Appendix 3. Static field measurements: WPH-DC
Warning:
• Under high field conditions (above 30 mT), it is not recommended to connect
the SMP3 directly to the WPH-DC probe as the SMP3 contains
ferromagnetic elements. In these cases, you must use the 5-meter extension
cable to keep the SMP3 as far away as possible.
Important note: if it is suspected that the measuring point may perhaps have an
elevated field, it is recommended to carry out a preliminary assessment around that
point, approaching progressively. If it is found that the field is close to 30 mT, where
the
SMP3
will be placed to take the final measurement, precautions should be taken to
prevent the
SMP3
from moving, or using the extension cable as mentioned previously.
• The WPH-DC probe integrates hall sensor technology that allows very high
fields to be measured (up to 10 T) but these sensors have a residual voltage
(without the presence of a magnetic field) that must be compensated to
perform an accurate measurement. For this, you would have to use the
“Zero Gauss” camera delivered with the equipment and make the zeroing of
the probe. (More detail below).
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