4
Product Description
© 2007 Proceq SA
2.3
Universal Probe
2.3.1
Functioning
The universal probe is designed to function in relation to
the direction. This means it reacts most sensitively to the
rebars parallel to its longitudinal axis, and least sensitive-
ly 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 over them sideways for
scanning.
The probe has both a small and a large measuring
range. Use the
←
and
→
keys to switch over between
the two measuring ranges. The active measuring range
is displayed in the measuring display (see Fig. 5.1).
The large measuring range should only be used if the
concrete cover is larger than is shown in the intersection
point of the curves in Fig. 2.4. If the bar diameter is 16
mm, this applies for a cover of approx. 60 mm.
2.3.2
Measuring Ranges and Accuracy
Fig. 2.3
Measuring ranges and accuracy of the universal
probe
Key:
Ø : Bar diameter in mm
#:
Bar diameter in «Bar size #»
---: Lowest accuracy limit required by the standard
BS 1881: Part 204: ±2 mm or ±5 %
PROFOMETER 5
+
measures up to 50 % more accurate-
ly than required by this standard.
The size of the two measuring ranges of the universal
probe depends on the bar diameters. The accuracy of
the concrete cover indication refers to individual bars.
See also Fig. 2.4.
