RayTek ThermoView Ti30 - Manual (Page 82)

Spectral Response
The wavelength region in which the IR Thermometer is sensitive.
Spot
The diameter of the area on the target where the temperature determination is made. The
spot is defined by the circular aperture at the target that allows typically 90% of the IR
energy to be collected by the instrument, as compared with the 100% spot diameter which is
defined by the IR energy collected from a very large target. The actual size and distance to
the target for the 100% spot diameter is specified in the calibration procedure for each
instrument.
Stare
A saturation effect caused by aiming a sensor at a hot target for an extended period of time
and then quickly aiming at a target at a lower temperature. The increase in time (beyond the
normal system response) for the sensor to return to within 5 % of the lower temperature is
defined as the stare time.
Storage Temperature Range
Ambient temperature range that the thermometer can safely withstand in a non-operating
mode, and subsequently, operate with-in published performance specifications.
Target
The object upon which the temperature determination is being made.
Temperature
A degree of hotness or coldness of an object measurable by a specific scale; where heat is
defined as thermal energy in transit, and flows from objects of higher temperature to objects
of lower temperature.
Temperature Coefficient (or Ambient Derating)
An indication of the instruments ability to maintain accuracy when the ambient conditions
are subject to a slow change or drift. The temperature coefficient is usually expressed as the
percent change in accuracy per degree change in ambient temperature. For a rapid change in
ambient conditions refer to Thermal Shock.
July 1, 2003 - 82 - Version 1.0
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