Transport i bezpieczeństwo · 13/08/1997

Highway Safety Programs; Model Specifications for Calibrating Units for Breath Alcohol Testers; Conforming Products List of Calibrating Units

This notice amends the Model Specifications for Calibrating Units for Breath Alcohol Testers by incorporating an alternative testing procedure using National Institute for Standards and Technology (NIST) Reference Gas Mixtures (RGMs) for the evaluation of dry gaseous ethanol calibrating devices and making other changes that were previously proposed to simplify the Model Specifications and to make them easier to read. This notice also proposes and seeks comment on a new alternate procedure for evaluating the accuracy of both wet bath and dry gas breath alcohol calibrating units using infra-red spectroscopy. Published with this notice is an amended Conforming Products List (CPL) of calibrating units that meet the Model Specifications. This amended list includes five new listings, one wet bath unit and four dry gas units.