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6.2.1 Locating objects
1.
A single scan of the area is sufficient for initial
location of an object.
2.
If no object is found, repeat the scan at right
angles to the direction of the original scan (see
section. 6.1 “Using the tool”).
3.
If you wish to locate an object exactly and mark
its position, simply move the tool in the reverse
direction back across the area already scanned.
4.
If an object appears in the display immediately
below the center line, as shown in illustration A,
the position of the object can be marked on the
surface at the upper marking notch.
NOTE
However, this mark will be accurate only
when the object runs exactly perpendicular to the
direction of scan as the sensor area lies slightly
below the marking notch.
5.
To mark the position more exactly, move the tool
to the left or right until the object detected is
shown at the edge of the display.
6.
Mark the position of the detected object by mak-
ing a mark beside the right or left marking notch
(see illustration B).
NOTE
The object detected lies at the point of in-
tersection of the upper and side marking notches.
6.3 Examples of scan results
NOTE
In the following examples, the signal tone is switched
on.
6.3.1 Steel reinforcing bars
A steel object, e.g. a steel rebar, is present in the
sensor area. To the left and right of this are other
objects which are outside the sensor area. The depth
of the object is approx. 8 cm (3.1 in). The tool emits
a signal tone.
NOTE
Best scanning results will be obtained when the tool
is moved at right angles to the longitudinal rebars,
as described above. Mark the positions of the rebars
found and then shift the tool to the adjoining are above
or below and repeat the scan in order to verify the
position of the rebars and the direction in which they
run. To locate the transverse rebars, pivot the tool
through 90° and scan between the already detected
longitudinal rebars in order to avoid scanning along
a longitudinal rebar.
6.3.2 Copper pipes
A non-ferrous metal object, e.g. a copper pipe, is
within the sensor area. It lies at a depth of approx.
4 cm (1.6 in). The tool emits a signal tone.
en
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Summary of Contents for PS 38
Page 2: ...Menu 10 9 14 13 12 11 4 6 4 16 15 8 7 4 N U 1 2 3 4 4 5 1 ...
Page 4: ...A A B B 4 c b a 5 ...
Page 5: ...6 ...