The SJ-310 Portable Surface Roughness Measurement Surftest possesses a 7.5” colored graphic LCD with touch panel that ensures improved operability. It supports 16 languages with a high speed printer. It also features a built in joystick which allows efficient positioning. A simple input function is present for calculations in accordance to ISO/JIS roughness standard drawing instruction symbols. With a SJ-500 X axis drive unit Measuring range, 50 mm Resolution, Measuring speed of 0 to 20 mm per second and Traverse direction of 0.02 to 5 mm per second. With a manual know that ensures the fine positioning of small stylus.