Figure 3-13.100-pound beam scale

as completing a mail dispatch manifest or preparing money order reports. This will be discussed later in this training manual. The most common type of calculator found in military post offices is the electronic solid-state machine (see figure 3-14). The same general principles apply for all operating calculators; however, keyboard arrangements vary slightly depending on the manufacturer and model. You will have to learn the details of your machine from an experienced operator or by studying the manufacturer’s instruction booklet. All calculators are precision instruments and must be protected from bumps and jars that will upset the delicate balance of their mechanism. As with other office machines, dust and dirt are big enemies. Keep your calculator clean and covered when not in use. If the machine is not operating properly, immediately 3-20 PLATFORM POISE BEAM OUNCE GRADUATION OVER-UNDER INDICATOR BALANCING SCREW OVER-UNDER MARK WEIGHT OF ARTICLE PCf0312 0 1 2 3 4 5 6 10 11 12 14 ¹⁵1 LB 1/2 OZ 13 Figure 3-12.—Beam scale. PCf0313 Figure 3-13.—100-pound beam scale. PCf0314 Figure 3-14. Example of an electronic calculator used at most MPOs.