With the arrival of summer, thunderstorm weather occurs frequently, which is likely to cause faults such as lightning damage, signal interference, and water ingress short circuit to various industrial measuring instruments including intelligent vortex flow meters, electromagnetic flow meters, and ultrasonic flow meters. These faults directly affect the stable operation of the instruments and disrupt the normal production management order of enterprises. Therefore, taking scientific and effective lightning protection and maintenance measures in advance to reduce the fault rate is the key to ensuring the accurate measurement of instruments and the smooth operation of enterprise production.
Core Lightning Protection Measures for Intelligent Vortex Flow Meters and Measuring Instruments
In response to the lightning protection needs of summer thunderstorm weather, combined with the working characteristics of intelligent vortex flow meters, electromagnetic flow meters and other instruments, the mainstream internal and external lightning protection measures in the industry currently include electromagnetic shielding, equipotential grounding, and rational selection of surge protectors (SPD), which can be flexibly combined and applied according to on-site working conditions.
1. Electromagnetic Shielding: Basic Measure for Lightning Protection and Anti-Interference
Electromagnetic shielding is a core method to reduce the penetration of alternating electromagnetic fields into measuring instruments such as intelligent vortex flow meters. At the same time, it can effectively reduce the induced electromotive force on the external connecting lines of the instruments, fundamentally reduce the impact of lightning electromagnetic interference on the core components of the instruments (such as sensors and transmitters), and build a solid basic defense for the stable operation of the instruments.
2. Equipotential Grounding: Avoiding Lightning Risk Caused by Potential Difference
Equipotential grounding is a key link in the lightning protection of measuring instruments. Specifically, the grounding terminals of intelligent vortex flow meter transmitters, sensors, secondary meters and other equipment installed on equipment and pipelines need to be reliably connected to the enterprise"s public grounding grid to achieve full-system equipotential. This avoids potential differences between equipment during thunderstorm weather and prevents lightning current from damaging the instruments through potential differences.
3. Surge Protector (SPD): Resisting Line Overvoltage and Overcurrent
A surge protector (SPD) is a device that resists line overvoltage and overcurrent caused by lightning conduction.
