Why might the DR1900 software update not work?
DR1900 software update does not work
The DR1900 software update may not work if the same update files have previously been used to update another meter. Confirm that file names in the folder for the DR1900 are "fw_.pzip" and "config_.pzip". If the files have been used the file names will change to .log files. These .log files will not update an instrument. In this case, a new download of the software should be obtained from Hach.com.