Calibration ‐ It is a process of estimating the value of a quantity by comparing that quantity with a standard quantity.
Need of calibration: ‐ Calibration defines the accuracy and quality of measurement recorded using a piece of equipment. Over time there is a tendency for result and accuracy to drift particularly using measuring particular parameters such as temperature and humidity. To be better result being measured there is an ongoing need to service and maintain the calibration of equipment throughout its lifetime for reliable, accurate and repeatable measurement. The aim of calibration is to minimize any measurement uncertainty by ensuring the accuracy of test equipment.