What are the important parameters that need to be considered in using a PD flow meter?

When using a positive displacement (PD) flow meter, important parameters to consider include the fluid properties (such as viscosity, temperature, and density), as these can affect measurement accuracy. The flow rate and pressure conditions are also critical, as PD meters are best suited for specific flow ranges and may have limitations under varying pressures. Additionally, the installation location and alignment are crucial to ensure proper operation and minimize measurement errors. Regular maintenance and calibration are essential for maintaining the accuracy and reliability of the flow meter.