Measuring and testing – Vibration – By mechanical waves
Patent
1991-09-18
1993-08-24
Noland, Tom
Measuring and testing
Vibration
By mechanical waves
73 6146, 73 6176, 374 45, 62127, G01N 2918, G01N 2500
Patent
active
052378730
ABSTRACT:
A method of identifying refrigerants is disclosed based on an apparatus that first evaporates a refrigerants sample such that all non-condensible contaminants are removed, condenses the refrigerant to a liquid state, then measures the sonic velocity at two different temperatures. Two measurements, taken together, establish the sonic velocity in a temperature coefficient of the sonic velocity, which are used to identify the refrigerant. A self calibration method makes measurements more accurate.
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