LIMIT 97 Manual Del Usuario página 7

English
12. Find heat and cold point
Aim the thermometer at target area and start to measure, then move up and down slowly to sweep the whole
area until the heat point and/or cold point are found.
D:S (Distance Coefficient)
Limit 97 have D:S of 12:1 which means that if an object is measured from a distance off 12m the instrument
will show the average value off 1m in diameter (shown below).
13. Visual field
Ensure that the target is larger than the diameter off the two laser spots. The smaller the target is, the closer is
the measurement distance. Suggested measurement distance should be so the diameter off the two laser spots
cover less than 75% of the testing area (shown below).
Emissivity
Emissivity characterization reflects the of material's radiated energy. Emissivity for most organic materials, paints or
oxidized surfaces are about 0.95. Total emissivity of selected metals and non-metals are listed in the following table.
4