E+H electromagnetic flowmeter routine maintenance

E+H electromagnetic flowmeter electrode maintenance: Before using the electromagnetic flowmeter, the electromagnetic flowmeter must be calibrated with a standard pH value solution. After calibration and before operation, everyone must pay attention to cleaning the electrode of the electromagnetic flowmeter with distilled water first, and then cleaning the electrode with measuring liquid again. If an electromagnetic flowmeter is not used, when removing the electromagnetic flowmeter electrode, everyone should be careful not to let the electrode's sensor collide with hard objects, otherwise any damage will affect the use of the electrode. After using the E+H electromagnetic flowmeter, you should put on the electrode cover of the electromagnetic flowmeter and put less saturated solution in it. Just make sure that the bulb of the electrode is moist, but remember not to put it in distilled water. Soak in medium. Normally, you should pay attention to keeping the electrode clean and do not short-circuit the output on both sides of it. Otherwise, the measurement will be inaccurate and affect the use of the electromagnetic flowmeter. In fact, there are many ways to maintain the electrodes of the E+H electromagnetic flowmeter. Everyone should pay more attention during use and do not cause the electromagnetic flowmeter to fail to function normally in the future because of a little negligence.

E+H electromagnetic flowmeter failure is usually caused by incorrect installation position of the electromagnetic flow sensor. Common problems include installing the sensor at a high point in the piping system where gas is likely to accumulate; or installing it from top to bottom. On the vertical pipe, emptying may occur; or there may be no back pressure behind the sensor, and the fluid is directly discharged into the atmosphere, resulting in a non-full pipe in the measuring pipe. Usually the main interference is stray current interference in pipelines, strong electromagnetic wave interference in space, magnetic field interference from large motors, etc. Pipeline stray current interference usually requires good independent grounding protection to obtain satisfactory results. However, if a strong stray current is encountered (such as electrolytic workshop pipelines), the E+H electromagnetic flowmeter sometimes induces the AC potential peak value Vpp on the two electrodes. can be as high as 1V), additional measures need to be taken and the flow sensor and pipe insulation etc. need to be taken. Space electromagnetic wave interference is generally introduced through signal cables and is usually protected by single or multi-layer shielding.

Since E+H electromagnetic flowmeters are often used to measure dirty fluids, after running for a period of time, an adhesion layer will often accumulate on the inner wall of the sensor and cause failure. These failures are often caused by the conductivity of the adhesion layer being too large or too small. If the attachment is an insulating layer, the electrode circuit will be open and the instrument will not work properly; if the conductivity of the attachment layer is significantly higher than the conductivity of the fluid, the electrode circuit will be short-circuited. During the debugging period, the environmental conditions are good (for example, there is no interference source). , the flowmeter works normally, but it is often easy to ignore the installation conditions at this time (for example, the grounding is not very good). In this case, once the environmental conditions of the E+H electromagnetic flowmeter change and new interference sources appear during operation (such as electric welding on the pipeline near the flowmeter, large transformers installed nearby, etc.), it will interfere with the normal operation of the meter. , the output signal of the flow meter will fluctuate.