My current 2182 firmware is A07, which is not what user manual is requiring to operate in delta mode. Note on user manual page 78 lists:
Firmware files for EEPROM is what I ask (U157,U158 chip, which are ATMEL AT49F040 chips). I tried to search firmware on Tektronix side but only C06 is available, which is for newer 2182A. I do have standalone firmware programmer and qualification to read/write ATMEL EEPROM, so just need a binary dump to write new ROM chips and reinstall them in the meter. My 6221 firmware version is A05.The firmware version of the Model 2182 must be A10 or higher.