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T1 Hall Probe System
across the terminals that is the negative of the rate of change of B integrated over the surface area
of the loop.
d
V
B
.
ds
dt
S
We can assume that the loop area is small enough that B is constant over its area, so we have
dB
V
A
dt
where is the area of the loop.
The resulting induced current magnitude and time profile will depend on the impedance of the
loop. This effect is important when you are measuring AC fields. The HP-1 is carefully
designed to prevent circulating induced currents that might affect its readings. You should take
care that the position of the probe is not near conductive plates or loops that could affect the field
reading unless you are deliberately trying to survey induced currents.
T1 User Guide
T1_UG_210314
Page 34 of 42
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