Key points for installing the three-rotor system

　　The three-rotor flowmeter is an instrument that indicates the measured flow rate and the total volume of fluid passing through over a selected time interval—it’s also an essential tool for accurately measuring the flow of liquids and gases. Proper installation of the three-rotor flowmeter is crucial to its performance. So, let’s now explore the key points for installing a three-rotor flowmeter.

　　The measurement principle of the three-rotor device is independent of flow characteristics; therefore, any turbulence and vortices present in non-measurement zones within the pipeline do not affect the measurement.

　　I. Key points for installing the three rotors:

　　1. The installation area must not have any significant sources of vibration. Additionally, to stabilize the piping near the instrument, reinforcement measures will be required.

　　2. Do not approach large transformers, electric motors, mechanical pumps, and other equipment that generate strong magnetic fields to avoid electromagnetic interference;

　　3. When connecting the sensor to the pipeline, ensure full-tube operation and install it vertically.

　　4. The transmitter housing can be grounded by connecting it directly to the grounding grid. For the shielded cable (split type), follow the instructions provided in the manual: connect the signal cable to the system, ensuring that the shield layer is grounded at one end of the system. Additionally, the measurement sensor connected to the pipeline’s short-circuit ring must also be grounded, with a grounding resistance lower than 10 ohms—and this ground connection must not share the same grounding system as electrical equipment.

　　5. A straight pipe section of approximately 5D to 10D should also be maintained upstream of the flow meter sensor.

　　II. Detailed information on the installation of the second and third rotors is as follows:

　　1. Steady-state eddies within the measurement zone can affect both the stability and accuracy of the measurement; therefore, you can either extend the lengths of the upstream and downstream straight pipe sections, install a flow stabilizer, or reduce the cross-sectional area at the measurement point to ensure a stable velocity distribution.

　　2. The flowmeter can be installed horizontally or vertically, but care should be taken to avoid sediment and air bubbles from affecting the measuring electrodes. Ideally, the electrode axis should remain horizontal. When installed vertically, the fluid should flow from bottom to top. Additionally, the sensor must not be placed at a pipe bend or other locations where bubbles tend to accumulate.

　　3. Do not allow the flow sensor to operate in a non-full-pipe condition while the measurement is being taken, as this may affect accuracy.

　　4. When the piping is not fully filled or the outlet is vented, please install the sensor on the rainbow suction tube.

　　5. The standard straight pipe section requirement for electromagnetic flowmeters is 10D upstream and 5D downstream. However, if there are bends or valves present, additional, specific requirements apply.

　　III. Reasons for Grounding the Three-Rotor Flow Meter:

　　1. The measuring electrodes inside the electromagnetic flowmeter are located within a DC or AC electric field. If the surrounding environment lacks effective shielding against interference, it can severely disrupt the measurement process.

　　2. Whether the sensor housing is properly grounded directly affects the accuracy and stability of measurements, so it’s crucial to prevent noise voltage from being transferred to the ground wire. As a result, electromagnetic flowmeters require a highly reliable grounding system. Without proper grounding shielding, interference currents can easily be generated.

　　These are the key points for installing the three-rotor system. If you’d like to learn more, feel free to reach out to us anytime! Our company boasts years of experience and looks forward to having you join us.