Conventionalaccuracy specification

Accuracy specification Accuracy specification for 18-28 °C for 18-28 °C
Normally, manufacturers specify the accuracy oftheir machines for 20 °C. If the temperaturechanges, the specified accuracy no longerapplies. Therefore, Carl Zeiss has already speci- fied the accuracy for a temperature range (e.g. from 18 °C to 28 °C) in the past. A machine’s accuracy is guaranteed for this range. Althoughthe accuracy is indicated for a wide range, theworst possible ambient conditions are always assumed. In practice, however, such tempera- tures do not always exist. This means that your measuring machine manufacturer may be measuring withmuch higher accuracy, but you don’t know exactly how accurately!

Precision