/dev/fram sounds like non-volatile hardware storage. ie a few kb of flash on the board.
If the app is accessing it then it sounds like important stuff is stored there. At a guess: calibration data + passwords
But that's only a guess.
Is there any way you could
cat /dev/fram > file on the equipment? If the program only uses normal reading & writing syscalls to /dev/fram then you can probably just create /dev/fram as an ordinary file on your test linux setup. Regardless: you will want to look inside your device's fram with a hex editor to see if it stores anything useful.
I should add a disclaimer at this point: I assume you actually own this machine and are not renting it or otherwise have it under some support contract. It looks like this model is EOL so it's probably a safe guess, and if the company won't give you a password for an EOL machine that you own so you can calibrate/repair/etc it then that's just evil.