DIN 4772 1979 Edition, November 1, 1979
Electrical contact (stylus) instruments for the measurement of surface roughness by the profile method
Includes all amendments and changes through Change/Amendment , November 1979
Additional Comments: ENGLISH * W/D S/S BY DIN EN ISO 3274
Published By:Deutsches Institut fur Normung E.V. (DIN)
Scope and purpose
This standard defines concepts used for describing the metrological properties of electrical contact (stylus) instruments for the measurement of surface roughness for which the manufacturer is required to state tolerances .
The intention is to describe principles of the hardware for measuring roughness quantities (e.g. Ra, Rz, Rmax as given in DIN 4768 Part 1 and Pt as given in DIN 4771) and to facilitate understanding between manufacturers and users of these instruments.