Hilti PT-C Manual De Instrucciones Original página 43

• Transparency
The displayed thermal image is superimposed as a transparent image on the real image. This makes
objects easier to identify.
You can select a setting by pressing the Up button or the Down button.
7.3 Fixing the scale
Color distribution in the thermal image is adapted automatically, but it can also be fixed by pressing the
Right function button. This enables comparability across thermal images imaged under differing temperature
conditions (e.g. for checking several rooms for heat bridges) or it can also be used to hide an extremely
cold or extremely hot object in the thermal image that would otherwise distort the image (e.g. radiator as hot
object in a search for heat bridges).
To reset the scale to automatic, press the Right function button again. The temperatures behave dynamically
again and adapt to the measured minimum and maximum values.
7.4 Measuring functions
To access other functions that can help you with the readings, press the Func button. Use the Left and Right
buttons to navigate through the displayed options in order to select a function. Select a function and press
the Func button again.
The following measuring functions are available to you:
• 'Automatic'
Color distribution in the thermal image is automatic.
'Heat Detector'
•
In this measuring function only the warmer temperatures in the measured area are shown as a thermal
image. The area outside these warmer temperatures is shown as a real image in grayscales. Depiction
in grayscales prevents colored objects from being incorrectly associated with temperatures (e.g. red-
colored cable in switchgear cabinet in a search for overheated components). Use the Up and Down
buttons to adjust the scale. This correspondingly extends or reduces the temperature range shown as
a thermal image. The measuring tool continues to measure minimum and maximum temperatures and
shows these readings at the corresponding ends of the scale.
• 'Cold Detector'
In this measuring function only the colder temperatures in the measured area are shown as a thermal
image. The area outside these colder temperatures is shown as a real image in grayscales to prevent
colored objects from being incorrectly associated with temperatures (e.g. blue-colored window frame in
a search for faulty insulation). Use the Up and Down buttons to adjust the scale. This correspondingly
extends or reduces the temperature range shown as a thermal image. The measuring tool continues to
measure minimum and maximum temperatures and shows these readings at the corresponding ends of
the scale.
'Manual'
•
If strongly varying temperatures are measured in the thermal image (e.g. a radiator as a hot object in
an examination to identify heat bridges), the colors available are distributed across a high number of
temperature values in the range between the maximum and minimum temperatures. This can lead to
a loss of detailed distinction over fine differences in temperature. To obtain a detailed visualization of
the temperature range being examined, proceed as follows: After switching to the 'Manual' mode, you
can set the maximum and minimum temperatures. In this way you can define the temperature range
that is relevant for you and within which you want to make fine distinctions. The 'Reset scale' setting
automatically resets the scale to the measured values in the infrared sensor's field of view.
7.5 Main menu
To access the main menu, first press the Func button to call up the measuring functions. Then press the
Right function button.
7.5.1 'Measurement'
'Emissivity'
•
Emissivities for some of the most common materials are saved in memory as presets. To make searching
easier, the values are arranged in groups in the emissivity catalog. In the 'Material' menu item, begin by
selecting the appropriate category and then select the appropriate material. The associated emissivity is
shown in the line below. If you know the exact emissivity of the object to be measured, you can enter it
as a numerical value in the 'Emissivity' menu item. If you measure the same material frequently, you can
save 5 emissivities as favorites and access them quickly in the topmost bar (numbered 1 to 5).
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