Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1993-10-15
1996-04-02
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033904, 25033907, 25033912, 250343, G01N 2135
Patent
active
055043313
ABSTRACT:
Fluid samples, including petroleum fuels, may be analyzed as to certain properties such as octane number by a near infrared spectrometer by a method which carries out steps of verifying operating conditions of the spectrometer, comparing measured values of absorbance of radiation at predetermined wavelengths with a set of training values for the fluid composition in question and indicating an out of range condition when a predetermined set of measured values, when averaged, exceeds a predetermined limit. The system carries out a verification of its operating conditions by performing a routine analysis on a reference fluid, such as toluene. A so-called diagnostics routine may be performed to verify operating parameters of the system such as the radiation source, and the throughput of certain optical elements whose transmissivity may be affected by residue from the fluids being analyzed. Fluid specimens may be collected in a sample capture system having a plurality of sample capture vessels selectively operated to capture out of specification fluid samples.
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Davidson Timothy M.
Lane Linda M.
Atlantic Richfield Company
Fields Carolyn E.
Yao Joseph D.
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