ZC-205C three-phase DC resistance tester is a must test item in transformer manufacturing, including semi-finished products, finished products factory test, installation, handover test and preventive test of power department. The use of three-phase DC resistance tester adopts new power supply technology, which has the characteristics of small size, light weight and large output current. The whole machine is controlled by single-chip microcomputer, which can automatically complete self-test, data processing, display and other functions, and has the function of automatic discharge and discharge indication. The instrument has the advantages of high precision and easy operation, which can realize the rapid measurement of transformer direct resistance.

Common problems and solutions of DC resistance tester

Method / step

Common problems and solutions of three phase DC resistance tester

1. DC resistance tester can't test the buzzer keeps ringing

In this case, first check whether the temperature protection, first check whether the fan works normally. If the fan works normally, the fan can be turned on without testing, let the fan cool down, and then retest.

2. The LCD screen of DC resistance tester cannot be turned on

In this case, first check whether the power supply is normal, and then check whether the fuse has been blown out. If it is fused, replace it with a new one.

3. Turn on the LCD screen, but the display is abnormal or unable to display

In case of this situation, the transformer DC resistance tester should first restart and press the reset key once to adjust the brightness adjustment key. The brightness adjustment key is adjusted downward when the contrast is large; otherwise, it is adjusted upward.

4. "Charging in progress..." indicates that the current drops

The transformer DC resistance tester adopts automatic current output mode. In order to achieve stable measurement results, the measured current may be less than the charging current, which is a normal phenomenon.

5. "Charging..." is always displayed during the test

In this case, the problem of magnetic circuit of transformer should be eliminated first. If the current has not changed for a long time, it is necessary to check whether there is open circuit in the circuit.