| General > General Technical Chat |
| DMM problem in DC millivolts range |
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| dobsonr741:
The higher than normal voltage applied to the chip can explain larger than expected leakage currents. Think it as a small damage, not enough to create visible impact, other then the leakage current slowly charging up the input capacitance. |
| EPAIII:
That is an undocumented feature: an RF signal strength meter. Just add a proper, calibrated dipole antenna and a resonant circuit and you have an expensive instrument. 8) |
| amir.razzaqi:
--- Quote from: EPAIII on July 19, 2023, 10:07:24 am ---That is an undocumented feature: an RF signal strength meter. Just add a proper, calibrated dipole antenna and a resonant circuit and you have an expensive instrument. 8) --- End quote --- :palm: :palm: :palm: |
| tooki:
Did you actually get anything out of the EEPROM? I wonder if it’s possible that you inadvertently erased or damaged the EEPROM, and that the behavior you’re seeing is because the main chip is not finding the correct configuration in the EEPROM. |
| amir.razzaqi:
--- Quote from: tooki on July 19, 2023, 03:25:02 pm ---Did you actually get anything out of the EEPROM? I wonder if it’s possible that you inadvertently erased or damaged the EEPROM, and that the behavior you’re seeing is because the main chip is not finding the correct configuration in the EEPROM. --- End quote --- I already read and learn about the data structure of this DMM's EEPROM. If there was a big problem in EEPROM then the multimeter must showed "Err E" in addition I active write protect futures of EEPROM while reading it. |
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