Pressure and temperature selection
The actual working pressure of the fluid in the pipeline should be less than the rated working pressure of the flowmeter. Pay attention to whether there is negative pressure in the pipeline, such as the evaporation process, and the negative pressure is up to -60KPa. Such working conditions should be communicated with the manufacturer's technicians when ordering. Strict requirements are imposed on the lining material. The actual temperature should meet the temperature requirements specified by the flowmeter.
Power supply selection
The choice of the electromagnetic flowmeter power supply should be selected according to the flowmeter itself and the environment of the site. If the site allows, the power supply is convenient, safe and easy to maintain. As a chemical company, more than 90% of the raw materials and process links are in the liquid phase. During operation, the internal humidity of the workshop is large, and no flammable gas is generated during the whole operation. It is safer to use DC24V for power supply. Outdoor dry environment, choose AC220V power supply, convenient lead wire, good maintenance and low cost.
Some explosion-proof occasions, such as flowmeters used in gas boilers, are ideal for battery-powered electromagnetic flowmeters.
Second, the compressed air vortex flowmeter installation steps
1. The special flanges to be equipped are welded to the upstream and downstream straight pipe sections respectively, so that the inner diameters of the special flange and the straight pipe section are strictly vertical and concentric.
2. Install the sensor clip on the upper and lower straight pipe sections welded with special flanges and fasten them with bolts. The upstream and downstream straight sections should be kept concentric with the sensor.
3. It should be noted that the flow direction of the sensor should be consistent with the flow direction of the fluid in the pipeline.
Third, special attention should be paid when installing compressed air vortex flowmeter
1. When welding special flanges and straight pipe sections, the sensor should be removed and the sensor welding flange must not be carried.
2. Before the sensor is installed, the sealing ring must be placed in the groove of the flange.
3. The pressure point and temperature measurement point should be at the 3DN~5DN and 6N~8DN downstream of the sensor.
4. When the high temperature pipeline is insulated, do not wrap the sensor to avoid damage.
5. The cable connecting the vortex flowmeter should be as far away as possible from the interference of strong electromagnetic fields. It is absolutely not allowed to lay with high voltage cables. The shielded cable should be as short as possible, the maximum length should not exceed 500 meters, and should not be coiled to reduce the distributed inductance.
Intelligent GPRS MAG flow meter features
☆ Timing acquisition of electromagnetic flowmeter data: The electromagnetic flowmeter is used to send a data mode to the host every hour.
The data includes:
(1) Instrument status part: module address, module name, current module time, module battery status;
(2) Meter data part: instantaneous flow rate, instantaneous flow rate, fluid conductivity ratio, positive and negative cumulative value
☆ Support short message, fixed IP and dynamic IP address transmission. Data transmission is stable and reliable, low power consumption, and low battery alarm. SMS (SMS): Support all China Unicom and China Mobile SIM
card users; GPRS mode: support for the opening of GPRS wireless Internet access (GPRS access point must be CMNET) China Mobile SIM card users
☆ GPRS communication supports two modes of TCP and UDP, and supports two connection modes of IP address and dynamic domain name.
☆ Integration of acquisition and transmission, improving system reliability and reducing costs;
☆ Do not crash, automatically restore after dropped calls;
☆ GPRS remote online setting and short message remote setting function;
☆ Onboard industrial grade GSM/GPRS communication module, convenient for users to choose GSM/GPRS networking mode
☆ Provide user setting software, open interface
☆ Good waterproof performance