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Re: HP 54542A

 

I am old school, I categorize folks into two groups: Those who
speak and write in English, and those who don't. I pay attention
to the one group, and the other, not so much.

If my capitalization affects clarity, then by all means pick away,
in this case, it didn't... not at all. You knew instantly what I
meant, and yet chose to... What did you choose to do?

As for why I chose, and I did choose carefully, to say AH as an
indication of energy, rather than just as charge, it was because
of guys who act like you did.

Either way I was going to take a hit. I preferred to be precise.

3V2.5AH is an indication of the energy stored in the cell... Maybe
even exactly the energy stored in the cell when it was new, and the
phases of the moon were aligned just right, and the current you
draw isn't too much, or too little...

3V2.5A doesn't really mean much, as the OP stated.

-Chuck Harris


Carsten Bormann wrote:

On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:

Carsten,

How is the amp hours of a cell not an indication of the energy
stored in the cell?

The cell was already identified as being 3V, as was quoted in my
reply.

I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)

The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal wealth¡±, sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?

Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list. This one message just happened to be the straw that broke the camel¡¯s back. Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to. And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles.

(This is getting a bit off-topic from HP 54542A scopes. Which say 2 GSa/s on the bezel¡­)

Gr¨¹?e, Carsten
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