Timeline for Hardware required for measuring small weight changes?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 21, 2011 at 20:35 | vote | accept | Andrew | ||
| Aug 16, 2011 at 13:15 | comment | added | Russell McMahon♦ | @Fake Name - coin masses are highly standardised in integer gram amounts in many countries. I have a reasonably extensive international loose change collection gathered in recent years during travelling. I spend a happy hour or few a while ago weighing various samples of all the coins I had. While hardly an eclectic collection the trend was very very very clear. I don't see the need to point to tables for roubles, pesos, drachma, shekels, ... . Weigh a few of your target coins or ask your bank and you'll rapidly find out. Weight based coin counters are very widely used by banks world wide. | |
| Aug 16, 2011 at 12:23 | comment | added | Connor Wolf | I understand the logic behind using coins as test-masses. However, I was trying to point out that their use is high localized. The coins in every country are different, and you can't just discuss using them without some sort of reference to where the coins you are using are from, and (ideally), somewhere that people can look up what the weights of their local coinage is. | |
| Aug 16, 2011 at 10:53 | comment | added | Russell McMahon♦ | Using coins or other items as test masses relies on their mean mass being close to a consistent constant value when a large quantity are weighed. NZ 1 cents = 1 gram, 2 cents = 2gram. I do not know how accurately or tightly they cluster around these values but for practical purposes they are effectively perfect using up to several hundred coins and scales with 1 gram resolution. | |
| Aug 16, 2011 at 10:50 | comment | added | Russell McMahon♦ | @Fake Name - In NZ (New Zealand) we had 1 2 5 10 20 50 cent coins. The 1 2 5 have now been removed from circulation. I reatined a quantity for use as test weights. In many but not all countries the mass of coins is arranged so each is an integral number of grams. This allows them to be easily counted by weighing a quantity using suitably accurate scales and dividing by a coin's mass. Obviously this works for non integer gram masses if coin weights are consistent but makes use of a calculator necessary. In country of choice substitute low value integer gram mass coins of choice. | |
| Aug 16, 2011 at 9:51 | comment | added | Connor Wolf | What, exactly, is a "Two Cent" coin? I don't think I have ever seen one. | |
| Aug 16, 2011 at 5:01 | history | answered | Russell McMahon♦ | CC BY-SA 3.0 |