Profoscope Proceq - Measuring Range Overview; Factors Affecting Measurements

8 © 2008 by Proceq SA
2.2 The Measuring Range
The pulse induction principle used by Profoscope has a
defined range of operation.
The measuring range is dependent on the bar size. The
expected accuracy of the cover measurement is indicated
in the graphic below. (Complies with BS1881 part 204, for
a single rebar with sufficient spacing).
long measuring
range
Cover depth
measuring accuracy
short measuring
range
Bar size
2.3 Factors Affecting the Measurement
2.3.1 Errors due to Neighboring Bars
All rebars within the sphere of influence affect the reading.
Sphere of influence
400 mm /16 inch
MC
Neighboring bars close to the target bar result in an under-
estimated cover value and an overestimated bar dia-
meter.
i
Note: This effect can be reduced by the neigh-
boring bar correction implemented in the Profo-
scope.
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