Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...

AutohelmFluxgate Compass (Z105)1. DescriptionThe Z105 Fluxgate Compass Transducer contains a precision Fluxgate sensor and,once detected as faulty, should be replaced as a complete unit.2. Functional TestDisconnect the Fluxgate from the autopilot and check continuity as follows:-Cable ColourScreen to BlueRed to GreenRed to YellowRed to ScreenResistance< 10 ohms< 5 ohms< 5 ohmsOpen Circuit3. Magnetic DeviationThe Z105 Fluxgate Compass requires careful siting if optimum autopilot performanceis to be achieved. The SeaTalk Course Computers are able to correct the compassfor any deviating magnetic fields present when the linearisation procedure is carriedout. Any further deviation, introduced after linearisation, will introduce an error betweenthe Fluxgate and the ships compass. This can be removed by carrying out thelinearisation procedure again. If the displayed deviation is greater than +/-15 degreesthe Fluxgate should be re-sited. Note:The linearisation procedure should always be carried out if the fluxgate has beenexchanged, removed or moved from its original mounting position.SeaTalk Service Manual 3