HDC2010: HDC2010's humidity malfunction under regular temperature and humidity range.

user6387826

Part Number: HDC2010

Dear team,

I met an issue with HDC2010. We installed some of our sensor units on chicken farms. Most of our sensors' temperature and humidity readings were normal. However, one of the sensor's humidity reading was 0%(should not be this value), but the temperature reading was 25~28C(correct).

Since HDC2010 is a sensor that combines temperature and humidity sensor. In this situation, could the HDC2010's humidity sensor malfunction independently?

What's the warranty lifetime of HDC2010 under the environment at temperature -20 ~50C, and humidity at 25%~95%?

over 5 years ago

0 Nicole Khoury over 5 years ago

TI__Genius 10080 points

Hi user6387826,

Thank you for posting.

It is possible that the wait time is not long enough for the humidity measurement to be completed and loaded, which would result in a correct temperature value and a humidity return of 0% RH. Here is a FAQ on this topic: https://e2e.ti.com/support/sensors/f/1023/t/878721?tisearch=e2e-sitesearch&keymatch=HDC2010

The HDC2010 is subject to TI's Terms of Sale (https://www.ti.com/legal/terms-of-sale.html) and warranty information can be found in Section 8.

Best regards,

Nicole

0 user6387826 over 5 years ago in reply to Nicole Khoury

Prodigy 20 points

Hi Nicole

Thank you so much for your reply. We found one issues in one of our HDC2010. In this sensor, the temperature reading is normal. However, the humidity reading always start from 90% or 100% and drop back to normal reading after we disconnected the power after couple hours (If the system restart immediately, the humidity reading is normal. ). I attached the pictures as below. Have you encounter similar issue before? Do you have any suggestion?

0 Nicole Khoury over 5 years ago in reply to user6387826

TI__Genius 10080 points

Do you have a logic analyzer capture of the I²C read as well as a schematic that you can share?

Additionally, is the board stored around any moisture or being handled directly? These things may be causing the issues that you are seeing. TI’s Storage and Handling Guidelines describes the precautions that are required during storage, assembly, and packaging.

Best regards,

Nicole

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HDC2010: HDC2010's humidity malfunction under regular temperature and humidity range.