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I think I fried my CHT

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george.mueller(at)aurora.
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Posted: Thu Mar 29, 2007 6:27 am Post subject: I think I fried my CHT

I have a couple of questions about installing instruments with a Rotax 912.  I accidentally put 12 volts to my VDO CHT gauge and I think I fried it.  The needle at rest is now at the max reading.  I didn’t notice at first that the CHT gauge requires no power (except for the light) and the + terminal is for the sender.  Does anyone know if applying 12 volts to this gauge will fry it?  I called VDO tech support about 25 times and never got through. Also, I am not sure to hook up the VDO tach.  The back of the tack has a ground, power tab and one sender tab.  I hooked up the yellow and white wire from the 912 to the sender tab and the blue and white wire from the 912 to airframe ground, and have power wire and a ground wire going to the back of the tach.  I then set the DIP switch to 1=on, 2=off, 3=off.  Is this correct?  Finally, for anyone with the Skyshops FWF kit, I am not sure how to install the air filter in the cowl.  I have a bracket and an aluminum cylinder part and a strip of foam for the air filter install and I am clueless as to how this all goes together.  There is nothing on this in the Skyshops instructions. 

 

 

 

George in Milwaukee 

701 almost ready to assemble at the airport [quote][b]

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msherman95632(at)yahoo.co
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Posted: Thu Mar 29, 2007 7:13 am Post subject: I think I fried my CHT

George.

  

 Can't answer your question about the VDO gauge, but my guess is, it is history.  I'm at work now but when I get home I will forward some pictures to you of my installation.  My drawings from Skyshops show the installation.  I could fax you a copy if you have a fax machine.

  

 Mark S.

 701/912ULS,

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cscsail(at)gmavt.net
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Posted: Thu Mar 29, 2007 1:14 pm Post subject: I think I fried my CHT

George,

     I also am using VDO gages with  my 912. They have a terminal for the sender wire, and a 12 V + terminal and  a 12V ground as well as separate terminals + and ground for the  light.

     Gordon 

  

 [quote]   ---

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