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English | 23
Switching on/off
The following options are available for switching on the measuring tool:
– Switch on the measuring tool using the on/off button(9). After a brief start-up se-
quence, the measuring tool is ready to use with the unit of measurement that was
saved when the tool was last switched off. No measurement is initiated at this stage
and the laser is still switched off.
– Switch on the measuring tool using the measuring button(3). After briefly pressing
the measuring button(3), the measuring tool will be ready to take measurements
following a brief start-up sequence. If you press and hold the measuring button(3)
for more than three seconds, the laser will be switched on after the start-up sequence
and the measuring tool will immediately begin measuring with the last saved unit of
measurement.
u Never leave the measuring tool unattended when switched on, and ensure the
measuring tool is switched off after use. Others may be dazzled by the laser beam.
u Do not direct the laser beam at persons or animals and do not stare into the laser
beam yourself (even from a distance).
To switch off the measuring tool, press the on/off button(9).
If no button on the measuring tool is pressed for approx. 1 minutes, the measuring tool
will automatically switch off to preserve battery life.
Measurement preparations
Setting the unit of measurement
The default unit of measurement is degrees Celsius (°C). You can switch between the de-
grees Celsius and degrees Fahrenheit units of measurement by pressing and holding the
button Mode(8) for more than threeseconds.
If the measuring tool is switched on and the unit of measurement is changed, the last set
of measured values will be erased. The unit of measurement is saved and displayed when
you switch on the measuring tool again.
Adjusting the emissivity
To determine the surface temperature, the tool performs a contactless measurement of
the natural infrared thermal radiation emitted by the object at which the tool is aimed.
For optimum measuring results, the emissivity setting (see "Emissivity", page26) on
the measuring tool must be checked before every measurement and adapted to the ob-
ject being measured if necessary.
When the measuring tool is switched on, the high emissivity setting is activated by de-
fault. If the emissivity is changed, the last set of measured values will be erased.
Bosch Power Tools 1 609 92A 4RK | (06.03.2019)
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