Historical
ANSI/ASHRAE 41.1-1986 (RA 2006)
Standard Method for Temperature Measurement
Sets forth recommended practices for temperature measurements and provides adequate and consistent measurement procedures for reference in other standards. Procedures described are intended for use in heating, refrigerating and air-conditioning equipment and components. Dual units of measurement.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]