Top 10 Resistance Testing Methods

The resistance testing methods mainly include the following:

1. Multimeter testing method: This is the most common and basic resistance testing method. Use a high-precision digital multimeter or resistance tester to measure the resistance value of a resistor under no-load conditions.

2. Overlap test method: In circuits, this method can be used for resistance measurement. The required tools are a multimeter and two plugs. By inserting the plugs into the two ends of the circuit to test the resistance and cutting off the circuit, use the resistance range of the multimeter to measure.

3. Testing black and white line method: This is a special method of testing resistance, which is implemented on the oscillator circuit of black and white lines. Add a known resistor to the oscillation circuit and compare the missing resistor with the known resistor during the measurement process to confirm the measurement result.

4. Chip testing method: This is a method of measuring the resistance value of a chip. It uses the A/D conversion pin of a microcontroller to measure the current and voltage of the resistance inside the chip through a feedback circuit, and then calculates the resistance value of the chip.

5. Adjustable power supply method: This method is not described in detail in the search results, but usually involves using an adjustable power supply to provide a stable test voltage and measure the current flowing through the resistor to calculate the resistance value.

6. Temperature coefficient test: The temperature coefficient of resistance is an indicator that measures the change in resistance value with temperature. During testing, the resistance should be placed at different temperatures and the changes in resistance values should be recorded to calculate the temperature coefficient.

7. Stability testing: Stability testing is used to evaluate whether the performance of resistors is stable during long-term use. Testing usually includes long-term power on testing and temperature cycling testing.

8. Power testing: Power testing evaluates the thermal stability of a resistor when subjected to rated power. During testing, the resistor should be placed at rated power and its temperature rise should be measured.

9. Load life testing: Load life testing is an evaluation of the estimated lifespan of a resistor when it is in use, which is related to three factors that affect the resistor: power, temperature, and usage time. The test requires at least 1000 hours and is a destructive experiment.

10. Shelf life testing: Shelf life testing evaluates the lifespan of resistors when they are not in use but only stored in a warehouse. The shelf life of resistors depends on the stability of resistance values under storage conditions.

These testing methods comprehensively evaluate the performance of resistors under different conditions, ensuring their reliability and accuracy in various applications.