English–3
1 609 929 H74 • (05.03) T
This unit checks the base material of sen-
sor area
10
in measurement direction
A
to
the displayed measuring depth. Meas-
urement is possible only during move-
ment of the unit in the direction of travel
B
and for a distance of at least 8 cm.
Move the unit in a straight line with
light pressure over the wall so that
the wheels remain in contact with the
wall. Objects are detected that differ
from the material of the wall. In
mode D, the strength of the measure-
ment signals is indicated, in mode 1
and mode 2, the depth of the object
found.
Optimum results are achieved when the
measured distance is at least 40 cm and
the unit is moved over the entire location
to be checked.
The method of operation of the unit en-
sures reliable detection of only those ob-
jects running
traverse
to the direction of
movement of the unit.
Therefore, always move crossways
over the area to be checked.
In mode 1, objects that are clearly larger
than the unit can also be displayed by
movement of the unit in parallel paths.
If several objects are located one over the
other in the wall, the object is indicated in
the display that is nearest to the surface.
Detectable objects:
–
Plastic pipes (e.g. water pipes, empty pipes)
–
Electrical wiring (independent of whether carrying voltage or not)
–
Three phase mains wiring (e.g. to the stove)
–
Extra-low voltage wiring (e.g. telephone, door bell)
–
Metal of all types (e.g. steel, copper, aluminium)
–
Hollow space
Special Measuring Cases
Under unfavourable conditions, the unit cannot detect certain objects
as a result of the principle involved, for example:
–
Empty plastic pipes in cavities
–
Plastic pipes filled with frozen water cannot be found.
–
Metal and damp surfaces with high water content cannot be pen-
etrated. They are sometimes displayed as objects themselves.
–
Damp areas in a wall can possibly be indicated as an object (e.g.
for high water content).
–
For walls made up of several layers, e.g. with wall covering, possi-
bly only the first boundary layer (e.g. hollow space behind the wall
covering) is indicated.
–
Hollow spaces in a wall are indicated as objects.
–
Large cylindrical objects (e.g. plastic or water pipes) can appear in
the display smaller than they actually are.
Before using the unit, ensure that the sensor area 10 is not
moist. Wipe the unit dry with a cloth as necessary.
Switching On/Off
Switching on:
Press the
“on/off”
button
5
or the
“start”
button
6
. The illuminated
start display appears.
Before beginning the measurement (see
Measuring Procedure
), an ex-
planation of the functional method of the unit can be called up in the
display
3
by pressing the
“mode”
button
8
(duration approx.1 min).
Functional Method
Putting into Operation
A
B
B
10
dtectc_bu_1609929H74_t.fm Seite 3 Montag, 21. März 2005 1:49 13
