| 摘要 |
A microcontroller establishes normal operation and vacuuming operation profiles of time and vacuum for a pool or spa circulating pump. A user slightly adjusts the levels of vacuum within a predetermined range for storing a vacuum profile envelope within the memory for a normal pump circulating operation and a vacuum profile envelope within the memory for a vacuuming operation. A comparator compares actual inputs of time-from-start and pump vacuum with the normal operation envelope during normal operation of the circulating pump. The comparator compares real time inputs of the sensed vacuum and the time-from-start when the controller is in the vacuuming mode with the vacuuming envelope stored in the memory. Deviations of the sensed pressures from the envelope cause pump shutdown and alarm activation. A calibration switch is positioned inside a locked weatherproof control enclosure. That switch must be pressed before a pump start switch is started for normal circulating operations, or a vacuum switch is pushed for a pool or spa vacuuming operation. During or after the automatic calibration, variations of expanding or shrinking a deviation envelope may be controlled by switches before the calibration switch is deactivated. Lights blink with sequences to indicate selected vacuum levels, and the levels are displayed on an alphanumeric display. An auto restart switch is also located inside the locked control enclosure for allowing the system to automatically close the power relay and restart the pump after power outages.
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