Design of Small Resistance Tester Based on C8051 Microcontroller

Test - lowercase jpg
Single chip microcomputer STM32L151CCU6
Kaixin micro test
Test probe P100-M3

description:

In the circuit test process, it is often encountered that the influence of some small resistances causes a large error between the experimental data and the theoretical value, thereby affecting the test effect.

For example, in inductors and transformers, there are often copper resistors and the resistance of subway rails. Because of the small value, the general pointer multimeter cannot be measured; usually, the bridge is used for measurement in the laboratory, but the operation procedure of the bridge is annoying. The resistance of the measured resistance cannot be read directly. In view of this, we have adopted a single-chip microcomputer and designed the measuring instrument by the advantages of the single-chip microcomputer. The measuring instrument can directly read the measured resistance value from the LCD display, and the measuring range is from 10μΩ to 2.9999kΩ. At the same time, the test data can be stored and then sent to the upper computer through the serial port, through the upper computer. Powerful function to analyze and process the measured data. The tester has a measurement accuracy of ±0.1% and uses a four-terminal measurement method. The resistance value is not affected by lead length and contact resistance. Not only is the measurement simple, the reading is intuitive, and the measurement accuracy and resolution are also higher than the general bridge. Can be used in laboratories, research institutes, especially for work sites.

See the PDF document for details.

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