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RV10-List:RPM indications with Lightspeed

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coop85(at)bellsouth.net
Guest

Posted: Sun Aug 06, 2006 5:23 pm Post subject: RV10-List:RPM indications with Lightspeed

I am still having trouble getting my Lightspeed RPM indication to work on my

Grand Rapids DIS and have a question.  On the output line, there are 3

options to choose from for RPM indications, analog, digital and one other (I

think, don't have the instruction handy unfortunately).  I opted for the

digital pin but am still getting 0 RPM (and I have accomplished the

resistor/capacitor removal as required).  Anyone have any other recommended

pins to use?  There may be other issues (undetected bad joint?) but I

thought I'd start here.



Thanks,

Marcus

Pseudo high-speed taxi today, it felt great!



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Tim(at)MyRV10.com
Guest

Posted: Tue Aug 08, 2006 5:13 am Post subject: RV10-List:RPM indications with Lightspeed

Marcus,



I'd start looking at the hardware being a possible cause.  You may

want to send the EIS to GRT and have them look at it.  On mine,

the tach out from the Lightspeed goes directly into the Tach in

on the GRT.  Then the only thing to screw up is the pulses per rev,

and even if you mess up you should get some reading.  There are no

resistors or things needed to do this.



Be aware though that you won't be able to easily feed the tach

info from the mag AND the lightspeed into the EIS, since they

both have different settings I think.



One other thing to check before sending the unit back....are you

SURE that you're actually firing and running on the Lightspeed?

When I do a mag check with the Lightspeed off, it'll of course

read "0" since it's not getting any input from the LSI.   Could

it be possible that your engine is only running on the mag?



Tim Olson - RV-10 N104CD - Flying

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Marcus Cooper wrote:

 	  Quote: 	
		   

 

 I am still having trouble getting my Lightspeed RPM indication to work on my

 Grand Rapids DIS and have a question.  On the output line, there are 3

 options to choose from for RPM indications, analog, digital and one other (I

 think, don't have the instruction handy unfortunately).  I opted for the

 digital pin but am still getting 0 RPM (and I have accomplished the

 resistor/capacitor removal as required).  Anyone have any other recommended

 pins to use?  There may be other issues (undetected bad joint?) but I

 thought I'd start here.

 

 Thanks,

 Marcus

 Pseudo high-speed taxi today, it felt great!

 

 Do not archive

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nevilleboyle(at)bencomm.c
Guest

Posted: Tue Aug 08, 2006 2:35 pm Post subject: RV10-List:RPM indications with Lightspeed

Marcus , To get my light speed to read rpm on my GRT EIS I needed to put

a resistor to the voltage supply in the DIN plug of the lightspeed to

the feed wire to the eis I think I used about a 10 k

            Neville 40107



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