Electricity: measuring and testing – Electrolyte properties – Using a ph determining device
Patent
1989-05-16
1991-03-05
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrolyte properties
Using a ph determining device
3072723, 34087004, 324601, G01N 2746
Patent
active
049980688
ABSTRACT:
Apparatus and method are provided to ensure accuracy of a measurement signal obtained using a potentiometric sensor placed in a solution. The apparatus includes an interface amplifier that generates a relatively large turn-on bias current whenever the amplifier is initially powered on. To avoid polarization of the potentiometric sensor by the turn-on bias current, a switch device is used to direct the turn-on bias current along a path away from the potentiometric sensor. The switch device is controlled using a timer circuit that causes a change in position of the switch device after a predetermined time delay. During the time delay, the bias current reduces to a normal value and polarization of the potentiometric sensor has been avoided. An accurate measurement of a physical parameter associated with the solution can then be taken without the detrimental effect of the turn-on bias current on the potentiometric sensor. The apparatus has particular utility in obtaining water quality data, such as hydrogen potential, specific ion potential and oxygen reduction potential.
REFERENCES:
patent: 3568085 (1971-03-01), Pimenoff
patent: 3988689 (1976-10-01), Ochi
Eisenzopf Reinhard J.
In-Situ, Inc.
Solis Jose M.
LandOfFree
Bias current control for providing accurate potentiometric measu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bias current control for providing accurate potentiometric measu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bias current control for providing accurate potentiometric measu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-499180