Title:
GAS DETECTOR
Document Type and Number:
Japanese Patent JPH07311888
Kind Code:
A
Abstract:
PURPOSE: To prevent a gas leakage alarm machine from sending an erroneous report due to temporary gas such as spray, etc.
CONSTITUTION: Three kinds of levels, S1, S2 and S3 are provided for the monitoring level of a gas sensor signal V0. After the level S1 is crossed, a main alarm is inhibited for twenty seconds by a timer T1. When the level S3 is crossed during the operation period of the timer T1, a timer T2 of thirty seconds is started and the level of the main alarm is changed from the S2 to the S3 for the period.
Inventors:
UKO TOSHIHIRO
Application Number:
JP12688894A
Publication Date:
November 28, 1995
Filing Date:
May 16, 1994
Export Citation:
Assignee:
FIGARO ENG
International Classes:
G08B21/00; G08B21/16; G08B29/18; (IPC1-7): G08B21/00; G08B29/18
Attorney, Agent or Firm:
Akira Shioiri (1 person outside)