Bosch GTC 12V-450 Professional handleiding

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English | 23

ences can be used as an indication of temperature relation-

ships.

Information about the Measuring Conditions

Highly reflective or shiny surfaces (e.g. shiny tiles or pol-

ished metals) may significantly distort or impair the results

shown. If necessary, mask the measuring surface with a

dark, matt adhesive tape that conducts heat well. Allow the

tape to briefly reach the correct temperature on the surface.

Make sure that a favourable measuring angle is used on re-

flective surfaces in order to ensure that the thermal radiation

reflected by other objects does not distort the result. For ex-

ample, the reflection of your own emitted body heat may in-

terfere with the measurement when measuring head-on from

a perpendicular position. On a level surface, the outline and

temperature of your body could therefore be displayed (re-

flected value), and these values do not correspond to the ac-

tual 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.

Consequently, the more suitable and stable the measuring

conditions are, the more accurate and reliable the measure-

ment readings are. Not only do significant fluctuations in the

temperature of the environmental conditions have an im-

pact, the accuracy can also be impaired by significant fluctu-

ations in the temperatures of the object being measured.

Infrared temperature measurement is impaired by smoke,

steam/high humidity or dusty air.

Information for achieving improved measurement accuracy:

– Move as close as possible to the object to be measured to

minimise 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. Once

ventilated, allow the room to reacclimatise until it returns

to the usual temperature.

Marking the Measuring Point

u Do not direct the laser beam at persons or animals and

do not stare into the laser beam yourself (even from a

distance).

The measuring tool is equipped with a laser for marking the

measuring point.

Press and hold down the laser button(13). The laser

symbol(f) is displayed in the statusbar and a red circle ap-

pears around the crosshairs(m). The superimposition of the

laser and crosshairs corresponds exactly at a distance of

1m. If you release the laser button(13), the laser switches

off.

Assigning Temperatures on the Basis of the Scale

A scale(i) is shown on the right-hand side of the

display. The values at the top and bottom end are

oriented to the maximum(h) and minimum(j)

temperature recorded in the thermal image. For

the scale, 99.99% 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(m) 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

Observe the information on navigating the various menus

(see "Navigating in the Various Menus", page22)

Illuminating the Object Being Measured

The measuring tool is equipped with a worklight(4). It is in-

tended to illuminate the direct work area of the measuring

tool in order to take pictures and is not intended as a con-

tinuous work light.

To switch on/off the worklight, open the left side bar. Scroll

to the <LED on>/<LED off> menu item and confirm your se-

lection. When the worklight is switched on, this is indicated

in the statusbar.

The light is automatically switched off after 2minutes to

avoid affecting the measuring accuracy.

You can change the automatic switch-off time in the menu

under <Tool settings>.

Bosch Power Tools 1 609 92A 9ZG | (14.01.2025)

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