Logical And Cost Effective Calibration Intervals

Abstract

Periodic calibration does not prevent out-of-tolerances from occurring, but with a well-managed recall program, the risk can be minimized. Managing calibration recall intervals can be a perplexing task and sometimes seem somewhat arbitrary. Do I use the manufacturer's recommended interval? Do I use the ever so popular, yet arbitrary 12-month interval? Or, do I just use the interval that was used last time my unit was calibrated? Selecting an interval that is too long could save on excessive calibration costs, however it could also introduce the additional unwanted risk of using an out of tolerance item. An interval that is too short would eliminate that risk, but calibration costs will rise. The goal is to have the perfect Goldilocks situation to find an interval that is just right. One that will reduce calibration costs, yet still give you confidence that it will still be in-tolerance at the next calibration event. A simple examination of past calibration history, combined with a few strategic confidence checks will make managing recall intervals logical and cost effective.