Geometrics Memory-Mag G-856AX, Руководство по эксплуатации

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Geometrics, Inc
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G-856AX Operation Manual
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Figure 16. Base-station setup up using tripod kit and G-856AX staff section.
Sensor orientation
The G-856AX sensor may be mounted on the sensor staff in either of two orientations: 1)
vertically, so that the cylindrical axis of the sensor is parallel to the sensor staff or 2)
horizontally so that the sensor axis is perpendicular to the sensor staff. This is
accomplished by screwing the sensor staff into either of the threaded receptacles in the
standard sensor body. These receptacles are shown in Figure 17 a. End mounting is
shown Figure 17 b and saddle mounting in Figure 17 c. These alternative modes of
mounting the sensor allow the G-856AX to be configured for use anywhere in the world.
Horizontal and vertical mounting is also accommodated on the gradiometer sensor.
When making a measurement, the correct sensor orientation will be determined by the
Earth’s magnetic field inclination in the survey area. In regions were the magnetic
inclination is greater than +/-40° the sensor should be end-mounted if the measurement
is made with the sensor staff held vertically. That is, the sensor should be mounted so
that its cylindrical axis is vertical. Note that in this configuration the sensor has a North
arrow on its top surface. This arrow should be directed toward magnetic north when
taking a measurement. Aligning the sensor this way will place the axis of the sensor’s
internal coils perpendicular to the Earth's field and produce optimum signal.
When surveying in regions when the Earth’s field is inclined at less than +/-40° the
sensor should be mounted with its cylindrical axis horizontal as shown in Figure 18c.