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| New UNI-T UT892 2000V AC/DC High Voltage Multimeter |
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| PartialDischarge:
So here are some more tests For the 1000V input, AC test up to 2kVrms, there is a limiting device that trips at around 1.9kVrms: For the 2000V input, AC test up to 4kVrms, no problems, although this is with the 760k resistor up front instead of the original PTC: For the 2000V input, AC test up to 5kVrms, no problem, current meter reads 250uA as expected, I don't really see the point in going further, 5kVrms is 7kV peak. |
| joeqsmith:
Thanks for taking the time to make these clips. Would you consider getting a second meter to repeat the tests without the mods? May be interesting to see you sweep the voltage as well. |
| PartialDischarge:
--- Quote from: joeqsmith on September 10, 2022, 02:43:22 pm ---Thanks for taking the time to make these clips. Would you consider getting a second meter to repeat the tests without the mods? May be interesting to see you sweep the voltage as well. --- End quote --- I don't just need another one cause this one is fine and I'm going to use it, but I can short the PTC and test again, that'll be easier. |
| joeqsmith:
No concerns about the unknown resistors? |
| PartialDischarge:
--- Quote from: joeqsmith on September 10, 2022, 05:25:12 pm ---No concerns about the unknown resistors? --- End quote --- I'm more concerned about a 2 inch trace running in the PCB from the input. Resistors if they are bad they will change their properties a lot but they are not going to suddenly short to 0. |
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