Bosch GTC 400 C Professional Orginal-Betriebsanleitung Seite 20

OBJ_BUCH-3136-002.book Page 20 Monday, July 24, 2017 12:07 PM
20 | English
Assigning temperatures on the basis of the scale
A scale is shown on the right-hand side of the dis-
play. The values at the top and bottom end are ori-
ented to the maximum and minimum temperature
recorded in the thermal image. Colours are as-
signed to temperature values with a uniform distri-
bution in the image (linearly).
Different shades can therefore be used to assign
temperatures within these two limit values. For ex-
ample, a temperature that is exactly between the
maximum and minimum value can be 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 l are aimed at the re-
quired point or area.
In the automatic setting, the colour spectrum of
the scale is always distributed linearly (= uniform-
ly) across the entire measurement range between
the maximum and minimum temperatures.
The thermal imaging camera displays all measured tempera-
tures in the measurement range in relation to one another. If
heat is displayed 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
measurement range. However, these areas may be in a tem-
perature range that could cause injuries in certain circum-
stances. You should therefore always note the temperatures
displayed on the scale or at the crosshairs themselves.
Functions
Adjusting the colour display
Depending on the measurement conditions, different colour
palettes can make it easier to analyse the thermal image and
show objects or circumstances more clearly in the display.
This does not affect the measured temperatures. Only the
way in which the temperature values are shown changes.
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 visual
real image can additionally be inserted.
Note: The superimposition of the real image and thermal im-
age is accurate at a distance of 0.55 m. If the tool is closer to
or further away from the object being measured, this may re-
sult in misalignment of the real image and thermal image.
The thermal imaging camera offers you the following options:
– Complete infrared image
Only the thermal image is displayed.
– Image in image
The thermal image displayed is cropped and the surround-
ing area is shown as a real image. This setting improves the
local assignment of the measurement range.
1 609 92A 3RD | (24.7.17)
– Transparency
The thermal image displayed is placed on top of the real
image in such a way that it is slightly transparent. This ena-
bles improved detection of objects.
32,5 °C
You can adjust 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 function
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).
To switch the scale back to automatic, press the right-hand
function button 7 again. The temperatures are now dynamic
again and adapt to the measured minimum and maximum
21,8 °C
values.
Measuring functions
To call up further functions which may be helpful for the dis-
play, press the "Func" button 6. Use the right-hand/left-hand
buttons to navigate through the displayed options to select a
function. Select a function and press the "Func" button 6
again.
The following measuring functions are available:
– "Automatic"
Colours are distributed automatically in the thermal image
– "Heat detector"
Only the warmer temperatures in the measurement range
are displayed as a thermal image in this measuring function.
The area outside these warmer temperatures is displayed in
greyscale as a real image so that coloured objects are not
wrongly associated with temperatures (e.g. red cable in the
control cabinet when looking for overheated components).
Adjust the scale using the up 5 and down 10 buttons. This
expands or reduces the temperature range shown.
The tool continues to measure minimum and maximum
temperatures and displays these at the ends of the scale.
You can, however, control which temperature range is
shown in colour as a thermal image.
– "Cold detector"
Only the colder temperatures in the measurement range
are displayed as a thermal image in this measuring func-
tion. The area outside these colder temperatures is dis-
played in greyscale as a real image so that coloured objects
are not wrongly associated with temperatures (e.g. blue
window frame when looking for faulty insulation). Adjust
the scale using the up 5 and down 10 buttons. This ex-
pands or reduces the temperature range shown.
The tool continues to measure minimum and maximum
temperatures and displays these at the ends of the scale.
You can, however, control which temperature range is
shown in colour as a thermal image.
– "Manual"
If greatly deviating temperatures are measured in the ther-
mal image (e.g. 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.
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