This manual provides installation, connection, commissioning, maintenance, and troubleshooting instructions for the Siemens SITRANS LG250 radar level sensor.
The document serves as a comprehensive guide for professionals operating the SITRANS LG250, a guided wave radar sensor designed for continuous level or interface measurement in liquids. It covers safety regulations, product structure, and operational principles based on microwave pulse reflection along a coaxial probe.
Detailed instructions are provided for installation, electrical connection (including 4-wire systems), and commissioning using various modules like the LG Local Display Interface and PACTware software. The manual also includes sections on diagnostics, maintenance procedures, fault exclusion, and replacement of electronic components. This manual is written in Chinese.
The standard component works with 90...253 V AC, while the component with power supply works with 9.6...48 V DC or 20...42 V AC.
The upper medium must have a dielectric constant of at least 1.6, and its thickness must be at least 50 mm.