Starting Operation - Bosch GMS 120 Professional Manual Original

formation sources (e.g. construction plans) before drilling, sawing or routing into
walls, ceilings or floors.
Hold the measuring tool by the intended gripping surface (8) only, so as not to
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influence the measurement.
Do not attach any stickers or labels to the sensor area (13) on the rear of the
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measuring tool. Metal labels in particular will affect measuring results.
Do not wear gloves when taking measurements and make sure
that you are properly earthed. If you are not properly earthed, the
identification of live wires may be impaired.
When taking measurements, avoid devices that emit strong elec-
tric, magnetic or electromagnetic fields. If possible, deactivate all
tools whose radiation could interfere with the measurement and
switch off the corresponding functions or tools.

Starting Operation

Switching on/off
Before switching on the measuring tool, ensure that the sensor area (13) is dry.
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If necessary, use a cloth to dry the measuring tool.
If the measuring tool has been exposed to a significant change in temperature,
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leave it to adjust to the ambient temperature before switching it on.
To switch on the measuring tool, press the on/off button (5).
To switch off the measuring tool, press the on/off button (5) again.
If no button on the measuring tool is pressed for approx. 5 mins, and no objects are de-
tected, the measuring tool will automatically switch itself off to preserve battery life.
Switching the display illumination on and off
The display illumination can be switched on or off with the display illumination
button (6).
Switching audio signal on/off
The audio signal can be switched on/off with the audio signal button (7). When the audio
signal is switched off, the audio signal indicator (a) appears on the display.
Bosch Power Tools
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1 609 92A 5DB | (23.02.2021)