BMP 280 accuracy

[szohar]

Hi,

We are using the BMP280 in a production design.

We messured few off them and we see in all an Absolute accuracy pressure errors of about 4hPa.

The registers are set as follow 

ctrl_meas 0B10110111 //Temp OS 16X, Press OS 16x, Power Normal

config 0B01010000 ////Inactive 125ms, IIR Filter coefx16, SPI OFF

The Temp I am getting is 32C.

I was using the compensation method given in the API example.

What can be the issues that cases those accuracy problems.

In the data sheet it is also mentioned that for better accuracy please contact the manufacturer, so I do.

Thanks

Sharon

[Jet]

Hi Sir:

   Please see the following picture, you offer trim values of P2 and P3 , which was exchanged.

   I exchanged P2 and P3, but my pressure result is UP: 333767, P32: 100639.

    If all sensor results you verified were the same or similar problem, recommend you should check your current hardware or use other platform to do further analysis.

    Probably there are the hardware interference to affect your sensor.

    If possible, please contact the local FAE to support on site.