Ammeter gage on EDM-900/930 shows charging, but slowly goes down as engine is run. Battery charging. Gauge drops to zero value and then a -1.

Needs to be Calibrated as per EzConfig II. Must first take wire off negative shunt terminal and attach it to the positive terminal first BEFORE calibrating. Once attached, go the ‘EDM Calibration’ page in EzConfigII and look for the ‘Amps Zero’ field. Put in your shunt value and then click ‘Calibrate Now’. After this process has completed, click ‘Finish’.