Quantitative observation for manufacturing cannot rely solely on human senses, such as vision, hearing, touch, etc., but requires special measuring instruments. Measurement refers to the numerical representation of the size of an object based on a certain standard (unit).
Calibration is a quantitative comparison. Check the reading of the instrument, it is achieved by measuring the actual standard part, and the deviation between the measured value and the actual value is corrected.
A micrometer is a measuring tool used to precisely measure lengths on small scales. In principle, spiral micrometers can be divided into mechanical micrometers and electronic micrometers. The mechanical micrometer is made according to the principle of spiral magnification.
An oscilloscope is a diagnostic instrument that graphs electrical signals. Whether it is a simple or complex product, it includes electronic components, and its design, verification, and the debugging process require an oscilloscope to analyze the many electrical signals that make the product wake up.