I realized that with everyone posting weights of components that our scales are not calibrated. In other words, if I weigh my stem on my scale I might come up with 180 grams. If I weight the same part on another scale it might come back 160 grams. Nothing wrong with either scale but we cannot compare component weights this way because mines will always report parts as weighing more than on the second scale. This may be relevant to me on my own bike but on the Internet, where we can compare components bought by different people around the world, it does make a difference. The problem is that we need to find something that people can compare weights to. In the USA we can weigh ten quarters or average the weight of ten cans or Coca-cola or something. What do you folks think?
Calibrating scales, anyone?
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As long as people are using decent scales (I work in retail, so I use the scales are work which I know are accurate) it shouldn't be a problem. An easy way to check if you scale is reading correctly would be to zero it with a precise measuring device for water (EG a cup measure) then weigh it full of water. A cup (250ml) of pure water weighs exactly 250 grams.
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When you buy banana's at the supermarket (who doesn't?), put them on your own scale at home and compare.
Some products "Everyone" uses are so consistently made, you can calibrate scales with them. Like the 195g 9spd DA rear derailer. Or 223g 12-27 9spd Ultegra cassette, that sort of thing.
Some products "Everyone" uses are so consistently made, you can calibrate scales with them. Like the 195g 9spd DA rear derailer. Or 223g 12-27 9spd Ultegra cassette, that sort of thing.
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I'm with most of the people on this board - as ong as you have a modern digital scale then it should not be out by too much. If you're measuring to sub gram level then calibration would be more of an issue.
I'm more concerned with the sometimes suspicious weights given fin parts lists for individual bikes on the various light bikes websites. This seems to be done IMHO just to cheat down the weight of the bike.
I'm more concerned with the sometimes suspicious weights given fin parts lists for individual bikes on the various light bikes websites. This seems to be done IMHO just to cheat down the weight of the bike.
Cheap scales can't be calibrated! If yours can, it will say so in the manual along how to do it...
I'm lucky; I have access to scales at work precise up to 0.0001g if I want!
But then again, 1 gram precision is more than enough to get a good measure of your bikes weight!
Luego!
I'm lucky; I have access to scales at work precise up to 0.0001g if I want!
But then again, 1 gram precision is more than enough to get a good measure of your bikes weight!Luego!
How dare you call us "strange"
After all, we've invaded many a nation for lesser slights.
Now, getting away from potential military interventions, I do see in looking around that not only Americans are "strange"
Cups.....cups......and more cups
1 US cup = 237 ml (milliliters),
1 UK cup = 284 ml,
1 Aus. cup = 250 ml
If this is going to be a international forum, then perhaps we should NOT be using cups of water as a measurement.
Granted you said, 250ml but all we read is "cup"..........Heck, in America we don't even know what a ml is.....
Some kind of strange measurement like.......meters, km, and the like...used by unusual backward peoples back in the old homelands of our ancient ancestors. Kind of like woolly mammonths and dinosaurs.
I don't know where you live, but you are skating on thin ice when you call Americans "strange".Some Guy said:
After all, we've invaded many a nation for lesser slights.
Now, getting away from potential military interventions, I do see in looking around that not only Americans are "strange"
Cups.....cups......and more cups
1 US cup = 237 ml (milliliters),
1 UK cup = 284 ml,
1 Aus. cup = 250 ml
If this is going to be a international forum, then perhaps we should NOT be using cups of water as a measurement.
Granted you said, 250ml but all we read is "cup"..........Heck, in America we don't even know what a ml is.....
Some kind of strange measurement like.......meters, km, and the like...used by unusual backward peoples back in the old homelands of our ancient ancestors. Kind of like woolly mammonths and dinosaurs.
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Sorry, the metric standards are part of the Systeme International d'Unites, and the Americans are the only ones not adhering to the system.Chester said:
Just as I thought, a French conspiracy
"Systeme International d'Unites"........ I thought so, its those darn Frenchies trying to ruin the world by doing everything they can to stall the American march towards progress and perfection. Well, they'd better watch out or we'll take a "pound" of flesh out of their backsides.Illimidwyn said:
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Hey Hey Hey! I'll let you know my car gets 31 Rods per the Hogshead and that's the way I like it!Illimidwyn said:
Thanks for that. My 12-27 9-speed Ultegra cassette weighs 228g. There's a 5 gram difference. Is that five grams from production tolerances or due to scale error?Cloxxki said:
We have calibration weights at work (with a big note next to them stating that you cannot touch them with your bare hands!!!) that I can probably use to see how close my scale is. At least I can get an idea how far off it is so I can have a correction factor to ensure that the weights I post and record are closer to what they should be.
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Really?Chester said:
Seems pretty stange to me
.As long as you know the volume of your cup in ml, there is nothing wrong with it.
FYI, it's the imperial system which is outdated and backward. Are you awear that most of the measurements currently used in the US date back to the middle ages? Have a read of http://www.unc.edu/~rowlett/units/usmetric.html
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So you are going to calibrate a scale to a gram accuracy by using a cup with hash marks on the side?? Do you have a lab quality beaker to use? How do you account for the unknown weight of the container if you can't trust the accuracy of your scale?
You are being tricked by those pro French, anti-English types
A quote from that link tells it all.....
"The metric system originated in France in the 1790's"
Exactly.......them Frenchies trying to foist their system upon the world.
Well we're onto their tricks. They may have the Tour d'France" but how often do they win the race?
Instead they attempt to slander Lance and indoctrinate the world with metric standards.
The tide is turning and from what I hear, the UCI weight limit is gonna be changed from
6.8 kilos to 15.0 pounds so we don't have to deal with all those decimal points.
Oh come now, you don't really fall for that revisionist portrayal of history do you?Some Guy said:
A quote from that link tells it all.....
"The metric system originated in France in the 1790's"
Exactly.......them Frenchies trying to foist their system upon the world.
Well we're onto their tricks. They may have the Tour d'France" but how often do they win the race?
Instead they attempt to slander Lance and indoctrinate the world with metric standards.
The tide is turning and from what I hear, the UCI weight limit is gonna be changed from
6.8 kilos to 15.0 pounds so we don't have to deal with all those decimal points.
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how to calibrate the watch scale
Hello friends
If you are using a watch scale that can be calibrated according to the steps I have outlined in this article "Calibration of spring watches".
Hope after reading this article can help you calibrate your watch scale.
Hello friends
If you are using a watch scale that can be calibrated according to the steps I have outlined in this article "Calibration of spring watches".
Hope after reading this article can help you calibrate your watch scale.
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