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Rifles, Reloading, Optics, Equipment
Reloading
Electronic scale tips to ensure accuracy
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<blockquote data-quote="johnnyk" data-source="post: 1504105" data-attributes="member: 307"><p>I am scale technician by trade, so I see scales; all day, every day. I adjust them, calibrate and repair them, from the huge rail scales (400,000lb) to the micro-gram level Lab balances (.00001g). I absolutely prefer electronic over mechanical scales anytime.</p><p>You seem to be aware of the normal culprits that cause inconsistencies in weighing masses (RFI, fluorescent lights, wayward breezes, etc.) but there are more subtle ones that people don't see. These we call "uncertainties" and they add up accumulatively. Hence the reason for tolerances.</p><p>I'll list a couple to kind of get you thinking about what you're up against. First off let's start with the electronics. Where and by whom they were made makes a difference. Cheap electronics result in less than stellar results. Lab's can't afford less than perfect electronics. When I say "perfect" I mean absolutely accurate, consistent and repeatable throughout it's working range. </p><p>Next, look at the human operating the scale. Does he/she know it's capabilities and limitation's? What class weight standard should be used to calibrate it? By the way, the copper and brass weights supplied with most non-industrial scales are not allowed by W&M, as they are porous.</p><p>What class is the scale, IV, IIIL, III, II, I and what degree of accuracy can be expected from it? A scale must be calibrated with a weight of a higher class or you're spinning your wheels. </p><p>Scales are like optics. Buy once, cry one.</p></blockquote><p></p>
[QUOTE="johnnyk, post: 1504105, member: 307"] I am scale technician by trade, so I see scales; all day, every day. I adjust them, calibrate and repair them, from the huge rail scales (400,000lb) to the micro-gram level Lab balances (.00001g). I absolutely prefer electronic over mechanical scales anytime. You seem to be aware of the normal culprits that cause inconsistencies in weighing masses (RFI, fluorescent lights, wayward breezes, etc.) but there are more subtle ones that people don't see. These we call "uncertainties" and they add up accumulatively. Hence the reason for tolerances. I'll list a couple to kind of get you thinking about what you're up against. First off let's start with the electronics. Where and by whom they were made makes a difference. Cheap electronics result in less than stellar results. Lab's can't afford less than perfect electronics. When I say "perfect" I mean absolutely accurate, consistent and repeatable throughout it's working range. Next, look at the human operating the scale. Does he/she know it's capabilities and limitation's? What class weight standard should be used to calibrate it? By the way, the copper and brass weights supplied with most non-industrial scales are not allowed by W&M, as they are porous. What class is the scale, IV, IIIL, III, II, I and what degree of accuracy can be expected from it? A scale must be calibrated with a weight of a higher class or you're spinning your wheels. Scales are like optics. Buy once, cry one. [/QUOTE]
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Reloading
Electronic scale tips to ensure accuracy
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