What maintenance activity is typically performed on flow meters to ensure accuracy?

• A. Calibration
• B. Replacement
• C. Cleaning
• D. Inspection

Answer: (A)

Calibration is the maintenance activity that directly ensures flow meter accuracy. It involves comparing the meter’s readings to a known reference flow and adjusting the instrument so its output matches the standard across the operating range. This corrects drift from aging, temperature effects, or wear, keeping measurements within the specified tolerance. Cleaning can help if buildup affects readings, but it doesn’t verify or adjust accuracy across the measurement range. Inspection checks condition and installation, not the actual accuracy. Replacement is for devices or components that can’t be brought back into spec. Regular calibration, as recommended by the manufacturer or regulations, keeps flow measurements reliable for process control and reporting.