locations are sometimes used. The process by which an unknown weight (mass) is compared with a calibrated weight (mass) is
called weighing.
b. Simple comparisons. The simple method of comparing two weights is to let them hang from opposite ends of a lever which
is supported and pivoted at its center. Exact measurements require that you know the ratio of the beam (lever) arms; that you
suspend the weights from equal, corresponding points from each of the ends of the beam; and that the friction at the pivot point
be reduced to its lowest value.
3. Single Pan Balance (Figure 1)
a. Typical Analytical (Micro) Balance. The construction and operation principles for the typical analytical balance are so
interdependent that it is difficult to teach one without teaching the other. However, in this section, we identify some of the
major components of a typical analytical balance before we teach the basic operating principles for the balance.
b. Balance Control Functions. (Item numbers refer to fig. 2)
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