BEHA UNITEST 9038 Mode D'emploi page 14

Operation
Figure 5
If the UNITEST Wallscanner is lifted from the scanning
area during operation in the NORMAL mode, the RESET
warning will light.
If the wall is especially thick or dense, the center bar of
the LCD may not light while scanning in NORMAL set-
ting. If this occurs, the lighting of the most centered
LCD may be interpreted to indicate the stud edge. Or,
switch to the DEEP mode to locate the stud.
Calibrating in METALL Setting:
For maximum sensitivity, calibrate the UNITEST Wallscan-
ner in the air, away from the surface before scanning in MET-
ALL mode. Press and hold the activation „ON / MODE",
switch till the bargraph is in the display. Then let the activa-
tion switch go. The READY indicator lights.
Scanning in METALL Settings:
" After calibrating away from the scanning surface, place
the UNITEST Wallscanner securely to the surface and
begin to slide the UNITEST Wallscanner horizontally.
" Once the UNITEST Wallscanner begins to detect metal,
the LCD bars will move one bar at a time towards cen-
ter. When the UNITEST Wallscanner displays the maxi-
mum indication, mark this point with a pencil.
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" Continue sliding the UNITEST Wallscanner horizontally
until the bars return to the side of the display, then re-
verse the direction of the unit to locate the other maxi-
mum indication. Mark this point with a pencil.
" The center of the two marks is the center of the metal
object.
The audio signal sounds at the third LCD bar.
The RESET indicator may light while scanning if the
UNITEST Wallscanner was calibrated directly over
metal.
While scanning for metal, the detection of the metal ob-
ject may appear wider than the actual size. To obtain
finer resolution, (less sensitivity) calibrate the
UNITEST Wallscanner over the first set of two marks.
Scan from both directions and mark the new and nar-
rowed maximum detection points. Once again, the cen-
ter of the two marks is the center of the metal object.
This technique can be sequentially repeated until the
UNITEST Wallscanner pinpoints the precise midpoint
of the metal object.
Fig. 6
Operation
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