X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 13 Sep 2013 21:36:58 -0400 Message-ID: X-Original-Return-Path: Received: from vms173001pub.verizon.net ([206.46.173.1] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6474732 for lml@lancaironline.net; Fri, 13 Sep 2013 21:11:49 -0400 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.1; envelope-from=lancair403@verizon.net Received: from self87aab97f5d ([unknown] [96.238.69.47]) by vms173001.mailsrvcs.net (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) with ESMTPA id <0MT300IVGCMIFBT1@vms173001.mailsrvcs.net> for lml@lancaironline.net; Fri, 13 Sep 2013 20:11:07 -0500 (CDT) X-Original-Message-id: From: "William Rumburg" X-Original-To: "Lancair Mailing List" References: Subject: Replacement VMS1000 Fuel and Oil Pressure Transducers X-Original-Date: Fri, 13 Sep 2013 21:11:01 -0400 MIME-version: 1.0 Content-type: multipart/alternative; boundary="----=_NextPart_000_005D_01CEB0C5.BFF5DC90" X-Priority: 3 X-MSMail-priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 This is a multi-part message in MIME format. ------=_NextPart_000_005D_01CEB0C5.BFF5DC90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable A couple of years ago, I made a post identifying a superior -and much = lower cost- Measurement Specialties Products (MSP) transducer as a = replacement for the Honeywell MediMate transducer that the VMS 1000 = employs for fuel pressure indication. Some tried to use that same = transducer for oil pressure and reported that it didn't work, yielding a = value twice the actual oil pressure. Here's why: The 50 psi Honeywell unit that VMS employed for fuel pressure has a 50mV = full output, which equates to 1mV/psi. The 100 psi MSP unit that I = recommended has a 100mV full output, which also equates to 1mV/psi; so = it functions perfectly as a replacement for *fuel pressure*. The 100 psi Honeywell unit that VMS employs for oil pressure also has a = 50mV full output but, in this case, that equates to .5mV/psi. With it's = 1mV/psi output, the same MSP unit will not function for oil pressure; it = causes an indication double the actual oil pressure.=20 As stated in my post a couple of years ago, the Honeywell MediaMate is = older and inferior technology, prone to failure, and -at over $400- is = outrageously priced. In contrast, the MSP unit is compact, superior and = modern technology at only $120.=20 There's another, almost identical MSP unit that has a 50mV full output = and, consequently, will function perfectly for fuel and oil pressure in = it's 50 and 100 psi versions. Here's the spec sheet: = http://www.meas-spec.com/downloads/US300.pdf Problem is that the combination of it's 5VDC supply voltage and 50 mV = output is rarely utilized in industry, so there aren't now any = available. However, I contacted one of MSP's distributors and they = appear willing to place an order for the 10 unit minimum, provided that = there's interest. Let me know if you're interested, even to purchase one now for future = use if your current transducer should fail. Bill Rumburg N403WR (Sonic bOOm) =20 ------=_NextPart_000_005D_01CEB0C5.BFF5DC90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

A couple of years ago, I made a=20 post identifying a superior -and much lower cost- Measurement=20 Specialties Products (MSP) transducer as a replacement for the = Honeywell=20 MediMate transducer that the VMS 1000 employs for fuel pressure = indication. Some=20 tried to use that same transducer for oil pressure and = reported=20 that it didn't work, yielding a value twice the actual oil pressure.=20 Here's why:

The 50 psi Honeywell = unit that VMS=20 employed for fuel pressure has a 50mV full output, which equates to = 1mV/psi. The 100 psi MSP unit that I = recommended=20 has a 100mV full output, which also equates to 1mV/psi; so it functions=20 perfectly as a replacement for *fuel pressure*.

The 100 psi Honeywell unit that VMS = employs for oil=20 pressure also has a 50mV full output but, in this case, = that equates to=20 .5mV/psi. With it's 1mV/psi = output, the=20 same MSP unit will not function for oil pressure; it causes an=20 indication double the actual oil pressure.
As stated in my post a couple of years ago, the = Honeywell=20 MediaMate is older and inferior technology, prone to failure, and -at = over $400-=20 is outrageously priced. In contrast, the MSP unit is compact, superior = and=20 modern technology at only $120.

There's another, almost identical MSP = unit that has=20 a 50mV full output and, consequently, will function perfectly for = fuel and=20 oil pressure in it's 50 and 100 psi versions. Here's the spec sheet: http://www.meas-spe= c.com/downloads/US300.pdf

Problem is that the combination = of it's 5VDC=20 supply voltage and 50 mV output is rarely utilized in=20 industry, so there aren't now any available. However, I contacted = one=20 of MSP's distributors and they appear willing to place an=20 order for the 10 unit minimum, provided that there's = interest.

Let me know if you're interested, even = to purchase=20 one now for future use if your current transducer should = fail.

Bill Rumburg

N403WR (Sonic=20 bOOm)

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