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A&D EJ123?

XL105

Silver $$ Contributor
I just received and started using the scale. The issue I’m having is the tarred zero floating. I put my pan on it, zero the -102.06 weight. Weighed a bunch of charges and noticed my zero is floating. -102.04, -102.02, -102.00. Recheck my charges and they are following the floating zero, meaning they no longer read what it had originally been weighed to. I tried a a different outlet, then tried turning of the lights.
How do I minimize the floating?
 
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The specs of the EJ-123 state repeatability, SD of 0.003 grams (0.046 grains).
That's SD not Extreme Spread.
www.scalesgalore.com

AND Weighing EJ series NEWTON Compact Balances

The EJ Newton precision compact balances offer a multitude of features for a diverse variety of weighing applications. The Newton provides the performance that users have come to expect from A&D. Quick response, reliability, and alkaline battery powered portability make the Newton a balance that...
www.scalesgalore.com
Auto zero can be turned on or off.
 
Rocketvapor said:
The specs of the EJ-123 state repeatability, SD of 0.003 grams (0.046 grains).
That's SD not Extreme Spread.
www.scalesgalore.com

AND Weighing EJ series NEWTON Compact Balances

The EJ Newton precision compact balances offer a multitude of features for a diverse variety of weighing applications. The Newton provides the performance that users have come to expect from A&D. Quick response, reliability, and alkaline battery powered portability make the Newton a balance that...
www.scalesgalore.com
Click to expand...

So you’re saying that it should be close enough for the girls I go out with?
 
I would tare your pan and weight a check weight close to your target powder load.
Calibration @ 100 grams doesn't really tell you much about weights near 3 to 5 grams.
While a U.S. Nickle is sort of 5 grams, pick one and don't lose it.
Run a drift check over a reasonable time period (maybe an hour).
THEN, run it like you were charging multiple cases (repeat the nickle measurement over and over).
What you are looking for is the max/min over time. If it continues to climb (or drop) that's bad.
If it drifts up a little then down then up then down, oh well, that's the best you will get.
Try it with auto zero off and again with it on.
See pdf manual.
Do a really good evaluation of your environment.
 
One way to avoid that is to only zero your pan to get your initial charge weight. Once you get your charge weight, zero the scale again and put the pan and charge back on the scale. This (weight of pan + charge) is your new target weight for the rest of your charges.
 
This is my weights of charges I did.
Target weight 40.0
39.92
39.88
39.92
39.92
39.84
Seems excessive?

*edit the error in charge weight
 
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I went with the EJ-54D2, when ScalesGalore had it on sale.
5 times the resolution on the low range. Repeatability is listed the same as the FX-120i (on high range)
Better on the low range.
I can see medium to large granules of fine ball powder. Small granules sometimes don't bump up to the next count :)
 
Something wrong with those readings.
Try the nickle test
The EJ-123 is a pretty good (not great) milligram scale that should be good to a couple counts with a decent draft free temperature stable environment. You should not have to jump through a bunch of updates/ upgrades to get stable and repeatable readings.
And remember, you cannot evaluate the performance of a scale without either appropriate check weights near the target weight, or another BETTER SCALE.
:)
I check my scales with good weights.
10gram-test.jpg

Not as bad as it looks. Certificate states this 10 gram weight is 10.000016 grams.
 
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Rocketvapor said:
I went with the EJ-54D2, when ScalesGalore had it on sale.
5 times the resolution on the low range. Repeatability is listed the same as the FX-120i (on high range)
Better on the low range.
I can see medium to large granules of fine ball powder. Small granules sometimes don't bump up to the next count :)
Click to expand...
I already spent more than I should! Someday I will own the 120i.
I really just wanted a good reliable .01 grain resolution scale.
 
Rocketvapor said:
Something wrong with those readings.
Try the nickle test
The EJ-123 is a pretty good (not great) milligram scale that should be good to a couple counts with a decent draft free temperature stable environment. You should not have to jump through a bunch of updates/ upgrades to get stable and repeatable readings.
And remember, you cannot evaluate the performance of a scale without either appropriate check weights near the target weight, or another BETTER SCALE.
:)
I check my scales with good weights.
View attachment 1481766

Not as bad as it looks. Certificate states this 10 gram weight is 10.000016 grams.
Click to expand...

We have a scale at work with .0004 resolution. I brought my cheap check weights in and checked them. So I do have reliable numbers for the weights. That scale gets checked by an outside company every few months.
 
Is that 0.0004 GRAM resolution?
That's marginally better than your milligram scale.
But, at least the check weights will be stable, and useful if close to your target weight.
 
XL105 said:
We have a scale at work with .0004 resolution. I brought my cheap check weights in and checked them. So I do have reliable numbers for the weights. That scale gets checked by an outside company every few months.
Click to expand...
When you think it’s drifting, place a small check weight in the pan for conformation.
If it is drifting to the amount you are reporting, I doubt any of the technics suggested here will satisfy you.
 
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