Updating the firmware (embedded software) of an 8270A or 8370A pressure controller is very easy and requires only a USB memory stick, a computer with a USB port, and the firmware files. The process is different from the process used with the similar 6270A pressure controller.
View the detailed instructions and download the firmware file 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. https://us.flukecal.com/literature/software-downloads/firmware/8270a-8370a-embedded-software
You can also view the changes, fixes and additions for each revision on the above page.
The 8270A/8370A Operators Manual, Specifications and Programmers Manuals can be viewed or 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