Poorly calibrated daylight sensors can result in little or no energy savings—and can also annoy occupants, so it’s worth it to calibrate the sensor settings regularly and confirm that the occupants are satisfied with the performance of the system. 

Sensor surfaces need periodic cleaning and calibration to ensure proper operation. This is usually done every 3–5 years.

Periodically check the calibration of the setpoints on daylight sensors, and adjust for seasonal daylight changes. Make sure that sensors are being used as intended, and not overridden by occupants.

While each space will have its requirements for sensor placement, public hallways and bathrooms are often set to “high sensitivity”—to turn on the lights with the slightest movement—while private office spaces and conference rooms need to be set at moderate sensitivity levels. 

Optimal sensor settings vary depending on how the space will be used, its size, geometry, and the specific sensor specified. Have the controls designer coordinate closely with the sensor manufacturer to determine the best settings for the sensor type and space.

Strategy 3: Occupancy sensors for 75% of lighting load

Lighting control systems need to be commissioned at start-up.  

Be sure to include the sensor controls within the scope of building commissioning for EAp1 and EAc2. 

Arrange a pre-bid or pre-installation training session to be given by the controls manufacturer to the contractor.

In the lighting controls specification, clarify who is responsible for sensor calibration, contractor training, owner/facilities training, and commissioning/verification.