HDC1080: HDC1080DMBR

Part Number: HDC1080

Tool/software:

Hello, please help to guide the following issues. Thank you

1. The patch itself is fine, there is data transmission, but the initial is not normal (indoor air conditioning room exceeds 98%)

2. At first, I thought there was a problem with the patch, so I used a high- air gun to blow the soldering point, and the re-test showed normal (the initial value was between 60-80%)

3. Later, it was verified the low-temperature air gun was blown (70-80℃), and the re-test result was also OK So I would like to ask you, are any specifications and performance issues that need to be paid attention to for this sensor? In addition, there is still a big difference in the initial value (in the same environment), to ensure that the data is true and accurate?

  • Hi Pengzhou Chen, 

    Has the HDC1080 been stored/operating in high-humidity conditions (>75%RH) for an extended period of time? If so, this will temporarily induce a positive RH shift due to excess moisture accumulating in the sensing element. You can recover this positive offset by baking the sensor at high temperature. It seems like the high-temperature air gun worked to "bake" the sensor and get rid of the excess moisture. Other methods for "baking" include using the HDC1080's integrated heater (see device datasheet), or using an oven (suggested procedure below): 

    Best regards,

    Sakeenah