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Where to install the hall effect sensor

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avtveld(at)tiscali.nl
Guest

Posted: Sat May 20, 2006 10:50 am Post subject: Where to install the hall effect sensor

Guys,



I have read all available info in the list on the Hall effect sensor to

measure currents but would like some detailed input and pro's and cons on

the different positions where to put these sensors, be it over battery

cables, bus feeders or alternator b-leads. Your help is appreciated!



 



Aart van't Veld, RV7, wiring

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klehman(at)albedo.net
Guest

Posted: Sat May 20, 2006 12:31 pm Post subject: Where to install the hall effect sensor

Hi Aart

FWIW I put one on the main b-lead. It lets me see how hard the 

alternator is working and it still confirms various items are working 

(drawing current) similar to the way it would if on the main bus feeder. 

I quickly learned to tell how much charging current is going into the 

battery by subtracting the normal running loads from the reading. I'd 

put it in the same place if doing it again.

Ken



Aart van't Veld wrote:



 	  Quote: 	
		  



Guys,



I have read all available info in the list on the Hall effect sensor to

measure currents but would like some detailed input and pro's and cons on

the different positions where to put these sensors, be it over battery

cables, bus feeders or alternator b-leads. Your help is appreciated!



 



Aart van't Veld, RV7, wiring

- 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:

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Sun May 21, 2006 8:48 pm Post subject: Where to install the hall effect sensor

On May 20, 2006, at 11:40 AM, Aart van't Veld wrote:



 	  Quote: 	
		   

 <avtveld(at)tiscali.nl>



 Guys,



 I have read all available info in the list on the Hall effect  

 sensor to

 measure currents but would like some detailed input and pro's and  

 cons on

 the different positions where to put these sensors, be it over battery

 cables, bus feeders or alternator b-leads. Your help is appreciated!


	


Well, there are three basic places you can put a current sensor  

(shunt or hall-effect):



1. alternator B-lead (current source);



2. battery lead (current sink on charge or source on discharge);



3. bus feed (current sink).



If you want the whole picture you need at least two. If you know what  

the alternator is producing and what the loads are consuming, the  

difference is what is going into (or coming out of) the battery. If  

you know what is going into the battery and coming out of the  

alternator, the difference is what is being consumed in your loads.  

If you have only one sensor you don't have enough information.



And of course this gets a bit more complex with multiple busses,  

multiple alternators, and multiple batteries but the basic statements  

above remain relevant.



But if I could have only one current sensor it would be in the B-lead  

as an alternator load meter. By watching my load start higher and  

then drop off, I know the battery is charging. I can also use it to  

see what each load draws by turning loads on and off. It will also  

tell you if you are working your alternator too hard.



But don't forget your voltmeter. That is more important than the  

ammeter.



Brian Lloyd                         361 Catterline Way

brian-yak AT lloyd DOT com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

 Antoine de Saint-Exupry

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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

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