Powermac/All,
I am debating weather to get a 2nd Gempro 250, or the FX-120I. Can you tell me what you like about the FX-120I? Obviously, the FX-120I will be more reliable, but having 2 Gempros will take care of that.
Does the FX-120I function any better than the Gempro? The Gempro is ok, but measuring trickle charges is slow.
Thanks...
First off it is a lot more reliable as mentioned.
Has a good 5 year warranty.
The Gempro uses strain gauge weigh cells, and have anti drift software that works against it's accuracy, and contributes to it's slow speed, the software kind of chooses the closest weight and shows it being stable, while sometimes it is not. To explain it simply.
The Fx-120i weigh cells are of the magnetic force restoration type, and has no counterproductive software, it registers the correct weight instantly.
A strain gauge balance like that, does not reliably measure a kernel or two of powder, and it drifts.
There has been a lot of bad Gempros made and a lot of warranty issues, some won't stop drifting without using only DC input etc.
The FX is a lot faster and accurate, it also has a draft shield to counter airflows that can affect the balance.
I weigh my charges to a kernel or two, and use the tube of the Omega trickler under one side of the draft shield to make a stable enviornment as possible.
A few other useful tools are weight certified pan/scoups, that i use with my CM's that have the exact same weight so they auto dispense while i drop the powder through the drop tube.
And a certified calibration weight should be used to calibrate every time you turn it on for use.
Also with any accurate balances you should attach some ferrite cores to the power cords.
A picture says more then a thousand words they say, so watch the video and learn.
Same model range of balance just different technology, the video quite clearly shows the difference.
And both these scales are of considerably higher quality then the Gempro.
http://www.youtube.com/watch?v=89BOlViQXto
Digital Scales: GemPro 500, AY123, Sartorius GD503 within AccurateShooter.com
I will admit i am not a real expert on balances, i know a thing or two though, and i happen to come across such equipment at work from time to time, along with being a bit OCD when it comes to reloading.
Make a call to the guys making the video (balances.com) they make a living of selling balances and are more qualified then me to answer your questions, they will be able to answer any question you've got.
If you only keep your charges to +/- 0.1 grains the Gempro should be able to do that reliably, as long as you have not got a lemon.
The 0.02 grain accuracy is quite questionable though, something the test in the article i linked also indicates.