Products > Test Equipment
Uni-T launches the UT117C multimeter
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makz:

--- Quote from: gamalot on September 07, 2023, 07:12:22 pm ---
--- Quote from: makz on August 26, 2023, 05:33:50 pm ---can someone upload a dump of EEPROM P24C02A?

--- End quote ---

Here is mine.

--- End quote ---
I tried to upload yours firmware, my device greatly underestimates the voltage (- 0.1%). I noticed that I have a soldered eprom, so the firmware may be from another unit :(
makz:

--- Quote from: geb on August 28, 2023, 07:24:16 pm ---
--- Quote ---can someone upload a dump of EEPROM P24C02A?
--- End quote ---

Ok!  :-+

--- End quote ---
I've uploaded yours firmware, it's a little more accurate than mine. If someone else posts the firmware, I can choose the optimal one))
geb:

--- Quote ---I tried to upload yours firmware, my device greatly underestimates the voltage (- 0.1%). I noticed that I have a soldered eprom, so the firmware may be from another unit :(
--- End quote ---
Are you saying your EEPROM appears hand-soldered? Anything's possible, but the rework could be for a more innocent reason.
makz:

--- Quote from: geb on September 14, 2023, 02:14:27 am ---
--- Quote ---I tried to upload yours firmware, my device greatly underestimates the voltage (- 0.1%). I noticed that I have a soldered eprom, so the firmware may be from another unit :(
--- End quote ---
Are you saying your EEPROM appears hand-soldered? Anything's possible, but the rework could be for a more innocent reason.

--- End quote ---

My unit was used and sold as new. So, its was deception. There are components on the board that are not yet factory, I’ll try to restore its accuracy. I hope eeprom from my device

I think I've found a calibration constant for DCV. Now DC voltage correct. I'll check other functions later
geb:
Hmm, how do you know it was used? Reworking a board is normal, especially in early production. Was there other evidence besides the EEPROM?


--- Quote ---I think I've found a calibration constant for DCV.
--- End quote ---

Excellent! Does the change affect all DCV ranges, or just one? And if it affects all DCV ranges, do you notice any change in resistance ranges?
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