We have some heavy-duty mining equipment that does constant back and forth movement that covers 30 feet or less. When we try to validate the distance covered, we are not seeing any activity, though it is confirmed that the equipment has been moving. Using text, we set the minimum update interval to 5secs, but we are still not seeing any records of movement. Can you confirm what is the minimum distance that can be recorded between two points by the fmb920.