AS/NZS 2891.14.3:2013 PDF Download

AS/NZS 2891.14.3:2013 is a standard that outlines the methods for calibrating the density systems and depth factor systems of a nuclear thin-layer density gauge using standard blocks and plates. By calibrating the density systems, the density calibration equations are derived, which establish the relationship between the density count ratio and the field density reading. Similarly, by calibrating the depth factor systems, the depth factor calibration equations are derived, which define the relationship between the depth factors and the thickness of a surface layer.

It is important to note that the gauge calculates the density of a surface layer of a specified thickness by utilizing the densities measured at two different backscatter systems (system 1 and system 2) and the depth factors for the specified thickness. The calibration equation is adjusted for each material being tested based on measurements of field density, as described in AS/NZS 2891.14.2.