From: "Matt Boiteau mattboiteau@gmail.com" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.219.173; envelope-from=mattboiteau@gmail.com
MIME-Version: 1.0
References: <list-13373989@logan.com>
In-Reply-To: <list-13373989@logan.com>
Date: Wed, 8 Jan 2020 10:17:46 -0500
Message-ID: <CAP-UEKvCkMx4shCHRtU9K8fysnLwcR6fWzMzoV-oW-1tWX5WKw@mail.gmail.com>
Subject: Re: [FlyRotary] Using the EM3's EGT/CHT inputs for reading MPX10
 pressure sensors
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary="000000000000d10030059ba265fe"

--000000000000d10030059ba265fe
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Better off using an Arduino and Bluetooth data to phone.

I was thinking of making a standalone battery unit. Maybe 4-8 pressure
inputs and 4-8 temperature channels to fine tune duct design.

I'm just not there yet in my plane to fine tune.

Any interest? Temp sensors are cheap, but pressure sensors are $15-20 each.

- Matt Boiteau

On Wed, Jan 8, 2020, 01:11 Stephen Izett stephen.izett@gmail.com <
flyrotary@lancaironline.net> wrote:

> Hi people
>
> I=E2=80=99m wondering about the possibility of using the EM3=E2=80=99s EG=
T CHT
> differential inputs to read some pressure transducer signals.
> See MPX10 specs below. I have a handful of them and I=E2=80=99m keen to r=
ead some
> pressures in the cowl in order to plan and tune cowl flaps and any change=
s
> to intake sizes.
> Its just the EM3 is already there and if not can display the data with
> some calibration it will save me building up a seperate system.
> I haven=E2=80=99t any background in thermocouples and their signal condit=
ioning.
> The MPX=E2=80=99s output (20-55mV) which appear to fit within the range o=
f K & J
> type thermocouples, but am I missing something in the amp/conditioning
> circuit in the EM3=E2=80=99s EGT and CHT inputs?
> I noted that many thermocouples have a grounded input and thermocouple
> amp/conditioning IC=E2=80=99s have reference junction temp inputs.
>
> Can any of you guys help me here?
>
> Cheers
>
> Steve Izett
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>

--000000000000d10030059ba265fe
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Better off using an Arduino and Bluetooth data to phone.<=
div dir=3D"auto"><br></div><div dir=3D"auto">I was thinking of making a sta=
ndalone battery unit. Maybe 4-8 pressure inputs and 4-8 temperature channel=
s to fine tune duct design.=C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">I&#39;m just not there yet in my plane to fine tune.</div><div di=
r=3D"auto"><br></div><div dir=3D"auto">Any interest? Temp sensors are cheap=
, but pressure sensors are <span class=3D"money">$15-20</span>=C2=A0each.<b=
r><br><div data-smartmail=3D"gmail_signature" dir=3D"auto">- Matt Boiteau <=
/div></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Wed, Jan 8, 2020, 01:11 Stephen Izett <a href=3D"mailto:steph=
en.izett@gmail.com">stephen.izett@gmail.com</a> &lt;<a href=3D"mailto:flyro=
tary@lancaironline.net">flyrotary@lancaironline.net</a>&gt; wrote:<br></div=
><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1=
px #ccc solid;padding-left:1ex">Hi people<br>
<br>
I=E2=80=99m wondering about the possibility of using the EM3=E2=80=99s EGT =
CHT differential inputs to read some pressure transducer signals.<br>
See MPX10 specs below. I have a handful of them and I=E2=80=99m keen to rea=
d some pressures in the cowl in order to plan and tune cowl flaps and any c=
hanges to intake sizes.<br>
Its just the EM3 is already there and if not can display the data with some=
 calibration it will save me building up a seperate system.<br>
I haven=E2=80=99t any background in thermocouples and their signal conditio=
ning.<br>
The MPX=E2=80=99s output (20-55mV) which appear to fit within the range of =
K &amp; J type thermocouples, but am I missing something in the amp/conditi=
oning circuit in the EM3=E2=80=99s EGT and CHT inputs?<br>
I noted that many thermocouples have a grounded input and thermocouple amp/=
conditioning IC=E2=80=99s have reference junction temp inputs.<br>
<br>
Can any of you guys help me here?<br>
<br>
Cheers<br>
<br>
Steve Izett<br>
<br>
<br>
--<br>
Homepage:=C2=A0 <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer nor=
eferrer" target=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:=C2=A0 =C2=A0<a href=3D"http://mail.lancaironline.net:81/=
lists/flyrotary/List.html" rel=3D"noreferrer noreferrer" target=3D"_blank">=
http://mail.lancaironline.net:81/lists/flyrotary/List.html</a><br>
</blockquote></div>

--000000000000d10030059ba265fe--