When should you check the calibration of a measuring instrument?

Checking the calibration of a measuring instrument before each use ensures the accuracy and reliability of measurements taken with that instrument. This practice is crucial in many fields, particularly in mechanical technology, where precise measurements can affect quality control, operational efficiency, and safety. Instruments can drift in accuracy over time due to various factors, including environmental conditions, wear and tear, and mechanical shock. By verifying calibration prior to each use, you can confirm that the instrument is providing reliable and accurate readings, thereby helping to prevent errors that could lead to faulty decisions or processes.

While other intervals such as monthly, annually, or only after damage might seem practical, they do not provide the same assurance of accuracy as checking right before use. Monthly checks may miss errors that arise in between, annual checks could allow significant errors to persist for a long time, and only checking when damage is suspected can lead to serious liabilities. Therefore, regularly verifying calibration before measurement activities is the best approach to maintain accuracy in applications involving precise engineering and mechanical tasks.