Apparatus for calibrating a mass air flow sensor using an oscill

Details Apparatus for calibrating a mass air flow sensor using an oscill Apparatus for calibrating a mass air flow sensor using an oscill

1994-09-29

1995-10-10

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01F 2500

Patent

active

054561019

ABSTRACT:
A method and apparatus for calibrating a mass air flow sensor in which the sensing elements of the sensor are subjected to an oscillating mass air flow summed with an offset mass air flow to produce the summed mass air flow. The output waveform of the mass air flow in response to the summed mass air flow is displayed on a display having a desired waveform superimposed thereon. Selected resistors in the sensor's electronic circuit are then trimmed to conform the waveform output by the mass air flow sensor with the superimposed desired waveform.

REFERENCES:
patent: 3425262 (1969-02-01), Herzog
patent: 4324127 (1982-04-01), Gazzara et al.
patent: 4337639 (1982-07-01), Jackson
patent: 4341107 (1982-07-01), Blair et al.
patent: 4393697 (1983-07-01), Sato et al.
patent: 4671097 (1987-06-01), Kurki et al.
patent: 4685324 (1987-08-01), Bourdon et al.
patent: 5390528 (1995-02-01), Zurek et al.

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