BMM150 coordinate origin

[misterMark]

Where in the 1.56 x 1.56 x 0.6 mm body of the BMM150 magnetometer is considered the Origin ?    

I couldn't find any information in the datasheet about where the sensor is taking its measurements.

The geometric centre seems like a good bet, to minimize errors. but I would like to be as precise as possible here.

I'm using an array of BMM150s for my application, and I need to know their measurement point-coordinates for a model.

[BSTRobin · Accepted solution]

Hello misterMark,

Thanks for your feedback.

1.You need do full calibration for each sensor, compensate both hard iron and soft iron effect, this already including sensor zero B offset;
2.For Z axis, center of the sensor;
3.Question for magnetic field distribution of magnet , not liner, right?
4.If use sqrt(x^2+y62+z^2), because bmm150 is very small, normally we can look the measurement position is center of BMM150. What's the accuracy from your side?

[BSTRobin]

Hello misterMark,

Do you have further feedback?

[BSTRobin]

Since there was no feedback for a long time, we close this topic first. You could update feedback in the future if you have.