Calibration and detection device for time ammeter

Abstract

A calibration detection device for a time ampere meter comprises a calibration detector, wherein the calibration detector comprises a display module, an MCU, a timing module, a DA module, a voltage source module, a current pump module, an output protection module, a sample resistance module, an AD module, a communication module, a storage module and a keyboard module. An LED display screen, a time tracing port, a current tracing port, a current output port, a current input port, a communication port and a keyboard are arranged on a control panel of a casing body and connected with interfaces of the calibration detector correspondingly through flat cables. The calibration detection device is capable of performing calibration detection on the time ampere meter, convenient to use and high in detection accuracy.

Description

technical field [0001] The invention belongs to a measurement calibration detection device, in particular to a calibration detection device for a time ammeter (milliampere stopwatch). Background technique [0002] The time ammeter displays the product of current (unit: mA, symbol: mA) and time (unit: second, symbol: s) (unit: milliampere-second, symbol: mAs) as a measured value. Although the existing standard current source (whether it is DC or AC) can only output a single DC current or a sine wave AC current, and the output load capacity is limited, it generally cannot adapt to the higher input resistance of the time ammeter (10Ω~100Ω ), the accuracy of the DC current is very high, but it cannot output a controllable time-current product signal, and it cannot give an accurate time index, nor can it achieve repeated measurement (the measurement has no reproducibility). The measurement current of the time ammeter is as large as 1000mA, and the measurement accuracy of milliam...

AI Technical Summary

Problems solved by technology

At present, there is no special detection equipment for the time ammeter (milliampere stopwatch) to realize the calibration and detection of the time ammeter, and of course it is impossible to trace the source of the time ammeter (milliampere stopwatch)

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