What is the purpose of an ohmeter?

The purpose of the ohm meter

Ohm meter is an electrical measurement tool specially used to measure resistance values, and its working principle is based on Ohm's law of closed circuits. The following are the main uses of ohmmeters:

• Direct resistance measurement: The ohmmeter can directly measure the resistance value of the resistor in the circuit, which is very useful for the design and fault diagnosis of electronic circuits.

• Judge the circuit status: By measuring the resistance, the ohmmeter can determine whether there is a break or short circuit in the circuit. For example, if the measurement shows that the resistance is infinite, it may indicate that the wire is in a disconnected state.

• Select the right measuring range: The ohmmeter's measuring range selection device allows the user to select the right measuring range based on the estimated value of the resistance to be measured for more accurate measurement results.

• Calibration and debugging: Ohmmeters can also be used to calibrate resistance measurement functions in other electronic devices, or to help locate problems during circuit debugging.

• Electronic component testing: Ohmmeters can measure the positive and negative electrodes of diodes, as well as check the performance of electronic components such as transistors.

• Circuit design and analysis: In the circuit design phase, Ohm tables can help engineers verify the theoretical model of the circuit and ensure that the actual circuit matches the design.

To sum up, ohmmeters have a wide range of applications in electronic maintenance, circuit design, component testing and fault diagnosis.