Bosch Truvo Manual Original página 23

Searching for Metal Objects
Preparing to take measurements and features of the measuring process:
– Remove any metal objects, such as rings, watches and other jewellery
from the vicinity of the measuring tool to prevent interference with the
measurement results.
– The proximity of metal objects such as door frames and radiators can im-
pede the search for other metal objects beneath the surface. This also ap-
plies to aluminium foil covering heating pipes or insulation, which is re-
cognised as metal and indicated over large areas.
When approaching a metal object, the light-up ring (5) first lights up yellow
and then changes to red. The metal object indicator (4) will light up and an
acoustic signal is emitted.
Even when the light-up ring is yellow, there may be a metal object be-
u
neath the sensor area. Small or deep-lying metal objects are near the
sensor, or the nature of the wall affects the measuring result.
Searching for Live Cables
The measuring tool displays single-phase live cables (110−240 V,
50−60 Hz). Other cables (multi-phase electricity cables, DC, higher/lower
frequency or voltage) as well as non-live cables cannot be reliably detected,
but they may be displayed as metal objects.
Preparing to take measurements and features of the measuring process:
– The cable must be live. You should therefore connect electricity con-
sumers (e.g. lights, appliances) to the electricity cable you are trying to
find. Switch on the electricity consumers to ensure that the electricity
cable is live.
– The 50–60 Hz signal from the electricity cable must be able to reach
the measuring tool. If the cable is in damp walls (e.g. due to high humid-
ity), behind metallic foils (e.g. from thermal insulation) or in an empty
metal pipe, the signal will not reach the measuring tool and you will not be
able to find the cable.
If the light-up ring (5) lights up yellow or red over a larger area, then the
material is electrically shielded and the search for live cables is not reli-
able.
– The measuring tool must be sufficiently earthed. To do this, hold it
firmly (without gloves) by the gripping surface (1). Make sure that you
are in good contact with the floor. Insulating shoes, ladders or platforms
Bosch Power Tools
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1 609 92A 8B4 | (02.03.2023)