Sentrac upgrade instructions			2023-10-31 

- Copy the folder "upg" (containing 2 files, file.inf + sentrac_vx_xx_xx.img) to the USB-C memory stick.

- Turn on your Sentrac and wait until warm-up is ready and the operation screen is shown. (Alternatively press 3 times in the O of INFICON)  

- Attach the USB memory stick to Sentrac.
  A pop-up screen is shown indicating that an upgrade was found on the USB. (If the version is already installed, no pop-up screen will appear)

- Press the accept button to start upgrade.
  The upgrade files are now copied to internal memory. This will take 10-12 seconds.  
  A pop up screen will then appear asking you to restart the instrument.  (In software version 3.01.03 the instrument will restart automatically 
  after 10 seconds and must sometimes be restarted manually after  finalized upgrade, > 2 minutes.)

- Turn off Sentrac 5 seconds and the turn  it on again.
  Sentrac will now start the installation. During this process the front led will blink with a blue color in about 2 minutes.
  (If the front led turns red, contact service.)

- The installation is ready when the screen turns on again.

- Don't forget to remove the USB memory stick.


Note!
Downgrading to a lower version lower than 4.01.02 is prohibited (in bootloader). 
If a lower version has been copied into Sentrac there will be a prolonged boot sequence. To avoid this, redo the upgrade of 
the latest release (only the copy file process will be performed) or remove file "sys\upg\file.inf" from the SD file system. (Menu Diagnosis / Files)