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TIDM-LC-WATERMTR: Is the runtime re-calibration mandatory? and how to avoid magnetic interference?

Intellectual 1930 points

Replies: 1

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Part Number: TIDM-LC-WATERMTR

Team,

Here's 2 questions on flowmeter solution.

1.The customer started to use ESI to measure the gas flow. however, they don't want to do runtime re-calibration because ST device does not need to do the runtime recalibration. is this calibration mandatory?

2. even if they are using ESI and metal plate to measure the flow with inductive sensor, still they can't measure the flow well. when the magnet is near sensor, oscillation decreases a lot and it's fail to sense the rotation. how to avoid this kind of interference? it's now mandatory for MP. 

Best Regards,

Ted

  • Hi Ted,

    1. As described in the document of the board, it says that "For a stable, long-running lifetime for the system, the design includes a runtime re-calibration to track the drift of the sensors and system". So I think it is required from the end production. You may need to check with customer how to track the drift with another solution.

    2. Did the customer build the board and software following the guides list below? If it is an urgent case, I would suggest to contact me directly so that you could share the more information related to customer's design.

    http://www.ti.com/lit/an/slaa642/slaa642.pdf

    http://www.ti.com/lit/an/slaa639/slaa639.pdf

     

     Wei,

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