Support User Manuals

RayTek FR Thermometer User Manual

Open as PDF

of 67

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.

Tar

g

et

g

reater than spot size

Tar

g

et equal to spot size

Tar

g

et smaller than spot size

best good incorrect

previous next