Transmission failure between the master compass and repeaters.
The is a high-performance marine navigation system designed for diverse vessel types, from small yachts to large commercial ships. It is available in three primary configurations— CMZ700B (Basic), CMZ700S (Single), and CMZ700D (Dual)—to meet varying reliability and interface needs. System Configurations
Again, these are emergency workarounds. For permanent operation, the manual is mandatory.
The Master Operation Unit features a digital display and an integrated keypad for system configuration. Key Display Elements
Master compass communication error. Inspect the wiring between the M-unit and the Control Unit. yokogawa gyro compass cmz 700 user manual
A standard Yokogawa CMZ-700 system consists of several interconnected modules. Each module plays a distinct role in data processing, power regulation, and distribution.
The installation chapter of your manual is crucial for ensuring the system's accuracy. The master compass unit (Model MKM 022) has specific mounting requirements, including permissible roll and pitch angles of up to ±40° and a maximum permissible acceleration of 0.5G.
The gyrosphere floats in a specialized liquid that degrades over time. The supporting fluid, along with the O-ring gaskets, must be replaced annually by authorized technical personnel to prevent sphere damage.
Damping fluid is too cold to float the gyro sphere properly. Key Display Elements Master compass communication error
Confirm that the master compass is clear of loose objects and that all ventilation ports are unobstructed.
Deep inside the troubleshooting section, the manual describes the . This is not a routine operation but a diagnostic ritual:
: Drives repeaters directly from the master compass without an external control box. CMZ700S (Single)
Inspect the Master Compass for signs of fluid leakage or unusual vibration. typically within 4–6 hours
Understanding these codes without the manual is impossible. The manual does not just list the code; it provides the course of action for each.
The Yokogawa CMZ-700 series is a cornerstone of modern maritime navigation. Renowned for its reliability, accuracy, and robust engineering, this gyro compass system provides critical heading data to vital shipboard equipment, including autopilots, radar, ECDIS, and AIS.
Check cooling fans; verify ambient room temperature is within limits. Temperature Low
Even experienced navigators make mistakes. A thorough reading of the reveals common failure points:
The gyro compass requires time to settle, typically within 4–6 hours, although the master compass may indicate a usable heading sooner.