Distance And Spot Size - RayTek Thermalert GP Series Operator's Manual

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The electronics enclosure is designed to operate in ambient temperatures of 0
to 50°C (32 to 120°F). Operation of these units outside of specified ambient
temperatures is not recommended, and accuracy cannot be guaranteed.
B.7.1.2

Distance and Spot Size

The desired spot size to be measured on the target will determine the mini-
mum and maximum working distance and the appropriate focus model. The
target must contain the entire sensor field of view. The sensor must be posi-
tioned so the field of view is the same as or smaller than the desired target
size. Figure B-25 illustrates proper sensor placement (applies to all models).
Best
Sensor
Target greater
than spot size
Target equal
to spot size
Figure B-25: Proper Sensor Placement
58 Thermalert GP Series Operator's Manual
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15
10 20
5 25
0 30
Good Incorrect
Target smaller
than spot size
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