Digital multimeter (DMM) calibration involves verifying and adjusting the accuracy of a multimeter, a versatile instrument used to measure voltage, current, and resistance in electrical circuits. The process includes comparing the meter’s readings against certified reference standards across its measurement ranges, inspecting for mechanical or electrical issues, and making necessary adjustments to correct deviations. Regular calibration ensures precise and reliable measurements, supports troubleshooting and testing in electrical and electronic systems, maintains compliance with industry and regulatory standards, and provides traceable records for quality assurance and equipment maintenance.