Measurement uncertainty of surface contour with complicated form

Modem manufacture performs also to the accuracy of surfaces of the details with complicated form quite high demands. We can estimate the conformity of the produced details form to the demands of technical specification only by measurement. It is possible in Tallinn University of Technology laboratory of metrology to measure the surface contour of details with complicated form using the inductive surface roughness and form measurement instrument "Perthometer Concept". Aforementioned measuring instrument has previously calibrated, but to confirm the reliability of the measurement results characterizing the surface contour we carried out in the laboratory of metrology the special investigation. In the measurement of the surface contour has composed the measurement model and has experimentally determined the values of the input quantities and their distribution. As a result of the research work in TTU laboratory of metrology we can characterize the reliability of the measurement results of the surface contour measurement with the expanded uncertainty.