1Solution flowmeteroverview
The OW-LWGY turbine flowmeter is composed of a turbine flow sensor and a display instrument. It is manufactured using advanced foreign technology and is one of the most ideal flowmeters for liquid measurement. The solution flowmeter has the characteristics of simple structure, high accuracy, and easy installation, maintenance, and use. This product is widely used in the fields of petroleum, chemical, metallurgy, water supply, papermaking, environmental protection, food, etc. It is suitable for measuring liquids in closed pipelines that do not corrode stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, hard alloys, and have no impurities such as fibers or particles. If used in conjunction with display instruments with special functions, it can be used for automatic quantitative control, over limit alarm, and other purposes.
2、 Product features:
1. The sensor is a hard alloy bearing thrust type, which not only ensures accuracy but also improves wear resistance.
2. The structure is simple, sturdy, and easy to disassemble and assemble.
3. Wide measurement range and low lower limit flow rate.
4. Low pressure loss, good repeatability, and high accuracy.
5. Has high resistance to electromagnetic interference and vibration.
3、 Working principle:
The fluid flows through the sensor housing. Due to the angle between the blades of the impeller and the flow direction, the impulse of the fluid causes the blades to have a rotational torque. After overcoming the friction torque and fluid resistance, the blades rotate. After the torque is balanced, the speed is stable. Under certain conditions, the speed is proportional to the flow rate. Due to the magnetic conductivity of the blades, they are in the magnetic field of the signal detector (composed of permanent magnet and coil). The rotating blades cut the magnetic field lines and periodically change the magnetic flux of the coil, causing electrical pulse signals to be induced at both ends of the coil. This signal is amplified and shaped by the amplifier, forming a continuous rectangular pulse wave with a certain amplitude, which can be transmitted far to the display instrument to display the instantaneous flow rate and cumulative amount of the fluid. Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow rate Q of the fluid flowing through the sensor, and the flow equation is:
Q=3600×f/k;
In the formula:
F - Pulse frequency [Hz];
K - the instrument coefficient of the sensor [1/m3], given by the calibration sheet. If [1/L] is used as the unit
Q - instantaneous flow rate of fluid (in working condition) [m3/h];
3600- Conversion factor.
The instrument coefficient of each sensor is filled in the calibration certificate by the manufacturer, and the k value is set in the matching display instrument to display the instantaneous flow rate and cumulative total amount.
4、 Main technical performance:
1. Nominal diameter: (4-200) mm. Basic parameters are shown in Table 1;
2. Medium temperature: (-20~80) ℃, (-20~120) ℃;
3. Environmental temperature: (-20~55) ℃;
4. Accuracy: ± 0.2%, ± 0.5%, ± 1%;
5. Detector signal transmission line system: three wire voltage pulse (three core shielded cable);
6. Power supply: Voltage: 12V ± 0.144V, Current: ≤ 10mA；
7. Output voltage amplitude: High level ≥ 8V, low level ≤ 0.8V;
8. Transmission distance: The distance from the sensor to the display instrument can reach 250 meters;
9. On site display power supply: 3V (powered by lithium battery, can be used continuously for 3 years);
10. Display mode: On site LCD displays instantaneous flow and cumulative flow;
11. On site display with signal output power supply: 24V; 4-20mA two-wire current output, with a remote transmission distance of 500 meters.

5Solution flowmeteruse
When using, the tested liquid should be kept clean and free of impurities such as fibers and particles.
When using the sensor, it should be slowly filled with liquid before opening the outlet valve (which should be installed at the back of the flowmeter). Sensing is strictly prohibited
When the device is in a liquid free state, it is subjected to the impact of high-speed fluid.
The maintenance cycle of sensors is generally six months. During maintenance and cleaning, please be careful not to damage the parts inside the measuring chamber, especially the impeller. Please pay attention to the guide components and impeller during assembly
The positional relationship.
When the sensor is not in use, the internal liquid should be cleaned, dried, and protective covers should be added at both ends of the sensor to prevent dust and dirt from entering, and then stored in a dry place. (This item
Very important)
◆ The matched filter should be cleaned regularly. When not in use, the liquid inside should be cleaned. Like the sensor, it should be sealed with a dust boot and stored in a dry place.
The transmission cable of the sensor can be laid overhead or buried underground (iron pipes should be covered when buried underground)
Before installing the sensor, connect the wires to the display instrument or oscilloscope, turn on the power, blow or manually turn the impeller with the mouth to quickly rotate and observe whether there is a display. When there is a display
Install the sensor when necessary. If there is no display, check the relevant parts and eliminate the fault.