HDC2010: Humidity accuracy

Hi Allan,

There will be some degradation in accuracy at low %RH, and we do not provide a maximum %RH accuracy below 20%, only that typical that was given. Do you know how accurate their reference is below 20%RH, and how does their temperature data look when they are at low humidity? 

Can you also verify that they used a no-clean solder paste and did not wash the boards?

If all of that looks normal, I would attempt a bake of the boards. Their boards may have been shifted if they came into contact directly with any moisture during storage or shipping. 100C for 12-24 hours is our typical bake recommendation. Followed by 24 hours of rest at ambient conditions. 

For the HDC2010EVM issue, it appears that they are having driver problems. Please have them try the troubleshooting steps from this thread: https://e2e.ti.com/support/sensors/f/1023/t/681030?HDC2010EVM-Driver-installation-issue

Best Regards,
Brandon Fisher

Hi Fisher

For HDC2010EVM, the installation issue is not solved after I tried to go through the steps from this thread: https://e2e.ti.com/support/sensors/f/1023/t/681030?HDC2010EVM-Driver-installation-issue

There are some steps are different:

Open "Device Manager" in Windows  and click on "Ports (COM &LPT1)"

It shows MSP430-USB Example in the list of other device. But, I still can uninstall it.

After I re-install GUI software with HDC2010EVM disconnected and re-plug EVM board to computer, it shows the installation for USB driver is not successful.

I find the D2(red) turns on when it is pluged.

Jiahao

Hi Fisher

For reference TES1162, the accuracy tolerance is 1.8%RH at 10~90%RH.

From TES1162 recording, the temperature reading is about 25 degC in the test. 

The device PCBA was directly produced from the factory, and 3 samples I tried are the same result which only has a reading gap at low humidity.

Because PCB board is packaged without air, we will not bake the board before SMD.

Jiahao

Hi Jiahao,

If you select the MSP430-USB-EXAMPLE device in hardware manager, you should be able to manually update the driver. You can direct the updater to the driver manually rather than letting it search for a driver. The driver is located in the Sensing Solutions EVM GUI installation directory, inside the EVM Driver folder.

Su Jiahao said:

The device PCBA was directly produced from the factory, and 3 samples I tried are the same result which only has a reading gap at low humidity.

Because PCB board is packaged without air, we will not bake the board before SMD.

Are you able to bake just the samples you've tried as a verification? Baking would be the only potential method to recover parts that have been exposed to excess moisture. Typically you would see some offset at all %RH values if that is the problem, but other factors such as chamber oscillation or reference drift could obscure the offset if it is modest.

Best Regards,
Brandon Fisher

Hi Brandon

The GUI file I downloaded from Ti website is a zip file, and it includes only Sensing Solutions EVM GUI.exe.

I located the GUI folder and tried to update the driver, but it shows Windows can't find the device's driver.

For Baking PCBA, I think we can verify EVM board in our testing chamber first and find out what is difference with EVM board and my device. And than, we continue to distinguish if baking PCBA is necessary.  

Thanks for your support and suggestion.

Jiahao

Hi Jiahao,

Yes the driver will not be accessible within the .zip file you downloaded from ti.com, that will just include the installer. are you using Windows 10? 

You are directing the updater to look at the EVM Driver folder inside your Sensing Solutions EVM GUI-1.10.0 installation folder correct? Your install directory should look something like this:

Mine is located inside the default directory: C:\ti\Sensing Solutions EVM GUI-1.10.0.

If you still receive error messages after pointing there then you may have to disable signed driver enforcement (assuming you are operating on windows 8 or 10), then try installation of the drivers again.  

Best Regards,
Brandon Fisher

Hi Fisher,

Customer installed EVM successfully. Their pcb reading is similar to the evm even better a little bit. The reference reading test equipment TES2010  had been calibrated on July 2020 so it should be accurate. Do we need to do any calibration and how for HDC2010?

Please see below data comparison table and let us know if any suggestions?

Regards,

Allan