[CA] [CA11] ST6001 Calibration Issues

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Jon,

As indicated within the fluxgate compass test FAQ should the measured resistances be within +/-2 ohms of the specified value then the measured values would be in spec. Also indicated within the fluxgate compass test FAQ, was an indication that binding within the fluxgate compass's moving parts could be responsible for the reported issue. In this case, it would be recommended that the S1G autopilot course computer's gyro cable be unplugged from the circuit board (see the earlier post within this thread) and that the autopilot's compass be re-calibrated and aligned. Should the problem persist, then it would be recommended that the fluxgate compass be replaced to address the reported issue. Should the problem appear to abate, then it would be recommended that the gyro be plugged back in and that the system be tested again. Should the problem persist, then the autopilot's rate gyro would be deemed to have suffered a failure and should be unplugged to permit the autopilot to function as a S1 (non-gyro assisted) rather than a S1G autopilot. This will also reduce the heading data output rate from 5Hz to 1Hz. With regard to location of the fluxgate compass, it mounting location should yield a maximum deviation value which is less than 10 degrees. Should the reported maximum deviation value exceed 10 degrees, then another location may need to be sought for the fluxgate compass. Please click here to view a FAQ addressing this subject. Should none of the above address the reported issue, then it would indeed appear that the S1G has suffered a failure. Unfortunately, Raymarine's Product Repair Center can no longer service S1/S1G/S2/S2G/S3/S3G autopilot course computers, necessitating that an operational second hand S1/S1G autopilot course computer be sought or that the autopilot (minus the drive unit) be replaced.

Radar overlay performance is dependent upon accurate stabilized high rate (5Hz or greater) heading data.

Finally with regard to the compatibility of equipment of that which you have specified with Raymarine's currently manufactured products, only the radar transducer and DSM250 (not specified) would not be compatible with Raymarine's latest generation of MFDs. Please click here to view a FAQ addressing this subject.