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MultiMeter Question

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• I recently Had 4 PathFinder solar yard lights Fail due to Battery exhaustion. I took the solar cells out of them and made a small solar panel. 4 of them
Message 1 of 3 , Mar 3, 2002
I recently Had 4 PathFinder solar yard lights Fail due to Battery
exhaustion.
I took the solar cells out of them and made a small solar panel.
4 of them connected in series puts out 17.5 volts DC.

Here is the question:
When I put the meter on the 500 DCmA setting
the 50 scale reads 23.
How do I calculate the milliamps?
Do I multiply 23x50=1150ma (1.150Amps)
or do something else?
Thanx
DougBays@...
********************
• If you want to know the current capacity, you need to test the cells with a load such as a variable resister. If you hook your ammeter up directly to the cells
Message 2 of 3 , Mar 3, 2002
If you want to know the current capacity, you need to test the cells with a
load such as a variable resister. If you hook your ammeter up directly to the
cells you are going to break something.

--- doug_bays <DougBays@...> wrote:
> I recently Had 4 PathFinder solar yard lights Fail due to Battery
> exhaustion.
> I took the solar cells out of them and made a small solar panel.
> 4 of them connected in series puts out 17.5 volts DC.
>
> Here is the question:
> When I put the meter on the 500 DCmA setting
> the 50 scale reads 23.
> How do I calculate the milliamps?
> Do I multiply 23x50=1150ma (1.150Amps)
> or do something else?
> Thanx
> DougBays@...
> ********************
>
>

=====
-Martin Klingensmith
http://archive.nnytech.net/
http://devzero.ath.cx/
http://www.nnytech.net/

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• Shorting out a _small_ solar panel to determine the short circuit current should not harm anything. A reading of 23 on the 500 mA scale is 23mA assuming
Message 3 of 3 , Mar 3, 2002
Shorting out a _small_ solar panel to determine the short circuit
current should not harm anything. A reading of "23" on the 500 mA
scale is 23mA assuming that you have a digital multimeter. A 500mA
scale is a little odd for a digital multimeter though.

23mA is about the right output for the application you have described.

o What is the area and open circuit voltage output of a single panel?

--- In Electronics_101@y..., Martin Klingensmith <raidfibre@y...>
wrote:
> If you want to know the current capacity, you need to test the
cells with a
> load such as a variable resister. If you hook your ammeter up
directly to the
> cells you are going to break something.
>
> --- doug_bays <DougBays@h...> wrote:
> > I recently Had 4 PathFinder solar yard lights Fail due to Battery
> > exhaustion.
> > I took the solar cells out of them and made a small solar panel.
> > 4 of them connected in series puts out 17.5 volts DC.
> >
> > Here is the question:
> > When I put the meter on the 500 DCmA setting
> > the 50 scale reads 23.
> > How do I calculate the milliamps?
> > Do I multiply 23x50=1150ma (1.150Amps)
> > or do something else?
> > Thanx
> > DougBays@h...
> > ********************
> >
> >
>
>
> =====
> -Martin Klingensmith
> http://archive.nnytech.net/
> http://devzero.ath.cx/
> http://www.nnytech.net/
>
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Sports - sign up for Fantasy Baseball
> http://sports.yahoo.com
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