11-30-2009, 11:08 AM | #1 |
Gone Wild
Join Date: Nov 2008
Location: Peachtree City, Georgia
Posts: 1,546
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8v load tester
I am looking to get a battery load tester. I see battery load testers all over that work for 6v/12v batteries like this one (http://www.actron.com/product_detail.php?pid=16161). But am not finding anything for 8v volt batteries. Will these work for 8v? Or can someone point me to one for 8v batts?
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11-30-2009, 11:15 AM | #2 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,356
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Re: 8v load tester
I have not seen them for 8v batteries ......
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11-30-2009, 03:08 PM | #3 |
Gone Wild
Join Date: Sep 2009
Location: Forest City N.C.
Posts: 2,660
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Re: 8v load tester
I have been using the milton 6/12 volt tester for 8 volt batteries and it works the same.
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11-30-2009, 03:46 PM | #4 |
Gone Wild
Join Date: Nov 2008
Location: Peachtree City, Georgia
Posts: 1,546
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Re: 8v load tester
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11-30-2009, 05:09 PM | #5 |
Gone Wild
Join Date: Sep 2009
Location: Forest City N.C.
Posts: 2,660
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Re: 8v load tester
It starts at 0 and goes to sixteen and i just start at 8 volts and when you put the load on it you will see how much it drops.Usually if it goes to 71/2 volts it probably needs a recharge,but if it is less it is probably bad.Hope this helps.
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11-30-2009, 08:29 PM | #6 |
Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
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Re: 8v load tester
I may catch some heat from this one. You know that tester is for a car "CCA" battery right? It may show you a "dead shorted" deep cycle battery, but in my opinion (I know it's only my opinion) you can only really test deep cycle batteries with a hydometer ,volt meter and a "download" machine. A hydrometer will show "specific gravity" readings and may show a bad cell (causing that battery to effect the battery set. A volt meter will show "surface voltage" and can be used to test batteries in a "load" situation (IE: jack up the car, runit and apply the brake to prduce a "load"). Only a download machine will simulate actual "load/run time on the deep cycle set", all DC batteries have "run" ratings. Lets say your batteries are a 6 volt set, lets say there rated at 105 minutes at a 75 amp draw and now the machine stop's when 32 volts are reached on the download and it is only 20 minutes, you have a problem. Instantly turn on the machine and check each battery, you may have one that is stopping extra runnng time. It could be one, it could be 2 or more. Also look at the date code on the leaad terminal. It will tell you the month and year produced. All these tests factor in to battery testing, for running/and warranty.
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12-01-2009, 10:08 AM | #7 |
Gone Wild
Join Date: Sep 2009
Location: Forest City N.C.
Posts: 2,660
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Re: 8v load tester
Well its a starting point as i use a hydrometer to, it still puts a load on a battery. it works fine for me as i was just trying to help out.Everybody has something that works better for them.
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12-01-2009, 06:25 PM | #8 |
Gone Wild
Join Date: Jul 2008
Location: Reddick IL
Posts: 11,217
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Re: 8v load tester
I like to use the load tester to knock the surface charge off and then use the VOM to check charge state. Deep cycle boat bats.
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12-01-2009, 06:37 PM | #9 |
Gone Wild
Join Date: Oct 2009
Posts: 486
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Re: 8v load tester
It is all a matter of Ohm’s Law. You can use a 12 volt load tester on 8 volt battery with no ill effects. It just will not pull as much load as it was designed for, thus not produce as much heat. For example if the load is designed to pull 1000 watts at 12 volts, it will only pull 444 watts at 8 volts. No problem.
Using a 6 volt load tester on an 8 volt battery is asking for trouble, but you may be able to get away with it for a very short time. Example a load designed to pull 1000 watts at 6 volts, will pull 1777 watts at 8 volts. You are asking for a fire. |
12-01-2009, 07:05 PM | #10 |
Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
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Re: 8v load tester
GCF, In no way was I doughting or questioning your methods. I know you are a great help to many. This why I don't post sometimes, I guess go overboard in explaining. Like you, I tried to awnser the members question with what I have done. I hope this thread will help many.
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