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satyag
Visitor II
August 25, 2015
Question

LPS25HB data reading 6.4mBar Offset Error

  • August 25, 2015
  • 2 replies
  • 1081 views
Posted on August 25, 2015 at 13:12

​Hi,

I working with Barometric Pressure sensor LPS331AP.Its working good. but as this chip absoluted,then we changed design to LPS25HB.But this chip is reading 6.4mBar error apart from the actual measured value .We are not added any offset value and not done any our factory calibration.Just I reading the 24-bit data and displaing converted pressure.I did 't change any code,just I replaced LPS331AP by  LPS25HB chip.

Advice me is it nesassary to change any code ? or any calibration or offset vaules need to set?/

Please advice us...

    This topic has been closed for replies.

    2 replies

    L
    licciardello.anto
    Visitor II
    September 1, 2015
    Posted on September 01, 2015 at 12:16

    Hi,

    the LPS331AP and LPS25HB sensors have a similar register map, but they are not same.

    I suggest to check the initial setting. You can find attached the datasheet for both devices.

    Do you have soldered the device on your customized board?

    If the device is reporting a value with a small offset compared to the expected one, a single point calibration may be needed in order to compensate the post soldering package stress.

    Regards

    Antonella

    ​Hi,

    I working with Barometric Pressure sensor LPS331AP.Its working good. but as this chip absoluted,then we changed design to LPS25HB.But this chip is reading 6.4mBar error apart from the actual measured value .We are not added any offset value and not done any our factory calibration.Just I reading the 24-bit data and displaing converted pressure.I did 't change any code,just I replaced LPS331AP by LPS25HB chip.

    Advice me is it nesassary to change any code ? or any calibration or offset vaules need to set?/

    Please advice us...

    ________________

    Attachments :

    DM00036196_LPS331AP.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HyrL&d=%2Fa%2F0X0000000bJt%2F_dBBD_D1seLR5MeZE4G1yGbpYTTeDIFVXpPI_FQD8q8&asPdf=false

    DM00141379_LPS25HB.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzJ1&d=%2Fa%2F0X0000000bJp%2FeAoB1wUGNlozK6yuaH7bJB8lasKjhGFlKyt.GoaWQoE&asPdf=false
    Y
    Yeonsik Yu
    Visitor II
    February 15, 2017
    Posted on February 15, 2017 at 09:04

    Hi~

    I am experiencing exactly same problem. I also see 6mbar offset. 

    Did you find any solution for this problem?

    Thanks in advance.

    Yeonsik

    M
    Mahaveer Jain_O
    Visitor II
    February 18, 2017
    Posted on February 18, 2017 at 00:47

    Please check the answer on

    https://community.st.com/0D50X00009XkYHDSA3

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