How to test the motor with a DC resistance tester How to test the transformer with a DC resistance tester

How to test the motor with a DC resistance tester

The method of using a DC resistance tester to measure a motor is as follows:

1. Preparation: Make sure the motor is stopped, disconnect the power supply, and ensure the motor has cooled down.

2. Connect the tester: Connect the test clamps of the DC resistance tester to the two measurement points of the motor. Usually, one test clamp is connected to the stator winding of the motor (usually one end of one of the coils) and the other test clamp is connected to the armature winding of the motor (the rotating part of the motor).

3. Test setup: Select the appropriate measurement mode and range according to the tester's operating instructions. Make sure the tester's measurement range covers the resistance value of the motor being measured.

4. Take the measurement: Turn on the tester and trigger the measurement. The tester will apply a small DC current to the motor windings and then measure the resistance of the motor.

5. Record the measurement results: After the measurement is completed, record the resistance value. Usually, a motor will have multiple windings (such as stator windings and armature windings), which can be measured and the results recorded in turn.

It should be noted that before measuring the motor, it is recommended to consult the motor's technical data or the specifications provided by the manufacturer to understand the standard resistance value range and compare it with the measurement results to determine the health status of the motor.

Additionally, be careful and safe when testing the motor. Follow the safety instructions in the operator's manual and use appropriate personal protective equipment.

How to test transformer with DC resistance tester

The method of measuring transformer using DC resistance tester is as follows:

1. Preparation: Make sure the transformer is stopped, disconnect the power supply, and ensure the transformer has cooled down.

2. Connect the tester: Connect the test clamps of the DC resistance tester to the low-voltage winding (usually the end of the high-voltage winding) and the end of the high-voltage winding of the transformer. Note: When measuring the high-voltage winding, be careful to maintain a safe distance and operate correctly to avoid the risk of electric shock.

3. Test settings: According to the operating instructions of the tester, select the appropriate measurement mode and measurement range. Make sure that the measurement range of the tester can cover the resistance value of the transformer to be measured.

4. Take measurements: Turn on the tester and trigger the measurement. The tester will apply a small DC current to the transformer winding and then measure the DC resistance of the transformer.

5. Record the measurement results: After the measurement is completed, record the DC resistance value. Usually, a transformer will have multiple windings (such as low-voltage side and high-voltage side windings), which can be measured and the results recorded in turn.

It should be noted that before measuring the transformer, it is recommended to consult the transformer's technical data or the specifications provided by the manufacturer to understand the standard resistance value range and compare it with the measurement results to determine the health status of the transformer.

Additionally, be careful and safe when inspecting transformers. Follow the safety instructions in the operator's manual and use appropriate personal protective equipment.

How to measure resistance with a DC resistance tester

The method of measuring resistance using a DC resistance tester is as follows:

1. Preparation: Make sure the resistor to be measured is not connected to a power source or other circuits to avoid measurement interference.

2. Connect the tester: Connect the test clamps of the DC resistance tester to the two ports of the resistor to be tested in sequence. Make sure that the test clamps are in good contact with the resistor to avoid looseness or poor contact.

3. Test settings: According to the operating instructions of the tester, select the appropriate measurement mode and measurement range. Generally, DC resistance testers have different gears or ranges. Select the range that is suitable for the resistance range to be tested.

4. Make a measurement: Turn on the tester and trigger the measurement. The tester will apply a small DC current to the resistor to be tested and then measure the resistance value of the resistor.

5. Record the measurement results: After the measurement is completed, read or record the resistance value. Generally, the DC resistance tester will display the measurement results, which can be read directly. If you need to record, you can write down the results or record them somewhere else.

A few points to note:

- When measuring, keep the test clamp in good contact with both sides of the resistor to ensure that there is no looseness or poor contact.

- Avoid contact with other electric shock parts during measurement to ensure safe operation.

- Select the appropriate range according to the resistance to be measured to obtain accurate measurement results.

- If the resistor to be measured has multiple ports, such as a multi-terminal resistor or a resistor network, you need to connect all ports in sequence for measurement.

When measuring low resistance values, it may also be necessary to consider corrections for the lead resistance and contact resistance of the resistance meter to ensure the accuracy of the measurement results.

In summary, when using a DC resistance tester to measure resistance, you need to pay attention to correct connection and operation, select the appropriate range, and follow the operating instructions of the tester.