© 2017 Proceq SA
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Three demo files are stored on the Profometer 6 Touchscreen in the ex-
plorer under Demo Files and the document “Profometer 650 AI Demo
Files Tutorial.pdf” under Information\Documents.
Try out different slider positions to get familiarized with the display of the
signal strength color spectrum, e. g. the extreme positions:
O
- and
G
-slider lowest position:
Full color spectrum, full Signal
Strength range (of actual meas-
urements)
O
- and
G
-slider highest position:
Full color spectrum, highest
Signal Strength (shallower re-
bars) only
O
- highest,
G
-slider lowest position:
Blue/violet only, highest Signal
Strength (shallower rebars) only
O
- lowest,
G
-slider highest position:
Only grey color displayed, Sig-
nal Strength beyond actual one
To sharpen the color spectrum set “Sharpen”.
3.2.4. Practical Hints
Measuring diameter and cover
The procedure for evaluating the diameter of the reinforcing bar and
cover is as follows:
• Map out the actual grid on the surface of the element using the Locat-
ing Mode or Single-Line Mode.
• Evaluate the rebar layout and determine the ideal location for measur-
ing diameter and cover according to the minimum spacing require-
ments (see Figure 29); if the spacing S
1
of parallel rebars is between
5 cm and 13 cm (2.0 ” to 5.2 ”), set the respective Neighboring Rebar
Correction value first.
• Measure the diameter and use the derived value as setting for cover
measurement
NOTE! The Determination of the rebar diameter is limited to a
maximum cover of about 63 mm (2.50 inch)
Do not use the Spot Range when measuring a diameter
S
2
S
1
S
1
>75 mm
>3 ”
MC
S
1
> 5 cm / 2 inch (with Neighboring Rebar Correction)
S
1
> 13 cm / 5.2 inch (without Neighboring
Rebar Correction)
S
2
> 15 cm / 6 inch
Figure 29:
Minimum spacing for diameter measurement
Diameter measurement accuracy is a complicated function of both first
and second layer rebar size and spacing; for all practical purposes, when
the minimum spacing requirements are met (see Figure 29 as stated in
the Technical Specifications, S
1
> 5 cm / 2 inch, S
2
> 15 cm / 6 inch) it
can be summarized as stated the Technical Specifications, that is to say
±1 rebar size.
When a certain diameter assessment is required for structural purposes
it is advisable to use
Profometer 6 diameter estimation as a prelimi-
nary homogeneity check,
in order to define how many possible different
rebar sizes are involved.
A direct observation on an open spot is then
advisable on every different location.
In multiple layer arrangements (see Figure 30) the deeper rebars may af-
fect the diameter measurements on the shallow ones, causing the meas-
ured values to be overestimated (see Figure 30).
