Testing equipment/Hysteresis measurement

Automatic measurement on basic magnetization curve and magnetic hysteresis loop under static state of soft magnetic material, accurate measurement on static magnetic characteristic parameters such as initial permeability μi, maximum permeability μm, saturation magnetic induction Bs, remanence Br, coercive Hc and hysteresis losses Pu.Windows measurement software applied simply. It conforms to China National Standards GB 3656-83, GB 3657-83, GB/T 13012-91, GJB 937-90, industry standard SJ/T 10281-91 and international standard IEC 60404-4, IEC 404-7.In accordance with measuring principle of ballistic method, combine computer control technology, A/D and D/A, replace conventional ballistic galvanometer with electronic integrator, realize analog ballistic method measurement under microcomputer control, can completely eliminate non-instant error caused by ballistic galvanometer in classical ballistic method, with high measurement accuracy, fast speed and good repeatability, can eliminate the influence of various artificial factors, and supply reliable basis for research on material magnetization process. General Features Testing sample varieties: soft magnetic ferrite, permalloy, amorphous, nano crystal, iron dust core, electrician ferrite and stalloy. ·Testing sample shapes: annular, E and U closing samples, and strip (bar) and chip open samples. ·Closing sample direct winding measurement: sample, magnetizing coil (N1) and measuring coil (N2) form a no-load transformer. ·Measure magnetic field intensity through measuring magnetizing current, magnetic field lock precision as high as 0.1%. ·Adopt electronic integrator to measure magnetic induction, zero drift of integrator can be self-corrected through software. ·Solenoid or permeameter shall be equipped to measure open samples, the inner field can be measured by the magnetic potentiometer inside. ·Testing method:analog ballistic method and magnetic field sweep. ·Adopt analog ballistic method to measure basic magnetization curve, can accurately measure magnetic characteristic parameters on magnetization curve: μi, μm, Bs, value μ of any point. ·Adopt analog ballistic method and magnetic field sweep to measure saturation hysteresis loop, can accurately measure magnetic characteristic parameters on hysteresis loop: Bs, Br, Hc and Pu. Special explanation: analog ballistic method to measure hysteresis loop is an exclusive measuring method of our company, can greatly improve the accuracy of Hc and Br. ·Automatic demagnetization function before μi testing, 10 Hz AC saturation demagnetization adopted. ·Select to test single parameter with analog ballistic method to save time, the time of every testing point can be set from 0.1 second to 0.9 second. ·Adopt the B speed feedback, it can automatic regulate the density with the shape of sample magnetic characteristic curve, and curve can also be tested according to the testing point predefined by users. ·Powerful software functions with minimal technical requirements for testing staff. System Specifications Adopt ballistic method measurement, technical indices as follows: Parameters measuredBs (%)Br (%)Hc (%)Pu (%)μ m (%)μ i (%)Uncertainty (k = 2)111.5125Repeatability (constant temperature)± 0.5± 0.5± 0.5± 0.5± 1± 3 When testing hysteresis loop with scanning method, H and B measuring errors can be estimated as: B: 1% + 1/2 LSB H: 1% + 1/2 LSB Instrument Specifications MATS - 2010SD Static HysteresisgraphPC6616 A/D D/A CardOutput Voltage: 0 ±35 V Output Current: 0.01 mA 10 A Current Range: 1 mA, 2 mA, 5 mA, 10 mA, 20 mA, 50 mA, 100 mA, 200 mA, 500 mA,1 A, 2 A, 5 A, 10 A total 13 automatic ranges Stability: superior to 0.05% Flux Range: 0.25, 0.5, 1, 2, 5, 10, 20 mWb, total seven automatic ranges Sensitivity: 0.05 μWb (ballistic method) 0.1 μWb (magnetic field sweep) A / D Conversion: 16 bits,16 channels Conversion Time: < 10 μs Conversion Accuracy: 0.02% (full range) D/A Conversion: 12 bits, 2 channels Conversion Accuracy: 0.1% (full range) Bus Structure: PCI busbar Soft interface Test result