| 摘要 |
The present invention refers to a device for calibrating carbon electric resistors. The device comprises a metallic support for fastening at least four resistors introduced into the cylindrical cavities of small metallic prisms, which are simultaneously brought into contact between two metal heaters, these latter elements supplying a variable thermal charge for measuring the electric resistance of each one of the resistors at different temperatures, which are subjected to a cryogenic environment. The device also comprises a closed electric circuit based on four wires per each resistor and a connection keyboard, where a commercial measurement instrument, such as a digital multimeter of four terminals, is connected for performing the measurements in the exterior at room temperature. |
