90.5—Acronyms and abbreviations.
The following acronyms and abbreviations apply to part 90.
AECD—Auxiliary emission control device
ASME—American Society of Mechanical Engineers
ASTM—American Society for Testing and Materials
CAA—Clean Air Act
CAAA—Clean Air Act Amendments of 1990
CLD—chemiluminescent detector
CO—Carbon monoxide
CO2—Carbon dioxide
EPA—Environmental Protection Agency
FTP—Federal Test Procedure
g/kW-hr—grams per kilowatt hour
HC—hydrocarbons
HCLD—heated chemiluminescent detector
HFID—heated flame ionization detector
ICI—independent Commercial Importer
NDIR—non-dispersive infrared analyzer
NIST—National Institute for Standards and Testing
NO—Nitric oxide
NO2—Nitrogen dioxide
NOX—Oxides of nitrogen
O2—Oxygen
OEM—original equipment manufacturer
PMD—paramagnetic detector
SAE—Society of Automotive Engineers
SEA—Selective Enforcement Auditing
SI—spark-ignition
U.S.C.—United States Code
VOC—Volatile organic compounds
ZROD—zirconiumdioxide sensor