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| LCR meter opinion |
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| tautech:
Martin, probably a bit unfair to compare devices using 4GSa/s and 1GSa/s DSO's. |
| nctnico:
--- Quote from: Martin72 on January 26, 2022, 08:46:58 pm --- --- Quote from: indman on January 26, 2022, 07:46:03 pm ---I strongly disagree, there is reason for concern, because the difference in the results for U1733 20 times, for DE-5000 - 80 times! --- End quote --- Hi, What have we done... We´ve measured cap values beyond their claimed specs. In a meter-range with mostly undefined specs(in case of the de5000, for the two others I must have a look in their specs.) This is not the way it should go. Normally you got a look at the datasheet from the cap-manufacturer, on which frequency the values based. For example, wima their special snubbercaps, all the values mentioned in the spec were measured with 10khz. It makes no sense to measure the cap with 100khz and judging about the displayed values. --- End quote --- That doesn't matter. The readings should still agree. |
| Martin72:
@tautech: Hm? Shouldn´t make a difference in this case... @nctnico: --- Quote ---That doesn't matter. The readings should still agree. --- End quote --- Agree to what ? |
| nctnico:
--- Quote from: Martin72 on January 26, 2022, 09:25:59 pm ---@nctnico: --- Quote ---That doesn't matter. The readings should still agree. --- End quote --- Agree to what ? --- End quote --- Between eachother. All LCR meters measure the capacitance at a given frequency. So in whatever way the DUT is affected by the frequency, they should read the same value (within their accuracy specification). |
| Martin72:
They do, see the values at 1khz and 10khz. At 100 khz they differ for some reasons, but they all are in their specs. |
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