General Welding Consumables · Welding Consumables
The technical working principle of the SM-70G / M21 radar involves electromagnetic waves emitted by a magnetron to detect and measure distances. These signals bounce back from objects and are then processed to provide navigational information. Developed by Hyundai Welding Co., Ltd. (Pohang), this device is certified for X-Band and S-Band frequencies, adhering to the IMO SOLAS standards. Common issues include a magnetron failure after 5,000-8,000 operational hours, antenna bearing motor wear after around 30,000 hours, display backlight failures, heading marker drift, and water ingress in the waveguide due to pressure issues. For optimal maintenance, replace the magnetron every 5,000-8,000 hours, lubricate the antenna bearing annually, perform weekly performance checks as per IMO requirements, and conduct an annual inspection.
What our service work and the manufacturer documentation say about keeping this model running.
Magnetron replacement every 5,000-8,000 hours. Antenna bearing lubrication annually. Weekly performance monitor test (IMO requirement). Annual inspection.
Hyundai Welding Co., Ltd. (Pohang): Keep a spare magnetron on board (on magnetron models). Lead time: 1-3 weeks.
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