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RF interference on GRT fuel pressure with PTTRF interference

 
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wstucklen1(at)cox.net
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PostPosted: Thu Dec 27, 2012 11:36 am    Post subject: RF interference on GRT fuel pressure with PTTRF interference Reply with quote

I just put in an order for their evaluation kit for four DB25 EMC units (Item # 903C). I’ve been having problems with RFI getting into the fuel pressure circuit, causing fuel pressure warnings on the EFIS engine page. I’ll put this unit onto the DB-25 on the EIS and see if it solves the issue (or makes it worst). It can’t hurt, but may not eliminate the issue is RFI getting into the fuel pressure sending unit, causing it to send the wrong information. Only a cap across it’s leads would then eliminate the problem…..

Fred Stucklen
RV-7A N924RV 800+ Hrs
Triple GRT EFIS
GRT EIS


Time:
02:23:24 PM PST US
Quote:

From:
Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)>
Quote:

Subject:
Re: RF interference on GRT fuel pressure with PTT
Quote:
Wow cool idea. I’ll be the guinea pig and report back when it’s see if it fixes the problem. Tim ________________________________ � From: ChangDriver <capav8r(at)gmail.com (capav8r(at)gmail.com)>
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tim2542(at)sbcglobal.net
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PostPosted: Thu Dec 27, 2012 2:45 pm    Post subject: RF interference on GRT fuel pressure with PTTRF interference Reply with quote

Thanks Fred, I had not gotten around to ordering yet as I recall one DB was male pin and the other female. Do you plan to put one on each connector or just the one that has the fuel pres. sensor?
Tim
Sent from my iPad

On Dec 27, 2012, at 11:35 AM, "Fred Stucklen" <wstucklen1(at)cox.net (wstucklen1(at)cox.net)> wrote:
[quote] <![endif]--> <![endif]-->
I just put in an order for their evaluation kit for four DB25 EMC units (Item # 903C). I’ve been having problems with RFI getting into the fuel pressure circuit, causing fuel pressure warnings on the EFIS engine page. I’ll put this unit onto the DB-25 on the EIS and see if it solves the issue (or makes it worst). It can’t hurt, but may not eliminate the issue is RFI getting into the fuel pressure sending unit, causing it to send the wrong information. Only a cap across it’s leads would then eliminate the problem…..

Fred Stucklen
RV-7A N924RV 800+ Hrs
Triple GRT EFIS
GRT EIS


Time:
02:23:24 PM PST US
Quote:

From:
Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)>
Quote:

Subject:
Re: RF interference on GRT fuel pressure with PTT
Quote:
Wow cool idea. I’ll be the guinea pig and report back when it’s see if it fixes the problem. Tim � ________________________________ From: ChangDriver <capav8r(at)gmail.com (capav8r(at)gmail.com)>
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wstucklen1(at)cox.net
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PostPosted: Fri Dec 28, 2012 5:29 am    Post subject: RF interference on GRT fuel pressure with PTTRF interference Reply with quote

Tim,

I ordered four units (Their evaluation kit), so will start out by trying just the sensor DB. If that doesn’t solve the problem, I’ll add one to the TEMP sensor DB input. My fear is that the actual sensor (I have the high pressure precision unit for a fuel injected engine) is being effected by the RFI. If this is the case, the signal coming from the sensor would be bad, causing the EFIS alarms. This type of problem can only be solved by protecting the sensor with capacitors.
The EMC units have male pins on one side, female on the other side, allowing them to be put in-line with the existing cable connectors…

Fred Stucklen

Time:
02:45:41 PM PST US
Quote:

Subject:
Re: RF interference on GRT fuel pressure with PTTRF
Quote:
interference on GRT fuel pressure with PTT

From:
Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)>
Quote:
Thanks Fred, I had not gotten around to ordering yet as I recall one DB was m ale pin and the other female. Do you plan to put one on each connector or ju st the one that has the fuel pres. sensor? Tim Sent from my iPad interference on GRT fuel pressure with PTT
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ale pin and the other female. Do you plan to put one on each connector or ju
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