Return-Path: <13brv3@bellsouth.net> Received: from imf18aec.mail.bellsouth.net ([205.152.59.66] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3137776 for flyrotary@lancaironline.net; Wed, 31 Mar 2004 00:26:46 -0500 Received: from rad ([65.0.151.4]) by imf18aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040331051620.NKBH1781.imf18aec.mail.bellsouth.net@rad> for ; Wed, 31 Mar 2004 00:16:20 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Rusty's O2 / EM2 problems. Date: Tue, 30 Mar 2004 23:18:24 -0600 Message-ID: <004401c416df$97bef9d0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0045_01C416AD.4D2489D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0045_01C416AD.4D2489D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Rusty, I tested a new mixture monitor (small 2" instrument) and found = that bar 5 (first green bar) comes on at .546 v which is what I would = expect. Bar 10 (second red bar at top) came on at 1.1V. This sanity checks with what I found when I used this meter in that bar 10 would usually not = light even at very rich mixtures. The EM2 was calibrated to be full scale at about .950 V. =20 =20 I'm stick'n to my story. Full output on O2 sensors is 1 V. Don't = know where your problem is but this should point you in the right direction. = =20 Tracy=20 =20 Thanks for checking that Tracy. My mixture monitor lights the 5th bar = at .85V, and the 10th bar lights at 1.4V. The EM-2 works exactly as you described, with essentially one step per tenth of a volt, giving full deflection at 1.0V. I also looked up the specs for O2 sensors, and = found that they are indeed supposed to be from 0-1V. =20 When I used this mixture monitor on the rev-1 version, I could adjust = the mixture knob for full scale readings in each direction, so I can't see = how it would have been possible for the O2 sensor to light the upper bars. = The only explanation is that something has gone wrong with my mixture = monitor since I last used it. I'll be testing that theory very soon, because = I'll be installing it temporarily with it's own wire to the O2 sensor. I'll = be able to run either, or both together for testing. =20 I'm also starting to wonder if I got a bad O2 sensor, which is causing = my EM-2 to show me bad data. Since the EM-2 is calibrated exactly as it = should be, that only leaves a bad sensor. I probably won't get to do anything = with it tomorrow, so you can forget about answering the phone, and get back = to that fiberglass we love so much :-) =20 Cheers, Rusty =20 =20 =20 ------=_NextPart_000_0045_01C416AD.4D2489D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Rusty, I tested a new mixture monitor (small = 2"=20 instrument) and found that bar 5 (first green bar) comes on at .546 = v =20 which is what I would expect.  Bar 10 (second red bar at top) came = on at=20 1.1V.  This sanity checks with what I found when I used this meter = in that=20 bar 10 would usually not light even at very rich mixtures.   = The EM2=20 was calibrated to be full scale at about .950 V.  =20
 
 I'm stick'n=20 to my story.  Full output on O2 sensors is 1 V.   Don't = know=20 where your problem is but this should point you in the right = direction. =20
 
 Tracy 
 
Thanks for checking that Tracy.  = My mixture=20 monitor lights the 5th bar at .85V, and the 10th bar lights at = 1.4V.  The=20 EM-2 works exactly as you described, with essentially one step per tenth = of a=20 volt, giving full deflection at 1.0V.  I also looked up the specs = for O2=20 sensors, and found that they are indeed supposed to be from=20 0-1V.
 
When I used this mixture monitor on the = rev-1 version,=20 I could adjust the mixture knob for full scale readings in each = direction,=20 so I can't see how it would have been possible for the O2 sensor to = light the=20 upper bars.  The only explanation is that = something has gone=20 wrong with my mixture monitor since I last used it.  I'll be = testing=20 that theory very soon, because I'll be installing it temporarily = with it's=20 own wire to the O2 sensor.  I'll be able to run either, or both = together=20 for testing.
 
I'm also starting to wonder if I got a bad O2 = sensor, which=20 is causing my EM-2 to show me bad data.  Since the EM-2 is = calibrated=20 exactly as it should be, that only leaves a bad sensor.  I probably = won't=20 get to do anything with it tomorrow, so you can forget about answering = the=20 phone, and get back to that fiberglass we love so much=20 :-)
 
Cheers,
Rusty
    
 
 
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