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Summary of Contents for CMA Dishmachines MAGNETIC FIELD SENSOR BT52i
- Page 1 BT52i AGNETIC IELD ENSOR ’ UIDE CENTRE FOR MICROCOMPUTER APPLICATIONS http://www.cma-science.nl...
- Page 2 Short description The Magnetic field sensor BT52i measures magnetic field strength. It has two measurement ranges, -100 .. 500 mT and -10 .. 50 mT, which can be selected using a push button located on the top of the sensor box. When the push button is pressed down, the range -10 .. 50 mT is selected, when the push button is in the upper position, the -100 .. 500 mT range is selected. The Magnetic field sensor uses a Hall-element as its sensing element. This element is mounted at the tip of the stainless steel tube, at the position 0 cm indicated on the metal tube. The face of Hall element is directed perpendicular to the direction of the stainless steel tube and the sensor is most sensitive when the metal tube is positioned parallel to magnetic field lines. The sensor is therefore very suitable for measuring the magnetic field inside coils, or near (very strong) permanent magnets. The sensor is less suited to measure the magnetic field in slit-shaped cavities. Because the output signal of a Hall-element is very small, the Hall- element is contained in an integrated circuit with a differential amplifier with temperature...
- Page 3 or the calibration stored in the Coach Sensor Library. The Coach program allows shifting the pre-defined calibration or creating a new calibration if needed. Use the Set to zero option in Coach to adjust the zero point of the sensor. Suggested experiments The Magnetic Field sensor can be used in various experiments such as: Measurements of the magnetic field near a (strong) permanent magnet. • Measurements of the magnetic field near a current-carrying wire. • Measurements of the magnetic field near or inside a coil or solenoid. • The variation of the field when alternating current flows through a coil. • Figure. Measuring the magnetic field near a permanent magnet Magnetic field strength measurement Magnetic field strength (also known as the magnetic flux density) is a measure of the force the magnetic field will exert on an electric current or another magnet. In S.I. units magnetic field strength is expressed in teslas (T). In cgs units magnetic field strength is expressed in gauss (G). 1 G = 1 x 10 T = 0.1 mT and 1 mT = 10 G Below are given magnetic field strength values of exemplary magnetic sources. Magnetic field strength Magnetic field source in mT -10 – 10 The human brain magnetic field...
- Page 4 Technical Specifications Sensor kind Analog, generates an output voltage between 0 .. 5 V Measurement ranges -10 .. 50 mT -100 .. 500 mT Resolution using -10 .. 50 mT range: 0.024 mT 12 bit AD converter -100 .. 500 mT range: 0.24 mT Calibration function -10 .. 50 mT range: B (mT) = 50 * V (V) - 10 -100 .. 500 mT range: B (mT) = 500 * V (V) - 100 Accuracy ± 5 % Voltage offset 0.5 V ± 3% Current requirement Max. 60 mA Operating temperature 0 .. 50 °C Connection IEEE1394 connector for BT-IEEE1394 sensor cable. Sensor cable is not delivered with the sensor and has to be purchased separately (CMA art. code BTsc_1 or BTsc_4 ). Warranty: The Magnetic Field sensor BT52i is warranted to be free from defects in materials and workmanship for a period of 12 months from the date of purchase provided that it has been used under normal laboratory conditions. This warranty does not apply if the sensor has been damaged by accident or misuse.
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