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| You want a digital scale for What?? |
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| HighVoltage:
One thing that usually is overlooked when using a precision scale is air weight displacement by the part that is being measured. |
| jfiresto:
From Robert W. Shaw (1980) Balance Corrections for Buoyancy, Journal of the Air Pollution Control Association, 30:8, 908-909, DOI: 10.1080/00022470.1980.10465130: --- Quote ---In conclusion, conditions may occur when buoyancy corrections to weight changes become significant. An object with a specific gravity of 1 or 2 and a volume of several cubic centimeters may appear to change its weight by amounts on the order of 0.2 mg merely because of changes in the weather and consequent changes in air density. Anyone involved in high accuracy weight determinations should calculate the appropriate buoyancy corrections and keep track of local air density during gravimetric determinations. --- End quote --- |
| David Hess:
--- Quote from: HighVoltage on August 16, 2020, 01:47:04 pm ---One thing that usually is overlooked when using a precision scale is air weight displacement by the part that is being measured. --- End quote --- "Ha, look! After pressing down on the scale, it did not return to zero!" "That is the weight of your fingerprint." |
| bson:
I have several gram scales and use them for all kinds of things... Most recently I was curious exactly how much 2 g of salt (NaCl) is. |
| coppercone2:
--- Quote from: bson on August 17, 2020, 03:20:40 am ---I have several gram scales and use them for all kinds of things... Most recently I was curious exactly how much 2 g of salt (NaCl) is. --- End quote --- you know, if you have health problems, its a good way to measure how much salt you are adding to your food in a restaurant. Or sugar, for diabetics. There is too many options, sea salt, granuated sugar, powdered sugar, crystal sugar (brown), syrup packets, honey packets, kosher salt (served in a bowl often), different grinds of salt. You can't measure it with a spoon to medical requirements. I.e. salad bar food prep (temporarily out of style due to disease). Nothing there should be seasoned, theoretically you can get a vegetable salad, add only oil, then salt it to the correct amount for taste and diet. Some doctors argue you should meter the amount of salt you eat very well, even if you have no medical problems. So many people have high blood pressure. |
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