Press the “Confirm” button to stop the test. The instrument power will automatically disconnect from the winding, and discharge at the same time. An audible alarm will sound. At this point, the display returns to the test interface. You can enter the test by selecting different current gear keys. After the discharge alarm ends, you can reconnect the wires for the next measurement or remove the test line to end the measurement. Note: If no operation is performed for 15 minutes, the instrument will automatically shut down.
Handheld DC Resistance Tester Charging
When the battery power indicator shows insufficient charge, please turn off the power switch and insert the charger into the charging socket to start charging. The red indicator light of the charger indicates that it is charging. When the charging indicator light turns green, it means the battery has been fully charged. Do not over-discharge the battery; otherwise, it will be damaged.
Special Note:
When the instrument is not used for a long time, it is recommended to charge and maintain it once every month to prevent the battery from self-discharging and being depleted, which could damage the battery!
It is strictly prohibited to charge the instrument with non-specific power adapter provided by our company; otherwise, it may cause an explosion!
Cautionary Notes for the Use of Handheld DC Resistance Tester
Before performing the reverse connection of the no-load voltage regulating transformer, it is necessary to reset the device. After the discharge process is completed and the alarm sound stops, the tap switch can be switched.
When measuring the resistance on the high-voltage side of a transformer with on-load tap-changing function, start the measurement from the larger resistance range (1 or 17).
Before removing the stitches, make sure to wait until the discharge process is complete and the alarm sound stops before proceeding with the removal.
When choosing the current, refer to the range in the technical indicators column. Do not exceed the range or use an under-range. When using an over-range, since the current cannot reach the preset value, even if you forcibly continue the test, the result stability will be poor. When using an under-range, the current is too small, and the data for large-capacity transformers will be unstable. When these two situations occur, confirm the range and select the appropriate range for the test.
The test data is unstable or has large errors. In such cases, the first step is to check the test line to see if there is any loose connection or loosening. For example
If the problem still cannot be solved, check whether the test sample is rusted.
During the testing process, the display always shows “Charging…”. In such cases, the first thing to do is to rule out the problem with the magnetic circuit of the transformer. If the current has not changed for a long time and remains near zero, then the lines should be checked for any open circuit phenomena.
During the testing process, if the battery power is insufficient, you can connect a charger for emergency testing.
Post time: Mar-12-2026