Author Topic: battery charging  (Read 1319 times)

Mart

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battery charging
« on: November 08, 2006, 10:18:21 AM »
I have just put a battery charging level indicator on my latest SRX. This indicates slight undercharging. I have tried the reg/rec from my old bike and it is still the same. The problem is intermittent ie ten minutes OK ten minutes 11-12 v ten minutes 10-11v then ten minutes under 10v and then back to normal. The time periods are not exactly 10 min each but thereabouts. could this be a demagnetised rotor or am I on the wrong track.

Steve H

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Re: battery charging
« Reply #1 on: November 08, 2006, 12:08:21 PM »
I'd check all the connections for corrosion/fit before delving into other areas

GB500nz

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Re: battery charging
« Reply #2 on: November 09, 2006, 08:58:34 AM »
Doesn't sound at all like demagnetisation. If all the connectors are clean and tight, check the wires inside the alternator. sometimes one breaks due to vibration, or the insulation wears off and it intermittently contacts the case. Easy fix. I clean connectors with CRC Marine 6-66.

guest27

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Re: battery charging
« Reply #3 on: November 09, 2006, 10:53:26 PM »
Why did you fit it - did you think you had a charging problem?

Mantras in process improvement: "Where is your data" "How do you know that your data is correct?" "How do you know your measurement is correct?" "When you have the correct data what will you be able to do different to now" and finally "Why would you want to?"

I managed to develop a charging problem on my old Triton by fitting an ammeter - told me loads of things I did not know.  Mind the problem dissapeared when I took the ammeter off again.

It is always worth calibrating measurement equipment in some manner before use, so you know what is really being said.

Next week sucking eggs.

R

Steve H

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Re: battery charging
« Reply #4 on: November 10, 2006, 07:39:37 AM »
Why did you fit it - did you think you had a charging problem?

Mantras in process improvement: "Where is your data" "How do you know that your data is correct?" "How do you know your measurement is correct?" "When you have the correct data what will you be able to do different to now" and finally "Why would you want to?"

I managed to develop a charging problem on my old Triton by fitting an ammeter - told me loads of things I did not know.  Mind the problem dissapeared when I took the ammeter off again.

It is always worth calibrating measurement equipment in some manner before use, so you know what is really being said.

Next week sucking eggs.

R


Rog, do you remember my question about temperature the gauge on my SRX reading high. The consensus was 'dont worry', so I didnt, and it seized.

guest18

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Re: battery charging
« Reply #5 on: November 10, 2006, 10:07:43 AM »
Rog, do you remember my question about temperature the gauge on my SRX reading high. The consensus was 'dont worry', so I didnt, and it seized.

ooops! :(

Out of interest, did you indentify a cause for the seizure?

guest27

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Re: battery charging
« Reply #6 on: November 11, 2006, 10:00:33 AM »
Ahh seizure - not a good outcome.  I seem to remember - but have not looked back - that there was no certainty about the correct / upper running temperature, and also no certainty that the temp guage was reading correctly.

What I am saying is not ignore it, but why was the meter fitted in the first place, because it was available or because there was a charging issue and the cause was being sought.  In either case it is good to know that your metering is accurate, or there is a correction factor that can be put in. - I have two digital thermometers in the house and they read 1 degree different when stood together, I could always deduct .5 from each, or find out if one is correct (within reason) and then add / deduct from the other.  As it I am not that bothered, I am happy with a general point to when it is close to freezing at night - so I can forget and then look at all the frosted off tender plants in the morning.... :-) 

Though I guess the worst thaat can happen here is that the alternator cooks itself, the reg/rec and the battery - costly but not terminal.

I just remember taking the alternator on and off the Triton too many times, wiring and rewiring the reg and diodes, remounting the diodes here and there.  Buying stealing replacements etc etc before I questioned whether the brand new meter was reading accurately.  It was not and I had spent time effort and money chasing down an electrical fault that did not exist.  We had a similar problem in a factory once where the usless turner (me) could not turn out items to spec.  After much beating up of the turner, checking of his instruments, maint pulling the lathe apart etc, we found out that the inspectors guage had been dropped and was damaged.  But this was the last place looked as it was the 'assured' item...  ooops

Hope cleaning up after the seize was not too costly and all is running well now.

R

squirrelciv

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Re: battery charging
« Reply #7 on: November 13, 2006, 07:38:25 PM »
Rog makes some very sensible points. firstly, where have you fitted your meter? By that I mean, where in the wiring harness have you spliced in? You could be measuring battery output, rather than input. What you describe sounds like a battery at work, drawing down voltage then getting boosted back. Also, what type of meter is it?? For example, a volt meter draws very little current, so can measure 12v in a virtually flat battery, but when a demand is placed on that battery (ie lights go on) nowt will happen.
Best bet would be to try to calibrate it with a standard multimeter placed across the live feed and any earth point with the bike running at 3-4k RPM You should get a reasonably constant 13.something volts
Live long, live well, live happy

Mart

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Re: battery charging
« Reply #8 on: November 14, 2006, 01:45:17 PM »
Many thanks for all your import chaps. All I can say is it worked fine on the old bike. I shall check connection etc and see what happens.