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Dave Cogan

Member
I have my shunt between the main bus and the battery therefore on startup I should see 20 or 30amps feeding the battery and then it should drop down to around zero as the battery regains full charge.

This isn't the case. I'm showing 20amps the whole flight. If I turn off the master avionics in flight to drop the load the EFIS shows about 7 amps.

I have Shift Adjust set at 0.0
Number Calibration Points at 2 (it won't let me set at 1).
0.00 Add Value of 2497 which seems right
0.00 Add Value 0

Have people put in additional add value points?
What results are others getting?
 
You have your shunt wired in "battery lead" mode but AFS EMS only supports the shunt in "alternator lead" mode. AFS wants you to wire the shunt between the output of the alternator and the buss showing how much current is being put out by the alternator.

The scale for the AFS ammeter indication is 0-60 volts, not -60 0 +60 as in a typical battery lead installation.
 
I forgot about that. AFS units will not do negative current indication.
I used two on mine. A shunt in the standard location, alternator out. And the HAL effect sensor on the main bus.
 
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