
Once a Year: On-Site Verification Procedures for Transmitter Zero and Span Adjustment
Process transmitters, including pressure, differential pressure and level transmitters, serve as core signal sources for industrial process control systems. Affected by long-term temperature drift, mechanical stress, medium corrosion and aging of electronic components, their zero point and span will gradually deviate after one year of continuous operation, leading to inaccurate process data and biased automatic control.



