Purpose of Calibration :

• The calibration of any measuring system is very important to get meaningful results.
• In the case where the sensing system and measuring system are different, then it is imperative to calibrate the system as an integrated whole in order to take into account the error producing properties of each component.
• Calibration is usually carried out by making adjustments such that the readout device produces zero output for zero-measured input, and similarly, it should display an output equivalent to the known measured input near the full-scale input value.

Calibration Process

• Preparation: This step involves ensuring that the device to be calibrated is properly cleaned and in good working condition and that all necessary tools and reference standards are available.
• Connection: The device to be calibrated is connected to the reference standard and any necessary test equipment is set up.
• Measurement: The device is then measured using the reference standard, and the readings are compared to the known values of the reference standard.
• Adjustment: If necessary, the device is adjusted to bring its readings into alignment with the reference standard. This may involve adjusting internal electronics or physical components or making changes to the device’s software or firmware.
• Documentation: The results of the calibration are documented, including the readings of the device before and after calibration, the reference standard used, and any adjustments made to the device.
• Verification: The device is then re-measured to verify that it is providing accurate and consistent readings, and to ensure that the calibration process was successful.
• Repeat: If necessary, the calibration process may be repeated several times to ensure that the device provides accurate readings.