Metrology Assures Quality Resistance Measurements
Posted @ 11/1/2015 9:24 AM
Measurements need a documented chain of traceability to a national standards laboratory to prove their validity. See how the calibration lab at Keithley Instruments maintains traceability in its resistance measurements.
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At its essence, calibration is a comparison of a measurement instrument against some reference standard that had better uncertainty. Measurement validity means that the equipment used to make these comparisons are in an unbroken chain of comparisons, traceable to some known standard. In the US, that chain starts with NIST.