6 Using the product
66
6.3. Measuring
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Important framework conditions
Please observe the following framework conditions in order to
obtain significant measurement results.
Humidity measurement:
• Pivot the separate humidity measuring instrument or optional
radio humidity probe slightly to shorten the adjustment time.
Avoid sources of interference (e.g. exhaled air).
Building thermography, investigating the building shell:
• Considerable temperature difference between inside and
outside required (ideal: >15°C / >27°F).
• Consistent weather conditions, no intensive sunlight, no
precipitation, no strong wind.
To ensure maximum accuracy, the imager requires an adjustment
time of 10 minutes after it is switched on.
Important settings
Before recording an image, check whether the protection glass
option is set correctly to prevent corruption of the measurement
results, see Optics, page 61.
Before saving an image, make sure that it is correctly focussed,
manually (see Manually focusing the image, page 31) or
automatically (see Automatically focusing the image, page 31).
Images that are not in focus cannot be corrected retroactively!
To obtain precise measurement values, the emissivity and reflected
temperature must be set correctly, see Emissivity, page 43.
Subsequent adjustment is possible via the PC software, if required.
When humidity is high or the imager is a considerable distance
from the object to be measured, atmospheric correction increases
measurement accuracy, see Atmospheric correction, page 41.
When auto-scaling is activated, the colour scale is continuously
adjusted to the min.-/max.- values of the current measurement
image. This means that the colour assigned to a specific
temperature is changing constantly! To be able to compare multiple
images based on the assigned colour, scaling must be set
manually to fixed values (see Scale manual, page 45), or must be
subsequently adjusted to uniform values using the PC software.
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