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一、霍尔效应特斯拉计常见检定方法1.直接测量法采用亥姆霍兹线圈产生标准磁场,磁感应强度标准值B0可由电源输出电流值与线圈常数计算得到:B_0=4π/(10~7)KI_0(1)式中:B_0——磁感应强度标准值,T;K——线圈常数,m~(-1);I_0——标准电流表读数,A。被检特斯拉计的基本误差可按式(2)计算:δ=(B-B_0)/B_0×100%(2)式中:δ——被检特斯拉计的基本误差,%;B——被检特斯拉计的示值,T。采用亥姆霍兹线圈进行直接测量的优点在于:
First, the Hall effect Tesla meter common test method 1 direct measurement method using Helmholtz coil to produce a standard magnetic field, magnetic flux density standard value B0 can be calculated by the power supply output current value and the coil constant: B_0 = 4π / (10 ~ 7) KI_0 (1) Where: B_0-- standard value of magnetic induction, T; K - coil constant, m ~ (-1); I_0-- standard ammeter reading, The basic error of the tesla meter to be seized can be calculated according to formula (2): δ = (B-B_0) / B_0 × 100% (2) Where: δ-- basic error of the tesla meter under test, B - test Tesla meter indication, T. The advantages of using a Helmholtz coil for direct measurement are: