Electromagnetic flowmeter features
Using intelligent judgment, the measurement correction setting is not used, and the air traffic control alarm and electrode detection application are more convenient;
Advanced "rough error handling" technology, which can remove fluids such as slurry to measure sharp disturbances, reduce output runout, maintain high precision measurement and make output more stable;
With a fluid density setting, it can display mass flow;
Constant current excitation current range, 125mA, 250mA optional, can be used with different manufacturers, different types of electromagnetic flow sensors;
Control function with remote reset of the totalizer, with contact signal input for starting and stopping accumulation, suitable for total inspection and batch processing applications;
With self-test and self-diagnosis function;
Advanced non-volatile memory for higher circuit reliability and effective protection of setup and measurement parameters;
The meter can be equipped with an unpowered clock and memory for recording the power down time, power-on time and power-down time;
The meter has an optional hour recording function that can store flow and electrode resistance measurements for more than 30 days.
The new keyboard processing method avoids the keyboard operation affecting the measurement, and can enter and return the operation menu to make the parameter setting more convenient;
The total display uses 10-bit decimal 9999999999 full-value carry, which solves the practice of double-word full value 4294967285 (hexadecimal FFFF) carry-in habit;
With wireless transmission, the mesh network is organized by the wireless HART protocol.
ltrasonic flowmeter installation
The time difference ultrasonic flowmeter is a competitive flow measurement method in the world today, and its measurement line accuracy is higher than 1.0%. Due to the diversity of the industrial site, especially the environment around the pipeline, how to install and debug the ultrasonic flowmeter according to the specific environment has become an important topic in the field of ultrasonic flow measurement. This procedure explains the installation details of the ultrasonic flowmeter; It further fully demonstrates the advantages of accuracy, reliability and stability of the ultrasonic flowmeter, greatly reducing future maintenance work and even maintenance-free.
Ultrasonic flowmeters should be aware of the site prior to installation, including:
1. What is the distance from the host at the installation of the sensor;
2. Pipe material, pipe wall thickness and pipe diameter;
3. Year of the pipeline;
4. Type of fluid, whether it contains impurities, bubbles, and whether it is full;
5. Fluid temperature
6. Whether there is interference source at the installation site (such as frequency conversion, strong magnetic field, etc.);
7. The temperature of the four seasons at the host site;
8. Whether the power supply voltage used is stable;
9. Whether remote signals and types are required;
According to the site conditions provided above, the manufacturer can configure the site conditions and, if necessary, special models.
Ultrasonic flowmeter common problems (2)
5, the external clip type ultrasonic flowmeter signal is low?
This depends on the technical content of the instrument itself. After a large number of test cases on the spot, it proves that the long-term pipeline, serious scaling and large diameter, the Aitulel AFTU-2W series is better than other external-clip ultrasonic flowmeters. The signal is very fast and the signal is very stable. .
Solution: For large diameter and serious scaling, it is recommended to use a good quality external clamp type ultrasonic flowmeter. The pipe at the probe installation should be cleaned, and the air between the probe and the workpiece surface should be removed with a coupling agent or coupling piece to make the ultrasonic wave. It can be effectively introduced into the pipeline to ensure sufficient sound intensity transmission on the detection surface.
6. Occasionally, there are bubbles in the measurement medium. Does the ultrasonic flowmeter with the time difference method have any influence?
Today's Aitulel AFTU-2W series external clip type ultrasonic flowmeter has dual mode. When there is air bubble, it can be automatically transferred to Doppler mode to measure. When the bubble disappears, it will automatically turn into the time difference method.
7. The meter cannot be used under strong interference on the spot?
On-site inverter or high voltage cable field strong electromagnetic interference
Recommendation: Keep away from the inverter or high voltage cable field electromagnetic interference
8. What is the minimum diameter of the externally clamped ultrasonic flowmeter on the market? What is the highest temperature?
Answer: Now only the minimum diameter of the AFTU-2W series in the world can be measured to 6mm, the temperature can be measured at 550 °C, such as the measurement of molten salt and heat transfer oil, which is not possible with other brands of flowmeters. of.
9. How to choose a suitable ultrasonic flowmeter?
Answer: Pipe material, pipe wall thickness and pipe diameter; fluid type, contain impurities, air bubbles and full pipe; fluid temperature, flow meter type, portable or fixed online.