Method and apparatus for monitoring pressure sensors
AssigneeHoneywell Inc.
InventorsWilliam R. Landis, Paul A. Schimbke, Michael J. Seidel
Life of this patent
Estimating the term…
Abstract
A method and apparatus monitor fuel pressure in a heating system where a controller controls actuation of fuel valves. A fuel pressure limit signal is provided to the controller for determining if the fuel pressure crosses predetermined thresholds. In order to avoid nuisance shut-downs, the fuel pressure limit signal is ignored by the controller for a predetermined time interval after the controller has actuated a fuel valve.
Claims6
A method for monitoring fuel pressure in a heating system where a controller controls actuation of fuel valves, the method comprising the steps of:
- providing a fuel pressure threshold signal to the controller for determining whether the fuel pressure reaches predetermined thresholds;
- and
- ignoring the fuel pressure threshold signal for a predetermined time interval after the controller has actuated a fuel valve, to compensate for momentary, transient pressure changes caused by actuation of the fuel valve.
An apparatus for monitoring fuel pressure in a heating system where a controller controls actuation of fuel valves, the apparatus comprising:
- sensing means for sensing the fuel pressure and for providing a fuel pressure threshold signal to the controller when the fuel pressure reaches a predetermined threshold;
- and
- masking means for masking the fuel pressure threshold signal for a predetermined time interval after the controller has actuated a fuel valve, to compensate for momentary, transient pressure changes caused by actuation of the fuel valve.
Dependencies are inferred from the claim text.