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    BME688 service life

    BME688 service life

    Pai
    New Poster

    Hi

    The conditions are as follows:

    1. BME688 uses parallel mode
    2. Set 10 points, which are consistent with example (parallel_mode.c):
           /* Heater temperature in degree Celsius */
           uint16_t temp_prof[10] = { 320, 100, 100, 100, 200, 200, 200, 320, 320, 320 };
           /* Multiplier to the shared heater duration */
           uint16_t mul_prof[10] = { 5, 2, 10, 30, 5, 5, 5, 5, 5, 5 };
    3. Continuous sampling multiple times, no sleep

    Problems
    1) When the heating temperature is 100 ℃, the resistance value will reach the peak of 102400000 ohms (gas_range and gas_res_adc are both 0)
    2) After testing for about a month, the sensor has no reaction to some gases
    wonder:
    1) Is it caused by no sleep in each test?
    2) Does not sleep affect sensor life?
    3) What conditions will affect the life of the sensor: for example, the selection of parallel mode or force mode, the selection of heating temperature, gas concentration, or the above mentioned sleep?

    Thank you for your answer

    5 REPLIES 5

    BSTRobin
    Community Moderator
    Community Moderator

    Hi Pai,

    We do not recommend using continuous mode in the final product. If you need to record data or do tests, you can use the continuous mode. When the temperature exceeds 60°, you must stop using it to prevent the chip from burning out at a higher temperature.

    Hi

    By 100 ℃, I mean Heater temperature, not ambient temperature.The corresponding heater step are stored in the registers res_heat_x<7:0>

    BSTRobin
    Community Moderator
    Community Moderator

    Hi Pai,

    I mean the temperature value for sensor, not heater temperature.

    zrummler
    Established Member

    Did you ever solve this? Heating temperature of 100C? I'm experiencing nearly the same issue.

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