>I want to make sure I'm clear on this. Are you saying you have both

>%abv and

>US proof scales? Or are you saying you have only the US proof scale

>that is

>double the %abv scale?

My alcoholmeter has two independent scales, %abv and US proof. A table using

either of these units will work for my application. Since the conversion

between %abv and US proof is so simple I suggest you leave the table(s) in

%abv as it is the international convention for such things. This will

hopefully pervent users from confusing the US proof numbers with British and

other proof units.

>I will certainly recalculate the table to reflect a zero volume

>expansion factor at 60oF.

Sounds fine.

>But I'm wondering, would you agree that the present steps in the

>temperature and >concentration indices are sufficient? Then it's just a

>matter of converting the >column and row headings. (e.g. 0, 1, 2oC...

>becomes 32, 33.8, 35.6oF...; and 0, >1, 2%abv... become 0, 2, 4 US proof

>...) Keep in mind that we'll lose even more >accuracy if I change the

>indices and then linearize the data across the gaps >again. Maybe I could

>change the temperature range to cover 32 to 122oF in steps >of 2oF (i.e, 45

>steps) if that would help.

I typically use celsius for my temperature units thus a table of %abv and

deg. C would be entirely sufficient for me. However it might be useful for

other US people to have a table in deg. F. If you decide to create such a

table I suggest you simply convert the column headings to deg. F since this

would be the easier and more accurate method given that your data was

originally in terms of deg. C.

Thanks again,

Nick

>geoff

>

>Nicholas Hamilton wrote:

>

> > Here is my addition to the list of alcoholometer types. US proof =

>2(%abv).

> >

> > # concentration units temperature units calibration

>temperature

> > - ------------------ ------------------

>-----------------------

> > 1 %abv deg. celsius 20 deg. celsius

> > 2 %abv, US proof deg. fahrenheit 60 deg. fahrenheit

> > 3

> >

> > -----------------------------------------------------------------------

> >

> > Hopefully there are not too many other types in common use. Thanks in

> > advance for the work you have put into this project.

> >

> > Nick

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