What are the cable routing and shielding requirements for electromagnetic flowmeters and RTU devices?

Electromagnetic flowmeter cable shielding is critical for ensuring measurement accuracy and system stability. LGF series electromagnetic flowmeters and EC32/EC60 RTU devices have stringent electromagnetic compatibility requirements that demand professional shielding measures.

• Signal cables must use double-shielded cables with outer braided shield + inner foil shield, shielding effectiveness ≥85%
• Separate power and signal cable routing with ≥30cm spacing, perpendicular crossings only
• Single-point grounding of shield layers, ground resistance ≤4Ω, avoid ground loops
• 4G communication antenna cables use 50Ω coaxial cable, maximum length 10 meters
• Install isolation transformers when cables cross different potential zones
• Use metallic conduits or cable trays in high EMI environments

For solar-powered systems, DC cables also require shielding to prevent interference with ultra-low power RTU devices. Proper installation ensures optimal performance of FMCW radar and ultrasonic measurement technologies.