BARTINGTON INSTRUMENTS
Page 4 of 11 OM2298/3
The Mag649 offers a wider bandwidth than the standard Mag648.
High stability circuitry ensures that a minimum of ten years’ service should be expected.
3.1. Vector Measurements and Conventions
Each magnetometer produces three independent analogue output voltages in response to the
magnitude and direction of the orthogonal components of a magnetic field. A “right-hand” co-
ordinate system is adopted (see figure 1). In this system the X, Y and Z axis correspond to the
thumb, first and second finger respectively of the right hand. By convention, the magnetometer
should be installed so that the X axis is arranged to point North, the Y axis to point East and the Z
axis to point down.
Figure 1. The ‘right hand’ rule.
North
+X
Thumb
Down
+Z
2nd Finger
East
+Y
1st Finger
