Measuring Functions - Bosch GTC 400 C Professional Originalbetriebsanleitung

Assigning Temperatures on the Basis of the Scale
A scale (g) is shown on the right-hand side of the
display. The values at the top and bottom end are
oriented to the maximum (f) and minimum (h)
temperature recorded in the thermal image. For
the scale, 99.8 % of the total pixels are evalu-
ated. Colours are assigned to temperature values
with a uniform distribution in the image (lin-
early).
Different shades can therefore be used to assign
temperatures within these two limit values. For
example, a temperature that is exactly between
the maximum and minimum value is assigned to
the centre colour range of the scale.
To determine the temperature of a specific area, move the
measuring tool so that the crosshairs with temperature
display (k) are aimed at the required point or area. In the
automatic setting, the colour spectrum of the scale is always
distributed linearly (= uniformly) across the entire measur-
ing range between the maximum and minimum temperat-
ures.
The measuring tool displays all measured temperatures in
the measuring range in relation to one another. If heat is dis-
played as blue in the colour palette in an area, for example in
a colour representation, this means that the blue areas are
among the colder measured values in the current measuring
range. However, these areas may still be in a temperature
range which could cause injuries in certain circumstances.
You should therefore always note the temperatures dis-
played on the scale or at the crosshairs themselves.
Functions
Adjusting the Colour Display
Depending on the measurement conditions, different colour
palettes may make it easier to analyse the thermal image and
display objects or circumstances more clearly in the display.
This does not affect the measured temperatures. The only
change is the way in which the temperature values are dis-
played.
To change the colour palette, remain in measuring mode and
press the right-hand (8) or left-hand (12) arrow button.
Superimposition of Thermal Image and Real
Image
For improved orientation (= local assignment of the thermal
image displayed), with matched temperature ranges, a real
visual image can additionally be inserted.
Note: The superimposition of the real image and thermal im-
age corresponds exactly at a distance of 0.55 m. If the tool is
closer to or further away from the object being measured,
this fundamentally results in misalignment of the real image
and thermal image. This misalignment can be compensated
for with the GTC Transfer Software.
Bosch Power Tools
The measuring tool camera offers you the following options:
– Complete infrared image
Only the thermal image is displayed.
– Picture-in-picture
The thermal image displayed is cropped and the sur-
rounding area is shown as a real image. This setting im-
proves the local assignment of the measuring range.
– Transparency
The thermal image displayed is placed on top of the real
image in such a way that it is transparent. This enables
improved detection of objects.
You can select the setting by pressing the up (5) or
down (10) arrow buttons.
Fixing the Scale
The colour distribution in the thermal image is adjusted auto-
matically but can be fixed by pressing the right-hand func-
tion button (7). This enables a comparison to be made
between thermal images taken under different temperature
conditions (e.g. when checking several rooms for thermal
bridges). It also allows an extremely cold or hot object to be
hidden in the thermal image. This object would otherwise
distort the image (e.g. a radiator as a hot object when
searching for thermal bridges).
To switch the scale back to automatic, press the right-hand
function button (7) again. The temperatures are now dy-
namic again and adapt to the measured minimum and max-
imum values.

Measuring Functions

To call up further functions that may be helpful for the dis-
play, press the Func (6) button. Use the left-hand arrow
button (12) or the right-hand arrow button (8) to navigate
through the displayed options to select a function. Select a
function and press the Func (6) button again.
The following measuring functions are available:
– <Automatic>
Colours are distributed automatically in the thermal im-
age.
– <Heat detector>
Only the warmer temperatures in the measuring range are
displayed as a thermal image in this measuring function.
The area outside these warmer temperatures is shown as
a real image in grey scale. The depiction in grey scale pre-
vents coloured objects from being wrongly associated
with temperatures (e.g. a red cable in the control cabinet
when searching for overheated components). Adjust the
scale using the up arrow button (5) and down arrow
button (10). This expands or reduces the temperature
range, thereby expanding or reducing the thermal image.
The measuring tool continues to measure minimum and
maximum temperatures and displays these at the ends of
the scale (g).
– <Cold detector>
Only the colder temperatures in the measuring range are
displayed as a thermal image in this measuring function.
The area outside these colder temperatures is shown as a
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