Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Procedures for Evaluating the Photopic Response of the Visible Emission Training School Transmissometer.
CORP Author PEDCo-Environmental, Inc., Cincinnati, OH.;Environmental Monitoring and Support Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA-68-02-3767; EPA-600/4-84-047;
Stock Number PB84-200674
Additional Subjects Air pollution ; Transmissometers ; Smoke generators ; Performance evaluation ; Responses ; Light(Visible radiation) ; Light transmission ; Field tests ; Laboratory equipment ; Design criteria ; Calibrating ; Opacity ; Air pollution detection ; EPA method 9 ; Stationary sources ; Procedures
Library Call Number Additional Info Location Last
NTIS  PB84-200674 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 60p
The basic concept of photopic response is a major factor in the design of the smoke generator transmissometer used at visible emission training schools. The term 'photopic' refers to having the daylight spatial response characteristics of the human eye. This study evaluated three transmissometer systems, the reference daylight-photopic system, the tungsten-photopic system, and the tungsten-near-photopic system, to determine whether these three systems had significantly different response characteristics. In addition, a simple procedure was developed for checking the photopic response of transmissometer systems. Results are discussed.