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CAT NO: DIDACTICNLE-Export-015010
Plummet Balance.
Conventionally particle size distribution analysis
is carried out using pipette and hydrometer methods.
Whereas in
hydrometer method it is possible to determine particle sizes in the
range 75microns, the method involves computation and it is time
consuming. The pipette method can be used for determining only the
percentage of specific sizes less than 0.02, 0.006 and 0.002mm as a
percentage of total soil sample. The plummet balance method to determine
sub sieve particle size for the entire range is very rapid and only
manipulation of height of the balance, so that plummet sinks to the
right depth is required. The percentage of soil in suspension is
directly indicated by a pointer over a graduated scale. A vertical rod
is mounted on a sturdy base having leveling screws. A pointer with steel
pivots turns is jewel bearing an moves over a graduated scale. Scale
graduations are market 0-100% x 2% To the other end of the pointer a
plummet is hanged. Rack and pinion arrangement is provided on the
vertical rod for adjusting the height. Supplied with a chart showing
relationship between “K” and temperature of suspension of soils of
varying specific gravity from 2.4 to 2.8 to help in solving stroke's
equation. Supplied complete with one Perspex plummet one measuring jar
and one rider weight for zero adjustment and rider weight for adjusting
the pointer to 100%.
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