Electromagnetic flowmeter EMF89J1- (125) 43030C11-F1B1H2

Electromagnetic flowmeter EMF89J1- (125) 43030C11-F1B1H2The measurement principle is Faraday's law of electromagnetic induction, and the main components of the sensor are: measuring tube, electrode, excitation coil, iron core, and magnetic yoke housing.
Electromagnetic flowmeter EMF89J1- (125) 43030C11-F1B1H2Product Features:
1. Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;
2. Measure the flow components inside the tube, with no pressure loss and low requirements for straight pipe sections;
3. Series nominal diameter DN15~DN3000. There are multiple options for sensor lining and electrode materials;
4. The converter adopts a novel excitation method, with low power consumption, stable zero point, and high accuracy. The flow range can reach 1500:1;
5. The converter can be integrated or separated from the sensor;
6. The converter adopts a 16 bit high-performance microprocessor, 2x16 LCD display, convenient parameter setting, and reliable programming;
7. The electromagnetic flowmeter is a bidirectional measurement system equipped with three integrators: forward total, reverse total, and differential total; Can display. Zhuang, reverse flow, and have multiple outputs: current, pulse, digital communication HART；
8. The converter adopts surface mount technology (SMT) and has self checking and self diagnostic functions;
Main technical data:

Technical data of the whole machine and sensors

Converter technology data

Selection of lining

Selection of imported protective flanges and grounding flanges (or grounding rings)

Selection of electrodes

Reference flow range

routine maintenance
Just need to conduct periodic visual inspections of the instrument, check the surrounding environment of the instrument, remove dust and dirt, ensure that there is no water or other substances, check if the wiring is good, and check if there are any newly installed strong electromagnetic field devices or wires crossing the instrument near the instrument. If the measuring medium is prone to contaminating the electrode or settling or scaling inside the measuring tube wall, regular cleaning and cleaning should be carried out.
Fault finding
If the flowmeter is found to be malfunctioning after being put into operation or after a period of normal operation, the external condition of the flowmeter should be checked first, such as whether the power supply is good, whether the pipeline is leaking or in a non full state, whether there are bubbles in the pipeline, whether the signal cable is damaged, and whether the output signal of the converter (i.e. the input circuit of the rear instrument) is open circuit. Remember to blindly disassemble and repair the flowmeter.
Sensor inspection
Testing equipment: one 500M Ω insulation resistance tester and one multimeter.
Test steps:
(1) When the pipeline is filled with medium, use a multimeter to measure the resistance between terminals A, B, and C. The resistance between A-C and B-C should be equal. If the difference is more than 1 times, it may be due to electrode leakage, condensation on the outer wall of the measuring tube or inside the junction box.
(2) Measure the insulation resistance between A-C and B-C with an M Ω meter when the lining is dry (it should be greater than 200M Ω). Use a multimeter to measure the resistance between terminals A and B and the two electrodes inside the measuring tube (which should be in a short-circuit connected state). If the insulation resistance is very low, it indicates electrode leakage and the entire flowmeter should be returned to the factory for repair. If the insulation has decreased but still exceeds 50M Ω and the inspection result in step (1) is normal, it may be due to moisture on the outer wall of the measuring tube, and a hot air blower can be used to dry the inside of the shell.
(3) Measure the resistance between X and Y with a multimeter. If it exceeds 200 Ω, the excitation coil and its lead may have an open circuit or poor contact. Remove the terminal board for inspection.
(4) Check the insulation resistance between X, Y, and C, which should be above 200M Ω. If there is a decrease, dry the inside of the shell with hot air. During actual operation, the decrease in coil insulation will lead to increased measurement errors and unstable instrument output signals.
(5) If it is determined that the sensor has a fault, please contact the electromagnetic flowmeter manufacturer. Generally, it cannot be solved on site and requires repair at the manufacturer.
Converter inspection
If it is determined to be a converter fault and there is no problem with the external cause after inspection, please contact the electromagnetic flowmeter manufacturer. The manufacturer usually solves the problem by replacing the circuit board.
Maintenance of electrodes
Before using an electromagnetic flowmeter, it is necessary to calibrate it with a standard pH solution. After calibration, before operation, everyone must pay attention to cleaning the electrodes of the electromagnetic flowmeter with distilled water first, and then cleaning the electrodes again with measuring solution.
If the electromagnetic flowmeter is not used, when removing the electrode of the electromagnetic flowmeter, everyone should be careful not to let the tactile sensor of the electrode collide with a hard object, otherwise any damage will affect the use of the electrode.
After using the electromagnetic flowmeter, everyone should put the electrode of the electromagnetic flowmeter on the sleeve and put less saturated solution inside. As long as the electrode bubbles are kept moist, remember not to soak them in distilled water.
4. It is important to keep the electrodes clean and avoid short circuits on both sides of the output, as this may result in inaccurate measurements and affect the use of the electromagnetic flowmeter.
In fact, there are many methods to maintain the electrodes of an electromagnetic flowmeter. Everyone should pay more attention during use and not let their small negligence cause the electromagnetic flowmeter to malfunction in the future.