Bosch PDO Multi Operating Instructions Manual page 14

For steel wire mesh and reinforcements in the scanned structural material,
an amplitude of the measuring indicator f is displayed over the complete
surface. In this case, always use the "Zoom" function for the scan. For steel
wire mesh, it is typical that the indicator for magnetic metals h is displayed
directly above the rebar; the indicator for non-magnetic metals i is dis-
played between the rebars.
Detecting Wooden Objects
When scanning for wooden objects, press the wood-detection button 5.
The wood detection indicator symbol b and the "Zoom" function indicator
d are indicated in the display and the arrow below the "Zoom" function indi-
cator d flashes. The "AutoCal" calibration indicator g and the illuminated
ring 1 go out.
Position the measuring tool onto the surface being scanned. Then press
the "ZOOM" button 4 and keep it pressed. Now the illuminated ring 1
lights up green, the "AutoCal" calibration indicator g is displayed again,
the "Zoom" function indicator d as well as the arrow below it go out.
several times, the wooden object can be indicated quite accurately: The
illuminated ring 1 lights up red and a steady tone sounds as long as the
measuring tool is over the wooden object. The measuring indicator f has
the greatest amplitude over the centre of the wooden object. The "Zoom"
measuring indicator e is inactive when scanning for wooden objects.
Caution: When having placed the measuring tool onto the surface to be
scanned under which a wooden object is coincidentally located, and hav-
ing moved it over the surface, the measuring indicator f, the arrow below
the "Zoom" function indicator d and the illuminated ring 1 flash red. In this
case, start the scan again by repositioning the measuring tool somewhat
offset onto the structure and pressing the "ZOOM" button 4 again.
When scanning for wooden objects, metal objects are sometimes also
indicated as objects found at depths between 20–50 mm. To distinguish
between wooden and metal objects, switch to the detecting-metal function
(see "Detecting Metal Objects"). When an object is indicated at the same
location in this function, then it is clearly a metal object and not a wooden
object. To continue searching for wooden objects, switch back to the
detecting-wood function.
Scanning for "Live" Wires
The measuring tool indicates lines that carry a voltage between 110 V and
400 V with frequencies corresponding to the widespread standard (AC
with 50 or 60 Hz). Other lines (DC, higher/lower frequency or voltage) are
indicated only as metal objects.
"Live" wires/conductors are indicated both during a metal scan as well as
during a wood scan. When a "live" wire/conductor is detected, the indica-
tor a appears in the display. Move the measuring tool over the surface
repeatedly in order to localise the "live" wire/conductor more precisely.
After moving the measuring tool over the surface several times, the "live"
wire/conductor can be indicated quite precisely. If the measuring tool is
very close to the wire/conductor (four or five bars in indicator a), the illumi-
nated ring 1 flashes red and the signal tone sounds with a rapid tone
sequence.
1 609 929 J68 • 30.1.06
With the "ZOOM" button 4 pressed, evenly move the
measuring tool over the surface without lifting off or chang-
ing the applied pressure. While measuring, the felt pads 8
must always be in contact with the surface.
When a wooden object is detected, an amplitude is dis-
played in the measuring indicator f. Move the measuring
tool over the surface repeatedly to localise the wooden
object more precisely. After moving over the same area
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