---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 01/22/18: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:13 AM - Fuel Totalizer Circuit (sturs) 2. 04:53 AM - Re: Fuel Totalizer Circuit (user9253) 3. 09:18 AM - Re: Fuel Totalizer Circuit (sturs) 4. 09:22 AM - fuel pressure sensor (Ken Ryan) 5. 09:37 AM - Re: fuel pressure sensor (Robert L. Nuckolls, III) 6. 10:19 AM - Re: fuel pressure sensor (ashleysc@broadstripe.net) 7. 11:56 AM - Re: fuel pressure sensor (Ken Ryan) 8. 06:12 PM - Re: Fuel Totalizer Circuit (Paul Millner) ________________________________ Message 1 _____________________________________ Time: 02:13:29 AM PST US Subject: AeroElectric-List: Fuel Totalizer Circuit From: "sturs" A friend of mine is having an issue with the fuel totalizer on his aircraft. Basically it doesn't work (is dead) and seems that it may have suffered from a voltage spike whilst starting the a/c from a boost starter. Fault finding would be much easier if anyone has access to a circuit diagram of the device. Does anyone on here know where to find one? We have the user manual - but that only shows the external wiring to the power and transducer. It's a Hoskins Model FT101A. Any help would be very much appreciated. Thanks for reading this. Stuart Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477495#477495 ________________________________ Message 2 _____________________________________ Time: 04:53:38 AM PST US Subject: AeroElectric-List: Re: Fuel Totalizer Circuit From: "user9253" Download this pdf: https://img1.wsimg.com/blobby/go/5fd0aa27-961d-44f2-853d-76b9736fb4af/downloads/1bono4lcn_734052.pdf -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477496#477496 ________________________________ Message 3 _____________________________________ Time: 09:18:33 AM PST US Subject: AeroElectric-List: Re: Fuel Totalizer Circuit From: "sturs" Hi Joe, Yes, that's the one we've already got - but thanks anyway. The problem is there's clearly a fault on the circuit board somewhere - and I don't think I can find it without a circuit diagram. Cheers, Stu Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477499#477499 ________________________________ Message 4 _____________________________________ Time: 09:22:55 AM PST US From: Ken Ryan Subject: AeroElectric-List: fuel pressure sensor I have a fuel pressure sender -- UMA N1EU07D -- for my Rotax 914. It is a differential sensor that senses fuel pressure and airbox pressure, and reports the difference. The wiring that comes with the sensor is a 3 wire shielded pigtail that is about a foot long. The 3 wires are 12v power, ground and signal. To connect this to my Dynon Skyview EMS module I will need to strip it back a few inches in order to accommodate a 37 pin plug, leaving about 8 inches of shielded bundle running from the sensor housing to the 37 pin plug. None of the wires on the pre-made Dynon harness are shielded. The Dynon manual makes no mention of utilizing the shield. The shielded wire would only be about 8 inches long, or less, from the sensor to the 37 pin plug. The remainder of the run (approximately 18 inches) is unshielded. I cannot see any reason to utilize the shield that comes with the sensor. Am I correct? Thanks, Ken ________________________________ Message 5 _____________________________________ Time: 09:37:02 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: fuel pressure sensor At 11:21 AM 1/22/2018, you wrote: >I have a fuel pressure sender -- UMA=C2 N1EU07D -- >for my Rotax 914. It is a differential sensor >that senses fuel pressure and airbox pressure, and reports the difference. > >The wiring that comes with the sensor is a 3 >wire shielded pigtail that is about a foot long. >The 3 wires are 12v power, ground and signal. > >To connect this to my Dynon Skyview EMS module I >will need to strip it back a few inches in order >to accommodate a 37 pin plug, leaving about 8 >inches of shielded bundle running from the >sensor housing to the 37 pin plug. None of the >wires on the pre-made Dynon harness are >shielded. The Dynon manual makes no mention of utilizing the shield. > >The shielded wire would only be about 8 inches >long, or less, from the sensor to the 37 pin >plug. The remainder of the run (approximately 18 inches) is unshielded. > >I cannot see any reason to utilize the shield >that comes with the sensor. Am I correct? No reason to think otherwise . . . these signals are generally not vulnerable to electrostatically coupled antagonists . . . further, it's unlikely that any such antagonists will be found sharing the wire bundles. I think you can move ahead . . . Bob . . . ________________________________ Message 6 _____________________________________ Time: 10:19:23 AM PST US From: ashleysc@broadstripe.net Subject: Re: AeroElectric-List: fuel