UltraClass

If I look at an ASTM E 617 chart you will see Class 0, 1, 2 but I don't see a UltraClass. Troemner came up with UltraClass, Ultra class tolerance is the same as Class 0. The only difference is UltraClass is a two piece construction with an adjustment cavity. Class 0 is one piece construction. Troemner created Ultra Class so customers could send their weights in for calibration where Troemner can adjust by adding fill. Since Class 0 is one piece construction with no adjustment cavity once this weight is out of tolerance it has to be replaced. A common question is if someone is following an SOP and it states calibrate with Class 0 weight would they be in compliance if they used Troemner UltraClass weight? They would not be in compliance, Class 0 one piece - ultra class two piece.

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