Define: i) Calibration ii) Traceability

Define: i) Calibration ii) Traceability
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i) Calibration: Comparison of an unknown quantity to a known standard quantity. 

ii) Traceability: It is defined as an unbroken chain of comparisons relating an instrument's measurements to a known standard. Calibration to a traceable standard can be used to determine an instrument's bias, precision, and accuracy.
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