Material Ratio
The ratio of the length of surface at any specified depth in the profile to the evaluation length, expressed as a percentage.
Maximum Inscribed Circle
The
Maximum Inscribed Circle is a reference circle of maximum radius that is totally enclosed by the measured profile. (Roundness measurement only)
Mean line
The mean line for the primary profile is determined by fitting a least squares line of nominal form through the primary profile. The mean lines for the roughness and waviness profiles are defined by profile filters as detailed in ISO 11 562.
Measured profile
The representation (usually trace) of the profile obtained by a roundness or surface texture measuring instrument. This is usually raw data and not analysed data.
Measurement Axes
The axes from which the direction of measurement is taken.
Micron
1 Micron is 1,000,000th of a meter or 1,000th of a mm.
Minimum Circumscribed Circle
The smallest reference circle which totally encloses the measured profile. (Roundness measurement only)
Minimum zone circle
The minimum zone circle can be described as the total separation of 2 concentric circles which totally enclose the data and are kept to a minimum separation.
(Roundness measurement only)
Modified Profile
This is the profile that remains after filtering or manipulating the measured profile. For example, Primary, Roughness and Waviness profiles (associated with surface finish) are all modified profiles as the measured data has been filtered.
