What is Calibration?
Calibration is the comparing
of a measurement device (an unknown) against an equal or better standard. A standard in a measurement is
considered the reference; it is the one in the comparison taken to be the more correct of the two. One
calibrates to find out how far the unknown is from the standard.
A “typical” commercial
calibration references a manufactures calibration procedure and is performed with a reference standard at least
four times more accurate than the instrument under test.
Calibration is an Insurance
Some people consider
calibration a necessary annoyance to keep the auditor off their back. In fact, out of tolerance (OOT)
instruments may give false information leading to unreliable product, customer dissatisfaction and increased
warranty costs. In addition, OOT conditions may cause good products to fail tests, which ultimately results in
unnecessary rework costs and production delays.