Inventors:
George Rhodes - Corrales NM, US
Albert Migliori - Santa Fe NM, US
Tristan Fin - Albuquerque NM, US
Steven Willard - Albuquerque NM, US
Assignee:
AVISTAR, INC. - Albuquerque NM
International Classification:
G01F 17/00, G01F 23/00
Abstract:
A method for detecting loss of SF6 gas from electrical utility apparatus determines a molar ratio of gas in a container at an initial time and of gas in the container at a subsequent time. Measurement of temperature is determined by averaging ambient temperature and temperature of the surface of the container. The initial values of pressure and temperature define the initial value of n as follows:
The value at a subsequent time is
The molar ratio can be defined as
or as