MagArrow Magnetic Contamination FAQ - Application https://www.geometrics.com/community/magarrow-application/magarrow-magnetic-contamination-faq/ Geometrics Discussion Board en-US Thu, 12 Mar 2026 12:02:18 +0000 wpForo 60 MagArrow Magnetic Contamination FAQ https://www.geometrics.com/community/magarrow-application/magarrow-magnetic-contamination-faq/#post-1074 Thu, 31 Aug 2023 17:40:12 +0000 Magnetic contamination can be a problem, though rarely. Most often this is caused when a “permanent” magnetic component was accidentally attached to or close to one of the sensors. This can cause big shifts randomly in the data from one or both sensors. Check by removing the sensor door and visually inspect the two MFAM sensors and their surrounding areas for anything unusual.

If you have another magnetometer, like the G-864, you can also measure the magnetic signature of the sensor part of the MagArrow with the following instructions.

    Turn on the magnetometer
    Wave the sensor part of the MagArrow above the magnetometer (as close as possible but not touching)
    Wave in both west and east directions
    Check whether this is any magnetometer reading change when the MagArrow passes by
    If reading changes are observed, there must be some contamination.
]]> Application Gretchen Schmauder https://www.geometrics.com/community/magarrow-application/magarrow-magnetic-contamination-faq/#post-1074