Vibration Test Slide (FOE PPL Dot Pattern)
Stage Test Slide for Foepple Dot Vibration Test Pattern with Pairs of Dots which appear to merge into a single slot during vibration tests
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The amount of vibration of the slide in the appropriate axis is determined by the pair of dots which appear to merge into a single dot. The pattern on the S25 is an array of 20 pairs of dots converging on a single dot. The distance between each dot pair increases by 0.001 inch to a maximum of 00.2 inches, pairs being equispaced 0.25 inch.
76 x 26mm