Updating the firmware (embedded software) of a 6270A pressure controller is very easy and only requires a USB cable, a computer with a USB port and the firmware files.
The current main version is 1.10 and was released February 10, 2020.
The current PCM version is 1.04 and was released January 28, 2019.
View the instructions and download the firmware file(s) from the following web page. Note that you must have a login to the flukecal.com website to download the firmware. A "Login" link is on the same web page if you need to register. http://us.flukecal.com/literature/software-downloads/firmware/6270a-embedded-software
If you prefer to update by 9-pin RS232 null modem cable, then view this page, https://us.flukecal.com/literature/software-downloads/firmware/6270a-embedded-software-update-serial-rs-232-port
You can also view the changes, fixes and additions for each revision on the above pages.
The 6270A Operators Manual and Programmers Manual were updated in mid-2018 with new features and commands of the new firmware. Manuals can be downloaded from this page,
If you have questions, contact Fluke Calibration Pressure Technical Support at the below link or by calling 1-877-355-3225