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08-02-2014, 12:52 PM
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Join Date: Feb 2008
Location: Largo, FL
Posts: 1,027
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Dynon Ammeter reading fluctuating
Finished installing my Dynon EMS 120 ---- really big improvement over the eight separate instruments I had in the panel. I have not calibrated my fuel tanks yet, but everything else working well EXCept the ammeter readout.
I am using the GRT CS-01 Hall Effect on the alternator output cable --- The EMS readout rapidly fluctuates, with engine running, anywhere from 5 to 10 amps, or more. It does indicate additional load as I turn stuff on, so I know it is reading the load.
When I use my clamp-on DC ammeter, on the same cable, at the same time, the reading is stable and changes as load is applied.
Any ideas on this?
(again, love the EMS 120!)
Thanks for the help,
Ron
__________________
RV-10 Co-built, maintained, flown (sold)
RV-8A Maintained and flown (Sold)
RV-6A Bought and Flying (N177RV), upgrades $$$
IO360, 180HP/CS, AFS 5600T, D10A, G650, G430, G327, ADS-B, VIZ385 AP
Very Happy Contributor
Comm, SMEL, CFII, A&P
Based at KCLW (Clearwater, FL)
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08-02-2014, 01:58 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,514
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Ron, try the AC setting on the handheld - - does the output have an AC component?
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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08-02-2014, 04:04 PM
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Join Date: Nov 2008
Location: Shreveport, LA
Posts: 1,002
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If you cant get your answer here, I have always had good luck over on the Dynon forum http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl
I really like my D120 as well...... |
08-02-2014, 07:24 PM
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Join Date: Feb 2008
Location: Largo, FL
Posts: 1,027
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Thanks, guys
I will look for the AC component and report back -- and I will try the Dynon forum next --- I too got a lot of good info there during the install.
R.
__________________
RV-10 Co-built, maintained, flown (sold)
RV-8A Maintained and flown (Sold)
RV-6A Bought and Flying (N177RV), upgrades $$$
IO360, 180HP/CS, AFS 5600T, D10A, G650, G430, G327, ADS-B, VIZ385 AP
Very Happy Contributor
Comm, SMEL, CFII, A&P
Based at KCLW (Clearwater, FL)
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08-04-2014, 10:21 PM
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Join Date: Jan 2011
Location: Olympia, WA
Posts: 227
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Move it to the battery + cable, if the flux goes away, then its interference from something else or AC flux from the alternator. If it stays, then could be a sensor, connection, or processor issue. If you are getting significant AC flux from the altrnator, you could have one or more bad rectifier diodes in the alternator.
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