1, Classification of current for DC resistance testers

1. Small current: usually 10 milliamperes, used to measure high resistance and low power resistance.

2. High current: generally 1 ampere, 5 ampere, 10 ampere, etc., used to measure low resistance values and high-power resistance.

2, Principles for selecting the current of a DC resistance tester

3, Specific current selection plan

1. Low current

When the resistance value of the tested resistor is large and the power is low, a small current should be selected for testing. Generally speaking, when the resistance value of the measured resistance is above 100 ohms and the power is 0.25 watts or less, it is better to choose a small current of 10 milliamperes for testing.

2. High current

When the resistance value of the measured resistance is small and the power is high, a high current should be selected for testing. Generally speaking, when the resistance value of the measured resistance is less than 100 ohms and the power is above 0.25 watts, it is better to choose high currents such as 1 ampere, 5 ampere, or 10 ampere for testing.

4, Summary