Title:
APPARATUS FOR CORRECTING INSTRUMENTAL ERROR OF POSITIVE DISPLACEMENT FLOWMETER
Document Type and Number:
Japanese Patent JPH02236123
Kind Code:
A
Abstract:
PURPOSE:To precisely correct and indicate the flow rate by converting the flow rate to a reference value by using a correcting value of high resolution such as viscosity, etc. by the use of a temperature sensor having high measuring accuracy. CONSTITUTION:Pulse signals from a rotary magnetic sensor 7 which transmits the rotation of a rotary body of a flow meter 1 and a temperature sensor 5 are input to an input interface 108 to a split terminal of a central processing unit CPU III-118. The CPU III-118 confirms the input of pulses by checking an input of an input/output interface 108. The flow rate per one pulse is read from the correcting data of the instrumental error stored in a ROM III 117 based on a time interval between the input of pulses and a previous input of pulses, and errors peculiar to the apparatus are corrected for each flow area. Then, a controlling device 100 operates a correcting value of the instrumental error because of the change in volume-specific gravity and viscosity resulting from the temperature change of the liquid.
Inventors:
KITANO AKITOSHI
Application Number:
JP1339490A
Publication Date:
September 19, 1990
Filing Date:
January 23, 1990
Export Citation:
Assignee:
KITANO AKITOSHI
International Classes:
G01F3/10; G01F1/00; G01F15/02; (IPC1-7): G01F1/00; G01F3/10; G01F15/02
Attorney, Agent or Firm:
Hideo Dobashi (1 outside)
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