On Feb 1, 8:11*am, jim wrote:
On Feb 1, 12:40 pm, jim wrote:

On Feb 1, 9:05 am, "frederick ploegman" wrote:

"jim" wrote in message

....

On Jan 31, 11:18 pm, "frederick ploegman"
wrote:
"jim" wrote in message

...

On Jan 31, 5:54 pm, pp wrote:

Unless you are in the UK where triple scale hydrometers made after
1983 seem to feature a different version of PA to anyone elses heh
heh...

I think the only change was to the temp standard used for calibration.
I still have the older ones that used 60f as the standard. *I think
most of the newer ones use 68f as the standard. *The standard used
should be printed on the each hydrometer. *Temp compensate and
you should end up with the same numbers.

That is a sensible deduction. However, the hydrometer one I inherited
from my father - which matched the scale commonly used in the US - was
calibrated to the same temperature as my current triple scale which
doesn't match any PA system anyone else seems to use

I am sure you are right in general though Frederick!

Jim

Hmmmm...The ones I have also state that they are specifically
designed for use in beer and winemaking. *Yours *??

Yes they say "wine or beer" at the top of the hydrometer. *Both were
made by Peter Stevenson Ltd (made in Scotland). *Sadly I have broken
the one which used the same PA scale as the American system (and which
was made I think actually in 1976) *The current model was copyrighted
in 1983 and is the same one I can still buy from my winemaking shop.
They were both made for beer and winemaking. *Curious isn't it. *I
once tested the PA scale of the two side by side and in some areas it
was wildly different. *I think the differences are recorded somewhere
on the group though I can't find them at the moment.

Jim

Sorry for the poor composition but here are the markings at the high
end of my hydrometer:http://i94.photobucket.com/albums/l9...r/montaged.jpg

They don't tally at all with any of the 5 PA sclaes on the chart from
brsquared.org

That's why I think it's weird...

Jim

Well, I decided to buy a refracometer and learn to use both. I
figure it can only help.
Thanks for all your help.