3. June 2024 © Copyright 2024, PROCEQ SA 28
Figure 32: GP app software image processing manual input or hyperbola fitting for estimation of Concrete dielectric ε
5.6.4.3 Tag object set depth dielectric calibration
When the concrete dielectric (ε) is unknown, but one object’s depth (such as rebar) is
precisely known from a cover meter or inspection hole then the dielectric can be
calibrated by setting the depth of the object using a tag in “tag setting input depth as
shown in Figure 33.
We recommend the use of cover meters such as Profometer PM8000 to precisely
estimate the depth of rebar in shallow layers. Cover meter technology (eddy-current) is
not influenced by the concrete dielectric.
Figure 33: GP app software tag object set depth for calibration of concrete dielectric (ε)