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Schumacher 1562 Redux

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Sep 19, 2012 4:28 pm Post subject: Schumacher 1562 Redux

I've been trying to get this message to post all day.

    It had an embedded .jpg capture from Photoshop in

    it which may be sticking in the craw of Matt's spam

    filters. In any case, here 'tis again but with the

    data plot posted to the website.



    I picked up a new Schumacher 1562 at the Pratt Walmart

    on my way back to M.L. Monday. I connected it to the same

    SVLA battery we used to explore Battery Tender performance

    a few days ago. Here's the recharge profile



http://tinyurl.com/d8yc8rw



   It's interesting to note that the charger spent nearly as

   much time in the top-off as bulk-charge mode.



   It will be interesting see what the next few cycles look

   like. I just put the battery on 1.2A discharge to measure

   it's energy content. Watch this space . . .



   Bob . . .

jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Thu Sep 20, 2012 8:09 am Post subject: Schumacher XC-10

Bob, 

The "Schumacher 1562 redux" thread got my attention (your charge profile plot) because recently, I accidentally (Pitot Heat) discharged my Odyssey PC 680 to 7.5 volts. I used my Schumacher XC-10 to revive it, but I noticed that the charge voltage was 15.7v.

Odyssey says should be < 15 v to avoid boiling the batt and causing vents to open. The  batt got warm under charge, but never hot.

Just wondering if the 15.7v fried something that I should be aware of and How I might go about modifying the charger in some way to prevent the over-voltage if it's an issue.



Worry warting prior to first flight,

John

nuckolls.bob(at)aeroelect
Guest

Posted: Thu Sep 20, 2012 11:54 am Post subject: Schumacher 1562 Redux

At 11:09 AM 9/20/2012, you wrote:

 	  Quote: 	
		  



Bob,

The "Schumacher 1562 redux" thread got my attention (your charge 

profile plot) because recently, I accidentally (Pitot Heat) 

discharged my Odyssey PC 680 to 7.5 volts. I used my Schumacher 

XC-10 to revive it, but I noticed that the charge voltage was 15.7v.

Odyssey says should be < 15 v to avoid boiling the batt and causing 

vents to open. The  batt got warm under charge, but never hot.

Just wondering if the 15.7v fried something that I should be aware 

of and How I might go about modifying the charger in some way to 

prevent the over-voltage if it's an issue.


	


   All I know about the XC-10 doesn't give me a clue

   as to why you saw that kind of voltage on the battery.

   It's a Schumacher product with a list of software

   controlled features. Have you dump and cap-checked

   the battery since the questionable run-in with

   the charger?



   Bob . . .

jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Wed Oct 10, 2012 8:07 am Post subject: Schumacher XC-10 @ 15.7v -Was: Schumacher 1562 Redux

 	  nuckolls.bob(at)aeroelect wrote: 	
		  At 11:09 AM 9/20/2012, you wrote:

 	  Quote: 	
		  



Bob,

The "Schumacher 1562 redux" thread got my attention (your charge 

profile plot) because recently, I accidentally (Pitot Heat) 

discharged my Odyssey PC 680 to 7.5 volts. I used my Schumacher 

XC-10 to revive it, but I noticed that the charge voltage was 15.7v.

Odyssey says should be < 15 v to avoid boiling the batt and causing 

vents to open. The  batt got warm under charge, but never hot.

Just wondering if the 15.7v fried something that I should be aware 

of and How I might go about modifying the charger in some way to 

prevent the over-voltage if it's an issue.



	


   All I know about the XC-10 doesn't give me a clue

   as to why you saw that kind of voltage on the battery.

   It's a Schumacher product with a list of software

   controlled features. Have you dump and cap-checked

   the battery since the questionable run-in with

   the charger?



   Bob . . . 	




I have not cap checked the battery (no time recently), but it seems to be performing fine. Need to construct "poor man's cap checker".

