ES3080 DC resistance tester, also known as transformer DC resistance tester, is an important instrument mainly used to check whether the connection or mechanical characteristics between windings, windings and leads are good, and whether the resistance between each phase winding is balanced, in order to ensure the safe operation of transformers.

　　The transformer DC resistance tester is a new type of instrument used to measure the DC resistance of large capacity transformers. It is designed as a high-precision current stable power supply and testing component. During the testing process, it is controlled by a computer and automatically completes steady-state judgment, data acquisition, data processing, and resistance measurement. Display and print numerical values. This instrument can be used for longitudinal testing of on load voltage regulators with a primary power supply, thus completely saving testing time. It also has the temperature rise testing function of transformer manufacturers. It has the characteristics of simple operation, high accuracy, and anti-interference, and can quickly and accurately measure various types of transformers. The magnetic assist method is to generate a magnetic field by outputting current to the high winding to charge the low winding. With the help of the excitation ampere turns of the high voltage winding, a small current is passed to greatly reduce the inductance of the winding, shorten the measurement time, and achieve the purpose of fast measurement. It should be noted that when using the demagnetization method to measure the DC resistance of low-voltage windings, the current direction of the high and low voltage windings on the same iron core column must be consistent in order to have the effect of demagnetization.

　　The ES3080 DC resistance tester consists of a host, test lines, etc., and has functions such as historical data reading, viewing, saving, and printing.