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Date: Fri, 11 Jan 2008 22:03:09 -0700
From: Bob White <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: General OAT Wiring Question
Message-Id: <20080111220309.d448de95.bob@bob-white.com>
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One other thing, the EM2 does a TAS calculation, so if you use the
temp input for something else, that's not going to come out right.  I
never did use that feature and forgot about it (until just after I hit
the send button).  There might be some other side effects (CYA or in
this case CMA).

Bob W.


On Fri, 11 Jan 2008 21:58:30 -0700
Bob White <bob@bob-white.com> wrote:

> Hi Doug,
> 
> Trying to connect the single temperature sensor to two instruments
> isn't likely to work.  There are several different types of devices used
> for measuring temperature.  The EM2 is supplying 5V to the EM2 sensor,
> and you don't want to be connecting voltage sources from two different
> instruments together.  I have no idea what the RMI is using but
> connecting them together isn't a good idea.
> 
> You can still use the EM2 sensor to measure whatever you like.  Just
> remember that the OAT reading on the EM2 is something else and read OAT
> only on the RMI.
> 
> The EC2 temperature sensor must be used to measure the air intake for
> the combustion air as that temperature affects your mixture.
> 
> Bob W.
> 
> 
> 
> On Fri, 11 Jan 2008 22:58:26 EST
> DLOMHEIM@aol.com wrote:
> 
> > I have a Rocky Mountain Instruments Uencoder in my panel and already have  an 
> > OAT temperature sender associated with that; so I was wondering if I could  
> > just run a "Y" from that shielded wire when it gets to my panel with one lead  
> > going to the RMI and the other to my EM2 for OAT display.  My  possible 
> > concern would be if this might cause some unacceptable errors in the  temperature 
> > measurement.  
> >  
> > If is feasible to do this it would allow me to use the OAT sensor  that came 
> > with the EM2 for other tasks such as sampling the air temp coming  out of the 
> > radiators, etc.  
> >  
> > Doug Lomheim
> > RV-9A, 13B
> > OK City, OK
> > 
> > 
> > 
> > **************Start the year off right.  Easy ways to stay in shape.     
> > http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489
> > 
> 
> 


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