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An instrument found out of tolerance at calibration means that

  • A.nothing needs to be done beyond adjusting the instrument
  • B.measurements made with it since the last calibration must be reviewed
  • C.only measurements made after the calibration are affected
  • D.the instrument must be discarded and replaced immediately

Answer: B

The error was presumably present for some part of the interval, so anything the instrument was used to accept or reject has to be reconsidered. That obligation is why calibration records are kept with the test results.

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