Lake Shore 475, Руководство пользователя

Страница: 31 / 148

Lake Shore Model 475 Gaussmeter User’s Manual
Installation 3-5
Figure 3-3. Maximum Flexible Probe Bend Radius
3.5.2 Probe Operation
In the DC mode of operation, the orientation of the probe affects the polarity reading of the gaussmeter. On a transverse
probe, the Lake Shore name printed on the handle indicates the side for positive (+) flux entry. On an axial probe,
positive (+) flux entry is always from the front of the probe. See Figure 3-4.
NOTE: For best results, the instrument and probe should warm up for at least 5 minutes before zeroing the probe,
and at least 30 minutes for rated accuracy. The probe and the zero gauss chamber should be at the same
temperature.
If the exact direction of the magnetic field is unknown, the proper magnitude is determined by turning on Max Hold and
slowly adjusting the probe. As the probe turns and the measured field rises and falls, its maximum value is held on the
display. Make note of the probe orientation at the maximum reading to identify the field orientation.
Figure 3-4. Probe Orientation for Positive Measurement