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Message-ID: <1b4b137c0708030534p256ae6d1wc999470bf501658e@mail.gmail.com>
Date: Fri, 3 Aug 2007 08:34:05 -0400
From: "Tracy Crook" <tracy@rotaryaviation.com>
Sender: rwstracy@gmail.com
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] EM2 question
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No time for temperature measurement instrumentation theory 101 today so I'll
just give you the typical values for the coolant (and oil) temperature
channels.  Just plug these values in and see what happens.

Scale factor -  2.151
Low end offset  - 100
Sensor offset -  390
Low alarm limit  - 0  (or whatever you want)
High alarm limit -   210 for 2 & 3 gen, 225 for Renesis

If still no joy, disconnect the temp sensor and check reading for change.
If no change,  disconnect wire for coolant temp at EM2 connector and check
for change

If still no change, EM2 is bad (not likely since similar channels on unit
are working)

Most likely problem is a short to ground on the sensor line.

Hope this helps.

Tracy  (suddenly busy again)


On 8/2/07, Christopher Barber <CBarber@texasattorney.net> wrote:
>
> Shocking....Chris is asking another question about the EM2.  Hey, me
> asking
> questions means I am out there trying to make progress......not that I am
> defensive or anything <g>
>
> Anyway, since my "buttons" issue the Coolant Temperature on the main
> screen
> has been showing "0".    The oil temp is working ok.  I figured that I
> must
> have inadvertently set it to 0 when I was having my button problem.  I
> figured now that the buttons are working properly I could just go and
> calibrate it.  Figured a good starting point would be to use the cold oil
> temp as a guide.  However, when I try to calibrate it, it will not change
> from zero.  I thought that maybe there was not % change from zero and I
> tried changing other calibration modes but nothing I have currently tried
> has changed it from zero.  I admit to very little current understanding of
> the calibration feature at this time (even though  I really like that it
> is
> included in the EM2....I like options even though they can be a pain
> sometimes).
>
> Any direction on how to get this off of zero would be helpful as I am
> hesitant to start the dang thing 'till I can know how hot the coolant
> is....I know I can get some idea from the oil, but still.
>
> David Staten will probable be much better at figuring this out, but we
> have
> not been able to meet up for actual progress in the last few days.  TIA.
>
> All the best,
>
> Chris
>
> Christopher Barber
> Attorney and Counselor at Law
> 5110 Bissonnet, No 418
> Bellaire, Texas 77401
>
> Serving the Needs of Senior Texans
>
> 281-464-LAWS (5297)
> 281-754-4168 Fax
> www.TexasAttorney.net
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>

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<div>No time for temperature measurement instrumentation theory 101 today so I&#39;ll just give you the typical values for the coolant (and oil) temperature channels.&nbsp; Just plug these values in and see what happens.</div>
<div>&nbsp;</div>
<div>Scale factor -&nbsp; 2.151</div>
<div>Low end offset&nbsp; - 100</div>
<div>Sensor offset -&nbsp; 390</div>
<div>Low alarm limit&nbsp; - 0&nbsp; (or whatever you want)</div>
<div>High alarm limit -&nbsp;&nbsp; 210 for&nbsp;2 &amp; 3 gen, 225 for Renesis</div>
<div>&nbsp;</div>
<div>If still no joy, disconnect the temp sensor and check reading for change.</div>
<div>If no change,&nbsp; disconnect wire&nbsp;for coolant temp at EM2 connector and check for change</div>
<div>&nbsp;</div>
<div>If still no change, EM2 is bad&nbsp;(not likely since&nbsp;similar channels on unit are working)&nbsp;</div>
<div>&nbsp;</div>
<div>Most likely problem is a short to ground on the sensor line.</div>
<div>&nbsp;</div>
<div>Hope this helps.</div>
<div>&nbsp;</div>
<div>Tracy&nbsp; (suddenly busy again)<br><br>&nbsp;</div>
<div><span class="gmail_quote">On 8/2/07, <b class="gmail_sendername">Christopher Barber</b> &lt;<a href="mailto:CBarber@texasattorney.net">CBarber@texasattorney.net</a>&gt; wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Shocking....Chris is asking another question about the EM2.&nbsp;&nbsp;Hey, me asking<br>questions means I am out there trying to make progress......not that I am
<br>defensive or anything &lt;g&gt;<br><br>Anyway, since my &quot;buttons&quot; issue the Coolant Temperature on the main screen<br>has been showing &quot;0&quot;.&nbsp;&nbsp;&nbsp;&nbsp;The oil temp is working ok.&nbsp;&nbsp;I figured that I must<br>
have inadvertently set it to 0 when I was having my button problem.&nbsp;&nbsp;I<br>figured now that the buttons are working properly I could just go and<br>calibrate it.&nbsp;&nbsp;Figured a good starting point would be to use the cold oil<br>
temp as a guide.&nbsp;&nbsp;However, when I try to calibrate it, it will not change<br>from zero.&nbsp;&nbsp;I thought that maybe there was not % change from zero and I<br>tried changing other calibration modes but nothing I have currently tried
<br>has changed it from zero.&nbsp;&nbsp;I admit to very little current understanding of<br>the calibration feature at this time (even though&nbsp;&nbsp;I really like that it is<br>included in the EM2....I like options even though they can be a pain
<br>sometimes).<br><br>Any direction on how to get this off of zero would be helpful as I am<br>hesitant to start the dang thing &#39;till I can know how hot the coolant<br>is....I know I can get some idea from the oil, but still.
<br><br>David Staten will probable be much better at figuring this out, but we have<br>not been able to meet up for actual progress in the last few days.&nbsp;&nbsp;TIA.<br><br>All the best,<br><br>Chris<br><br>Christopher Barber<br>
Attorney and Counselor at Law<br>5110 Bissonnet, No 418<br>Bellaire, Texas 77401<br><br>Serving the Needs of Senior Texans<br><br>281-464-LAWS (5297)<br>281-754-4168 Fax<br><a href="http://www.TexasAttorney.net">www.TexasAttorney.net
</a><br><br><br><br>--<br>Homepage:&nbsp;&nbsp;<a href="http://www.flyrotary.com/">http://www.flyrotary.com/</a><br>Archive and UnSub:&nbsp;&nbsp; <a href="http://mail.lancaironline.net:81/lists/flyrotary/List.html">http://mail.lancaironline.net:81/lists/flyrotary/List.html
</a><br></blockquote></div><br>

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