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Mettler h-10 analytical balance single pan works
METTLER H-10 Analytical Balance Single Pan WORKS
METTLER ANALYTICAL BALANCE, SINGLE PAN, SUBSTITUTION BALANCE 160.0G MAX
MODEL H-10 SER NO 445842 METTLER INSTRUMENT CORP 110V 60CPS 15W
Use/History: The single-pan, substitution balance is much faster and more convenient then the traditional two-pan, equal-arm balance. It thus rapidly replaced the older type after its commercial introduction by Erhard Mettler in 1946.2 In this type of balance the pan and weights are counterbalanced by a single fixed weight on the long end of the beam. Weighing is accomplished by removing the built-in weights to compensate (within 1 g) for objects placed on the pan. The final 1 g is read off to 0.1 mg from an illuminated/projected optical scale attached to the long end of the beam and adjusted with a counter. Because the total mass on the balance remains essentially constant in all weighings, weighing precision also remains constant over the range of the instrument. This is in contrast to the double-pan balance, where precision decreases with load. The Mettler H10 balances include a taring system, allowing the balance to be zeroed with a weighing container in place, and a filling guide (100 mg range) showing approximate weight while adding material.
