The Plummet Balance consists of a vertical rod mounted on a heavy base with levelling screws. A light weight pointer with pointed steel pivots, turning in jeweled bearings moves over a scale graduated in percentage units 0-100 in 2% divisions. The pointer is provided with a hook for hanging plummet. The balance moves up and down over the vertical rod with the help of rack and pinion arrangement. A chart showing the relationship between K and Temp. of suspension of soils of varying specific gravity from 2.4 to 2.8 to help solve Stoke’s equation is provided. Supplied complete with one perspex Plummet, one measuring jar, one rider weight for zero adjustment and one rider weight for adjusting the pointer to 100%.
Ref. Standard IS:2720 (Part4)