Determining Calibration Frequency
The calibration of a measuring tool, instrument, or master compares a measurement reading from the calibrated item with a known value from a reference instrument or standard. Variations between the reading and the known value determine the performance limitations of the tool, instrument, or master.
Inception of Calibration
It is often a good policy to calibrate measuring instruments before their first use; this will establish a measurement history for future reference and comparison. Tracking the calibration history of an instrument and how long it has remained within the specification limits will help make decisions about future calibration frequencies or intervals.
What Goes Into a Calibration Schedule?
Shorter intervals between calibrations may reduce the risk of questionable measurements. When determining the frequency of calibration, consider factors that may affect measurement accuracy:
- Usage patterns of the instrument are the driving factor in calibration: the more regular the usage, the more frequent the calibration.
- Environmental conditions (e.g., humidity, temperature, vibration) where the instrument is stored and used.
- The required uncertainty in measurement.
- Any special requirements of your company’s quality control program may necessitate more frequent calibration.
Laboratory Testing Inc. has its full-service calibration lab called LTI Metrology to keep all of your measuring instruments in optimal condition and performing accurately. Contact us to order new instruments and parts or to schedule calibration services.
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