FLIR B6 series, User Manual

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16.6 Changing object parameters
General For accurate measurements, you must set the object parameters. You can do this
locally or globally. This procedure describes how to change the object parameters
globally.
Types of
parameters
The camera can use these object parameters:
Emissivity , i.e., how much radiation an object emits, compared to the radiation
of a theoretical reference object of the same temperature (called a “blackbody”).
The opposite of emissivity is reflectivity. The emissivity determines how much of
the radiation originates from the object as opposed to being reflected by it.
■
■
Reflected apparent temperature , which is used when compensating for the radi-
ation from the surroundings reflected by the object into the camera. This property
of the object is called reflectivity.
■
Object distance , i.e., the distance between the camera and the object of interest.
■
Atmospheric temperature , i.e., the temperature of the air between the camera
and the object of interest.
■
Relative humidity , i.e., the relative humidity of the air between the camera and
the object of interest.
■
External optics temperature , i.e., the temperature of any protective windows etc.
that are set up between the camera and the object of interest. If no protective
window or protective shield is used, this value is irrelevant.
■
External optics transmission , i.e., the optical transmission of any protective win-
dows, etc. that are set up between the camera and the object of interest.
Recommended
values If you are unsure about the values, the following values are recommended:
Atmospheric temperature +20°C (+69°F)
1.0 m (3.3 ft.) Distance
0.95 Emissivity
+20°C (+69°F) Reflected apparent temperature
50% Relative humidity
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Publ. No. 1558550 Rev. a557 – ENGLISH (EN) – October 7, 2011
16 – Working with measurement tools