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Changes for page GLS-LCCT

Last modified by Mark Kohlmann on 2021/12/08 00:15
From version 3.2
edited by Mark Kohlmann
on 2020/04/17 16:43
Change comment: (Autosaved)
To version 3.3
edited by Mark Kohlmann
on 2020/04/17 16:46
Change comment: There is no comment for this version

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1 -The GLS-LCCT is an outdoor rated (IP67) sensor capable of reading daylight intensity (Lux) and Color Temperature (K) as well as RGB and HSV in CIE 1931 2° Standard Observer color coordinates.  The sensor is designed to be installed on the roof of a building and features an internal heater to handle winter weather conditions.  The sensor delivers Lux values between 0 and 100,000 in 10 Lux increments.  Color temp is provided between
1 +The GLS-LCCT is an outdoor rated (IP67) sensor capable of reading daylight intensity (Lux) and Color Temperature (K) as well as RGB and HSV in CIE 1931 2° Standard Observer color coordinates.  The sensor is designed to be installed on the roof of a building and features an internal heater to handle winter weather conditions.  The sensor delivers Lux values between 0 and 100,000 in 10 Lux increments.  Color temp is provided between 2000K to 25000L (optimized for 2700 to 5700K).  The field of view is 360° semispherical, meaning the sensor collects light from 90° in any direction from straight up.  Color calculations are based on the D65 white illuminant using sRGB color gamut.
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4 4  ==== GLS-LEXT Replacement Considerations ====
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6 -Crestron discontinued the GLS-LEXT with the introduction of the GLS-LCCT.  The GLS-LEXT is a calibrated purpose built sensor for detecting light levels above or below a threshold.  The sensor is generally positioned on the side of a building facing North out of direct sunlight.  The deployment for the GLS-LCCT is completely different with the sensor recommended to be installed on the roof of the building.
6 +Crestron discontinued the GLS-LEXT with the introduction of the GLS-LCCT.  The GLS-LEXT is a calibrated purpose built sensor for detecting light levels above or below a threshold.  The sensor is generally positioned on the side of a building facing North out of direct sunlight.  The deployment for the GLS-LCCT is completely different with the sensor recommended to be installed on the roof of the building.  This type of installation may not be ideal for use as an exterior photocell.  In an effort to determine the best settings for the GLS-LCCT Chief Integrations deployed a GLS-LCCT and GLS-LEXT mounted in the same enclosure with the LEXT facing North as specified and the LCCT facing upward.  Data was captured over for a month and analyzed.  When using GLS-LEXT a system typically switches between nighttime and daytime around 1.25V DC (the logic threshold on Crestron Versiports and Digital Inputs).  0-10V values are scaled from 0 to 65535.  1.25V translates to ~~8200.  Below is a graph of data from one of the recorded days showing the GLS-LEXT using 0 to 65535 units and the GLS-LCCT showing true Lux readings.
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