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12 March 1982 Minimum Resolvable Temperature Difference (MRTD) Testing: Equipment Specification For Building Performance Diagnostics
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Abstract
Thermographic scanning has been a viable tool for investigating building envelope deficiencies for over ten years. One of the basic assumptions has been that a minimum temperature difference must exist between interior and exterior air before an inspection can be considered. It has also been assumed that the greater the air-to-air temperature difference (i.e., the greater the heat flow), the more accurate the inspection. However, for building exterior scanning, as ambient exterior temperature decreases, instrument sensitivity decreases at a rate faster than heat flow increases. In the past, manufacturers' specifications have been neither adequate nor standardized in respect to instrument sensitivity fall-off and instrument comparisons. Minimum resolvable temperature difference (MRTD) testing underway at Public Works Canada is helping to solve this problem.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. B. McIntosh and A. F. Filippone "Minimum Resolvable Temperature Difference (MRTD) Testing: Equipment Specification For Building Performance Diagnostics", Proc. SPIE 0313, Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes, (12 March 1982); https://doi.org/10.1117/12.932888
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