Timeline for How to measure high-voltage and high-frequency ripple?
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
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| Jun 24, 2016 at 22:05 | answer | added | Autistic | timeline score: -1 | |
| Jun 2, 2016 at 2:30 | vote | accept | Marcovecchio | ||
| Jun 2, 2016 at 2:30 | history | edited | Marcovecchio | CC BY-SA 3.0 |
Update after more testing
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| May 31, 2016 at 14:44 | comment | added | Marcovecchio | @Sparky256, indeed, now I start to understand the reasons behind the high prices of these probes. And as a curiosity, the HV probe I'm using is borrowed from a friend. He paid around $300 for it, but it doesn't have any capacitor inside, only HV resistors. Not so expensive as the probes you mentioned, but expensive enough to make we expect some level of sofistication, which doesn't seem to be present in it. Now I understand why it's rated for 60Hz only. | |
| May 31, 2016 at 0:06 | comment | added | user105652 | @Marcovecchio. I used oscilloscope probes by Tektronix, rated for 20KV max at 75MHZ(-3db), but they are $1200 USD each. The problem with a DIY version is not the 1G ohm resistors you need, but how to put a capacitor rated for several KV in parallel with it so you get a flat frequency response. | |
| May 30, 2016 at 20:14 | answer | added | dmitryvm | timeline score: 3 | |
| May 30, 2016 at 20:01 | comment | added | Marcovecchio | @PlasmaHH, this is what I suspected, because the only test I could do to be sure the probe was working ok, was to measure mains voltage. It measured beautifully, but it's only 60Hz, so this test doesn't guarantee it will also work for voltages oscillating at some kHz. | |
| May 30, 2016 at 19:23 | comment | added | PlasmaHH | I have seen some DIY instructions for high voltage probes and a few youtube videos. The biggest problem is getting a relatively flat frequency response. Often you form RC filters from the used resistances and parasitic capacitances that mess all up. | |
| May 30, 2016 at 19:20 | answer | added | Marcus Müller | timeline score: 0 | |
| S May 30, 2016 at 19:12 | history | suggested | Marcus Müller | CC BY-SA 3.0 |
the canonical unit of measuring resistance is Ω , not R! 10³=k, not K.
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| May 30, 2016 at 19:11 | review | Suggested edits | |||
| S May 30, 2016 at 19:12 | |||||
| S May 30, 2016 at 19:11 | history | suggested | Marcus Müller | CC BY-SA 3.0 |
the canonical unit of measuring resistance is Ω , not R!
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| May 30, 2016 at 19:10 | review | Suggested edits | |||
| S May 30, 2016 at 19:11 | |||||
| May 30, 2016 at 19:00 | history | edited | Marcovecchio | CC BY-SA 3.0 |
added 183 characters in body
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| May 30, 2016 at 18:53 | history | asked | Marcovecchio | CC BY-SA 3.0 |