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200g scale calibration weight - anything an aussie might have around the house?

S

Stato

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Joined
Jun 26, 2011
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As title says, I'm wanting to calibrate a pocket scale, of course I could go and purchase a calibration weight (and will, at a later date) however I'm wondering if I can calibrate it now with what might be lying around the house.Now considering the searching I've done seems to suggest most people use currency as it has a known weight, it seems though that australian coins are pretty all over the place, 15.55g for a 50c piece.... lucky americans have an exact 5g nickel.

I need an exact 200g and wondered if there was anything other aussie bl'ers know to have this weight that one might have lying around or can get at the shops?

I never actually had a scale, but It's always nice to know exact amounts especially for harm reduction, the scale that I have is supposedly 0.01g graduation.
 
Mr Blonde said:
200mL de-mineralized/de-ionized water?
Click to expand...
Right, whilst that would weigh 200g it would then have to be within a container putting it out probably a few grams.

I know an iphone 4 weight is 137g so they say on wikipedia, and mine comes up 140g on this scale, hence me wanting to calibrate the thing because I'm not so sure it is 100%. (That said, Its probably likely that different revisions and regional models may have a slight difference like that)

That said, it is a cheap chinese scale, an accuracy of +-10 or 20mg would be acceptable as I'm not using it for dosing RC's or anything that will kill me, it's more to check that the weight of whatever it may be is as said.... and to gauge consumption.
 
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^ Freeze it?

I don't know, I really think you should buy the calibration weight. Or try and use differing coins and have it be slightly out. :\
 
Can't think of anything off the top of my head.

How accurate does it need to be? Not sure if anything around the house will be accurate down to the mg or less level :\.

Doesn't water without impurities weigh 1kg per litre? I was thinking you could use 200ml but I suppose you need something to put it in also.
 
Christ! said:
Can't think of anything off the top of my head.

How accurate does it need to be? Not sure if anything around the house will be accurate down to the mg or less level :\.

Doesn't water without impurities weigh 1kg per litre? I was thinking you could use 200ml but I suppose you need something to put it in also.
Click to expand...

Only worried about +-20mg accuracy, I wouldn't expect any better on a cheap scale.
 
lol Mr Blonde beat me...I opened this to reply, went away and did something then came back, didn't realize he had already said it.

Freezing it is such a good answer to the problem of the water having no container :D

You could probably do a combination of coins...but I'm not sure how much coins vary in weight. Just go for the official calibration weights.
 
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Yeah, smart people here, thanks guys. I may even have demineralized water around the house too, If i put it in a plastic party cup and freeze it you can cut the cup off it later and it should be pretty good :)
 
I might not even calibrate it.... wikipedia shows a 1 dollar coin having a weight of 9.00grams, my scale is showing between 8.97 and 9.00grams on a 1 dollar coin, which is actually funnily enough a 1984 minted 1 dollar coin... so it's as old and circulated as one would think as they introduced $1 coins in 1984.

Thanks again
 
if ur using a 200g x .01g scale, putting a 200gram weight on it isnt going to tell you much... most of the people I know use a 5cent piece.
 
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