Integrated water treatment control system with probe failure detection
OwnerPablo F. Navarro, T. Lance Slaterinventors
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Abstract
The integrated water treatment control system incorporates control of filtration, heating, chemical treatment and water conditioning; a programmable display shows values of key parameters, operational settings and system status; a user-selectable multi-line, multi-language display panel has menus and subgenus; a remote access displays through modems and computers; an in-line computation of water saturation index handles sensor and panel keyboard inputs; and a dynamic probe failure detection system is also included.
Claims2
A probe system for measuring a given characteristic of a fluid, the probe system including a flow probe which produces a signal proportional to the given characteristic of the fluid and applies that signal to a probe signal utilization system, the probe system including means to detect failure of the probe, the failure detection means including:
- first means to accept and temporarily store the output of the probe, second means to temporarily disconnect the probe from the probe signal utilization system and to apply an out of range signal to the first means while the probe is disconnected, and third means to measure the recovery of the first means from the out of range signal, thereby to detect failure of the probe, and upon detection of such failure to generate a sensor failure alarm signal.
A probe system as set forth in claim 2 in which the third means also measures application of the out of range signal to the first means and generates a probe failure alarm signal when the applied signal is excessive.
Dependencies are inferred from the claim text.