Next check in configuration Components to make sure the flowmeter/mag meter is connected to the Module that the flowmeter is Physically connected.

Basically there are 2 reasons that the mag meter doesn't measure correctly if the above are correct:

1) If the actual is consistently different than what the Mixmate says, adjust the calibration:

      New Calibration = Mixmate/Actual*Old Calibration

      For example, Mixmate is showing 100 gallons, but your sprayer tank has 200 gallons and the current calibration is 24.

      100/200 x 24 = 12, so the new calibration would be 12

2) If the actual is sporadically different than what the Mixmate says - This IS a grounding issue - You must figure out what is putting the stray voltage into the liquid. 

3" Arag Mag meter light information.

Green - Liquid Present, No Flow

Blue - Liquid Present, Flow

Purple - No Liquid Detected, Typically Air

Red - Count flashes for error

Flashing Blue/Green - System is not properly grounded with external world.

All other Arag Mag meters

Light toggles Dim/Bright with flow

Also, consider running firmware updates.