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billhuntersemail(at)gmail
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 Posted: Tue May 16, 2017 6:46 am Post subject: WestTack (Westberg Manufacturing) Fuel Probe Power Consumpti |
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Does anyone have a copy of the instruction manual for this WesTack unit?
My airplane has the Westack capacitance fuel probes and I am trying to figure out how much power two units would consume and if I can use the Dynon Skyview PIN 15.
The instruction sheet I found online (attached) discusses the installation of the probes however it is really lacking on electrical hookup.
..
Cheers!!!
Bill Hunter
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N77LY_EQUIPMENT_FUEL_PROBE_Westberg_Capacitance.docx |
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Tue May 16, 2017 9:59 am Post subject: Re: WestTack (Westberg Manufacturing) Fuel Probe Power Consu |
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The trade name is Westach, not WestTack
Capacitive fuel level probes are pretty much passive devices that do not
consume power (aside from perhaps a tiny amount through dielectric leakage)
An RF voltage is applied to the probe and the capacitance is measured across
the electrodes.
There is no polarity to these electrodes and so there is really nothing to say
about how to hook it up, the two wires go into the monitor box.
The issue of compatibility is one of measurable range of capacitance in the
measuring box, most are adjustable, maybe not all. The capacitance of the
probe in fuel is a function of probe geometry and immersed level of fuel
(assuming you never switch to auto gas).
Your best bet is to call dynon and ask if their box can adjust to the Westach
probe.
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user9253
Joined: 28 Mar 2008
Posts: 1925
Location: Riley TWP Michigan
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| Posted: Tue May 16, 2017 3:41 pm Post subject: Re: WestTack (Westberg Manufacturing) Fuel Probe Power Consu |
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The Dynon SkyView installation manual on page 7-49 states, " | Quote: | Capacitive fuel level sensors are only supported on pins 8, 22, 23, and 31 on the SV-EMS-
220/221 D37. Capacitive sensors must output a variable voltage within the ranges of 0-5 volts DC." |
The Westach document that you linked states that its output is 0 to 5 VDC.
The two units should be compatible.
Like rampil posted, best bet is to call Dynon support.
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billhuntersemail(at)gmail
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| Posted: Tue May 16, 2017 4:34 pm Post subject: WestTack (Westberg Manufacturing) Fuel Probe Power Consumpti |
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Thanks Joe and Rampil,
The probes were working on the previous installation and I was happy with
the system however I am doing a complete rewire and the previous setup had a
2 AMP CB that provided the power to the probes. I since realized that the
EMS PIN 18 is a 12 VDC power source and it was powering a FLOSCAN 201B fuel
flow sensor.
If the Flowscan plus the two capacitance probes are less than the 80
miliamps that the pin can provide I want to power the probes with the PIN 15
so then I do not have to have the battery master on should I want to check
the fuel levels.
THANKS AGAIN!!!
Bill Hunter
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