Join Date: May 2006
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Raymarines fluxgate compass has a gimbled weight that rattles when shaken, this is normal. To test if the fluxgate is OK there is a simple resistance test.
Between the following cables measure the resistance, they should be
Red to Green: 4-10 ohms
Red to Yellow: 4-10 ohms
Green to Yellow: 8-10 ohms
Screen to Blue: 8-10 ohms
all other combinations are OC
When doing the circles to calibrate the compass, you need to turn cirles that take about 2 minutes to complete, choose a day that with very little wave action or wind and make the circles as near perfect as possible, you need a minimum of two circles but it can take more - Be patient
The location of the compass is very important, make sure it is not located near electrical cables or where tinned foods, drinks or cooking pots are located, this will change the magnewtic signature of the boat and make it difficult to calibrate.