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The DC resistance test is a measuring instrument that power workers often need to use. It is mainly used to measure the DC resistance value of power transformers. It has the characteristics of fast test speed, high accuracy, convenience and reliability, and is very popular among power workers. , Although the product is good, it is also very important to know how to use the LTZR DC resistance tester correctly.
How to use the DC resistance tester correctly After confirming that the resistance to be measured is reliably connected to the instrument, press the corresponding buttons “▼” and “▲” displayed on the screen to switch the test current.
When measuring each phase winding of the same voltage level of the same transformer, the same current should be selected for measurement to avoid causing system errors. The larger the transformer capacity, the smaller the resistance of the winding, and the larger the selected test current. Note that the measurement range of the selected test current must be greater than the actual resistance value. The test starts after pressing the “Measure” key. At this time, “Charging…” appears on the screen, and there is a charging progress bar to show the charging progress. Note: If the charging progress bar is stationary for a long time, the load being tested is too large (over range), please change to a lower current Stalls. After the charge is over, the screen prompts “Please wait while the measurement is being performed”, and the display area in the middle of the screen displays the measured resistance value. After the reading is stable, read the value, and then press the “storage” key to store the measured data or press the “print” key to print the data as needed.
If the measured resistance is out of the range that can be measured in the current range, the screen prompts “over range”. At this time, press the “Exit” key to exit the measurement, and then reselect the test current and try again.
After the Litai power measurement is over (please refer to the “Data Storage and Printing” chapter for data storage or printing data), press the “Exit” button. The machine turns off the output and returns to the initial state. Wait for the next measurement. If it is an inductive load, it will enter the discharge state, and the discharge information will be displayed on the screen at this time. After the discharge is completed, return to the measurement menu and wait for the next measurement. The discharge time depends on the inductance of the tested product.
The correct use of the DC resistance tester will also vary according to the use of the DC resistance tester produced by different manufacturers. When Litai Power is connected, it is necessary to recognize the logo on the terminal. As long as the wiring is not wrong, the general use method It’s all about the same.
