BALANCES

BALANCES: measuring instrument used to determine the weight of a substance

Triple Bean Balance         : takes the mass of an object without having to compare it to another

                                                    : preferred for laboratory work when large amounts are to be weighed

             Double Bean Balance       : used when comparing two (2) weights

                            A.      With known weight [set of weights] placed on the right arm of the balance

                            B.      With unknown weight [material to be weighed] place on the left arm

Basic Parts:

·         Weighing pan / Sadle Pan
·         Index Pointer / Needle
·         Riders / Sliding Mass
·         Rider Beams (Two, for double beams; Three, for triple beams)
·         Adjustment Knob (for calibration)

CALIBRATION    : preparation of a usable scale on a measuring instrument

                             : standardization of measuring instruments