Master/process gauge calibrations involve verifying and adjusting the accuracy of pressure, temperature, or other process gauges used as reference or operational instruments in industrial systems. These calibrations compare the gauge readings against a certified master standard under controlled conditions to ensure precision and reliability. Accurate gauges are essential for safe and efficient process control, preventing equipment damage, and maintaining compliance with industry standards and regulatory requirements. Calibration typically includes documenting deviations, making necessary adjustments, and providing traceable records for quality assurance and operational accountability.