Minimum Resolvable Temperature Difference (MRTD) Testing: Equipment Specification For Building Performance Diagnostics

G. B. McIntosh; A. F. Filippone

doi:10.1117/12.932888

12 March 1982 Minimum Resolvable Temperature Difference (MRTD) Testing: Equipment Specification For Building Performance Diagnostics

G. B. McIntosh, A. F. Filippone

Author Affiliations +

Proceedings Volume 0313, Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes; (1982) https://doi.org/10.1117/12.932888
Event: Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes, 1981, Ottawa, Canada

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.

Citation Download Citation

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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