Bosch GIS 1000 C Professional Original Instructions Manual page 25

To switch off the measuring tool, press the On/Off button.
The measuring tool saves the current operating mode and the
settings and then switches off. Put the protective cap 21 back
on the reception lens 23 and the protective cap 19 on the hu-
midity and ambient temperature sensor 5.
Do not switch off the measuring tool by removing the battery
pack or battery adapter because this may damage the internal
memory in certain cases.
In the "Shutdown Time" menu you can set whether and after
which time interval the measuring tool will automatically
switch off if no button press/measurement occurs (see "Shut-
down Time", page 30). The current operating mode and the
settings are also saved when the tool switches off automati-
cally.
If the battery or the measuring tool is not within the operating
temperature range stated in the Technical Data, the measur-
ing tool will shut down automatically after a brief warning (see
"Troubleshooting – Causes and Corrective Measures",
page 31). Allow the measuring tool to reach to the correct
temperature and then switch it back on.
To save energy, only switch the measuring tool on when you
are using it.
Setting the Zoom Level
For ongoing measurements and when rendering saved
screenshots, the image detail on the display can be shown in
three different zoom levels: 0.5 m, 2 m and 5 m.
The zoom levels are optimised for the corresponding distance
between measuring tool and measuring object: at a measur-
ing distance of 2 m, the zoom level "2 m" renders the (typical-
ly) best image detail.
The current zoom level appears in the indicator e. Press the
upward arrow button 16 to increase the zoom level, and the
downward arrow button 13 to reduce it.
Illuminating the Measuring Surface
When measuring in dark areas, you can switch on the light 24
to improve the display of the screen content. This can help
you to achieve a better result when saving screenshots.
Press the button 14 to switch the light 24 on or off.
To save energy, the light switches off automatically when the
brightness of the display lighting is reduced. You can change
this lighting time in the "Light Duration" menu (see "Light
Duration", page 30). The light is not automatically switched
on when the display lighting is switched back on.
For energy-saving reasons, the light is not available when the
charging state of the battery is in the critical range.
Bosch Power Tools
Preparing for Measurement
Setting the Emissivity Degree for Surface-temperature
Measurements
To determine the surface temperature, the natural infrared
heat radiation emitted by the object is measured contact-
free. For correct measurements, the emissivity degree set on
the measuring tool (see "Emissivity Degree", page 31) must
be checked and if required, adapted to the object being meas-
ured prior to each measurement.
To change the set emissivity degree, open the "Main Menu"
(see "Navigating the "Main Menu"", page 30).
– A selection of saved emissivity degrees is available for
some of the most common materials. Select the appropri-
ate material in the "Material" menu item. The correspond-
ing emissivity degree  is shown in the line beneath.
– If you know the exact emissivity degree of your measuring
object, you can also set it as a numerical value in the "Emis-
sivity Degree" menu item.
Inform yourself of the emissivity degree of your material. In
addition to the materials stored in the measuring tool, you will
find more in the table below.
Material
Aluminium, polished
Aluminium, oxidised
Brass
Brass, oxidised
Iron, polished
Iron, slightly rusted
Iron, galvanised
Chrome, polished
Roofing felt
Glass
 Correct surface-temperature indications are only pos-
sible when the set emissivity degree and the emissivity
degree of the object correspond. Correct notes on ther-
mal bridges and the risk of mould thus also depend on the
set emissivity degree.
If multiple objects made of a different material or having a dif-
ferent structure are measured during a measurement, the sur-
face temperature indication is only binding for the objects
matching the set emissivity degree.
English | 25
Emissivity degree
0.04
0.25
0.04
0.61
0.20
0.65
0.25
0.07
0.90
0.88
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