Predictor (rev. 2.22)

An appropriate calibration interval for a measurement standard can be efficiently estimated using this software. 

Calibration interval estimates are actually a compromise. Too frequent calibrations are financially unfeasible, while infrequent calibration may result in lose of accuracy. This program, based on past calibration results and their uncertainties, forecasts the calendar date at which the sum of the standard's parameter deviation plus its uncertainty will reach a specified limit. This date provides the longest interval in which the measurement standard will be kept within specifications despite its natural aging and instability. Using the “deviation plus its uncertainty” for a test of compliance with specifications is in accordance with ILAC G8 document.

In addition, this program estimates changes in the standard's value due to drift since its last calibration. Using estimated drifts and their uncertainties in an uncertainty budget is an improvement over using data from an old calibration.

This is a time limited^*, trial version of the program in which the save feature has been disabled until the software is registered. The author has extensive metrology experience, having formerly been responsible for frequency and voltage standards at Israel's National Physical Laboratory.

^* Following installation, the program will run for 30 days before a code must be purchased to continue use.

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