Use a serial terminal (like RealTerm or PuTTY) with the Keller command set. Not user-friendly.
The wizard will offer to install FTDI or Prolific USB-to-serial drivers. Do not skip this – they are essential for connecting to Keller loggers via USB. keller logger 5.3 download
Some antivirus programs flag legacy installers as false positives. Disable real-time protection only during installation. Use a serial terminal (like RealTerm or PuTTY)
If you are using version 5.3 only for legacy support but wish to modernize, note the following: The wizard will offer to install FTDI or
Since Keller no longer hosts this version publicly, follow these legitimate steps:
Go to the official Keller AG website (www.keller-druck.com) and navigate to the “Support” or “Download Center” section. Look for “Legacy Software” or “Archive.”