GAS DETECTOR

GAS DETECTOR

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 twe...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: UKO TOSHIHIRO
Format: Patent
Sprache:eng
Schlagworte:
ALARM SYSTEMS
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung: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.