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To: null and void

Being from a metrology background, I can understand the importance of this problem.

A few years back, the NIST (formerly the NBS) was working on an electrical representation for mass / force using a huge magnetic coil type device. I guess they still have not perfected this standard.

It basically would be a device that would exert a certain amount of force when a known current was passed through the coil...........


3 posted on 01/09/2013 7:35:45 AM PST by Red Badger (Lincoln freed the slaves. Obama just got them ALL back......................)
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To: Red Badger

The high point of my career was making a silicon IR photodiode that forced the NBS to recalibrate its standards.

It was either that or admit my sensor had better than 100% quantum efficiency...


5 posted on 01/09/2013 8:06:10 AM PST by null and void (Someday your prints will come...)
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To: Red Badger

There was an article last year on the NIST effort with magnetic coils, and a competing team from Germany trying to come up with a new standard:

http://www.wired.com/magazine/2011/09/ff_kilogram/all/


10 posted on 01/09/2013 9:01:28 AM PST by Strategerist
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To: Red Badger

Wouldn’t the force change it the coil gathers contaminaton?


13 posted on 01/09/2013 11:04:59 PM PST by Getready (Wisdom is more valuable than gold and diamonds, and harder to find.)
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