Cheap scale test - part 1 repeatability

[JimSC]

Well I have a A&D 120 now and admit I like it the best of any scale I have used However for someone who does not want to spend a lot of money they can buy one of these little scales for less than $50 and still get repeatable accurate measurements. I have only had this one for 4 or 5 months but for the money it is the best scale I have owned. Other than the lack of a good draft shield and the auto shutoff it is a great scale

 

[Twoboxer]

[QUOTE="JimSC, post: 37444334, member: 1303667". . . ]I do realize that some scales are affected by line noise and florescent lighting , the Smartweigh Gem 20 is not. For $25 to $30 dollars in my opinion this is hands down an excellent little scale[/QUOTE]Respectfully, you and I will simply have to disagree. Strain gauge based scales are sensitive to noise.

According to your report, three strain gauge scales had no noise issues in your reloading room. That points more to the fact that your room has no significant noise issues. The problem with your KHR could well be sample defect or static electricity. Or something else.

 

[Fliers]

I saw a guy selling a light attachment for beam scales that auto trickled. Looked sweet but out of stock for awhile.

 

[sdean]

It is amazing to me the money and time and effort some will go through to not buy a FX120 to start with.

 

[JimSC]

="Twoboxer, post: 37444551, member: 1292368"][QUOTE="JimSC, post: 37444334, member: 1303667". . . ]I do realize that some scales are affected by line noise and florescent lighting , the Smartweigh Gem 20 is not. For $25 to $30 dollars in my opinion this is hands down an excellent little scale. Respectfully, you and I will simply have to disagree. Strain gauge based scales are sensitive to noise.

According to your report, three strain gauge scales had no noise issues in your reloading room. That points more to the fact that your room has no significant noise issues. The problem with your KHR could well be sample defect or static electricity. Or something else.

from my observations it was when the Tree KHR began drifting when the temperature dropped below 60F. It worked fine before the temperature dropped, worked fine afterwards but does need re calibrated when the the temperature changed. The only logical conclusion is that the temperature fluctuations affected it.

As far as electrical noise this is a 12 x 20 foot room at the end of a garage workshop with four sets of double florescent lights (8 total) in the ceiling, one chest freezer, one refrigerator. On th eother side of the wall there are 5 sets of quad florescents for a total of twenty lights. There is also a single florescent above a workbench and a LED light on my reloading bench.

Respectfully I think you need to read up on what electrical noise is and what causes it. There are tens of thousands of strain based scales operating every day in rooms everywhere with electrical noise. Some links


https://products.currentbyge.com/si...E-EMI-from-Electronic-Ballasts-Whitepaper.pdf


https://www.eetimes.com/document.asp?doc_id=1274125#

 

[Kracken McGraw]

It is amazing to me the money and time and effort some will go through to not buy a FX120 to start with.

I’m listening, feeding and fattening the piggy bank as we speak!

 

[JimSC]

It is amazing to me the money and time and effort some will go through to not buy a FX120 to start with.

Only reason I bought the FX 120 is I said if I found one for less than 500 shipped I would buy it and I just replaced all my barrels. Now I am in the middle of pimping out my reloading bench. Picked up a nice set of Starrett calipers and this scale last month, restocking powder this month and April a Harrels throw and press

I’m listening, feeding and fattening the piggy bank as we speak!

buy yourself a SmartWeigh Gem 20. Every bit as accurate and less than 30 bucks. Your ammo will not know the difference but you piggy bank sure will LOL

 

[BoydAllen]

If you are doing long range benchrest, then worrying about hundredths of a grain is appropriate, in the pursuit of your desired ES....but if you are shooting or even competing at short range, 100-200 yd., it is a waste of time. At those distances an ES of weight of .2 gr works just fine. Anyone who says differently needs to do a lot more research.

BTW the OP did not say that 5 gr. weighted on the scale he tested could be anywhere between 4.9 and 5.1. He said that was the case for typical reloading scales. His results for the scale that he tested were a spread of .04 gr. which would translate into 4.98 to 5.02.

When I read a favorable report of this scale in an earlier post, given that my delivered cost was $23 at the time, I decided to find out for myself. With repeated weighings of a full sized RCBS scale pan it shows a variation of +- .02 gr, and will work just fine for verifying powder measure settings and throw weights for short range benchrest shooting, where +-.1 will win matches and set records, or in my case, not impede the accuracy of my practice shooting.

For trickling I have several tuned beam scales that work fine. This is for a different purpose.