Abstract

˜500 mF in values of 1, 2, 5 times of single-unit capacitance. The present box significantly extends the measurement range of capacitance, and makes the capacitor standard box smaller and lighter. By introducing a compensation function for open and short circuits, it is convenient and suitable for precision measurement.

IPC Classes  ?

• G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
• H01G 5/38 - Multiple capacitors, e.g. ganged
• H01G 4/38 - Multiple capacitors, i.e. structural combinations of fixed capacitors
• H01G 2/10 - HousingEncapsulation
• G01R 35/02 - Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating

Abstract

The invention disclosed a high precision decade capacitor standard box. It comprises 6 sets of physical capacitors, 6 changeover switches, and output ports. Each set of physical capacitors include 4 physical capacitors, at least one capacitor has single-unit capacitance. The changeover switch implements the decade encoding of all the combinations of 4 physical capacitors. The changeover switch has input terminals that connect to two electrodes of physical capacitors, and output terminals that connect to the output ports of capacitor standard box to provide the selected capacitance. The capacitance values can be selected any integer from 0 to 10 times of single-unit capacitance. The decade encoding of all the combinations of 4 capacitors can reduce the number of required capacitors and wires for connecting capacitors. The open and short compensation are adopted in this decade capacitor standard, which minimizes error, improve accuracy, and is convenient for measurement, transport, and field application.

IPC Classes  ?

• G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
• H01G 4/38 - Multiple capacitors, i.e. structural combinations of fixed capacitors
• H01G 2/10 - HousingEncapsulation
• G01R 35/02 - Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
• H01G 5/38 - Multiple capacitors, e.g. ganged

Abstract

A standard inductance box, relating to the fields of measurement or calibration, and relating in particular to a standard gauge for transferring an inductance parameter. The standard inductance box uses unary, binary and quinary, and comprises a physical inductance box section and a simulated inductance box section, said sections being respectively arranged in a metal box. Electrodes of the physical inductance box section and the simulated inductance box section are led out. The inductance range of the standard inductance box is 1 μH-500 H. The described means achieve an inductance range of 1 μH-500 H, expanding the inductance range in the prior art, and the application of a simulated inductance box. Using unary, binary and quinary standards reduces the size and weight of the physical inductance box section, facilitating transportation and use in the field.

IPC Classes  ?

• H01F 21/12 - Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped
• H01F 21/02 - Variable inductances or transformers of the signal type continuously variable, e.g. variometers
• H01F 27/29 - TerminalsTapping arrangements
• H01F 27/02 - Casings
• G01R 1/28 - Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
• G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass
• H01F 27/24 - Magnetic cores
• H01F 27/28 - CoilsWindingsConductive connections

Abstract

A standard inductance box, relating to the fields of measurement or calibration, and relating in particular to a standard gauge for transferring an inductance parameter. The standard inductance box uses unary, binary and quinary, and comprises a physical inductance box section and a simulated inductance box section, said sections being respectively arranged in a metal box. Electrodes of the physical inductance box section and the simulated inductance box section are led out. The inductance range of the standard inductance box is 1 µH - 500 H. The described means achieve an inductance range of 1 µH - 500 H, expanding the inductance range in the prior art, and the application of a simulated inductance box. Using unary, binary and quinary standards reduces the size and weight of the physical inductance box section, facilitating transportation and use in the field.

IPC Classes  ?

• G01R 1/28 - Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
• H01F 21/00 - Variable inductances or transformers of the signal type