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  • July 13, 2017 at 11:39 am in reply to: co2 sensor ? #4608
    ON1GL
    Participant

    24 hours later he did it again (auto-calibration), is this going to be a daily event or is this going to stop after some time ?

    Attachments:

    1. co2-b.jpg

    July 12, 2017 at 2:08 pm in reply to: co2 sensor ? #4605
    ON1GL
    Participant

    thanks for replying SaltoUYStation
    there was no power loss, the unit is on a ups.
    It happens about 24 hours after powerup, just read this pdf file
    http://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf it could be autocallibration that kicked in (see page 9) ? but what are the correct values ?

    July 11, 2017 at 12:21 pm in reply to: Introduce Yourself! #4588
    ON1GL
    Participant

    Unit 8200007B is online
    Name is Luc and living in the city centre of Antwerp-Belgium
    The unit arrived yesterday by mail and after some weatherproofing its now up and running at about 4m high at the streetsite.
    I hope the housing wil not influence the readings too much (it’s new and it’s smells….). I used a G352mf housing a little big but the G313mf was just to small.
    Will include some pictures of the installation.
    Next project is to readout the unit and produce graphs locally, I found PRTG for windows, which is free for 100 sensors, but it will require a lot of study, I’m not the software kind of person….

    Attachments:

    1. air-intake-crop.jpg

    2. air-exhaust-at-45°-crop.jpg

    3. Ready-to-go-1-crop.jpg

    4. Go-crop.jpg

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