Refers to the physical and mechanical process for recording a measured variable. Example: pressure measurement using a pressure gauge, , piezoresistive or analogue or digital measuring procedure or direct or indirect measuring methods.
The choice of measuring procedure is based on the following criteria:
- required measuring accuracy (resolution, hysteresis),
- measuring range,
- upper and lower frequency limit (with , the measuring procedure must be faster than the controlled subsystem),
- electrical and mechanical disturbance variables,
- behaviour in response to environmental influences and the like.