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| Uni-T UT61E slowly returns to zero in all AC modes. Should I keep it or return? |
| << < (3/6) > >> |
| Serg65536:
--- Quote from: J-R on August 14, 2023, 08:51:07 am ---The manual says AC TRMS measurements are only applicable from 10% to 100% of range. --- End quote --- I'm not talking about True RMS measurements, I'm talking about any measurements hidden below those decaying numbers. :-// |
| J-R:
--- Quote from: Serg65536 on August 14, 2023, 09:06:04 am --- --- Quote from: J-R on August 14, 2023, 08:51:07 am ---The manual says AC TRMS measurements are only applicable from 10% to 100% of range. --- End quote --- I'm not talking about True RMS measurements, I'm talking about any measurements hidden below those decaying numbers. :-// --- End quote --- All the AC measurements are True RMS measurements, so the 10% minimum would apply. |
| 2N3055:
TrueRMS chips have filters on output. Otherwise you would see numbers pulsating at low frequencies. Filter means capacitors, they have to discharge.. There is compromise between lowest frequency you can measure and discharge time. It is normal. Meter is not broken. Meters that have limited BW or those that directly sample digitally will not have same behavior. |
| Serg65536:
--- Quote from: Fungus on August 14, 2023, 06:34:51 am ---Doesn't seem normal to me. --- End quote --- And here is another glitch: it jumps back and forth continuously if 9V battery is measured in AC mode. https://youtu.be/wRiDpvmHxmo |
| Serg65536:
--- Quote from: 2N3055 on August 14, 2023, 09:15:22 am ---... Meters that have limited BW or those that directly sample digitally will not have same behavior. --- End quote --- And what about another glitch: my UT61E jumps back and forth continuously and beeping if 9V battery is measured in AC mode? https://youtu.be/wRiDpvmHxmo |
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