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6270A firmware update instructions, by USB cable

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.

Note that if you operate more than one 6270A controller in stacked mode, they must be updated independently and directly (not while in stacked mode).

If you prefer to update by 9-pin RS232 cable then see this article,
6270A firmware update instructions, by 9-pin RS232 cable

Download the firmware zip file from the below web page. Note that you must have a login to the website to download the firmware. A "Login" link is on this same web page if you need to register. 

1. On the 6270A go to the <Setup>, <Instrument Setup>, <Remote Port>, <USB Setup> screen and verify that "RS232 Emulation" is set to "OFF". This will enable you to drag and drop the firmware files from your computer to the 6270A.

 2. Connect the USB cable to the computer and to the back panel USB connector on the 6270A.

3. The computer should recognize the 6270A as an external drive and assign it a drive letter (just like an external USB drive or a USB flash drive).

4. Unzip the downloaded file to view the five firmware files; 6270A_main, script6270, checksum, 6270A_gui and 6270pcm.img. Copy those files to another folder on your computer (sometimes files don't transfer well from a zipped folder, from a network drive, or from an external USB drive).

They will show something like this on your computer screen

5. Drag and drop (or copy and paste) the five files from your computer to the drive letter of the 6270A. The copy will be quick so there will likely be no visible confirmation. If you are prompted that a file(s) already exists overwrite the existing file.

6. Wait at least 1 minute, then turn off the 6270A controller by the main power switch on the back panel. Leave it off for one minute then turn it back on. 

A screen will come up that shows that the firmware is updating. A blue status bar will fill as the update progresses. The status of each component (main, gui) will also show a status. Gui 1 will show before Gui 2. PCM status may or may not show. 

If everything passes, the update screen will go away to the main 6270A screen.

If something fails, "VERIFY FAILED" will be that component's status and this screen will remain. Repeat step 6 again to see if the update will work. 

7. If "VERIFY FAILED" continues to show for the PCM it might be failing because you already have the most up to date PCM firmware version. If yes, you can go back to the drive letter of the 6270A that is shown on your computer and delete the file named "6270pcm.img".

8. If the 6270A won't fully boot up (gets stuck on the last screen) the PCM update likely failed and is causing this. Power down the 6270A and remove the Pressure Control Module (PCM). Try to power up again. If it still fails power the 6270A down again for 10 seconds and power it on again. Repeating this typically gets it to the main screen again. Delete the PCM file as shown in step 7. Power down, install the PCM, and power up again. 

9. Wait for it to completely power up to the main screen then go to the <Setup>, <Instrument Setup>, <About This Instrument> screen and verify that "Revision" is correct (see additional notes regarding the current versions below). Press <Exit> to return to the main screen. 

10. Check that the Control Module firmware has been updated to version 1.01 on the Setup --> Diagnostic --> Control screen also. It is shown at the bottom-right.

11. Turn the controller off again for 5 seconds, then turn it back on again and repeat steps 9 and 10

12. If you communicate with the controller by a USB COM port go back to the <Setup>, <Instrument Setup>, <Remote Port>, <USB Setup> screen and change the "RS232 Emulation" back to "ON". Make sure that "Remote IF" is set to "Computer". If set to "Terminal" every command that you send will be echoed back.

The 6270A Operators Manual was updated with new features in April 2018. It, the Programmers Manual, and other manuals can be downloaded from this page,

Updated 09-August-2018 with:
Step 8 inserted with troubleshooting for "6270A won't fully boot up after firmware upgrade"

Updated 04-May-2018 with:
main firmware version 1.06
user interface firmware version 1.06
PCM firmware version 1.01

See this web page for 6270A firmware change log, and to download the firmware update zip file,

Do not download the firmware from the web page if the change log on that page does not show the above version numbers. Contact Fluke Calibration Pressure Technical Support at the below link or by calling 1-877-355-3225

End of Instructions

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  • Avatar

    Which features are new, ist's hard to find out in the manual? Will there be a future release, where e.g. the leakage test can be started via command?

  • Avatar
    Kyle Clark

    See this web page for 6270A firmware change log that notes new, added or changed features, 

    Leak Check is in the Tasks screen on the 6270A, and these are nested and/or multi-step functions. Because of that, there are not remote commands to support these. See this article for the logic of a leak test, and a COMPASS for Pressure Test Macro written in VB Script that performs a leak test with a 6270A.

    Edited by Kyle Clark
  • Avatar
    Robert Doyon

    Kyle/Johnny-are you recommending that everyone update their firmware at this time?

  • Avatar
    Kyle Clark

    I do recommend updating to version Main v1.05 if you don't already have that. The only improvements in Main v1.06 are to some emulation commands, and the ability to use the new PM500 modules.

    However, there appears to be a bug in Main v1.06 where the CPS (Contamination Prevention System) doesn't work - so I would not upgrade to that unless there is a compelling reason to do so, and you don't have a CPS. The only version on our website is Main v1.06 so if you need Main v1.05, create a ticket by the link below or by emailing us at and we can get it to you by a ticket, email or FTP.

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