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Lothar-Walther No.4 barrels

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Shamu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: December 01 2019 at 2:51pm
There's an old saying I'll share (& add to) regarding precision measurement:

"Want to confuse a Photographer?
Give him 2 light meters & ask him the "correct" exposure!

Want to confuse a physicist?
Give him 2 thermometers & ask him the "correct" temperature"!

I guess we can add:
Want to confuse an Engineer?
Give him 2 measuring devices & ask for a "correct" dimension!

Calibration is the answer!
I ran a precision measuring instrument (or 3) for years. The trick was in the preparing of the calibration solutions EVERY TIME WITH COMPLETE ACCURACY! The test was for silver & the stuff oxidizes!
Yes, I was "Abbs" for a while.
I could detect (& measure) down to 1:10,000,000 ppm.
the 6 calibration solutions are in the red colored flasks on the right, one is pure de-ionised water for a 0.00PPM reading.
We made them twice daily every day!
If you look at the base of the furnace there are 2 flasks, one red, one white (clear) they're both  deionoised water, but one is a rinse, the other a 100% ultra pure sample. Its that precise.

Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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