How to measure the resistance of the multimeter
Measuring resistance is a fundamental skill in electronic engineering and circuit repair. A multimeter (also known as a multimeter) is a common tool for measuring resistance. This article will introduce in detail how to measure resistance using a multimeter and provide structured data to help you quickly grasp the operation steps.
1. Preparation
Before measuring resistance, the following preparations are required:
| step | Operation Instructions |
|---|---|
| 1 | Ensure that the multimeter battery is sufficient |
| 2 | Turn off the power supply of the circuit under test |
| 3 | Select the right resistance range |
| 4 | Insert the watch pen into the correct jack (usually COM and Ω jacks) |
2. Steps to measure resistance
Here are the specific steps for measuring resistance using a multimeter:
| step | Operation Instructions |
|---|---|
| 1 | Adjust the multimeter knob to resistance measurement (Ω) |
| 2 | Select the range according to the estimated resistance value (such as 200Ω, 2kΩ, 20kΩ, etc.) |
| 3 | Contact the two ends of the resistor (no positive and negative poles) |
| 4 | Read the resistance value on the display |
| 5 | If "OL" or "1" is displayed, it means that the range is exceeded and the range needs to be increased. |
3. Things to note
The following points should be paid attention to when measuring resistance:
| Things to note | illustrate |
|---|---|
| 1 | Do not touch the metal part of the meter pen during measurement to avoid affecting the measurement results. |
| 2 | Make sure the resistor under test is disconnected from other circuits |
| 3 | Avoid measurements in humid or high temperatures |
| 4 | When measuring high resistance values, it may take longer to stabilize readings |
4. Frequently Asked Questions
Here are the common questions and answers about multimeter measuring resistance:
| question | answer |
|---|---|
| Why does "OL" appear when measuring? | It means that the current range is exceeded, the range needs to be increased or check whether the resistor is open. |
| What should I do if the measurement results are unstable? | Check if the pen contact is good, or try to replace the battery |
| How to measure resistance on a circuit board? | Power off first and make sure at least one end of the resistor is disconnected from the circuit. |
5. Summary
Using a multimeter to measure resistance is a simple but detailed operation. By selecting the right range, ensuring good contact, and following the correct steps, you can measure the resistance values accurately. Mastering this skill will help you better perform circuit detection and repair work.
If you are a beginner, it is recommended to practice a few more times to familiarize yourself with the operation process. As you accumulate experience, you will be able to complete resistance measurement tasks quickly and accurately.
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