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Zagreb, Croatia

Measurement result without defined metrological traceability does not represent valid metrological information. National laboratory for length (HMI/FSB-LPMD), as constitutive part of Croatian Metrology Institute (HMI), has a responsibility to assure traceability using national and first line standards for length, roughness and angle. In HMI/FSB-LPMD traceability for roughness parameters is assured using calibrated National roughness standards. In this paper calibration of the vertical measuring system of stylus instrument Perthometer S8P using roughness standard is presented. Calibration has been performed according to the recommendations from DKD Guideline 4-2. Based on the model shown in Directive DKD R 4-2, sheet 1, Annex A measurement uncertainty of a roughness parameter Rz determined using Perthometer S8P has been evaluated.

Barsic G.,Ivana Lucica 1 | Runje B.,Ivana Lucica 1 | Simunovic V.,Ivana Lucica 1
Tehnicki Vjesnik | Year: 2015

In 2011 Croatian National Laboratory for Length (HMI/FSB-LPMD) developed calibration standards which have been physically implemented in cooperation with the company MikroMasch Trading OU and the Ruđer Bošković Institute. Specific design of standards makes them suitable for calibration of optical instruments, stylus instruments, scanning electron microscopes, atomic force microscopes and scanning tunnelling microscopes. Therefore, the developed calibration standards greatly contribute to the reproducibility of measurement results for groove depth well as the 2D and 3D roughness parameters obtained by various measuring methods. After a number of measurements conducted on developed standards, based on which new knowledge was acquired, HMI/FSB-LPMD designed a new standard for the field of dimensional nanometrology. This paper presents the design of a new standard that is still suitable for calibration of different types of measuring instruments, i.e. methods, but has a larger measurement capability in terms of measuring ranges in vertical and lateral direction. © 2015, Strojarski Facultet. All rights reserved.

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