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External
Since: Apr 28, 2004
Posts: 3
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(Msg. 1) Posted: Wed Apr 28, 2004 8:10 pm
Post subject: Re-charging Battery
Archived from groups: rec>boats>building (more info?)
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External
Since: Jun 22, 2003
Posts: 409
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(Msg. 2) Posted: Wed Apr 28, 2004 10:06 pm
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
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On Wed, 28 Apr 2004 17:10:03 GMT, "Ivan Young" <Ivan.DeleteThis@hotmail.com>
wrote:
>How do I check whether my outboard (Mercury 40hp) re-charging the battery or
>not?
>Thanks for the suggestions.
>
Checking the battery volts should show a slight rise when the OB is
charging. It probably gives out just a few amps, so it won't leap
from 12.6 all the way to 13.8 volt - just up a little...
Brian W<!-- ~MESSAGE_AFTER~ --> |
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External
Since: Jul 30, 2003
Posts: 82
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(Msg. 3) Posted: Wed Apr 28, 2004 11:08 pm
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
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Ivan Young wrote:
> How do I check whether my outboard (Mercury 40hp) re-charging the battery or
> not?
> Thanks for the suggestions.
>
>
after the motor has been started, you can put an ammeter in the battery
lead, it should show current flowing INTO the battery.
do this after starting the motor, otherwise you can damage the ammeter,
or blow the fuse (if it is so equipped)
--
the most committed always win<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jun 30, 2003
Posts: 125
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(Msg. 4) Posted: Thu Apr 29, 2004 4:17 am
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
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> How do I check whether my outboard (Mercury 40hp) re-charging the battery
or
> > not?
A DC voltmeter.
Anything above 12.6 VDC with the engine running and the battery is being
charged.
HTH
--
Lew
S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Visit: <http://home.earthlink.net/~lewhodgett> for Pictures<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jan 07, 2004
Posts: 813
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(Msg. 5) Posted: Thu Apr 29, 2004 11:57 am
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
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On Wed, 28 Apr 2004 20:08:22 -0500, dazed and confuzed
<dedmann RemoveThis @netnitco.net> wrote:
>do this after starting the motor, otherwise you can damage the ammeter,
>or blow the fuse (if it is so equipped)
==========================================
This is an excellent way to burn out the diodes in your charging
system if you have any.
Not recommended in my book.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jul 30, 2003
Posts: 82
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(Msg. 6) Posted: Thu Apr 29, 2004 7:34 pm
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
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Wayne.B wrote:
> On Wed, 28 Apr 2004 20:08:22 -0500, dazed and confuzed
> <dedmann DeleteThis @netnitco.net> wrote:
>
>
>>do this after starting the motor, otherwise you can damage the ammeter,
>>or blow the fuse (if it is so equipped)
>
>
> ==========================================
>
> This is an excellent way to burn out the diodes in your charging
> system if you have any.
>
> Not recommended in my book.
>
not saying you are wrong, but why do you say that?
--
the most committed always win<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jan 07, 2004
Posts: 813
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(Msg. 7) Posted: Sat May 01, 2004 2:51 am
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed
<dedmann RemoveThis @netnitco.net> wrote:
>> ==========================================
>>
>> This is an excellent way to burn out the diodes in your charging
>> system if you have any.
>>
>> Not recommended in my book.
>>
>not saying you are wrong, but why do you say that?
==============================================
If you open up the circuit while it is under load the voltage can (and
frequently does) rise to the point where the Peak Inverse Voltage
rating of the diodes is exceeded, and the junction permantently fails.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jul 30, 2003
Posts: 82
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(Msg. 8) Posted: Sat May 01, 2004 11:23 am
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Wayne.B wrote:
> On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed
> <dedmann RemoveThis @netnitco.net> wrote:
>
>>>==========================================
>>>
>>>This is an excellent way to burn out the diodes in your charging
>>>system if you have any.
>>>
>>>Not recommended in my book.
>>>
>>
>>not saying you are wrong, but why do you say that?
>
> ==============================================
>
> If you open up the circuit while it is under load the voltage can (and
> frequently does) rise to the point where the Peak Inverse Voltage
> rating of the diodes is exceeded, and the junction permantently fails.
>
for the few seconds required to place an ameeter in the circuit?
Perhaps. But I doubt it.
Your mileage may vary.
B
--
the most committed always win<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jun 22, 2003
Posts: 409
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(Msg. 9) Posted: Sat May 01, 2004 4:28 pm
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Sat, 01 May 2004 08:23:18 -0500, dazed and confuzed
<dedmann RemoveThis @netnitco.net> wrote:
>Wayne.B wrote:
>>
>> If you open up the circuit while it is under load the voltage can (and
>> frequently does) rise to the point where the Peak Inverse Voltage
>> rating of the diodes is exceeded, and the junction permantently fails.
