Fault-Finding - Pyramid T-1 User Manual

T1 Hall Probe System

14 Fault-finding

Symptom
Incorrect field readings
Unstable field reading
High noise levels
T1 User Guide
Possible Cause
Probe orientation not as
expected
Probe out of position
Probe is mounted inverted.
Zero offset is in effect
Calibration incorrect or
corrupted
Mechanical stress on probe
Hall device.
No probe connected.
Field is actually changing
Probe position is unstable in a
spatially varying field.
Sampling rate is too high for
T1_UG_210314
Confirmation
Check orientation of the probe
relative to the expected field
direction.
Check probe position
Check whether field has
opposite polarity to that
expected.
Check offset value shown.
Check reading of a known
field.
Check mounting arrangement.
Temperature reading is
unrealistic. No response to
magnetic fields.
Check field by independent
means.
Check field by independent
means, or by placing the probe
in a known stable field.
Noise level reduces with
Page 35 of 42
Solution
Orient and secure the probe.
Locate and secure the probe.
Mount the probe the right way
up.
Clear zero offset
Contact supplier or Pyramid
Technical Consultants, Inc. to
arrange recalibration
Mount the probe securely by
without applying bending
force.
Connect a probe
n/a
Provide a mechanically stable
probe mounting.
Use an appropriate rate for the