Common problems and treatment of 20a DC resistance tester

Necessary test items for factory test, installation, handover test and preventive test of semi-finished products and finished products in transformer manufacturing can effectively find manufacturing defects of transformer coil, such as material selection, welding, loose connection parts, lack of strand, disconnection and hidden dangers after operation.

 

In order to meet the needs of fast measurement of transformer DC resistance, our company has developed a 20A DC resistance tester zc-205a DC resistance tester with its own technical advantages.

 

 

Zc-205a DC resistance tester adopts a new power technology, which has the characteristics of small volume, light weight, large output current, etc. the whole machine is controlled by single chip microcomputer, and can automatically complete self inspection, data processing, display and other functions, with automatic discharge and discharge indication functions.

 

The instrument has the advantages of high accuracy, simple operation and fast measurement of direct resistance of transformer. In the process of measurement, if the operation is improper, some problems may occur, so this article teaches you some solutions to some common problems of this instrument.

 

Common problems and solutions of zc-205a DC resistance tester:

 

1. DC resistance tester can’t test (,) buzzer keeps beeping

 

In this case, the DC resistance tester shall first check whether the temperature protection is available, and first check whether the fan works normally. If the fan works normally, it can be started without testing to let the fan cool down and then retest.

 

2. The LCD screen of the DC resistance tester cannot be lit when it is turned on

 

In this case, first check whether the power supply is normal, and then check whether the fuse has been blown, such as fuse replacement.

 

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

 

In this case, the DC resistance tester of the transformer shall be restarted first, press the reset key once, and adjust the brightness adjustment key. Brightness adjustment key: when the contrast is large, adjust downward; otherwise, adjust upward.

 

 

4. “Charging…” indicates a drop in current

 

The transformer DC resistance tester adopts the automatic selection of 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. The test process always shows “charging…”

 

 

In this case, the problem of magnetic circuit of transformer shall be eliminated firstly. If the current does not change for a long time, the circuit shall be checked for open circuit.

 

Of course, as long as you use the instrument according to the product manual, there will be no problem. If you encounter other problems in the use process, you can contact our customer service at any time.