>>
>for the few seconds required to place an ameeter in the circuit?
>Perhaps. But I doubt it.
>
>Your mileage may vary.
>B
Wayne spoke wisely - it takes about 5 microseconds maybe less of
reverse overvolts - it's not a slow thermal process
Brian W<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Mar 19, 2004
Posts: 11
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(Msg. 10) Posted: Sat May 01, 2004 4:28 pm
Post subject: Re: Re-charging Battery [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Brian Whatcott wrote:
> On Sat, 01 May 2004 08:23:18 -0500, dazed and confuzed
> <dedmann.DeleteThis@netnitco.net> wrote:
>
>
>>Wayne.B wrote:
>>
>>>If you open up the circuit while it is under load the voltage can (and
>>>frequently does) rise to the point where the Peak Inverse Voltage
>>>rating of the diodes is exceeded, and the junction permantently fails.
>>>
>
>
>>for the few seconds required to place an ameeter in the circuit?
>>Perhaps. But I doubt it.
>>
>>Your mileage may vary.
>>B
>
>
> Wayne spoke wisely - it takes about 5 microseconds maybe less of
> reverse overvolts - it's not a slow thermal process
>
> Brian W
>
if you say so.
--
the most committed always win >> Stay informed about: Re-charging Battery |
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External
Since: Jan 14, 2004
Posts: 53
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(Msg. 11) Posted: Sun May 02, 2004 12:07 am
Post subject: Re: Re-charging Battery - Believe Him [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I have seen this failure an a number of occasions.
Yes - It happens -NOW- in much less time than a human can respond.
Several conpanies (most notably F.W. Bell - also marketed by Fluke) sell
DC clamp on current probes. I have one just for this sort of thing, but
they are expensive and delicate.
A cheap and practical alternative is available at
J C Whitney <a style='text-decoration: underline;' href="http://www.jcwhitney.com" target="_blank">http://www.jcwhitney.com</a>
an inductive ammeter (they call it a current indicator)
Their SKU ZX179446X
It is just about a spring load compass that you hold near the wire, but
they do work and can get you headed in the right direction (no pun
intended). I used one for years diagnosing car electric problems.
Matt Colie
Wayne.B wrote:
> On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed
> <dedmann.DeleteThis@netnitco.net> wrote:
>
>>>==========================================
>>>
>>>This is an excellent way to burn out the diodes in your charging
>>>system if you have any.
>>>
>>>Not recommended in my book.
>>>
>>
>>not saying you are wrong, but why do you say that?
>
> ==============================================
>
> If you open up the circuit while it is under load the voltage can (and
> frequently does) rise to the point where the Peak Inverse Voltage
> rating of the diodes is exceeded, and the junction permantently fails.
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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External
Since: Jul 30, 2003
Posts: 82
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(Msg. 12) Posted: Sun May 02, 2004 2:08 am
Post subject: Re: Re-charging Battery - Believe Him [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Matt Colie wrote:
> I have seen this failure an a number of occasions.
> Yes - It happens -NOW- in much less time than a human can respond.
> Several conpanies (most notably F.W. Bell - also marketed by Fluke) sell
> DC clamp on current probes. I have one just for this sort of thing, but
> they are expensive and delicate.
>
> A cheap and practical alternative is available at
<font color=purple> > J C Whitney <a style='text-decoration: underline;' href="http://www.jcwhitney.com</font" target="_blank">http://www.jcwhitney.com</font</a>>
> an inductive ammeter (they call it a current indicator)
> Their SKU ZX179446X
>
> It is just about a spring load compass that you hold near the wire, but
> they do work and can get you headed in the right direction (no pun
> intended). I used one for years diagnosing car electric problems.
>
> Matt Colie
>
>
> Wayne.B wrote:
>
>> On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed
>> <dedmann DeleteThis @netnitco.net> wrote:
>>
>>>> ==========================================
>>>>
>>>> This is an excellent way to burn out the diodes in your charging
>>>> system if you have any.
>>>>
>>>> Not recommended in my book.
>>>
>>>
>>> not saying you are wrong, but why do you say that?
>>
>>
>> ==============================================
>>
>> If you open up the circuit while it is under load the voltage can (and
>> frequently does) rise to the point where the Peak Inverse Voltage
>> rating of the diodes is exceeded, and the junction permantently fails.
>>
>
I was not doubting his statement. I have never tried it on a boat motor.
I have done it on other charging systems, but cannot argue with
experience.
--
the most committed always win<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Re-charging Battery |
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