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Title:
TEMPERATURE CHARACTERISTIC REGULATING METHOD FOR DIFFERENTIAL PRESSURE MEASURING DEVICE
Document Type and Number:
Japanese Patent JP2001074578
Kind Code:
A
Abstract:

To provide a temperature characteristic regulating method for a differential pressure measuring device of a remote seal type with excellent productivity.

A static pressure characteristic of a zero-point output in the differential pressure measuring device main body is measured (process 1), then a diaphragm unit is attached to the main body to assemble a remote seal-type differential pressure measuring device (process 2), a static pressure characteristic of the zero-point output therein is measured (process 3), the former measured value is subtracted from the latter measured value to calculate the static pressure characteristic of the zero-point output only in the diaphragm unit (process 4), the resulting value is multiplied by a thermal expansion coefficient value of a seal liquid inside the diaphragm unit and divided by the volume compressibility of the seal liquid, given a negative sign, and the temperature coefficient value of a temperature characteristic of the zero-point output is calculated (process 5). A temperature characteristic value of the zero point output in the diaphragm unit is calculated, using the temperature coefficient value to be added to a temperature characteristic value of the zero-point output in the main body, so as to be determined as the temperature characteristic value of the zero-point output in the remote seal-type differential pressure measuring device (process 6).


Inventors:
TANITSU TAKAHIRO
Application Number:
JP24811699A
Publication Date:
March 23, 2001
Filing Date:
September 02, 1999
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD
International Classes:
G01L13/00; G01L19/04; (IPC1-7): G01L13/00; G01L19/04
Attorney, Agent or Firm:
Shoji Shinobe