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HDC1080: Heater turned on timing

Kuramochi Tadahiko
Guru 28715 points
Part Number: HDC1080

Hi,

I would like to know the timing to turn on the heater inside the device and referred the following thread.

Carmine-san is saying that "The HDC1080 is able to auto detect the condensation".

Does auto detection mean any function inside the device to turn on the heater?

Or should users structure the system detecting sudden condensational dropping by themselves?

Best Regards,

Kuramochi

  • 0
    TI__Expert 5145 points

    Dear Kuramochi-san,

    the timing to turn on the heater inside the device strongly depend from the environmental conditions.

    For example, if your customer want to use the heater to remove condensation, he can switch on the heater when he detects condensation, and switch it off as soon as the condensation goes away.

    Regarding the capability of the HDC1080 to auto detect the condensation, it is only for alert. The customer is in charge to capture the alert from the device and switch on the heater. The alert condition is presented at output the HDC1080 that suddenly drops from about 100% to 0% (this is not physically possible, and it indicates that there is condensation).

    Your customer should continuously read the output of the HDC1080 and if he detects that the output suddenly falls from about 100% to 0%, he can switch on the heater, and increase the output reading frequency, for example at 50 samples for second (in order to increase the temperature of the heater). As soon as he detects that the HDC1080 output suddenly pass from about 0%RH to about 100%RH, he should switch off the heater, and decrease the output reading frequency at 1 sample per second, in order to avoid that the self heating impacts on the temperature sensor accuracy.

    Please let me know if you have any questions.

    Best regards,

    Carmine