RCBS M500 - Magnetic Damping; How to Weigh


TheM500scaleisequippedwithmagneticdampingwhichcausesthebeamto
cometorestquicklywithoutaffectingsensitivityoraccuracy.Itoperatesonthe
principleofapermanentmagneticeldresistingthemotionofanon-magnetic
copperdampervaneattachedtothebeam.
Thedampingmagnetsarepositionedinsidethebaseonbothsidesoftheslotin
whichthedampervanetravels.
Theonlymaintenancerequiredistokeepthisslotfreeofmagneticparticleswhich
couldinterferewithfreemovementofthedampervane.Themagneticdampingis
effectiveatallloadsandwillspeedupweighing.

Toweighanunknownload,placetheloadinthescalepan.Movethemainpoiseto
therstnotch,whichcausesthebeampointertodropbelowthecenterreference
pointer,andthenmoveitbackonenotch.Thenmovethesmallpoisetothenotchto
bringthebeampointertothecenterreferencepointer.Theweightoftheunknown
loadisthesumofthetwopoisereadings(Photo23).
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Photo21:Toppointerat0.5grainsabovereferencetargetload
Photo22:Bottompointerat0.5grainsbelowreferencetargetload