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Address
No. 40, Lequn Yitiao, Erdao District, Changchun City, Jilin Province
Changchun Changcheng Teaching Instrument Co., Ltd
No. 40, Lequn Yitiao, Erdao District, Changchun City, Jilin Province
1experimentcontent:
1. Familiar with the method of measuring weak magnetic fields using magneto resistive sensors and measuring the sensitivity of magneto resistive sensors;
2. Measure the horizontal and vertical components of the geomagnetic field, as well as the magnitude of the magnetic dip angle, and calculate the magnetic induction intensity of the geomagnetic field.
2、 Technical parameters:
1. Instrument dimensions: 320 * 280 * 330mm, all connecting parts are non-magnetic with a sandblasted surface;
2. Rotary measuring device (including magnetic resistance sensor): It includes a precision rotating mechanism. When the sensor measures rotation, the connecting wire does not rotate accordingly. The advantage of this mechanism is to avoid the non-conductive phenomenon caused by poor probe contact due to long-term use of previous rotating devices; φ108*40mm, Gear transmission, capable of continuous rotation from 0 to 360 °, with a reading accuracy of 6 'from 0 to 180 °, can be placed horizontally and vertically, and the sensor center remains unchanged. Magnetic Resistance Sensor: Operating Voltage: 5V, Sensitivity: 50V/T;
3. Base: 320 * 280 * 35mm, surface sandblasted black treatment, with a rotating angle of 0-350 ° and a limit device included within the measurable range, reading 0-180 °. The device includes a locking mechanism to ensure measurement accuracy requirements during measurement;
4. Helmholtz coil: A single coil has 500 turns, with an average diameter of 200mm and an outer diameter of 250mm;
5. Measurement of electrical box: DC constant current source: output current of 0200mA continuously adjustable. DC voltmeter: range 0-19.99mV, resolution 0.01mV, and another range of 2000mV.