Quantcast Scales

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Postal Clerk - Military guide to working in a post office
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Figure 3-11.—Automatic computing scale.
requested by the customer(s).   At larger post offices you will more than likely have a postage meter and a integrated retail terminal (IRT) (chapter 8) to assist you in  conducting  window  business.    All  postal  finance windows should have a calculator.   Learn the proper uses  of  the  equipment  you  have  on  hand,  and  the techniques of operation.  This section will help you in this regard. SCALES One  of  the  most  important  pieces  of  window equipment  is  the  scale.    If  scales  are  not  accurate, postage rates are not accurately computed.  Scales that are used at postal finance windows should be checked for  accuracy  and/or  zero  balanced  each  day  before opening for business.   Scales that cannot be balanced should be removed from service. Automatic Computing Scale As  a  window  clerk,  you  will  most  likely  use  a dial-type automatic computing scale similar to the one in figure 3-11.  A rate chart is attached to the automatic computing scale. This type of scale offers easy-to-read indicators that display the amount of postage to charge, depending on the zone and the weight of the article. This type of scale is normally used to weigh large or heavy articles. If postage rates change, new rate charts will be automatically distributed.  However, if you do not  receive  the  new  chart,  a  new  scale  chart  can  be ordered  by  following  the  procedures  in   USPS Publication 247. Beam Scales The 1-pound beam scale is another type of scale that is frequently used to conduct window business.  A drawing  of  a  1-pound  beam  scale  and  its  parts  are shown in figure 3-12.  This scale is used to weigh large envelopes  and  other  small  articles.    It  has  weight graduations of l/2 ounce up to a maximum capacity of 16 ounces. Unlike the automatic computing scale, you must manually slide the poise up or down the beam until you get a balance for the correct weight.  A larger beam scale with a maximum capacity of 4 pounds is used for weighing large, heavy articles.  Beam scales are  also  available  in  a  100-pound  capacity.    Some MPOs have the 100-pound beam scale instead of the 70-pound  automatic  computing  scale.    (See  figure 3-13.) Balancing the Beam Scales The accuracy of beam-type scales may be checked by setting the movable weight at zero.  If the scale is in balance, the indicator will come to rest exactly even with the line on the right of the scale.  If the indicator comes  to  rest  below  the  line,  the  scale  is  weighing light;  that  is,  the  scale  would  indicate  that  a  letter weighing 1 ounce weighs less than 1 ounce.   On the other hand, if the indicator comes to rest above the line, the scale is weighing heavy and would show letters weighing exactly 1 ounce to be more than 1 ounce. It is easy to adjust the scale by means of the screw at the end of the weight indicator.   To balance, turn screw  on  the  frame  of  the  scale.     Using  a  small screwdriver, you can adjust the screw until the scale is brought into balance. When the scale is weighing light (indicator  below  line),  turn  the  screw  to  the  right (clockwise).     When  the  scale  is  weighing  heavy (indicator above line), turn the screw to the left.   A slight turn of the screw will usually balance the scale. You should experiment until it is exactly in balance. Electronic Computing Scale As the automatic computing scales and 100-pound beam  scales  used  by  MPOs  become  irreparable  and replacement is necessary, the MPOs will be issued the new  electronic  computing  scale.     The  electronic computing scale has the following features: Standard  RS-232  interface  with  a  selectable output for communications with a computer. Adjustable response time. Optional push buttons. Optional remote displays. Single board electronics for ease of servicing. Single button selection of two weighing units. When calibration becomes necessary, the scale can be calibrated using the existing keypad or through the RS-232 interface. CALCULATORS One of the most useful and versatile machines in a post office is the calculator.  The calculator is capable of adding, subtracting, multiplying, and dividing, and Navy post offices should use calculators that have the ability to print a tape.  Its use is a must in performing many of the calculations done in the post office, such 3-18

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