Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-11-27
1989-07-11
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
324444, 324449, 210106, 210 961, 210 86, 210670, G08B 2100
Patent
active
048475980
ABSTRACT:
A signal responsive circuit especially adapted for use in a water treatment system for signaling the need for regeneration of an ion exchange resin bed or the replacement of a particulate filter medium. A series of three electrodes are disposed in the water treatment medium in longitudinally spaced relation along the direction of flow and an alternating current signal drives the center-most electrode. The two outer electrodes are coupled as inputs to first and second operational amplifiers having asymmetrical gain characteristics. When the effective resistance between the center electrode and the two outer electrodes are equal, which is the condition prior to the movement of the hardness front or contamination front to the location of the electrodes, a first signal output condition exists. However, when the resin bed or filter medium becomes "exhausted" to the point where the hardness or contamination front moves to a point between the center and upstream electrode, the signal output condition reverses state and can be used to trigger regeneration or replacement of the medium. The use of an alternating current drive signal obviates problems relating to electrode contamination or erosion. Further, an AGC circuit is utilized to ensure proper operation under variations in ambient conditions, such as temperature changes in the medium. A low pass filter also is effective to render the system less subject to short-duration transient conditions.
REFERENCES:
patent: 2468791 (1949-05-01), Thomson
patent: 2617766 (1952-11-01), Emmett et al.
patent: 2760152 (1956-08-01), Katz et al.
patent: 3172037 (1965-03-01), Pfeiffer
patent: 3282426 (1966-04-01), Entringer
patent: 3618769 (1971-11-01), Iglesias
patent: 3701006 (1972-10-01), Volkel et al.
patent: 3768649 (1973-10-01), Fleckenstein
patent: 4072892 (1978-02-01), Lind
patent: 4177144 (1979-12-01), Hickey et al.
patent: 4262253 (1981-04-01), Clark
patent: 4264439 (1981-04-01), Lefevre et al.
patent: 4320010 (1982-03-01), Tucci et al.
patent: 4331923 (1982-05-01), Akers, Jr.
patent: 4379057 (1983-05-01), Meiser et al.
patent: 4426294 (1984-01-01), Seal
patent: 4442229 (1984-04-01), Emmett
patent: 4587518 (1986-05-01), King
patent: 4594553 (1986-06-01), Varga
patent: 4622133 (1986-11-01), Furuno
patent: 4668386 (1987-05-01), Seal et al.
patent: 4691168 (1987-09-01), Dzula
Sutherland George K.
Tucci Mario A.
Aqua-Tronics, Inc.
Haugen Orrin M.
Jackson Jill D.
Niebuhr Frederick W.
Nikolai Thomas J.
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