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Can an oscilloscope measure high DC voltage around 100V?

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I need to measure a DC voltage of around 100V with an oscilloscope to check for noise in the signal. Is it safe to use a regular oscilloscope for this purpose, or do I need special probes?


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If you need to measure around 100V DC with an oscilloscope, here’s what to keep in mind:

  1. Oscilloscope Limit: Most scopes have a max input rating of ±300V. Exceeding this can damage the scope.

  2. Use the Right Probe: Use a 10× probe rated for at least 300V. This ensures the oscilloscope only sees 10V when measuring 100V. Avoid using 1× settings to prevent damage.

  3. Stay Cautious: If you’re unsure, double-check the probe’s rating and make sure it’s securely set to 10×. For higher voltages, consider a 100× probe.

Always know your scope’s and probe’s specifications. If in doubt, don’t risk it without confirming your setup is safe.


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