Arrangement for drift compensation in a gas analyzer

Details Arrangement for drift compensation in a gas analyzer Arrangement for drift compensation in a gas analyzer

1976-04-30

1978-01-10

Pellegrino, Stephen C.

Surgery

Truss

Perineal

73 23, 356206X, 250373, A61B 500, G01N 3100

Patent

active

040673200

ABSTRACT:
An arrangement for automatic drift compensation in a gas analyzer in which a source of radiation radiates through the gas to be analyzed, and directs the radiation onto a detector. The latter forms an amplified output signal corresponding to the detector output and corresponding to the gas concentration. A signal storage stores the signal corresponding to the output signal of the detector when the gas to be analyzed has a predetermined concentration. A comparator compares the output signal from the detector with the stored signal. The gas analyzer is used for determining the content of a predetermined gas in a mixture of gases exhaled by a patient. A circuit connected between the detector output and the comparator input delivers to the storage a signal during the inspiration phase of the patient.

REFERENCES:
patent: 3308648 (1967-03-01), Moultou et al.
patent: 3384746 (1968-05-01), Benz et al.
patent: 3807876 (1974-04-01), Nakahara et al.
patent: 3826920 (1974-07-01), Woodroffe et al.
patent: 3886929 (1975-06-01), Hoppesch

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