Working Principle; Using The System - Hilti PS 200 S Manual Del Usuario

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Situations and scanning modes
Situation
Avoiding damage to reinforcing bars when drilling
or core drilling
Determining the position / number and diameter of
bars for loadbearing capacity checks or depth-of-
cover measurements
Large-area scan to determine depth of concrete
cover
For reliable scanning results, the following conditions must be fulfilled
• Concrete surface smooth and flat.
• Reinforcement not corroded.
• Reinforcement lies parallel to concrete surface.
• Concrete does not contain additives or constituents with magnetic properties.
• Reinforcing bars lie within ± 5° of right angle to the scanning direction.
• Reinforcing bars are not welded.
• Neighboring bars are of similar diameter.
• Neighboring bars are at a similar depth.
• Accuracy specifications are valid only for the first layer of reinforcement.
• No interfering influences from external magnetic fields or objects nearby with magnetic properties.
• Bars have relative magnetic permeability of 85–105.
• The scanner wheels are clean and free from sand and grit etc.
• All 4 scanner wheels are in contact and rotate when the scanner is moved across the object to be
scanned.

3.4 Working principle

The scanner is moved directly over the concrete surface. The data collected is stored in the scanner until
it can be transferred to the tablet. The tablet is used for storing large amounts of data and for viewing the
scans. It can also be used for on-the-spot evaluation of scans. The data can also be downloaded to a PC.
The PC software offers advanced analysis options, data archiving functions and the ability to quickly print
out complete reports for documentation purposes.

3.5 Using the system

The scanner can be used without the tablet (for scanning only). The tablet can be carried in the PSA 64 soft
pouch. The first option is advantageous when working in areas that are difficult to access and maximum
mobility is required, such as on a scaffold or ladder. When scanner memory is full (9 Imagescans made, 1
complete Blockscan or 30 m of Quickscan have been recorded) the data can be transferred to the PSA 55
infrared adapter or to the tablet. The tablet can be kept nearby (e.g. at the foot of the scaffold, in a vehicle,
in the site office etc.). When the user intends to make more scans than the scanner is capable of storing in
its memory and wishes to avoid repeated journeys to the tablet, the PSA 55 infrared adapter can be used or
the tablet attached to a belt or carried using the shoulder strap supplied.
3.6 Quickscan detection
The scanner is moved across the surface at right angles to the reinforcing bars. The position and approximate
depth of the reinforcing bars can be determined and marked right away on the surface of the concrete.
3.7 Quickscan detection with accurate depth measurement
Before scanning, the operator is required to enter values for the diameter of the reinforcing bars and the
spacing between the bars. The scan is then carried out as described for Quickscan detection.
3.8 Quickscan recording
Data is recorded automatically as the scanner is moved over the surface. This data is subsequently
transferred to the tablet where it can be evaluated and the average depth of cover determined. If the data
is downloaded to a PC, the information can be evaluated, archived and a report printed. Further evaluation
options allow Quickscan recordings to be imported and evaluated automatically, statistical evaluations
prepared and scans displayed in the form of large-area evaluations.
Printed: 14.11.2016 | Doc-Nr: PUB / 5314765 / 000 / 00
Scanning mode
Quickscan detection, Imagescan or Blockscan
Imagescan
Quickscan recording
English 29