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The Big and Dandy Scale Thread (First wave - archived 10-31-07)

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*sigh* I'm returning it. It doesn't even register the 5g or 10g weights included :(
 
There is no way the first scale is reliably +/-1mg. No way, no how. It is a pretty easy scale to work with though, but expect 2-3mg deviance. This model seems to be exactly the same as the American Weigh equivalent.

No clue about the other.

Peace.
 
I'm kinda iffy on a site that uses "ya" rather than "you". Just me though.
 
I bought a Jennings JS-VG, works fine. Max 20 g, min 2 mg.

I would suggest looking for the most recent models.

I think GemPro has some better scales that measure down to 1mg, but I think these cost more than $ 100.00. My Jennings cost me just a few bucks more than $ 100.00, after taxes and shipping.

I suggest also using Google or other search engine and looking at several models before buying.
 
Beezaa you're not going to be able to find a scale that's decent enough to measure RCs for less than a 100 dollars that isn't a piece of shit, I'm afraid.
 
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I have a digi weigh. I like it, although I do believe it has a deviance of a couple mg.

I got it at a kiosk in the mall and the guy was like, Im just asking but what do you need such an accurate scale for.
I said Im a chemistry major and I need it for lab.
He said tell Santa Fe that I have alot of these in stock, and to send the other students here.

Yah sure...
 
I own the Jennings Precision 10 that you are considering. It definately isnt accurate to .001. I usually weigh in capsules and even then I have to weigh many times over and average it out.
 
I think sources related to harm reduction devices are allowed
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Correct. Thread merged.

I personally would be very careful about buying a cheap sub $100 dollar scale for research chems. An error of just a few milligrams can make a huge difference with some chems.
 
I think mine does weight down to 2 mg as claimed. I suggest also buying calibration weights and checking it carefully. I still have to do this, BTW.

Best I have done so far was to do a fast check with Al foil pieces, cut to different sizes. For instance, cut a a rectangular piece of foil, trim it till you got 10 mg or so. Cut it in five equal pieces, see if it weights 2 mg correctly, etc. Mine passsed this test.

I have seen some comments that the older models of the refered brand are less accurate, though. Reason why I have suggested to look for more recent models.

I would not recomend it for DOI or similar though.
 
I have the opportunity to get a balance scale for free through my friends mom, I havn't seen it yet but I know it's a balance, weighed against set weights. It's probably very old, but should have been decent quality for 30 years ago as it was from the chemistry department of a large university. I was told that it could measure in mg's, is this possible for a piece of equipment like this to do accurately? I'm sure it'd be fine for weighing larger quantities in g's and such, but I'm wondering how accurate it woudl be for mg's and such. Anyone have any sort of idea what I'd be looking at?
 
JuicyJay said:
*sigh* I'm returning it. It doesn't even register the 5g or 10g weights included :(
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Update on my scale. I got it a while ago, and it works perfectly. I weigh multiple times on this scale and weigh on my .01g scale. They match up above 20mg. I like this new scale, but do not like the weighing tray, it's too small. I will put on a card and tare or sometimes not. Put on the item and then weigh that way. Seems very accurate :D Makes me happy.
 
Xorkoth said:
I've got the JPrecision, and I agree with your assessment. It seems to fluctuate between values, and if you sit there watching it it seems to slowly crawl upwards until eventually it's reading 10-20mg above what it initially read. Weighing several times is definitely a necessity, as is liquid measurement when using highly potent compounds such as the DOXs.
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This seems to be a quirk with most low-end milligram scales, not just the jprecision (and american weigh which are identical). Whats happening, I can say with certain surety, is that you are not letting the scale recalibrate itself long enough between weighing.

The number registering will creep upwards slowly if you lift up and set down with too short a calibration 'rest' period in between weighing the same thing over and over.

Does this conform to your experience?
 
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