Apparatus for measuring the mass of a flowing medium and method

Details Apparatus for measuring the mass of a flowing medium and method Apparatus for measuring the mass of a flowing medium and method

1984-03-01

1989-05-02

Shoap, Allan N.

Thermal measuring and testing

Temperature measurement

With fluid flow deflector

374120, 338195, 7320426, G01F 168, G01K 1300

Patent

active

048263281

ABSTRACT:
An apparatus for measuring the mass of a flowing medium and a method for producing the apparatus. The apparatus includes a carrier, to which at least one resistor layer is applied. To calibrate the resistance value of the resistor layer, material can be removed in a calibration zone on the end of the resistor layer remote from the incident direction of flow. To this end, the resistor layer is connected with a current source furnishing a constant current. The temperature of the resistor layer is measured by means of a temperature measuring device and compared in an electronic device with a predetermined temperature, and the electronic device, upon a deviation of the measured temperature from the predetermined temperature triggers a material removing device for the removal of resistor material in the calibration zone (trimming zone).

REFERENCES:
patent: 3827142 (1974-08-01), Bennett et al.
patent: 3842495 (1974-10-01), Bennett et al.
patent: 4186606 (1980-02-01), Tarumi et al.
patent: 4213335 (1980-07-01), Peter et al.
patent: 4288776 (1981-09-01), Holmes
patent: 4294114 (1981-10-01), Lauterbach
patent: 4304130 (1981-12-01), Peter et al.
patent: 4374314 (1983-02-01), Deacutis

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