gemini scale all over the numbers

[[Jo...]]

Hi

I started wighning my diazepam 10 mg one day a hole pill weights 184 the second day 174 i recalibrate the scale every time i use i put it on solid floor and close the lid can anybody with experience with this scale can help me figure out what is wrong

Thanks

[[Bi...]]

Hi

I started wighning my diazepam 10 mg one day a hole pill weights 184 the second day 174 i recalibrate the scale every time i use i put it on solid floor and close the lid can anybody with experience with this scale can help me figure out what is wrong

Thanks

 

The drifting with the cheaper scales can be a problem.  I use a tiny piece of jewelry that I have established the exact weight of by weighing it probably 100 times.  It weighs 134.0mg exactly.  When I am cutting a pill and weighing it, I record the number, then remove it from the scale and place my 134.0mg standard on the scale and see what it says.  If it says 133.3mg, then I know the scale is reading 0.7mg too low at this moment, for example.  So I subtract 0.7mg from whatever the cut pill weight was, and that is the weight.  It's very easy once you get the hang of it.

 

Your scale has to have at least decent repeatability for this to work well.  Some of those cheap scales can drift dramatically from 1 measurement to the next just a few seconds apart.  I usually return a scale that works that's poorly, and try to get one that only drifts very slowly. 

 

I should clarify that I am using a lab scale with high accuracy to 0.1mg.  But this also works fine with scales accurate to 1mg.

 

 

[[Br...]]

1) With my Gemini 20 that variance is normal.  1 minute can pass, weigh the exact same pill and often get a new weight which is .007 different than the first weighing.  I've seen older posts where people bought a 400 dollar scale which has the same issue.  To weigh with the accuracy of 1/1000 would take a high tech scientific lab to reproduce. In a short time I figured for 30 bucks from Amazon, the scale ain't bad. 

 

2) Each pill in the bottle will also have a slight weight variation as manufacturing cannot mass reproduce every pill with perfect accuracy.  The FDA recognizes this and has allowable variances. The drug manufacturers try to keep it around 5% or so.

 

When high accuracy is needed,  the liquid taper method would be recommended.