Hello all, my shiny new UNI-T UT71C came in the mail, a 40,000 count multimeter with 100 points for dataogging internally, and as soon as I got it my urge for hacking started to itch. Aside from wanting to do a fuse mod in the future to put HRC fuses in, I want to possibly upgrade this to it's bigger brother the UT71D, which is identical, aside from having 10,000 data logging points internally, and I figured the boards will be identical, and it will be the firmware that does it.
In the other thread someone was able to let me know the B and D models use the same eeprom chip, and thos does too:
http://ww1.microchip.com/downloads/en/DeviceDoc/21673E.pdfNow, here is where the hackery comes in, and where I need your help. I've never messed with EEPROM before, I hear you can use an arduino to read and write it, unsure if you can dump the rom to a file that way, if not, I need to know what tools to get to do this properly. Is there much risk of bricking it just by swapping ROM's?
I also need someone to dump the ROM of their UT71D, so that I can try replacing it, or comparing the ROMS, and hopefully that will unlock the full memory!
I look forward to your responses, this should be fun if we get what we need.
Here is a picture of the board, the EEPROM chip is under the metal shield on the top right.
![](http://i57.tinypic.com/256xyx2.jpg)
![](http://i59.tinypic.com/312tfer.jpg)