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Closed loop daylight harvesting light control system having auto-calibration

  • US 8,227,731 B2
  • Filed: 09/17/2009
  • Issued: 07/24/2012
  • Est. Priority Date: 05/05/2005
  • Status: Active Grant
First Claim
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1. A method for auto-calibrating a daylight harvesting setting in an occupancy sensor, comprising:

  • activating at least one lighting fixture to illuminate an area at full illumination by the at least one lighting fixture during a predetermined period of time;

    monitoring an illumination level of the area including illumination from the at least one lighting fixture and illumination from external light over the predetermined period of time to determine a lowest illumination level occurring during the predetermined period of time; and

    setting a target illumination level of a lighting control system to the lowest illumination level.

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