Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3140293 for flyrotary@lancaironline.net; Thu, 01 Apr 2004 08:14:30 -0500 Received: from rad ([65.0.137.61]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040401131430.AUB1763.imf25aec.mail.bellsouth.net@rad> for ; Thu, 1 Apr 2004 08:14:30 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Rusty's O2 / EM2 problems. Date: Thu, 1 Apr 2004 07:16:35 -0600 Message-ID: <00e001c417eb$8f4f0350$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00E1_01C417B9.44B49350" 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_00E1_01C417B9.44B49350 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable On mine max rich is around 1.0 volts, mids scale gives me around = 0.45-0.6 volts, low end drops off around 0.1.5 - 0.2 volts.=20 =20 Thanks Ed. That is, of course, exactly what it should read. The next = step is to temporarily re-install the old mixture gauge, and compare it to = the EM-2. I will also measure the O2 sensor voltage at the same time. I = may even pick up another O2 sensor, just in case.=20 =20 Is the O2 sensor you are using a heated 3/4 wire unit? If so I am = wondering whether you might possibly have a ground loop feeding heater voltage = onto your sensor lead? =20 =20 Good thought, but it's just the cheap single wire unit that Tracy and = Finn are both using. =20 =20 Thanks, Rusty (mourning the loss of my 6 months paid severance vacation)=20 ------=_NextPart_000_00E1_01C417B9.44B49350 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
On mine max rich is around 1.0 volts, mids scale = gives me=20 around 0.45-0.6 volts, low end drops off around 0.1.5 - 0.2 volts. 
 
Thanks Ed.  That is, of course, exactly what it should = read. =20 The next step is to temporarily re-install the old mixture gauge, = and=20 compare it to the EM-2.  I will also measure the O2 sensor voltage = at the=20 same time.   I may even pick up another O2 sensor, just in=20 case. 
 
Is the O2 sensor you are using a heated 3/4 wire = unit?  If so I am wondering whether you might possibly have a = ground loop=20 feeding heater voltage onto your sensor lead?
 
 
Good=20 thought, but it's just the cheap single wire unit that Tracy and Finn = are both=20 using.  
 
Thanks,
Rusty=20 (mourning the loss of my 6 months paid severance=20 vacation) 
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