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    IAQ sensor values jump over 450 without any evident cause

    BerndW
    New Poster

    IAQ sensor values jump over 450 without any evident cause

    Hello Bosch team,
    we're using the BME 680 for a flush-mounted room sensor (see: https://sorel.de/en/controller/caleonbox-controller/c-lite-thermostat/).
    A beta user reported that within about 10 minutes, the IAQ sensor went from "green" (<50) to over 450 without any evident cause. No cooking, no shower, no close-by objects etc. The sensor was installed on Friday (3 days ago) in a hallway of a house with central heat-recovery ventilation. Before this incident, the user did not notice any IAQ values above 100 in this room. Another sensor in the same house did not show such anomalies.

    Is this a known problem, could it be due to wrong or missing calibration, or do you have any other hint what would cause this misbehaviour?

     

    9 REPLIES 9
    BSTRobin
    Community Moderator

    Re: IAQ sensor values jump over 450 without any evident cause

    Hi BerndW,

    What is the current accuracy value when IAQ value reaches above 450?

    BerndW
    New Poster

    Re: IAQ sensor values jump over 450 without any evident cause

    Sorry, but I didn´t understand your question. I didn´t find any longitude value in the library for the BME680 module or do you want to know the geographics longitude value?

    BSTRobin
    Community Moderator

    Re: IAQ sensor values jump over 450 without any evident cause

    Hi BerndW,

    Sorry, I would like to know the current IAQ accuracy value.

    BerndW
    New Poster

    Re: IAQ sensor values jump over 450 without any evident cause

    Hi BSTRobin,

    no problem! The IAQ accurancy was all the time 3.

    Now we have a second device with unnormal values. That device was placed next to an open window. We recognised a CO2 value of 2500. normal is a  value of round about 700.

     

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