Matronics Email Lists :: View topic - Aux power to learn avionics

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Aux power to learn avionics

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

phil(at)hdmnet.com
Guest

Posted: Mon Aug 01, 2016 3:36 pm Post subject: Aux power to learn avionics

Forgive my naive question which has probably been addressed before on this list.  I did search before posting.

I have purchased a 2001 Cessna T182T.  To learn all the systems on the ground I purchased a Schauer JAC2024H battery charger from Aircraft Spruce, with the typical Cessna plug for external power.  

I hooked it up, turned on the charger, turned on master, then avionics and sat there studying for a bout 10 minutes when I noticed that the battery voltage was graducally dropping.    I fear I was actually draining the main battery which is getting close to replacement time.  



Am I doing something wrong?  



I have also purchased a battery minder for continuous, low voltage charging to keep the battery healthy.  Advise will be much appreciated.



-- 



-- 

Phil Hooper

President

           Harvest Development           & Media Inc.

         19851 Yorba Linda           Blvd., Suite 204

           Yorba Linda, CA 92886           

voice:             714.693.8745

fax:              714.777.0134

             web: http://www.hdmnet.com/

             email: phil(at)hdmnet.com (phil(at)hdmnet.com)

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Mon Aug 01, 2016 3:52 pm Post subject: Re: Aux power to learn avionics

I do not know why, but Aircraft Spruce's description says,

 	  Quote: 	
		  "Not intended for use as a DC power supply." 	


Without knowing how the Cessna is wired, all I can suggest is to connect the charger directly to the battery to see if that makes a difference.

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores

recapen(at)earthlink.net
Guest

Posted: Mon Aug 01, 2016 4:04 pm Post subject: Aux power to learn avionics

The system that you had turned on was drawing more than the 20 amps that the charger was able to produce.



If you are going to run your stuff for an extended period, you need a power supply capable of mainlining a set voltage with the amount of current flowing.



In my RV6A, I can use a good portion of my avionics with a 30 AMP power supply and maintain voltage sufficient to not discharge the battery.



Right or wrong is not the answer here - with a 20A charger, you have too much stuff turned on for the charger to keep up.



--

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

rampil

Joined: 04 May 2007
Posts: 870

Posted: Wed Aug 03, 2016 5:51 am Post subject: Re: Aux power to learn avionics

BTW, Batteries are made to be drained!

No harm, no foul! You just need to recharge your lead acid battery

when you are done studying. Discharging your battery to the point where

your avionics quits (probably about 10 volts(here I am guessing that the avionics is universal 12-24 compatible)) will not harm the battery.

Some avionics (with poor design) may complain more. 



And yes, The voltage was probably declining due to current draw in 

excess of charger supply

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Ira N224XS

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum