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TA018電流プローブの遅延と立ち上がり特性 SUSHI / JJ0PPM from quixotia.com

Introduction

If you’re an electronics enthusiast or professional, you know how important an oscilloscope is in your work. It’s a tool that helps you visualize and analyze electrical signals. However, there are times when you need to measure current along with voltage. That’s where current probes come in. In this article, we will discuss the basics of using an oscilloscope current probe.

What is a Current Probe?

A current probe is an accessory that you can attach to your oscilloscope to measure electrical current. It works by using a magnetic field to sense the current flowing through a conductor. The probe converts the magnetic field into a voltage that the oscilloscope can display.

Types of Current Probes

There are two types of current probes: passive and active. Passive current probes use a resistor to convert the current into a voltage. They are simple to use and affordable but can only measure low currents. On the other hand, active current probes use electronics to convert the current into a voltage. They can measure high currents, but they are more expensive and complicated to use.

Connecting the Current Probe

Before connecting the current probe, make sure that the oscilloscope is turned off. Connect the probe to the oscilloscope’s input channel. The probe’s output connector should be connected to the conductor you want to measure. Also, make sure that the probe is properly calibrated before use.

Setting Up the Oscilloscope

Once the probe is connected, turn on the oscilloscope. Set the vertical scale to the appropriate voltage range. You can do this by adjusting the volts per division (V/div) setting. Next, set the horizontal scale to the appropriate time range. You can do this by adjusting the time per division (T/div) setting. Finally, set the trigger level to the appropriate voltage level.

Measuring Current

To measure current, you need to use the oscilloscope’s math function. First, select the channel that the current probe is connected to. Next, select the math function for that channel. You can do this by pressing the math button and selecting the appropriate function. Finally, adjust the scale and offset of the math function to get the correct reading.

Interpreting the Results

Once you have the correct reading, you can interpret the results. The waveform displayed on the oscilloscope shows the current flowing through the conductor. You can use this waveform to analyze the electrical signal and troubleshoot any issues.

Conclusion

An oscilloscope current probe is a useful tool that helps you measure current along with voltage. By following the steps outlined in this article, you can use a current probe with your oscilloscope with ease. With the right setup and interpretation, you can analyze the electrical signal and troubleshoot any issues that arise.

References:

https://www.tek.com/support/faqs/what-oscilloscope-current-probe
https://www.keysight.com/us/en/assets/7018-04109/application-notes/5992-0406.pdf
https://www.electronicdesign.com/test-amp-measurement/article/21801979/how-to-use-current-probes-with-an-oscilloscope