Flow meter calibration is the process of verifying and adjusting a flow meter to ensure its measurements of liquid or gas flow are accurate and reliable. It involves comparing the meter’s readings against a known standard or reference under controlled conditions and making necessary adjustments. Regular calibration helps maintain measurement precision, ensures compliance with industry standards, prevents costly errors in process control, and extends the lifespan of the flow meter. Proper documentation of calibration results is essential for quality assurance and regulatory purposes.