Bosch Professional GIS 500 Original Instructions Manual page 11

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). The measuring tool will be
ready to use again following a brief start-up sequence. 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.
Never leave the measuring tool unattended when switched on, and ensure the
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measuring tool is switched off after use. Others may be dazzled by the laser beam.
Do not direct the laser beam at persons or animals and do not stare into the laser
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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
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", page 14) 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 for the first time, the high emissivity setting is
activated by default. If the emissivity is changed, all the measured values will be erased.
The emissivity setting remains saved when the measuring tool is switched off.
You can select from three different emissivity settings on the measuring tool. The follow-
ing overview shows commonly used materials of a similar emissivity for each emissivity
setting; note that these are examples and not an exhaustive list. Because the emissivity
of a material is dependent on a variety of factors and is therefore variable, the details in
the following overview serve only as guide values.
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