Well, that all seems pretty logical...
On Thu, Feb 20, 2020 at 11:10 AM <ch...@wbmfg.com> wrote:
> My first lab standard was 1 one pound bar of a mixture of lead and babbit
> I
> found in our farm shop.
> I cast it and hammered it and shaved it until it weighed the same as a
> pint
> of water.
> I then took it through a metal detector at an airport.
> This was right after DB Cooper and it was the first metal detector at PDX.
> I was certain that it could not detect non ferrous metals. I was right.
> Told the kids at school, the teacher called BS and I bought the bar to
> school. Teacher still called BS.
> But in those days teachers told me things like "when an atomic reactor
> operates, it gives off particles. They collect those particles in a
> container. Atomic bombs are those containers and they break them open
> when
> they want to unleash the bomb". Another gem from the same (science)
> teacher
> "when computers operate they make beeps and boops. Some figured out how
> to
> make those beeps and boops in a controlled fashion and that is what a Moog
> synthesizer is".
>
>
>
> -----Original Message-----
> From: Ken Hohhof
> Sent: Thursday, February 20, 2020 9:40 AM
> To: 'AnimalFarm Microwave Users Group'
> Subject: Re: [AFMUG] Battery heater mat
>
> Heat actually doesn't rise.
>
> Hot air or liquid will rise due to lower density, assuming it is free to
> rise while denser fluids sink. So it might be true in a flooded battery
> but
> not an AGM battery.
>
> Also not true:
>
> A pint's a pound.
> Ground is ground the world around.
> Lightning never strikes the same place twice.
>
> Can't even trust righty tighty lefty loosey, witness twist ties on stuff
> from China and even some Cat5 cable.
>
>
> -----Original Message-----
> From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince
> Sent: Thursday, February 20, 2020 10:09 AM
> To: af@af.afmug.com
> Subject: Re: [AFMUG] Battery heater mat
>
> It probably would depend on the enclosure and/or whether there is
> insulation
> around the rest of the battery. If the battery has an insulation blanket
> around it, the heat from the heat mat should propagate through the entire
> battery. Heat does rise.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 2/20/2020 8:05 AM, Adam Moffett wrote:
> > If you get those heater mats under the battery will you have a
> > temperature gradient where the battery is warmer on the bottom than
> > the top? Will that hurt anything?
> >
> > Suppose the charger has a temperature probe as well. My instinct is
> > to tape it to the same top post as the thermostat probe. I figure the
> > lead post tells me more about the temp inside the battery, and if
> > they're on the same post then the charger and heater are working off
> > the same assumption. Is that reasonable or would you do it differently?
> >
> > I may be at risk of fussing over details that don't matter much, but
> > it's in my nature I guess.
> >
> >
> >
>
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