Why the derating curve matters - probing pitfalls

Posted By : Lanna Cooper

Learn how to read the derating curve of your passive probe and the dangers of not following it. If you don’t follow your probe’s derating curve, you could damage your probe leading to flawed measurements.

In this episode of Probing Pitfalls, Melissa explains the dangers of ignoring the derating curve of your passive probes.

She’ll also explain how to read and follow derating curves. You’ll leave the video with an understanding of what the derating curve is, how to determine safe measurement constraints for the probe you are using, and the consequences of measuring beyond the derated specifications of the probe.

She will explain:

  • Frequency changes the capacitive reactance of a probe - as frequency increases, the probe’s capacitors are more susceptible to being damaged with respect to voltage
  • Power, resistance, and dissipation factor effect the voltage derating of a probe in addition to frequency and capacitance
  • The derating curve specific to your probe can be found in its datasheet

Stay tuned for future Probing Pitfalls episodes covering common probing mistakes and how to avoid them to ensure you are making accurate measurements.


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