| 摘要 |
<p>PURPOSE:To provide a current measuring device, a measurement standard and an error measuring apparatus wherein their sensitivity is not changed due to the arrangement of a bus in a circuit which measures the current measuring error of the current measuring device. CONSTITUTION:This measuring apparatus is provided with a coaxial bus la which surrounds a coil for a current measuring device, with a cylindrical and large-diameter return bus 1b and with a small-diameter return bus 1c. Thereby, it is reduced that the coaxial bus and the return buses are influenced by a magnetic field generated by a current from an other buses and by a magnetic field at the bend part of the own buses, and it is possible to reduce a noise due to electromagnetic waves.</p> |
