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Incorrect AMPS reading. (Read 393 times)
Sep 4th, 2017 at 6:49am

Anna   Offline
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Hello.
Strange Problem.
AMP meter in SkyView always shows random (but high) value - about 25-35A whit any loads disabled. When engine running (Titan O-370) - about 60A.
Mystical moment - this value shows even master switch is off.
On screenshots configuration - disconnected motor cable, disconnected board battery, SkyView runs with internal battery. Testing 24/25 pins as recommended in similar topics - negative, shows any values, but not zero. Wires between shunt and EMS - OK.
I ready to believe in EMS malfunction Sad But maybe exists options what I may to test?
Thanks!
 
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Reply #1 - Sep 4th, 2017 at 7:00pm

kurt Rutkowski   Offline
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The AMP input is a differential amplifier input. So, if you short those two wires together (C37 P24/25) this will force the input to 0 volts. The SV should display 0 Amps with two wires shorted together. If not then the EMS is bad. If it displays 0 Amps then you have something miss-wired. Base on your display of sensor debug data the SV is displaying exactly what it thinks it is seeing (x 1000).
Check you crimps!

Kurt
« Last Edit: Sep 4th, 2017 at 7:02pm by kurt Rutkowski »  
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Reply #2 - Sep 4th, 2017 at 10:53pm

Anna   Offline
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Kurt, as I said in the first message - 24/25 wires is good - checked more than once. Shortening them not give anything - the ammeter shows the initial wrong value (25-30A), but not reset to zero. Also, I tested this on the shunt, and also directly in C37 plug.
Apparently, really EMS hardware failure?

Anna
 
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Reply #3 - Sep 5th, 2017 at 2:00pm

Dynon Avionics   Offline
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The other thing to check is that those pins are really continuous to the connector. You can try connecting the wires together like you have, and then check that pins 24/25 are shorted together with a multimeter touching both on the face of the connector.
 

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Reply #4 - Sep 6th, 2017 at 7:47pm

kurt Rutkowski   Offline
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Anna,

Looking at your engine gauges i noticed the Manifold pressure reading 2.6 inHg, Oil pressure and Temp "X"ed out.  even if you are on Dynon internal battery you should see real data on these.  Is this a flying aircraft? Has this ever worked?  Has the EMS been fully configured?  You may have a ground issue or a config issue.  Looks too me you have more than a single AMP reading that is wrong...

Kurt
 
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Reply #5 - Sep 7th, 2017 at 11:15pm

Anna   Offline
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Dynon Avionics wrote on Sep 5th, 2017 at 2:00pm:
The other thing to check is that those pins are really continuous to the connector. You can try connecting the wires together like you have, and then check that pins 24/25 are shorted together with a multimeter touching both on the face of the connector.


Tried. Amps reading stay wrong. No zero indicates when shorted.

Kurt, on screenshots only EMS and SkyView connected. All engine sensors, board battery is disconnected, but amps shows this. I tried to show that the ammeter shows values even when it has nothing to measure. When all system connected - pressure, temps and other gauges working fine. Aircraft on this moment in final assembly process, not flying yet. This problem with EMS meets on first ground engine tests.
 
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Reply #6 - Sep 11th, 2017 at 4:49pm

Dynon Avionics   Offline
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That sounds like there's a hardware issue with the EMS module. Give our support team a call at 425-402-0433 or support at dynonavionics dot com.
 

Please do not use Private Messaging on form to contact. For private support:
Email: support at dynonavionics dot com
Phone: 425-402-0433 (7am-5pm Pacific weekdays)
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