Product characteristics Relative Optical Power in Digital Display Optical Fiber Portable style, without interrupting optical fibers, can distinguish the direction and frequency of light Adopt the "one-key-through" operation mode to make the operation simple and convenient. Provide appropriate adapters for bare fibers and various tail fibers _Can identify three commonly used signal frequencies, namely 2KHz, 1KHz, 270Hz. 1. A 1310 or 1550 nm laser source (frequency 270, 1K or 2Khz) is added to one end of a large number of optical fibers to be sought. 2. At the other end, all optical fibers are tested successively with the optical fiber identification instrument. If a power, direction or frequency indication is found, the optical fiber is the one to be sought. The matching fibers of this optical fiber identification instrument are: 3mm or 2mm (optical fiber jumper), 0.9mm optical fiber jumper inner cable (tight sheathed fiber), 0.25mm bare fiber (bare fiber with loose sleeve removed). since the international air does not allow contains flammable and explosive goods, so the unity does not contain the battery delivery, thank you for understanding!