User manual for the RS‑NJD‑N01‑1 atmospheric visibility meter, covering installation, configuration, communication and troubleshooting.
The RS‑NJD‑N01‑1 atmospheric visibility meter uses a 35° forward‑scattering principle to measure visibility distance with high accuracy. It features a protected optical head, low power consumption, RS‑485 output and robust over‑voltage and electromagnetic protection, making it suitable for road, airport and port meteorological systems.
This manual provides product overview, selection guidance, step‑by‑step installation, software configuration, Modbus‑RTU communication details, common troubleshooting tips and contact information for Shandong Renke Measurement Control Technology Co., Ltd. This manual is written in Chinese.
| Power supply | 10~30 V |
|---|---|
| Measurement range | 5‑10000 m (default, optional 5‑50000 m or 5‑80000 m) |
| Measurement error | ≤1 km ±2 % (≤1 km ±10 % for >1 km) |
| Update interval | 20 s |
| MTBF | >18000 h |
| Operating temperature | -40 °C ~ 60 °C |
| Relative humidity | ≤95 % (30 °C) |
| Weight | <10 kg |
| Output interface | RS‑485 |
Use the provided configuration software (485 parameter configuration tool) to modify the address and baud rate; connect only one device at a time, then set the desired values in the software.
The factory default address is 0x01 (decimal 1).