LUXQ Intelligent Gas Precession Vortex Flowmeter

Features

■No mechanical movable parts, not easy to corrode, stable and reliable, long life, no special maintenance for long-term operation;

■Use 16-bit computer chip, high integration, small volume, good performance, strong machine function;

■Intelligent type flowmeter integrates flow probe, microprocessor, pressure and temperature sensor. It uses built-in combination to make the structure more compact. It can directly measure the flow, pressure and temperature of the fluid, and automatically track the compensation and compression factor correction in real time.

■Use double detection technology, it can effectively improve the detection signal strength and suppress the interference caused by pipe vibration;

■Use domestic leading intelligent aseismic technology, effectively suppressing interference signals caused by vibration and pressure fluctuations;

■Use Chinese character dot matrix display, the display has many digits, the reading is intuitive and convenient, and can directly display the volume flow under working condition;

■ Volume flow, total amount, and medium pressure, temperature and other parameters under standard condition;

■Use EEPROM technology,  easy to set up the parameters, can be saved permanently, and can save historical data up to one year ;

■The converter can output frequency pulse, 4~20mA analog signal, and has RS485 interface, which can directly communicate with the microcomputer. The transmission distance can reach 1.2km;

■Multiple physical parameter alarm output, which can be selected by the user;

■The meter head can rotate by 350 degrees, which is easy to install and use;

Flow meter selection                                                                                           Table 1

In the selection process,it shall grasp two principles : namely, one must ensure the safety of production, and the other must ensure the accuracy of use. To this end, three selection parameters must be implemented, namely the maximum, minimum and common flow rates in the near and long term (mainly used for the selected meter nominal diameter) and the design pressure of the measured medium (mainly used for the Nominal pressure rating of the selected meter). ), actual working pressure (mainly used to select the pressure grade of the meter pressure sensor).

a. When the measured flow rate is the working condition volume flow rate, the adapted nominal diameter can be directly selected according to the flow range in the table;

b. When the measured flow rate is the standard condition volume flow, the standard volume flow QN shall be converted into the working condition volume flow Qv,and  then select the corresponding nominal diameter according to the flow range in the technical parameters table;

c. When both caliber flowmeters can cover the minimum and maximum volume flow, the caliber should be Selected as much as possible under the pressure loss;

d. Do not make the actual minimum flow Qmin lower than the lower flow limit of the selected nominal diameter flowmeter;

e.Flow range, nominal pressure can be ordered when there are special requirements.

F. The selection formula is as follows:

Flowmeter Dimensions and Installation Dimensions

The external dimensions of the flowmeter are shown in Figure 3. The unmarked dimensions in the figure are listed in Table 1. The flowmeter use flange connection and implement the GB/T9112~9113-2000 standard.

 Table 2                                                                                                                unit：mm

■Installation Precautions

1. The sensor can be installed in the vertical, horizontal or any inclined position according to the flow direction mark;

2. When the pipe is long or close to the vibration source, support should be installed on the upstream and downstream of the flowmeter to eliminate the influence of pipe vibration;

3. The installation location of the sensor shall have sufficient space to facilitate the inspection and maintenance of the flowmeter and meet the environmental requirements of the flowmeter;

4. Avoid interference from strong external magnetic fields;

5. When installing and using outdoors, there shall be cover to avoid sun exposure and rain erosion, which will affect the service life of the meter;

6. When testing the pipe, pay attention to the pressure measurement range of the pressure sensor configured by the intelligent flowmeter to avoid overpressure and damage the pressure sensor;

7.Pay attention to the impact of installation stress, the upstream and downstream pipe installed in the flowmeter should be coaxial, otherwise it will produce shear stress. The position of the flowmeter should take into account the thickness of the gasket or to install an elastic expansion joint on the downstream side;

8. Before installing the flowmeter, remove the welding slag and other debris;

9. When the machine is in operation, the upper and lower valves of the flowmeter should be slowly opened to prevent the instantaneous airflow from damaging spiral flow generator;

10. When the flowmeter needs to transmit signal remotely, it shall be connected to the external power supply (1224) VDC strictly according to the requirements of “Electrical Performance Index”. It is strictly forbidden to directly connect 220VAC or 380VAC power supply to the signal output port;

11. The user shall not change the wiring mode of the explosion-proof system and arbitrarily twist each output lead connector;

12. When the flowmeter is in operation, it is not allowed to open the back cover to change the meter parameters, otherwise it will affect the normal operation of the flowmeter;

13. Check the leakage at the flange of the flowmeter regularly.