Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1997-10-28
2000-09-26
Warden, Sr., Robert J.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204406, G01N 2726
Patent
active
06123818&
ABSTRACT:
An operational amplifier (34) has its inverting input connected to a electrochemical gas sensor (38) for amplifying the current produced thereby in response to presence of a predetermined gas. In order to determine whether a sensor (38) is indeed present and that a sensor present is serviceable, a transient is applied to the non-inverting input of the operation amplifier (34). The presence or absence of the sensor (38) alters the transfer function of the operational amplifier (34) in respect of the test signal. If a serviceable sensor (38) is present, the gain of the operational amplifier (34) is high for the transient resulting at square pulse output. However, if a serviceable sensor (38) is not present, the gain of the operational amplifier (34) is relatively low and the transient retains its original form. Consequently the presence of a serviceable sensor (38) can be determined from the output of the operational amplifier (34) in response to the transient test signal.
REFERENCES:
patent: 3661748 (1972-05-01), Blackmer
patent: 3718568 (1973-02-01), Neuwelt
patent: 4088986 (1978-05-01), Boucher
patent: 4868508 (1989-09-01), Ohishi
patent: 5202637 (1993-04-01), Jones
Aldag Andrew
Warden, Sr. Robert J.
Zellweger Analytics Ltd.
LandOfFree
Gas detecting apparatus having condition monitoring means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas detecting apparatus having condition monitoring means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas detecting apparatus having condition monitoring means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2096732