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About larsmats
since
11-18-2022
07-09-2023
larsmats
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05-25-2023
08:53 AM
Hi BSTRobin, They are mounted next to each other in our office canteen - each day there is an expected peak at around 12 noon, except for during weekends. It is a professional office environment otherwise with filtered air conditioning, essentially as could be expected in a relatively modern lab, We are long-term testing our devices to ensure stable operations (over several months). We have several more in the same envionrment but we see a few other instances of these peaks on our other sensors, at different times. Since I wrote to you we upgraded our firmware to include the BSEC 2.4.0, but I see no mention of similar behaviour in the release notes. Thanks, Lars
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05-22-2023
05:14 PM
Dear board, Running several of the BMA688 sensors for several months I notice apparently random, days-long spikes in Co2/Iaq/bvoc baseline values, which I cannot correlate neither to time, environmental or other units running the same sensor. Also it does not correspond to iaq-accuracy, run-in-status or stabilization status values. The graph below shows one sensor behaving nominally (i guess - in green) reporting co2 and one at the same location reporting strange peaks in co2. Both sensors run the 300s / 28d / 3.3v configuration. Any ideas where to start looking for the cause? Among our own theories would be the possibility that a particle may have enterred the sensor, which could be physically possible, but seems a bit far-fetched as the device is in a housing. Thanks, Lars
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11-21-2022
07:44 AM
Thank you, The above is obvious from the datasheet. However, since there are many gases out there it seems unnecessary that each one of your customers should develop the data for common organic compounds, for instance CO (some of which are not so easy to handle). But should I take it as a no? BRs. Lars
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11-18-2022
10:14 AM
Hi, With regards to BME688 I guess there are already several known gases for which there are well-tested configurations available, apart from the Co2 in the default bsec library sources? Any pointers would be deeply appreciated. BRs. Lars
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