| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic measuring device for easily removing the non-load unbalanced voltage of a magnetic sensor at the time of measuring a fine magnetic field. SOLUTION: A magnetic field is detected by a magnetic sensor 2, and the output of this magnetic sensor 2 is amplified by an amplifier circuit 3, and the magnetic field is displayed on a display circuit 4, and the unbalanced voltage of the magnetic sensor 2 is detected by a correcting circuit 5, and feedbacked to the amplifier circuit 3 so that the unbalanced voltage can be offset in this magnetic measuring device 10. This magnetic measuring device 10 is provided with a data setting means 11 for setting data equivalent to a non-load unbalanced voltage outputted from the magnetic sensor 2 at the time of shielding an earth magnetism and a data adding means 12 for adding the set data to the output of the correcting circuit 5, and feedbacking it to the amplifier circuit 3.
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