Some users told Fotec they wanted an instrument that could also determine a fiber's length. Premises and campus optical waveguide systems typically use short lengths of multimode fiber. Their LED transmitters operate at 850 nm and 1300 nm wavelengths. Fotec's unit doesn't have a typical 100 meter cable length limitation. Indeed, the company claims the unit is more accurate at longer cable lengths.
Links also involve fibers in pairs.
For that reason, Fotec designed its ACT2 to test pairs of cables simultaneously. Users can set up the meter from a PC, or enter alphanumerical cable names from the front panel buttons. In use the system graphically guides a user through calibration and testing, then stores the acquired data on up to 250 cables and 500 fibers. To calibrate before testing, the two units in the kit are brought together to set the reference for loss, watching the prompts on the ACT2's screen. One thing that really strikes me is the handheld's small size.