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    How do I calibrate my Current Sensor connected to my AP9921X-AP9922 Battery Management System?


     
     
    Issue:
    How do I calibrate my Current Sensor connected to my AP9921X-AP9922 Battery Management System

     
    Product line:
    AP9921X
     
     
    Environment:
    All models/ all serial numbers
     
     
    Cause:
    How do I calibrate my Current Sensor connected to my AP9921X Battery Management System

     
     
    Resolution:
    The Current Probe should be calibrated in the field.
    1. Begin by removing the Current Probe from any current carrying conductors and isolating it from magnetic fields.
    2. With the AP9921X BMS powered on and operational, log into the BMS via the web user interface and take note of the displayed value on the System/Status screen (in Amps DC) for each String Current Probe.


    3. On the left side bar there is a “Calibration” link, click on it. By placing a number of equal but opposite value in each field, the current probe should then indicate a zero-amp current flow.



    4. Return the Current Probe to the correct polar orientation on the current carrying conductors, and see if the reading is displaying the correct flow direction and amplitude. 
     
     

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