pressure sensor HiKen; HiAll; I am going to go way out on a limb here: I have a different fuel pressure sender, that is not shielded, provided by Swift that also makes gauges. There is a possibility that your manufacturer only used shielded wire because of its durability. Presuming that you have already tried to talk with the manufacturer and gotten no joy, I would try it without shielding the remainder of the run and see what happens. If that fails, you can buy shielding in flattened tubes that can be put over the unshielded bundle, connected to the sensor shield and grounded at the far end. I have some extra 3/8" ID if you want to give it a try; no charge. Cheers! Stu. ----- Original Message ----- From: "Ken Ryan" Sent: Monday, January 22, 2018 9:21:24 AM Subject: AeroElectric-List: fuel pressure sensor I have a fuel pressure sender -- UMA N1EU07D -- for my Rotax 914. It is a differential sensor that senses fuel pressure and airbox pressure, and reports the difference. The wiring that comes with the sensor is a 3 wire shielded pigtail that is about a foot long. The 3 wires are 12v power, ground and signal. To connect this to my Dynon Skyview EMS module I will need to strip it back a few inches in order to accommodate a 37 pin plug, leaving about 8 inches of shielded bundle running from the sensor housing to the 37 pin plug. None of the wires on the pre-made Dynon harness are shielded. The Dynon manual makes no mention of utilizing the shield. The shielded wire would only be about 8 inches long, or less, from the sensor to the 37 pin plug. The remainder of the run (approximately 18 inches) is unshielded. I cannot see any reason to utilize the shield that comes with the sensor. Am I correct? Thanks, Ken ________________________________ Message 7 _____________________________________ Time: 11:56:31 AM PST US From: Ken Ryan Subject: Re: AeroElectric-List: fuel pressure sensor Thanks everybody. On Mon, Jan 22, 2018 at 8:39 AM, wrote: > HiKen; > HiAll; > I am going to go way out on a limb here: I have a different fuel pressure > sender, that is not shielded, provided by Swift that also makes gauges. > There is a possibility that your manufacturer only used shielded wire > because of its durability. Presuming that you have already tried to talk > with the manufacturer and gotten no joy, I would try it without shielding > the remainder of the run and see what happens. If that fails, you can buy > shielding in flattened tubes that can be put over the unshielded bundle, > connected to the sensor shield and grounded at the far end. I have some > extra 3/8" ID if you want to give it a try; no charge. > Cheers! Stu. > > ------------------------------ > *From: *"Ken Ryan" > *To: *aeroelectric-list@matronics.com > *Sent: *Monday, January 22, 2018 9:21:24 AM > *Subject: *AeroElectric-List: fuel pressure sensor > > I have a fuel pressure sender -- UMA N1EU07D -- for my Rotax 914. It is a > differential sensor that senses fuel pressure and airbox pressure, and > reports the difference. > > The wiring that comes with the sensor is a 3 wire shielded pigtail that is > about a foot long. The 3 wires are 12v power, ground and signal. > > To connect this to my Dynon Skyview EMS module I will need to strip it > back a few inches in order to accommodate a 37 pin plug, leaving about 8 > inches of shielded bundle running from the sensor housing to the 37 pin > plug. None of the wires on the pre-made Dynon harness are shielded. The > Dynon manual makes no mention of utilizing the shield. > > The shielded wire would only be about 8 inches long, or less, from the > sensor to the 37 pin plug. The remainder of the run (approximately 18 > inches) is unshielded. > > I cannot see any reason to utilize the shield that comes with the sensor. > Am I correct? > > Thanks, > > Ken > > ________________________________ Message 8 _____________________________________ Time: 06:12:56 PM PST US Subject: Re: AeroElectric-List: Fuel Totalizer Circuit From: Paul Millner Don't have the diagram, but I think I have a removed-good unit in my hangar... Paul On 1/22/2018 2:12 AM, sturs wrote: > > A friend of mine is having an issue with the fuel totalizer on his aircraft. Basically it doesn't work (is dead) and seems that it may have suffered from a voltage spike whilst starting the a/c from a boost starter. > > Fault finding would be much easier if anyone has access to a circuit diagram of the device. Does anyone on here know where to find one? We have the user manual - but that only shows the external wiring to the power and transducer. It's a Hoskins Model FT101A. > > Any help would be very much appreciated. Thanks for reading this. > > Stuart > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=477495#477495 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.