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Flatness is a unilateral tolerance not to exceed .0015 with 0 being perfection. There is no lower specification limit. To calculate your Cpk, subtract the average from .0015 and divide by 3 estimated standard deviations;
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www.eng-tips.com/viewthread.cfm?qid=209009&page=6
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This is NOT the same as flatness. The flatness specification states that all points on the surface shall lie between two parallel planes separated by "X" ...
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www.angrave.com/catalog/SurfacePlates.html
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Subject: ATM Re: Diagonal Flatness Specification ... How is flatness measured and reported for the small elliptical diagonals used on Newts? Flatness of large optical flats can determined by counting interference fringes across the diameter of two flats in the presence of monochromatic light.
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astro.umsystem.edu/atm/ARCHIVES/JUL97/msg00651.html
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Altera® follows JEDEC standard (JESD22-B108A) for coplanarity (flatness from edge to edge). ... For further information, refer to Coplanarity Test for Surface-Mount Semiconductor Devices (PDF).
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www.altera.com/support/kdb/solutions/rd01222008_246.htm...
www.altera.com/support/kdb/solutions/rd01222008_246.html
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Generic specification; Baseplate flatness of power modules; Advanced Power Technology Europe; Chemin de Magret; 33 700 Mérignac, France; ... Otherwise indicated on the module datasheet, the baseplate flatness is defined by the following : Overall convex shape : Module is designed to get an overall convex shape of...
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www.microsemi.com/micnotes/APT0503.pdf
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Flatness Testing; With over twenty years of experience in floor flatness measuring systems, Face Consultants are world leaders in the surveying of warehouse floors and the first to be approved by the United Kingdom Accreditation Service (UKAS).;
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www.face-consultants.com/
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Flatness Testing, Face Consultants use the latest in digital measuring equipment, designed and built at our UK headquarters, to check both Defined and Free Movement floors to either TR34, DIN or the American F number specifications. ... Services & Products: Floor Flatness : Flatness Testing...
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www.face-consultants.com/flatness-testing/flatness-test...
www.face-consultants.com/flatness-testing/flatness-testing.aspx
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The AD811 is a wideband current-feedback operational amplifier, optimized for broadcast quality video systems. The -3 dB bandwidth of 120 MHz at a gain of +2 and differential gain and phase of 0.01% and 0.01° (RL = 150 W) make the AD811 an excellent choice for all video systems. ... Pin Configuration for AD811;
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www.analog.com/en/amplifiers-and-comparators/operationa...
www.analog.com/en/amplifiers-and-comparators/operational-amplifiers-op-amps/AD811/products/product.html
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Uncompromised Quality in Maple Flooring for 100 Years. ... If the above conditions are not met during all Ff/Fl Number measurements, MFMA does not recommend the acceptance of any Ff/Fl test results. MFMA's standard 1/8" in 10' radius flatness specification should be enforced.
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www.maplefloor.org/faq/f1.htm
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