Frage: Laut Datenblatt gibt es in dem Sensor noch eine Spule, die man kurz aktivieren kann, wie sieht denn das bei deiner Messung aus? (Programmierung?)
However, the influence of a strong magnetic field
(more than 5.5 gausses) along the magnetization axis
could upset, or flip, the polarity of the film, thus
changing the sensor characteristics. A strong
restoring magnetic field must be applied magnetically
to restore, or set, the sensor characteristics. The
HDMM01 magnetic sensor has an on-chip
magnetically coupled coil: a SET/RESET coil pulsed
with a high current, to provide the restoring magnetic
field.
Grüße, Bernhard