PeakTech 5400, Руководство по эксплуатации

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5. Measurement method
The PeakTech 5400 has three internal sensors for infrared- temperature
(IR), air temperature (AT) and relative humidity (RH%).
*
The dew point (DP) is calculated from the ratio of the surface
temperature (IR) and relative humidity (RH%).
5.1. IR Distance to Spot size
D:
Distance
S: Spot size
The
“Distance to Spot size” is the ratio of the distance from the
measured object to the size of the measuring surface is referred to.
The further away you are from the target during the infrared
measurement, the bigger the Spot size will be. This can cause a
situation where not only the desired object, but also environmental
factors are measured which can cause bad measurement results.
The higher the optical resolution (distance to spot size) is, the more
accurately can be measured at greater distances.
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