Retail scales are used when selling a weighable product to the customer, as well as when the product is marked and packed. The average maximum weight for these scales is up to 15kg, but scales with a higher maximum weight limit are also available. If a customer is buying something in large quantities, the product is weighed in parts and the results are then summed up. The newer models of retail scales have a double readout value, for example: a scale with max weight of 15kg has a readiut value of 2g up to 6kg and a 5g from 6 to 15kg. A retail scale can also be attached to a printer which can be used for packing as well as printing labels in stores. Usually the lables contain information about the name of the product, its contents, price per kilogram, total weight and sum, production and expiry dates amongst other things. The bar code which can be read by the registers in the store can also begenerated automatically with these scales. The scales have displays on both sides so that the measurements can be easily read by both the salesperson as well as the customer. Depending on the model of the scale, the display is either in a shell or upon a support. The display can be LED or LCD. The LED displays are easier to read indoors. On scales with a built in batteries, the LCD displays are usually used because they use less electric energy. For use indoors, the LCD displays have additional lighting that can turn on or off by itself, depending on if an item is placed upon the scale platform.
Retail scales may posess a memory keyboard (PLU). It can be used to code in the prices that are used most often, and which can be entered by a press of a single key. These scales may also posess a summing fuction. So that the retail scales would be precise, they are required to be leveled with the help of the built in leveling tool. The scale level is adjusted via the supports, which can be adjusted. The scales are considered leveled if the scale stands on all of its supports and if the bubble in the leveling tool is located in the middle.
Since retail scales are used for commercial services, they need to be verfified. When buying a scale, make sure that they can be used in the sphere of the reglamentated meteorology and that they are already verified. Make sure that the scale you are about to buy has been validated as a measurement unit, which is confirmed by the CE marking. By the CE marking, the four digit code(s) and the last two digits indicate when the CE marking has been applied to this scale. Meanwhile the M marking is an additional meterological marking that the scales have received a declaration of conformity. When buying a new scale, the initial verification is valid for two years, after its end the scale needs to be verified once a year, as well as every time when it is repaired and the scale is opened with the removal of the protective stickers. The scales are protected from tampering via a special sticker of a plumb. Without these, the verification is not valid. When using the scales, one must be careful to avoid damaging these stickers or other markings upon the scale. The scales under state meterological control guidlines can be verified by acredited meterologiical laboratories. Information on these labs can be found on the Latvian Natonal Accreditation Bureau homepage (www.latak.lv).