Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1985-12-05
1987-08-11
Goldstein, Herbert
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73204, G01F 168, G01F 2500
Patent
active
046853243
ABSTRACT:
The flowmeter comprises a variable gain amplifier (1) whose input is connected to ground through a resistor (4) of constant resistance of low value relative to the input impedance of the amplifier, the thermoresistant element (3) being connected between the input and the output of the variable gain amplifier (1) and means (2) being provided for adjusting the value of the gain of the amplifier in such manner as to obtain the desired value of the current in the thermoresistant element (3) corresponding to the constant temperature it is desired to obtain.
REFERENCES:
patent: 3449953 (1969-06-01), Craft
patent: 4523462 (1985-06-01), Kolodjsni
Transactions of the Institute of Measurement and Control, vol. 3, No. 2, Jun. 1981, pp. 71-78, Dorking, G. B.; S. Marlowe, entitled "A Microprocessor-Based Automatic Polynominal Lineariser for Constant-Temperature Anemometry Systems".
Bourdon Guy
Lampin Dominique
Goldstein Herbert
L'Air Liquide
Robinson, Jr. Lee C.
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