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T1 Hall Probe System
9 Making measurements
9.1 Mounting the probe
The HP-1 probe should be mounted so that the sensitive spot is located in the field you want to
measure. Two clear holes for M4 screws are provided on the probe mounting flange to allow a
stable position. The probe will measure the field component normal to the flat of the target spot
2
graphic. The Hall element is under the red cross hair. It has a sensitive area of about 1.5 mm
.
The field reading will be a positive value for a magnetic field vector entering the top surface of
the probe, as shown below.
N
S
The probe mounting should prevent any tendency for movement or vibration, especially if the
probe is measuring a fringe field where there is field curvature. If the field has significant AC
components, the mounting should be non-conducting to avoid measurement errors due to eddy
currents. The HP-1 probe itself is designed to make AC measurements: there are no metal
components to support eddy currents and the low-level signals are carried in tightly twisted
conductors.
T1 User Guide
T1_UG_210314
Page 18 of 42
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