Difference between revisions of "Caveats"
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* Place device in shadow: It is sensitive to very quick changes in humidity / lighting (e.g. scattered clouds on sunny day) – resulting in undesirable peaks which are ruled out by moving average of 6 or 12 values | * Place device in shadow: It is sensitive to very quick changes in humidity / lighting (e.g. scattered clouds on sunny day) – resulting in undesirable peaks which are ruled out by moving average of 6 or 12 values | ||
* Right now, only AE51 (Pallflex T60A20) and AE33 Filter are supported - we can easily support more filter typed by adding a | * Right now, only AE51 (Pallflex T60A20) and AE33 Filter are supported - we can easily support more filter typed by adding a filter specific scattering factor. Just let us know which one and send us a sample. Depending on the paper, the frequency to change the filter can vary a lot. | ||
* Control airflow on non-stabilized pumps is not convenient without airflow meter | * Control airflow on non-stabilized pumps is not convenient without airflow meter | ||
* The filter is saturated at approx 30% attenuation. This takes in heavily polluted areas around 6 hours, in berlin city around | * The filter is saturated at approx 30% attenuation. This takes in heavily polluted areas around 6-12 hours, in berlin city around 3-5 days. If the filter is used any further, accuracy will be suffering. Values will be flagged properly in .csv file. | ||
Latest revision as of 21:21, 6 October 2022
- Place device in shadow: It is sensitive to very quick changes in humidity / lighting (e.g. scattered clouds on sunny day) – resulting in undesirable peaks which are ruled out by moving average of 6 or 12 values
- Right now, only AE51 (Pallflex T60A20) and AE33 Filter are supported - we can easily support more filter typed by adding a filter specific scattering factor. Just let us know which one and send us a sample. Depending on the paper, the frequency to change the filter can vary a lot.
- Control airflow on non-stabilized pumps is not convenient without airflow meter
- The filter is saturated at approx 30% attenuation. This takes in heavily polluted areas around 6-12 hours, in berlin city around 3-5 days. If the filter is used any further, accuracy will be suffering. Values will be flagged properly in .csv file.