Multichannel salinity meter

Details Multichannel salinity meter Multichannel salinity meter

1978-09-19

1980-02-26

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

340501, 324 65R, 324439, 324 62, G08B 2300, G01N 2742, G01R 2702

Patent

active

041908279

ABSTRACT:
A multichannel salinity meter combines a semi-squarewave signal with a peak actuated detector to develop a salinity signal proportional to conductivity. Each salinity channel includes a separate presettable alarm level and alarm indicators provided by a blinking lamp at the salinity module, local and remote bells and a remote lamp. a bell cutout switch is provided to optionally silence the local and remote bell indicators. Each salinity channel provides a dump signal which may be used to control a dump valve whereby any alarm condition causes dumping of the water in the alarm channel. A test signal available to each salinity channel provides the instrument with a test mode.

REFERENCES:
patent: 3131346 (1964-04-01), Parke
patent: 3166678 (1965-01-01), Fleshman
patent: 3491287 (1970-01-01), Brown
patent: 3559193 (1971-01-01), Savaglio
patent: 3757205 (1973-09-01), Dauphinee
patent: 3771548 (1973-11-01), Rauchwerger
patent: 3946309 (1976-03-01), Roughton et al.
patent: 3965414 (1976-06-01), Teass, Jr.
patent: 3992662 (1976-11-01), Koepnick et al.

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