Bosch GTC 400 C Professional Original Instructions Manual page 10

gtc400c_BUCH-3220-004.book Seite 10 Mittwoch, 9. Mai 2018 9:19 09
10 | English
(with different emissivity levels), the displayed colour differ-
ences can be used as an indication of temperature relation-
ships.
Material
(reference value 0 °Cto100 °C)
Concrete
Plaster/mortar
Roofing tiles
Roofing felt
Radiator paint
Wood
Linoleum
Paper
Notes on the Measuring Conditions
Highly reflective or shiny surfaces (e.g. shiny tiles or polished
metals) may distort or impair the results shown. If necessary,
mask the surface to be measured with a dark, matt adhesive
tape that conducts heat well. Allow the tape to acclimatise
briefly on the surface.
Make sure that a favourable measuring angle is used on reflec-
tive surfaces in order to ensure that the thermal radiation re-
flected by other objects does not distort the result. For exam-
ple, the reflection of your own body heat may interfere with
the measurement when measuring head-on from a perpendic-
ular position. On a level surface, the outline and temperature
of your body could therefore be displayed (reflected value),
and these values do not correspond to the actual temperature
of the measured surface (emitted value or real value of the
surface).
Measuring through transparent materials (e.g. glass or trans-
parent plastics) is fundamentally not possible.
The accuracy and reliability of the measuring results increase
with better and more stable measuring conditions.
Infrared temperature measurement is impaired by smoke,
vapour/high air humidity or dusty air.
Information for achieving improved measurement accuracy:
– Get as close as possible to the measuring object to mini-
mise interfering factors between you and the surface to be
measured.
– Ventilate indoor areas prior to measurement, especially
when the air is contaminated or extremely steamy.
After ventilating, allow the room to acclimatize for a while
until the usual temperature has been reached again.
1 609 92A 4FJ | (9.5.18)
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
Emissivity
recorded in the thermal image. Colours are as-
signed to temperature values with a uniform distri-
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bution in the image (linearly).
Different shades can therefore be used to assign
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temperatures within these two limit values. For ex-
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ample, a temperature that is exactly between the
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maximum and minimum value can be assigned to
the centre colour range of the scale.
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To determine the temperature of a specific area,
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move the measuring tool so that the crosshairs
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with temperature display k are aimed at the re-
0.89 quired point or area.
In the automatic setting, the colour spectrum of
the scale is always distributed linearly (= uniformly) 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.
32,5 °C
21,8 °C
Bosch Power Tools