Weights and Measures plays a vital role in our everyday lives. Our economy is based on the monetary value placed on goods and services bought, sold and traded daily.
The Ohio Department of Agriculture is the custodian of the Ohio Primary of Weights and Measures, which are traceable to U.S. Standards of the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland.
Local jurisdictions are responsible for testing and inspecting all commercial weighing and measuring devices such as deli scales, gas pumps, upc scanners etc. The state assists in testing and inspecting of vehicle scales, livestock scales, fuel meters (fuel oil, gasoline and LP gas) and packaged consumer goods.
When we check gas pumps, we always take a 5 gallon prover which checks the calibration at each pump. When the prover is full, the inspector will be able to check the reading to see if it is within tolerance. The maximum tolerance is 1 cubic inch per gallon + 1 cubic inch or 6 cubic inches for 5 gallons. (1 gallon is equal to 231 cubic inches)
The purpose of checking scanners is to reduce the problems with scanner errors. We normally randomly select items from a store, chosing items from all departments. We write down the item and the sticker price, then take the items to the check-out and scan each item The stores are required to correct the pricing in their computer so that they scan correctly.
These scales are used to price items by weight. A deli scale is one of the more frequently checked scales of this type. One reason for checking the products in a deli or grocery store is that the tare weight can be added to the product weight which would make the overall price greater. The scales are also checked for accuracy by weighing standard weight blocks.
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