Ok, now what should I measure?
Many sensors inside a model.
Determining the measurement strategy is an important part of the model design. This should be strongly guided by decisions made when constructing the testing plan mentioned above. Some questions can be answered with a single interior sensor placement and measurement while others require an elaborate network of measurements under multiple model configurations. Knowing exactly what will be measured in advance will greatly influence the construction of the model. The CERES artificial sky instrumentation package has 10 Li-Cor photometric sensors numbered 1 through 10. Sensor 1 is reserved for measurement of the light available outside of the model. Sensors 2 though 10 may be used for interior model measurements. Users of the artificial sky are not obligated to use all 10 sensors; however, any testing exercise must use at least 2 sensors, one outside the model and one inside the model. The outside measurement is always required to determine the DF value previously discussed.
Good use of wires on the inside of the model.
Sometimes it is sufficient to place the available sensors into fixed positions for testing; other times more readings are required and sensors must be made mobile to accommodate all of the desired measurement locations. When testing a larger number of locations in a model, often it is more convenient to use fewer sensors and move them during testing and take multiple readings. Frequently the desired study requires the measurement of horizontal illumination at a given height in a space. In this case a measurement grid across the floor area of the space could be established. For example, after examination it may be determined that a uniform measurement grid of 6 x 7 across the floor plan would be useful. In this case it would likely be best to use 7 interior sensors in a single row and take 6 sets of measurements by moving the sensors between sets. Some considerations for placing and moving sensors are discussed in the next section.While horizontal illumination is most frequently measured, sometimes vertical measurements are more valuable. For example, the determination of the DF and potential daylighting illumination on the vertical surface of book stacks in a library would require that the sensors be recessed flush into vertical surfaces of a modeled book stacks.
I hate spaghetti - Sensor/Wire Management
T-sensor and how sensors fit into this setup.
Making interchangable parts for your modelshows you different design alternatives.
As has been mentioned, the best use of the Mirror Box Artificial Sky is for comparing design alternatives. This likely means that the model will be tested at least twice and that something about the model will be changed between the tests. Planning for and accommodating these changes in advance can save time during testing. Consider designing and constructing the model to allow easily swappable components, walls, daylight apertures and/or surfaces.
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