1. The test line of the DC resistance tester must be removed after the discharge instruction is completed. Since the output terminal of the instrument is equipped with a discharge circuit, any inductive energy will be discharged through the instrument after the instrument is reset. In order to prevent the inductive discharge from causing harm to personnel and equipment, it is necessary to wait for the discharge instruction to complete before removing the test line.

2. During the measurement process, it is not allowed to switch the tap switch during the whole test process for the no-load tapping transformer.

3. If the power supply is suddenly cut off during the test, do not remove the wiring immediately, because the DC resistance tester will automatically start to discharge, so wait at least half a minute before the wiring can be produced.

4. During the measurement, the windings that are not tested should not be short-circuited to the ground, because if this will cause the transformer magnetization process to slow down, the data stabilization time will be prolonged or the value will be incorrect.

5. Before turning on the power, be sure to check the power supply voltage: AC 220V±10%, 50Hz.

6. The DC resistance test instrument is a power-off test, so before starting the test, confirm that the equipment on the north side has been powered off and disconnected from other devices with points.

7. Before starting the test, confirm that the instrument case is reliably grounded.

8. During the test, do not pile up debris on the equipment panel or around the equipment.

9. If you need to change accessories, you need to confirm the instrument model with the manufacturer, and match it again and again.

10. When using the DC resistance tester, pay attention to prevent oil pollution and moisture.

11. When the current exceeds the range and cannot reach the preset value, the instrument will always be in the "charging" state. At this time, you need to press the reset button, and the DC resistance test instrument will be reset and then select a smaller current range. .