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Posted: 4/21/2012 5:12:46 PM EDT
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Ran into something weird with my RCBS 10-10 scale. I had bought it some time ago and exchanged it several times with RCBS for a replacement due to the scale not weighing my RCBS check weights accurately (off as much as 2 to 3 grains). According to my RCBS Chargemaster the checkweights all weigh as labeled.
With the 10-10 when I dump a charge in below the target weight and then trickle it up - it is showing accurate (as double checked in my Chargemaster). Any ideas why the scale would not show an accurate reading with the checkweights yet when weighing a charge it does? FYI - the scale is sitting on a leveled granite counter top. Thanks |
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When the beam balance scale is zeroed, the beam needs to be level to earth horizon or 90 degrees to plumb. Also, it needs to be level in the direction 90 degrees from the beam in the horizontal (weighing pan attached). When you get that set, adjust the leveling foot to move the frame zero mark adjacent to the beam pointer.
When you get ready to use the check weights, set the beam slides to the indicated check weight value, and apply it to the center of the weighing pan. The beam should oscillate only one to three times with the magnetic damper working properly. Keep the fulcrum area and the beam paraphenalia clean of dust, with an artists paint brush or something similar. |
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Quoted:
When the beam balance scale is zeroed, the beam needs to be level to earth horizon or 90 degrees to plumb. Also, it needs to be level in the direction 90 degrees from the beam in the horizontal (weighing pan attached). When you get that set, adjust the leveling foot to move the frame zero mark adjacent to the beam pointer. When you get ready to use the check weights, set the beam slides to the indicated check weight value, and apply it to the center of the weighing pan. The beam should oscillate only one to three times with the magnetic damper working properly. Keep the fulcrum area and the beam paraphenalia clean of dust, with an artists paint brush or something similar. Like he says above, both the scale body AND the beam need to be level. If it isn't, then you can add or subtract weight from the pan holder to level, also IPA and Q-tip will clean the pivot points. Make sure the knife edges are sharp and not dinged and the beam is not bent. 'Borg |
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