The latest firmware updates can be placed on an SD card. The SD card can then be used to update the controller or device firmware.
A PC and a USB card reader or another device capable of reading an SD card is necessary.
1. Find the zip file at https://www.hachflow.com/flow-data-software/software_download.cfm or https://www.hach.com and copy it to the PC.
2. Extract file(s) from the zip folder and save them to the SD card.
3. Remove the SD card and update the controller and device firmware.
**Instructions on updating are in the extracted files.