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