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Rifles, Reloading, Optics, Equipment
Reloading
Balance scale giving incorrect weights
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<blockquote data-quote="misterc01" data-source="post: 2270342" data-attributes="member: 109160"><p>Another oldie but goodie for calibrating or checking calibration on a scale:</p><p></p><p>New quarters from the United States Mint are an option; a brand new U.S. quarter has a mass of 5.670 grams. Other options are brand new U.S. pennies or nickels; a penny has a mass of exactly 2.500 grams, and a nickel has a mass of 5.000 grams.</p><p> </p><p>Place your chosen coin on the scale and read the output. If you placed a penny on the scale, you should read 2.500 grams. If you place a quarter on the scale, the output should read 5.670 grams.</p><p> </p><p>If the scale read 5.671 grams, clearly there is a 0.001 gram difference in the reading and the known mass. Thus, you have also determined that any calibration error will likely be around 10-3 grams, meaning that the scale is fairly accurate for tenths and hundredths.</p><p> </p><p>If the reading for the penny was 2.500, but the reading for the quarter was was 5.700 grams, you can see that the scale only has the resolution to measure a tenth of a gram. This is yet another form of calibration.</p></blockquote><p></p>
[QUOTE="misterc01, post: 2270342, member: 109160"] Another oldie but goodie for calibrating or checking calibration on a scale: New quarters from the United States Mint are an option; a brand new U.S. quarter has a mass of 5.670 grams. Other options are brand new U.S. pennies or nickels; a penny has a mass of exactly 2.500 grams, and a nickel has a mass of 5.000 grams. Place your chosen coin on the scale and read the output. If you placed a penny on the scale, you should read 2.500 grams. If you place a quarter on the scale, the output should read 5.670 grams. If the scale read 5.671 grams, clearly there is a 0.001 gram difference in the reading and the known mass. Thus, you have also determined that any calibration error will likely be around 10-3 grams, meaning that the scale is fairly accurate for tenths and hundredths. If the reading for the penny was 2.500, but the reading for the quarter was was 5.700 grams, you can see that the scale only has the resolution to measure a tenth of a gram. This is yet another form of calibration. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Balance scale giving incorrect weights
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