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Dual Alternator Question

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jfolkerts1(at)gmail.com
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Posted: Sun Oct 26, 2014 5:26 am Post subject: Dual Alternator Question

I’m planning on the Z-12 dual alternator single battery installation.  I have a VMC-1000 engine monitor and believe it only displays one alternator output.  Can I use a simple switch to add the B&C 20 Amp Vacuum Pad alternator so I can check it periodically or should I add another ammeter?  Would the switch create enough resistance to throw off the readings on the display?

Thanks,

Jerry Folkerts

  [quote][b]

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nuckolls.bob(at)aeroelect
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Posted: Sun Oct 26, 2014 8:46 am Post subject: Dual Alternator Question

At 08:25 2014-10-26, you wrote:

 	  Quote: 	
		  I'm planning on the Z-12 dual alternator single battery 

installation.  I have a VMC-1000 engine monitor and believe it only 

displays one alternator output.  Can I use a simple switch to add 

the B&C 20 Amp Vacuum Pad alternator so I can check it periodically 

or should I add another ammeter?  Would the switch create enough 

resistance to throw off the readings on the display?


	


   If the VM1000 uses a hall-effect transducer, run BOTH

   B-leads through the same transducer. The display will

   show alternator load for the device presently in service.



   However, since the SD-20 is a stand-by alternator fitted

   with a dedicated hall-effect load sensing and indication

   system, bringing alternator load numbers to the panel

   offers no in formation of use to the pilot while in

   flight.

   Bob . . .

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RV7ASask

Joined: 25 Jan 2006
Posts: 36

Posted: Sun Oct 26, 2014 4:16 pm Post subject: Re: Dual Alternator Question

I am operating a Z12 electrical system in my RV7A and have been very pleased, 200+ hours. The aircraft has recently been certified IFR. It has a Dynon Skyview and a simple switch on the panel to show volts and amps of the alternator selected. Lights on the panel indicate the status of the two alternators.



David Lamb

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