When installing an electromagnetic flowmeter, three core aspects must be focused on: flow field conditions, installation position, and environmental interference to avoid affecting measurement accuracy.
1. Ensure stable flow field
- The pipeline must operate with full medium, avoiding insufficient medium or gas phase space to prevent signal fluctuation.
- The straight pipe sections before and after the meter must meet requirements—usually 10 times the pipe diameter (10D) before and 5 times the pipe diameter (5D) after. Keep it away from flow-disturbing components such as elbows, tees, and valves.
- The medium flow rate should be within the meter’s rated range (generally 0.5-10m/s). Too low a flow rate is prone to noise interference, and too high may wear the lining.
2. Requirements for installation position and method
- Electrodes must be fully in contact with the medium. Horizontal installation is preferred (electrodes in the horizontal direction), avoiding vertical installation with electrodes facing up (air accumulation) or down (slag accumulation).
- Avoid positions prone to turbulence and bubbles such as pump outlets and control valves. If installation is necessary, add straight pipe sections or install flow stabilizers.
- The meter must be well grounded with an independent ground (ground resistance ＜10Ω). Do not share the ground with power equipment to prevent signal interference.
3. Avoid environmental interference
- Keep away from strong electromagnetic interference sources such as frequency converters, large motors, and high-voltage cables to prevent signal distortion.
- Install in a dry, well-ventilated environment. Avoid direct sunlight, high humidity, or corrosive gas environments to protect the converter and electronic components.
- Ensure the installation environment temperature is within the meter’s rated range to avoid affecting the performance of internal circuits and lining materials.
Post time: Oct-31-2025