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
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Subject: | Fuel Totalizer Circuit |
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
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Subject: | Re: Fuel Totalizer Circuit |
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
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Subject: | Re: Fuel Totalizer Circuit |
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
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Subject: | 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
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Subject: | Re: 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
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Subject: | Re: 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" <keninalaska@gmail.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 7
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Subject: | Re: fuel pressure sensor |
Thanks everybody.
On Mon, Jan 22, 2018 at 8:39 AM, <ashleysc@broadstripe.net> 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" <keninalaska@gmail.com>
> *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
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Subject: | Re: Fuel Totalizer Circuit |
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
>
>
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