Certain covermeter uses universal probe and the probe is designed to function in relation to
the direction. This means it reacts most sensitively to the bars to its longitudinal axis, and
least sensitively to the ones at right angles to its longitudinal axis. For this reason the probe
should be positioned parallel to the bars to be tested and moved across them when scanning
[3]
. With this improved design, the effect of the scan location relative to secondary bars is
likely reduced.
In this study, covers were measured on N24 bar block in three different ways: Scan1 –
between two secondary bars, Scan2 – exactly on top of a secondary bar, Scan3 – away from
the secondary bars. Figure 7 shows the scan locations relative to the secondary bars.