RayTek RAYCMLTJM Operating Instructions Manual

RayTek RAYCMLTJM Operating Instructions Manual Manual pdf 16 page image

BasicsCM Rev. B 06/2011 164.2 Distance and Spot SizeThe desired spot size on the target will determine the maximummeasurement distance and the necessary focus length of the optical module.To avoid erroneous readings the target spot size must contain the entire fieldof view of the sensor. Consequently, the sensor must be positioned so thefield of view is the same as or smaller than the desired target size.Figure 2: Proper Sensor Placement4.3 Ambient TemperatureThe sensing head should work under ambient operating range in accordanceto section 3.1 Parameters, page 11.4.4 Atmospheric QualityIn order to prevent damage to the lens and erroneous readings, the lensshould always be protected from dust, smoke, fumes, and other conta-minants. For this purpose an air purge collar is available. You should only useoil free, clean “instrument“ air.Target greater than spot sizeTarget equal to spot sizeTarget smaller than spot sizeBest Good IncorrectBackground