Bosch Multi-Detector DMD4 - Manual (Page 7)

-7-
Scanning in Wood-Detection Mode
The wood-detection mode actually detects
more than just wood substructures (studs and
joists). It may also detect metal and other
dense materials such as water-filled pipes
plastic pipes near the back of the surface in
the wall or ceiling. To help identify wood
substructures, first conduct a metal scan and
mark the location of any detected metal items.
Then conduct a scan in the wood-detection
mode. Items that are detected in the wood-
detection mode but not in the metal-detection
mode are items that are possibly wood
substructures.
To scan for wood objects,
1. Press the wood detection mode button
5.
• The wood mode indicator b and the
“ZOOM” indicator d are shown in the
display, the arrow below the
“ZOOM”
indicator d flashes, and the “AutoCal”
calibration indicator g and the illuminated
ring 1 go out.
2. Position the multi-detector onto the surface
to be scanned.
3. 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, and the “ZOOM” indicator
d as well as the arrow below it go out, all
indicating that the multi-detector is calibrated
for the wood scan.
4. After the multi-detector has
been calibrated and while
continuing to press the
“ZOOM” button 4, move the
multi-detector uniformly over
the surface without lifting it off
or changing the applied
pressure. During the scan, the
felt pads 8 must always have contact with the
surface.
• When an object is detected, an amplitude is
displayed in the main measuring indicator f.
Move the multi-detector over the surface
repeatedly to locate the object more
precisely. After moving over the same area
several times, the object can be indicated
quite accurately: The illuminated ring
1 lights
up red and a steady tone sounds as long as
the multi-detector is over the object. The
main measuring indicator
f has the greatest
amplitude (as represented by the number of
bars shown in the main measuring indicator
f )
over the center of the object.
Note: While the “ZOOM” button 4 is pressed
during the wood scan, the “ZOOM” feature
and ZOOM measuring indicator
e are inactive.
Notes:
•
If the scan (and thus calibration) starts
over a dense object, such as a stud or a
pipe, and is then moved across the
surface, the main measuring indicator f and
the arrow below the “ZOOM” function
indicator
d flash and the illuminated ring 1
flashes red, indicating a calibration failure. If
this happens, move the detector horizontally
to a different location and start the scan
again (Fig. 4).
• During a wood scan, metal objects at
depths between 3/4" and 2" may also be
detected. To help distinguish between
wood and metal objects, switch to metal-
detection mode (see “Detecting Metal
Objects”). When an object is indicated at the
same location in the metal-detection mode,
then it is likely a metal object or a wood stud
or joist with nails or screws in it. To continue
searching for wood objects, switch back to
the wood-detection mode.
PIPE
STUD STUD STUD
MULTI-DETECTOR
AT PROBLEM
LOCATIONS FOR
STARTING
“WOOD” SCAN
MULTI-DETECTOR
AT GOOD
LOCATIONS FOR
STARTING
“WOOD” SCAN
WALL
FIG. 4
BM 2609140574 08-08 9/3/08 8:40 AM Page 7