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Date: Wed, 23 Oct 2013 07:45:51 -0400
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From: Chris Zavatson <chris_zavatson@yahoo.com>
Reply-To: Chris Zavatson <chris_zavatson@yahoo.com>
Subject: Re: [LML] Re: Odyssey PC680 Batteries on Firewall -- Cool Enough?
In-Reply-To: <list-6560189@logan.com>
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Jeff,=0ASomething sounds amiss with your batteries.=A0 Longer cables will i=
ndeed incur a voltage drop under load, but I assume the voltages you listed=
 were open circuit or lightly loaded.=A0 You mentioned the difference is la=
rger after sitting longer.=A0 Is there perhaps a low current drain on one b=
attery?=0AA 6 ft section of 4 gauge wire will see a voltage drop of 1.3 V w=
hen carrying about=A0900 A.=0AAny=A0open circuit voltage=A0south of 12.5 V =
is worth investigating.=0A=A0=0AChris Zavatson=0AN91CZ=0A360std=0Ahttp://ww=
w.n91cz.net/=0A=0A=0A=0AOn Tuesday, October 22, 2013 9:29 AM, Paul Miller <=
pjdmiller@gmail.com> wrote:=0A  =0AOption to monitor temp:=A0 place a small=
 thermistor pad under the battery and monitor battery temps.=A0  It probabl=
y can be an input to an engine monitoring system so no need for a separate =
gauge.=A0 We have that setup on the certified plane.=A0 =0A--=0AFor archive=
s and unsub http://mail.lancaironline.net:81/lists/lml/List.html
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;fo=
nt-size:12pt"><div><span>Jeff,</span></div><div><span>Something sounds amis=
s with your batteries.&nbsp; Longer cables will indeed incur a voltage drop=
 under load, but I assume the voltages you listed were open circuit or ligh=
tly loaded.&nbsp; You mentioned the difference is larger after sitting long=
er.&nbsp; Is there perhaps a low current drain on one battery?</span></div>=
<div><span>A 6 ft section of 4 gauge wire will see a voltage drop of 1.3 V =
when carrying about&nbsp;900 A.</span></div><div><span>Any&nbsp;open circui=
t voltage&nbsp;south of 12.5 V is worth investigating.</span></div><div><sp=
an></span>&nbsp;</div><div><span>Chris Zavatson</span></div><div><span>N91C=
Z</span></div><div><span>360std</span></div><div><span><a href=3D"http://ww=
w.n91cz.net/">http://www.n91cz.net/</a></span></div><div
 class=3D"yahoo_quoted" style=3D"display: block;"> <br> <br> <div style=3D"=
font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande=
, sans-serif; font-size: 12pt;"> <div style=3D"font-family: HelveticaNeue, =
Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12p=
t;"> <div dir=3D"ltr"> <font face=3D"Arial" size=3D"2"> On Tuesday, October=
 22, 2013 9:29 AM, Paul Miller &lt;pjdmiller@gmail.com&gt; wrote:<br> </fon=
t> </div>  <div class=3D"y_msg_container">Option to monitor temp:&nbsp; pla=
ce a small thermistor pad under the battery and monitor battery temps.&nbsp=
;  It probably can be an input to an engine monitoring system so no need fo=
r a separate gauge.&nbsp; We have that setup on the certified plane.&nbsp; =
<br>--<br>For archives and unsub <a href=3D"http://mail.lancaironline.net:8=
1/lists/lml/List.html" target=3D"_blank">http://mail.lancaironline.net:81/l=
ists/lml/List.html</a><br><br></div>  </div> </div>  </div> </div></body></=
html>
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