Bosch GTC 400 C Professional Originalbetriebsanleitung Seite 22

22 | English
real image in grey scale to prevent coloured objects from
being wrongly associated with temperatures (e.g. a blue
window frame when searching for faulty insulation). Ad-
just the scale using the up arrow button (5) and down ar-
row button (10). This expands or reduces the temperat-
ure range, thereby expanding or reducing the thermal im-
age. The measuring tool continues to measure minimum
and maximum temperatures and displays these at the
ends of the scale (g).
– <Manual>
If greatly deviating temperatures are measured in the
thermal image (e.g. a radiator as a hot object when
searching for thermal bridges), the available colours are
distributed among a large number of temperature values
in the range between the maximum and the minimum
temperature. This can result in a situation where subtle
temperature differences can no longer be shown in detail.
To obtain a detailed depiction of the temperature range to
be examined, take the following steps: After switching
to <Manual> mode, you can set the maximum and the
minimum temperature. Doing this enables you to set the
temperature range that is relevant to you and in which
you would like to detect subtle differences. The <Reset
scale> setting automatically readjusts the scale to the
measured values in the infrared sensor's field of view.
Main Menu
To access the main menu, first press the Func (6) button to
call up the measuring functions. Now press the right-hand
function button (7).
– <Measurement>
▪ <Emissivity> (c)
A selection of saved emissivities is available for some
of the most common materials. Select the relevant ma-
terial in the <Material> menu item. The corresponding
emissivity is shown in the line beneath. If you know the
exact emissivity of the object you want to measure,
you can also set it as a numerical value in the
<Emissivity> menu item.
▪ <Reflected temp.> (b)
Setting this parameter can improve the accuracy of the
measuring result, especially with low-emissivity
(= high-reflection) materials. In some situations (espe-
cially in indoor areas) the reflected temperature cor-
responds to the ambient temperature. If there are ob-
jects with greatly deviating temperatures close to
highly reflective objects, this value should be adjusted
as the measurement may be affected.
– <Display>
▪ <Centerspot> (k)
The point is displayed in the centre of the thermal im-
age and shows you the measured temperature value at
this point.
▪ <Hotspot> (j): <ON>/<OFF>
The hottest point (= measuring pixel) is indicated by
red crosshairs in the thermal image. This facilitates the
search for critical areas (e.g. a loose contact terminal
in the control cabinet).
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▪ <Coldspot> (l): <ON>/<OFF>
The coldest point (= measuring pixel) is indicated by
blue crosshairs in the thermal image. This facilitates
the search for critical areas (e.g. a leak in a window).
▪ <Color scale> (g): <ON>/<OFF>
– <WiFi> (d): <ON>/<OFF>
(see "Data Transfer", page 23)
– <Tool>
▪ <Language>
Under this menu item, you can select the language
used in the display.
▪ <Time & Date> (a)
To change the time and date shown in the measuring
tool, call up the <Time & Date> submenu. This sub-
menu not only allows you to set the time and date but
also to change their respective formats. To exit the
<Time> and <Date> submenu, press either the right-
hand function button (7) to save the settings, or the
left-hand function button (13) to discard the changes.
▪ <Audio Signals>: <ON>/<OFF>
Under this menu item, you can switch the audio signals
on or off.
▪ <Shutdown Time>
Under this menu item, you can select the time interval
after which the measuring tool will automatically
switch off if no buttons are pressed. You can also deac-
tivate automatic switch-off by selecting the <Never>
setting.
▪ <Delete All Images>
Under this menu item, you can delete all the files in the
internal memory at once. Press the right-hand arrow
button (8) for <More> to enter this submenu. Then
press either the left-hand function button (13) to de-
lete all files, or the right-hand function button (7) to
cancel.
▪ <Tool Information>
Under this menu item, you can access information
about the measuring tool. There you will find the serial
number of the measuring tool and the installed soft-
ware version.
You can also press the measuring button (17) to exit any
menu and return to the home screen.
Documenting Measurements
Saving Measurements
The measuring tool begins to take measurements as soon as
it is switched on and does so continuously until it is switched
off.
To save an image, point the camera at the required measur-
ing object and press the "Save" button (11). The image is
saved in the internal memory of the measuring tool. Alternat-
ively, press the measuring button (17) (pause). The meas-
urement is frozen and shown in the display. This enables you
to carefully view the image and to make retrospective adjust-
ments (e.g. to the colour palette). If you do not wish to save
the frozen image, restart measuring mode by pressing the
measuring button (17). If you wish to save the image in the
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