Reflected Temperature Compensation
Correction feature used to achieve greater accuracy when, due to a high uniform background temperature, IR energy is reflected off the target into the instrument. If the background temperature is known the instrument reading can be corrected by using this feature. Targets that have low emissivities will reflect energy from nearby objects, which may result is inaccurate readings. Sometimes objects near the target (machines, furnaces, or other heat sources) have a temperature much higher than that of the target. In these situations it is necessary to compensate for the reflected energy from those objects. (RTC has no effect if the emissivity is 1.0.)
Relative Humidity
The ratio, expressed as a percent, of the amount of water vapor actually present in a sample of air to the greatest amount of water vapor possible at the same temperature.
Repeatability
The degree to which a single instrument gives the same reading on the same object over successive measures under the same ambient and target conditions (per the ASTM standard test method E
Resolution
See Temperature Resolution or Optical Resolution.
Response Time
A measure of an instrument’s change of
Scatter
See Size of Source Effect.
Size of Source Effect
An undesirable increase in temperature reading caused by IR energy outside the spot reaching the detector. The effect is most pronounced when the target is much larger than the field of view.
July 1, 2003 | - 81 - | Version 1.0 |
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