MFE 201 Lecture Notes - Lecture 7: Gauge Block, Luminous Intensity, Ampere
31 Mar 2016
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Part 2 - measurement basics: seven base quantities (table 10-1, length (meter, mass (kilogram, time (second, electric current (ampere, thermodynamic (degree celsius, amount of substance (mole, luminous intensity (candle, secondary physical quantities (fig. Nd many of these physical units: engineering science courses are based on physics and chemistry, engineering science is the foundation for engineering design. Need to have a standard you can use for setting up for inspection and checking inspection devices for accuracy. Gage blocks are periodically checked by outside measurement labs. Target (a) is the example of feature that is both accurate and precise which, of course, it the goal. Target (b) is an example of process that precise, but not accurate. Precision is usually the harder of the two to achieve. Sometimes this type of situation can be xed by making adjustments, rather than changing processes. Target (c) is represents a process that has a good average, but has a lot of variation or dispersion.
