Repeatability is when close to identical results are produced after multiple measurements and there is no change in the conditions for all the results. In essence, it is the ability of the instrument to “group” the results, as in target shooting or darts. A highly repeatable instrument doesn’t necessarily mean that it is then accurate. For example, a temperature sensor could consistently be reading 5 degrees off every single time a measurement is taken. But if it is 5 degrees off every single time, calibration can come into play and turn a highly repeatable instrument into one that is highly accurate after the identified and consistent degree of separation from the actual temperature is accounted for.