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Electromagnetic flowmeters can generally operate normally for a long time without maintenance after installation, and then require maintenance and daily inspections. Not receiving a signal or the signal being too weak are minor problems. So don’t be surprised if it happens. You can solve it by carefully following the following steps. 1. First confirm whether the pipe is filled with fluid. 2. If the pipe is too close to the wall, the probe can be installed on the pipe diameter with an inclined angle instead of on the horizontal pipe diameter. The Z method should be used to install the probe. 3. Carefully select the dense part of the pipe and polish it brightly. Apply sufficient lotus root mixture to install the probe. ； 4. Carefully and slowly move each probe near the installation point to find the maximum signal point to prevent the installation point that can receive a stronger signal from being missed due to scaling on the inner wall of the pipe or local deformation of the pipe causing the ultrasonic beam to reflect out of the expected area. ； 5. For metal pipes with serious scaling on the inner wall of the electromagnetic flowmeter, you can use hitting methods to make the scaled parts fall off or crack. However, it should be noted that this method sometimes does not contribute to the transmission of ultrasonic waves because of the gap between the scale and the inner wall. DN100 electromagnetic flowmeter product features: 1. Programmable frequency low-frequency rectangular wave excitation improves the stability of flow measurement and has low power loss. ； 2. Using 16-bit embedded microprocessor, fast operation speed and high precision ； 3. Full digital processing, reliable measurement, high precision, flow measurement range up to 150:1 ； 4. Ultra-low EMI switching power supply, suitable for a wide range of power supply voltage changes, and good anti-EMC performance ； 5. Full Chinese character menu operation, easy to use, simple to operate, easy to learn and understand ； 6. High-definition backlit LCD display ； 7. It has bidirectional flow measurement and bidirectional total accumulation functions, and has bidirectional output functions for current and frequency. ； 8. There are three internal totalizers that can respectively display the forward accumulation amount, reverse accumulation amount and difference accumulation amount. ； 9. With RS485 or RS232 digital communication signal output. 10. With conductivity measurement function, it can determine whether the sensor is empty. ； 11. The constant current excitation current has a wide range and can be used with electromagnetic flowmeter sensors from different companies and types. ； 12. With self-check and self-diagnosis functions ； 13. Using SMD devices and surface mounting (SMT) technology, the circuit has high reliability ； 14. The instrument is designed with a non-power-down clock that can record 16 power-down times. For more information, please visit the company’s official website http://www.yb1518.com/. Please keep this link when reprinting!