Metering calibration method of lightning protection element tester

Abstract

The invention discloses a metering calibration method of a lightning protection element tester. The method comprises the following steps: S1, a lightning protection element tester tests a piezoresistor and other components, wherein the output DC voltage range is 0-2000 V in operation, and the DC current range is 0-1000 [mu]A; S2, a voltage terminal distinguishes high-end output from low-end output; S3, a direct-current high-resistance voltage divider or a digital high-voltage meter is connected to the high end and the low end in parallel, and voltage parameters are measured; and S4, the current value of the lightning protection original tester is measured by using a high-voltage high-resistance box and a digital multimeter. According to the invention, aiming at the characteristic that calibrated equipment is a voltage source, a high-resistance voltage divider or a digital high-voltage meter is used for measuring voltage, so that the influence of the internal resistance of a measuring instrument on a voltage measurement value is avoided; and a high-voltage high-resistance resistor is used for adjusting the current of a measurement loop, so that the state of the lightning protectionelement tester in the actual use process can be simulated, and the whole measurement loop can be protected from generating overcurrent.

Description

technical field [0001] The invention relates to the technical field of electromagnetic measurement and calibration, in particular to a measurement and calibration method for a lightning protection component tester. Background technique [0002] When the lightning protection components work normally, the resistance value is infinite, which is equivalent to the disconnected state of the switch element. When the lightning surge or overvoltage comes, the lightning protection components are turned on, which is equivalent to the switch being closed, and the overcurrent is discharged to the ground. , so as to protect the electrical equipment from being damaged. The existing lightning protection component tester needs to be used in the production of lightning protection components, and the output DC voltage of the existing lightning protection component tester is generally around 2000V, and the digital multimeter cannot be used directly Measurement, and the impedance in the voltage ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a measurement and calibration method for a lightning protection component tester, which has the advantage of measuring a high-voltage voltage source, and solves the problem that the output DC voltage of the existing lightning protection component tester is generally about 2000V, and the digital multimeter cannot be directly used measurement, and the impedance in the voltage range of the digital multimeter is generally around 1MΩ, which does not meet the requirements for measuring high-voltage voltage sources

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