sitrans LR 400 operator manual, introduces instrument structure, system application, programming, specifications, dimensions, installation, startup, operation, parameters, fault repair, maintenance and other contents.
This instruction manual covers the SITRANS LR 400 radar level meter designed for solid material level measurement. It includes safety instructions, required qualifications for installation and operation, and detailed guidance on wiring, programming, and fault handling.
Key sections describe the device’s structure, HART and PROFIBUS PA communication options, performance specifications such as a 0.35‑50 m measurement range and 25 GHz frequency, and maintenance procedures like antenna cleaning and component replacement.
| Power supply | 120‑230 V AC, 15 % ±, 50/60 Hz, 6 W or 24 V DC, +25/‑20 %, 6 W |
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| Measurement range | 0.35 m to 50 m (1.15 ft to 164 ft) |
| Measurement error | ≤5 mm (0.2") for 0‑10 m, ≤15 mm (0.6") for 10‑50 m |
| Operating frequency | ≈25 GHz |
| Ambient temperature range | ‑20 °C to 40 °C (‑5 °F to 104 °F) |
| Certifications | ATEX II 1 G, EEx ia IIC T4 |
The device can be powered from 120‑230 V AC (15 % tolerance) or from a 24 V DC source with +25/‑20 % tolerance.
It supports HART communication and PROFIBUS PA, and can be used with SIMATIC PDM software.
The antenna end must pass through the container’s pipe and extend into the interior of the vessel.