Mg scale a bit off?

I just got my mg scale (this one: 0.001g 20g Digital Milligram Gram balance weight Scale (160382523842)

When i try and calibrate it, its like 16 mg off. This is kinda bad for what im using it for because i need it to be exact. Any ideas why this is happening? or did i just get a dud :\

Take that shit back or ask conpany what's up? Are there calibration instructions or anything

Yeah and im followin them right, but it starts at 10.000 when i put the weight on then it drops from there. Is the weight a little light maybe?

hey BBN i got the same one and it acts weird to ill do the calibration on it and then when i weigh the weight it doesnt weigh 10 it weighs 9.999 and then keeps dropping to like 9.998, 9.997, etc.

Its broken, swap it out.

Does your still have the little plastic case on it? or am i supposed to take that off? I dont really want to wait the 2 weeks to get another one because my spring break starts tomorrow... This sucks. My 2c-i got here today too :[

Maybe the batteries im usin are low? UGH!

WHat i would do is calibrate it with the lid on, on the floor or somewhere that doen't vibrate, let it stand till its done, then weigh the weight with the lid closed, and note the weight after about 5 minutes, by which time it should have settled. Then add whatever I was weighing to the plate without removing the weight, and do the math. You can google some coin weights on google and see how it works out in a test.

Ok thanks man. Im just havin a really hard time findin a flat surface to weigh on. That could be the problem...

Also when i put my head like really close to it and listen i can hear that really high pitch noise, iv heard it called the mosquito noise before. You know what im talkin about?

I can't hear it on mine, but my pc speakers pick it up if i bring it close...

I think i got a defected one. Just gonna wait out the next week then tell em to send me a new one.

That's the exact same one I got ANC! Works like a charm

Guess i did get a dud then.

Always weigh on a flat surface... otherwise, the weight will keep on jumping to different weights!

That scale is pretty decent... haven't had any troubles with mine. Although, I've read some people's reviews on it and complain about the battereis draining while the device was off. Not sure of that problem as mine has worked with no outstanding complaints!

I got two units, one for me and one for a friend, both still running on original battery after more than a year of near daily use.

Had mine for nearly 3 months... and batteries are still running strong!

K cool. Well i weighed it on what i thought would be a more flat surface and it said 10.002 so i think it is the uneven surface

I have the same exact one from ebay, and ive had it for a while and it works good for weighing JWH-018 and its been running on the same batteries. But i hear the same high pitched noise haha, ANYWAY just use the white manual they gave you to put it under one of the corners of the scale and it should be flat, because mines not flat and it wasnt the table.

Ok cool cuz mine is wobbly too