Pump control unit

摘要

A pump control system includes a controller coupled to first and second pressure sensors. The sensors couple serial pressure related information to the controller. The controller can evaluate respective liquid levels, in response to received pressure related information from the sensors. A current sensor coupled to the controller can provide signals indicative of operation of one or more pumps coupled to the controller. The controller includes circuits to detect the presence of predetermined faults and to emit an audible fault indicator in response thereto.

主权项

1. A pump control unit comprising:
a housing; control circuits; at least one pressure sensor, carried in the housing at a location irrespective of a pump turn-on level, the sensor measures ambient fluid pressure and emits a digital representation of the ambient fluid pressure with the sensor coupled to the control circuits; at least one manually operable fluid level adjusting element coupled to the control circuits; and a pump switching circuit coupled to the control circuits, wherein, responsive to user input, the element adjusts a pump turn-on fluid level whose pressure is being sensed by the sensor, and wherein the pump switching circuit includes a solid state switching device in parallel with a mechanical switch.