This activity requires that a comparison is made between a known reference measurement the standard equipment and the measurement using your instrument test instrument.
Calibration of measuring instruments standards.
Calibration is the comparison of a measurement device an unknown against an equal or better standard.
Specific recalibration intervals depend on a number of factors including.
The process of calibration involves configuring an instrument to provide sample measurement results within an acceptable range.
A standard in a measurement is considered the reference.
In general nist does not require or recommend any set recalibration interval for measuring instruments devices or standards.
Iso 9001 2015 is focused on risk based thinking.
Calibration fi nds out how far the unknown is from the standard.
Accuracy requirements set by customers requirements set by contract or regulation.
Traceability is obtained by calibration establishing the relation between the indication of the measuring equipment and the value of a measurement standard which in turn has an established relation to the definition of the si unit also obtained by calibration.
Calibration is intrinsic in risk based thinking in1 3 3 inputs and outputs in 4 4 1 the necessary infrastructure to accomplish this in 7 1 3 measurement traceability in 7 1 5 2 the actual word calibration is mentioned and performance evaluation in 9 1 just to name a few.
Most professionals recommend using a calibration standard that is at least four times more accurate than the device being calibrated.
The good laboratory practices glps good measurement practices gmps and standard operating procedures sops that have not been updated are available on the linked pages as scanned pdf copies.
Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and covered mass length and volume calibrations for field standards used in the commercial marketplace.
The standard s accuracy varies depending on what is being calibrated.
The original table of contents and several legacy sections are provided here as reference only.
The difference between the measured value and standard value helps to determine the instrument performance.
Calibration standards are devices that are compared against less accurate devices to verify the performance of the less accurate devices.
Calibration of instruments and other measuring devices is done to verify its performance.
As per the results obtained from the readings obtained of the instrument and the sub standards the curve is plotted.
It is a comparison of the reading found from the instrument or measuring device and the known value or reference standard.
They must also be adjusted according to the instructions as provided by the manufacturer prior to being used to make accurate measurements.
