User manual

SensorLocation
14 MarathonSeriesFA/FR
4.5SensorPlacement(1‐ColorMode)
Optical head placement for one‐color temperature measurements is more critical than two‐color
measurements.Thesensormusthaveaclearviewofthetarget.Therecanbenoobstructionsonthe
lens, window, or in the atmosphere. The distance from the target can be anywhere beyond the
minimumrequirements,as
longasthetargetcompletelyfillsthefieldofview.Thefollowingfigure
illustratesproperplacementwhenusingtheone‐colormode.

Figure10:ProperSensorPlacementin1‐ColorMode
4.6SensorPlacement(2‐ColorMode)
Thefollowingfigure showsheadplacementunder  variousconditions where two‐color temperature
measurements can be taken. Note, however, that if the sensor signal is reduced more than 95%
(includingemissivityandobscurationofthetarget),thesensoraccuracyalsodegrades.
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