The C.A 1727 is about his rotary switch is easy to use. Measurements can be done in various ways with or without any contact. The C.A 1727 is designed for data evaluation with the Software Tachograph supplied as standard with a memory and a USB interface.At a non-contact optical measurement is a shining mark onto the object to be measured glued. For measurements with contact using accessories by a mechanical adapter (cylinder, cone or measuring wheel) rotary speeds in pulses converted, which, in turn, by the tachometer. In the digital display will be a bar graph with 42 segments, preset functions, alarm limits, etc.. The 7 units (U/min, RPM, Hz, etc.) can be accessed directly via the rotary switch and each button is assigned to exactly one function (MIN MAX, smoothing, warning limits, etc.).This text is machine translated.