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Timing in the laboratory: hardware and software solutions.
Intell Instrum Comput 1989 Nov; 7:283-292
Some options for incorporating timing control into experiments were explored, and an attempt was made to illustrate how the use of a hardware clock can often simplify the software requirements. A series of flow charts was provided which can be used as a starting point by the scientific/engineering user as a basis for high precision timing using the Metrabyte CTM-05 Counter/Timer Interface Card. The frame of reference for this discussion was the IBM Personal Computer and equivalent computers. With experience many sophisticated timing regimens can be developed in which the processor need take only a secondary role. With the proper software, the CTM-05 can be invaluable for generating control timing pulses to trigger experimental equipment and for timing experimental processes. In addition event timing can easily be accomplished by using an event to cause the count to be stored in the counter's hold register. With the CTM-05's flexibility some thought has to go into planning the software, but that planning can pay off with simpler software and more flexible hardware in the long run.
NIOSH-Author; Computer-equipment; Medical-research; Safety-research; Control-equipment; Computer-models; Measurement-equipment; Author Keywords: Timing; computer control; clock; IBM-PC; Metrabyte CTM-05
Rickie R. Davis, U.S. Department of Health and Human Services, Centers for Disease Control, National Institute for Occupational Safety and Health Division of Biomedical and Behavioral Science, 4676 Columbia Parkway, Cincinnati, Ohio 45226
Intelligent Instruments and Computers
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division