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RE: Europa-List: Voltage reading of 25V

Subject: RE: Europa-List: Voltage reading of 25V
From: Karl Heindl <kheindl@msn.com>
Date: Thu, 29 Jul 2010 22:28:08

Greg=2C


The problem is with the EIS=2C only why did it coincide with a battery move
 ?


I checked the voltage in the panel and everything looks fine with the main 
system. 


The EIS gives good readings with the engine off. Thde only anomaly is the v
oltage which says 11.0=2C when it should be 12.5.

When I start the engine the readings go haywire: oil temp is below of what 
is possible=2C pressure is 99=2C cht is 900C. After switching the EIS off a
nd on a few times the readings are good. But then the numbers start bouncin
g around again. Of course Grand Rapids are closed for Oshkosh until Monday
=2C and I am not sure what to do.

Any other ideas ?


Karl 


From: gregoryf.flyboy@comcast.net
Subject: RE: Europa-List: Voltage reading of 25V
Date: Wed=2C 28 Jul 2010 22:02:43 -0700


Hmm..Not sure=2C

My first thought was along the line of what Ira had said..bad ground somewh
ere.

 Try making some measurements between the power and ground rails with a han
dheld meter to confirm what the EIS was reading. Take the measurements with
 the key on and the engine off=2C to eliminate all chance of actually produ
cing deadly avionics voltages from a spinning alternator. What is the EIS r
eading in this configuration(engine off)? Could there be something that was
 connected to the rear-ward wiring that became disconnected when moving the
 battery up front? Is the ground strap to the engine block still connected?

Greg


From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-serv
er@matronics.com] On Behalf Of Karl Heindl
Sent: Wednesday=2C July 28=2C 2010 12:23 PM
Subject: Europa-List: Voltage reading of 25V


This one is for you electric specialists:

All I did was to move the battery back to the firewall from the rear fusela
ge. I fire up the engine for a highspeed taxi test for my MG configuration 
and I get a voltage reading of 25.
I swapped regulators - I always carry a spare  - but no change. I also get 
the same reading with the alternator switched off. What could I possibly ha
ve screwed up ? 
To make things even more perplexing=2C the oil pressure indication does not
 drop below 93=2C as the engine is warming up=2C but maybe the two are some
how related. All readings are from the EIS. Never had a problem like this b
efore. 
Any help appreciated.
Thanks=2C    Karl


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