Series
50 Proving Rings
The Series 50 Proving Rings are
designed for specific applications requiring high capacities with low
profiles. They are particularly
well suited for the calibration of concrete testing machines and other types
of testing machines with limited daylight openings.
Other Morehouse Proving Rings are designed to give the greatest
possible deflection under load to achieve maximum accuracy.
The design criteria, however, requires large outside proving ring
diameters. In high capacity
proving rings, the size is prohibited in many applications.
The series 50 proving rings are produced only in higher capacities
where size is critical. Because
of their low profile, they are also lighter in weight than comparable
capacities in larger diameter rings resulting in easier handling.
While the amount of deflection under load is reduced in the Series 50
proving rings, it is still sufficient to provide low uncertainties with good
readability. An adjustable
vernier index supplied with the proving ring may be set at zero at no-load
condition to further simplify readings during calibrations.
Series 50 proving rings fall well within the specifications outlined in
ASTM E74 for standards used in class A loading ranges.