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Changes for page GLS-LCCT

Last modified by Mark Kohlmann on 2021/12/08 00:15
From version 6.1
edited by Mark Kohlmann
on 2020/04/21 18:14
Change comment: There is no comment for this version
To version 7.1
edited by Mark Kohlmann
on 2020/04/21 18:17
Change comment: There is no comment for this version

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12 12  
13 13  ==== ====
14 14  
15 -==== GLS-LEXT Replacement Considerations ====
15 +==== GLS-LEXT Replacement Considerations {{id name="GLS-LEXT Replacement Considerations"/}} ====
16 16  
17 17  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, effectively placing it in the shade.  The deployment for the GLS-LCCT is completely different with the sensor recommended to be installed on the roof of the building in direct sunlight (shadows produce cooler color temperatures).  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.
18 18  [[image:1587141607775-195.png]]