Issue
The Insight Sensor and Multi Sensor Ambient Light Sensor require calibration before they can be effectively used.
Product Line
EcoStruxure Building Operation.
Environment
- Insight Sensor.
- Multi Sensor
Cause
When setting up a new Insight Sensor or Multi Sensor device, the default settings for Gain and offset may result in inaccurate readings. Calibration is necessary to ensure accurate data collection based on the specific installation area.
Resolution
To perform the calibration, the following two tasks need to be carried out manually:- Calibrate the Light Sensor:
- Conduct the calibration process in an environment without any daylight for optimal results.
- Set the light to 100%.
- Measure the lux level at the reference point using a lux meter.
- Adjust the gain settings on the sensor to match the measured lux level.
- Linearize the Feedback Signal:
- In some cases, lights may not provide a linear feedback (lux level) as the output increases.
- To compensate for this non-linearity, the signal from the controller is linearized before being sent to the output.
During the optimization phase, the controller incrementally increases the output in 10% steps, measuring the adjacent lux levels for each step. The maximum lux supplement is calculated by subtracting the lux level at 100% output from the lux level at 0% output.
After the optimization phase, breakpoints are determined and verified by re-running the test. If the results fall within the maximum difference limit compared to a linear signal, the calibration test is considered valid.
Remember, performing the calibration process without any daylight present will yield the best results.
