Title:
SYSTEM FOR DETERMINING OPERATING CONDITION OF SMALL-VOLUME PROVER
Document Type and Number:
Japanese Patent JP3544111
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To make normal operation confirmable, by judging the operating conditions of a small-volume prover(SVP) from the detection order of the signals of location marks.
SOLUTION: In normal operating conditions, a measuring piston 16 starts to run by the approach of a valve disk piston 12 to an inflow-side through hole 9, immediately after this, the valve disk piston 12 blocks the inflow-side through hole 9, and continuously the measuring piston 16 starts measurement. A location detector 21 is set to detect that the valve disk piston 2 has reached a close location as a pulse signal S4 between pulse signals S34 and S25. The relation with other pulse signals S11, S22, etc., is indicated by the order of S11, S22, S33, S34, S4. S25, and S16. By determining the detection order of these pulse signals, it is possible confirm the operating conditions of the valve disk piston 12 and the measuring piston 16 and whether approach time is reliably secured or not, and it is possible to perform accurate measurement.
Inventors:
Iida, Hajime
Hatanaka, Takehiro
Inagaki, Masaru
Hatanaka, Takehiro
Inagaki, Masaru
Application Number:
JP1998000018703
Publication Date:
April 16, 2004
Filing Date:
January 30, 1998
Export Citation:
Assignee:
OVAL CORP
International Classes:
G01F3/16; G01F25/00; G01F3/02; G01F25/00; (IPC1-7): G01F25/00; G01F3/16