230V/240V Question
- Thread starter M1AK
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That depends whether you view mathematics as a tool to help our understanding of the real world, or as a branch of theoretical philosophy.
I agree, you don't.
I have to remind you again that it was you who questioned my understanding of the Statistics, which is a mathematical discipline.
Kind Regards, John
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Neither do I. I have equipment here which can accurately measure AC voltage from a few Hz up into the GHz range. What's so difficult about measuring voltage a little way either side of 50Hz?
No, the digital value underneath.
It's higher now.
It's higher now.
That's hardly helpful! If you can't help me to understand what you are trying to say, maybe someone else can? Anyone?
Kind Regards, John
I'm a bit lost. The previous one you posted did have a digital value displayed as "50.000", but you commented about it that it was 'not spot on 50.000" - what did you mean by that?
Kind Regards, John
No, I said it wasn't (spot on) just now.
Just now in the English and correct sense; not the Scottish one.
Quite - and even what you say is only in relation to the practical capabilities of measuring equipment. Conceptually, voltage can be measured regardless of any considerations of frequency, and vices versa.
In any event, for goodness sake, we're only talking about a permitted frequency range of 49.5 - 50.5 Hz. To suggest that one cannot measure voltage 'consistently', and to a high degree of accuracy, across that range of frequencies seems rather extraordinary.
Kind Regards, John
Certainly, taking the legislation in terms of "what it actually says," it appears to be saying just that. If the frequency is precisely 50Hz then the specified voltage limits apply, but if it's 49.999999 or 50.000001Hz the voltage can be almost anything? Obviously that would be nonsense.
Perhaps "declared frequency" in that clause was intended to mean the frequency inclusive of its permissive range from 49.5 to 50.5Hz, so that as long as the frequency is within limits, the voltage limits apply? That would make slightly more sense, but the clause would still seem superfluous, since if the frequency was out of limits the supply would be failing to meet the required specification anyway, whether or not the voltage was out of limits as well.
Quite.
It would - but if that's what they intended, they should have written it!
Indeed - and, in any event, one still would not, strictly speaking, know whether or not it was outside of voltage (as well as frequency) limits, since there would be no voltage limits defined for that situation.
Kind Regards, John
You were talking about the unlikely occurrence of the frequency being spot on 50.
Whilst only to three decimal places, at that time the frequency was 50.000.
However, I pointed out that, as you were saying, it wasn't just now.
'Just now' in England means 'a moment ago'.
In Scotland it means 'at the moment'.
Hmmm - I see! The OED appears to given definitions of both "at this moment" (the "no. 1" definition) and " a little time ago", without any references to Scotland.
Whatever, as I'm sure you understand, my point was that even if the display always read 50.000 (i.e. to 3 dp) that would not mean that the 'true value' (to an unlimited number of dp) was necessarily ever "exactly 50". In fact, theoretically speaking, it 'never' would be!
Kind Regards, John
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