Topping off the battery recently, I monitored the voltage rise and sure enough, the XC-10 crept up to over 15 v again and I shut it down.

rparigoris

Joined: 24 Nov 2009
Posts: 780

Posted: Wed Oct 10, 2012 8:32 am Post subject: Schumacher 1562 Redux

Hi jonlaury 

 	"monitored the voltage rise and sure enough, the XC-10 crept up to over 15 v again and I shut it down." 

 	Curious, did you ever check to make sure your volt meter is telling the truth? 

 	Ron Parigoris 

 	  

 	     [quote][b]

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Oct 10, 2012 11:17 am Post subject: Schumacher 1562 Redux

At 11:31 AM 10/10/2012, you wrote:



 	  Quote: 	
		  Hi jonlaury



"monitored the voltage rise and sure enough, the XC-10 crept up to 

over 15 v again and I shut it down."



Curious, did you ever check to make sure your volt meter is telling the truth?



Ron Parigoris


	


   Good question!



   Jon, if you find that this charger is indeed

   'topping off' at over 15 volts, I'd like to

   put my hands on it. I'd pay postage both ways

   to run some tests on it here.



   In the mean time, don't charge off and build the

   'po boy's cap checker yet. I've got a new cap

   checker module in development.  I'm taking the

   software requirements and development tools

   to my byte thrashing guru in the morning.



   In the mean time, let's see if we can figure

   out what's up with the charger you have.



   BTW . . . I pitched a Schumacher 2500 in the

   trash yesterday. I've had it for 6-7 years.

   I think it was working okay the last time I

   had occasion to use it in Wichita . . . perhaps

   4 years ago. Didn't work yesterday. Fooey . . .



   Bob . . .

jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Wed Oct 10, 2012 3:03 pm Post subject: Re: Schumacher 1562 Redux

[quote="rparigoris"]Hi jonlaury 

 	 did you ever check to make sure your volt meter is telling the truth? 

 	Ron Parigoris 

 	  

 	      	  Quote: 	
		  [b] 	




Ron,

That would spoil my fun of spending a day hunting up parts to make something that I don't need. 



Actually I have checked it against the ships volt meter. IIRC, that's how I noticed the problem.



John

jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Wed Oct 10, 2012 3:17 pm Post subject: Re: Schumacher 1562 Redux

 	  nuckolls.bob(at)aeroelect wrote: 	
		  At 11:31 AM 10/10/2012, you wrote:

   Jon, if you find that this charger is indeed

   'topping off' at over 15 volts, I'd like to

   put my hands on it. I'd pay postage both ways

   to run some tests on it here. 	




Happy to oblige. Do you think that you can tweak it so that it's useable again? Got it from Walmart about 6 mos ago for $40. Don't know what Schumacher's warranty is but my receipt has long since vanished and I doubt that Walmart will take my word for it.



John

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Oct 10, 2012 6:03 pm Post subject: Schumacher 1562 Redux

At 06:17 PM 10/10/2012, you wrote:

 	  Quote: 	

nuckolls.bob(at)aeroelect wrote:

 > At 11:31 AM 10/10/2012, you wrote:

 >

 >

 >    Jon, if you find that this charger is indeed

 >    'topping off' at over 15 volts, I'd like to

 >    put my hands on it. I'd pay postage both ways

 >    to run some tests on it here.

Happy to oblige. Do you think that you can tweak it so that it's 

useable again? Got it from Walmart about 6 mos ago for $40. Don't 

know what Schumacher's warranty is but my receipt has long since 

vanished and I doubt that Walmart will take my word for it.

   Let's see if it has forgotten how to sing and dance.

   Walmart might surprise you . . . especially if you

   want to exchange it.

   Bob . . .

nuckolls.bob(at)aeroelect
Guest

Posted: Thu Oct 11, 2012 3:54 am Post subject: Schumacher 1562 Redux

 	  Quote: 	
		  >  Don't know what Schumacher's warranty is . . .


	


  The Schumacher website cites a 5 yr warranty.

   Bob . . .

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