AOS version 5.03_2A18 was just released. This release is for Apex (2016) units only.

In this release:
  • Updated COR firmware from 012 to 013
  • The APEX Local "About" menu item was non-functional in AOS CA17; this release fixes that, and the "About" menu item now has APEX Local web files date & build information.
  • Addresses an issue which caused frequent APEX Fusion disconnects for some Apexes
  • Addresses an issue with dissolved oxygen probe calibration


The previous AOS release (5.03_CA17) had two very significant changes, so these are listed here for the benefit of anyone who may not have seen the announcement of that release.
  • The behavior of the reset button has been enhanced. See this sticky for details
  • APEX Local has been overhauled to give it the same new look and feel which was introduced in recent APEX Fusion updates


After updating, wait at least 5 minutes, then check the Modules page in either APEX Local or APEX Fusion; update all modules which show as #(OLD) in the SWRev column.

After updating to this AOS, a COR will still show in the Modules view as 012(OK) instead of 012(OLD); this is because the change to the COR firmware is very minor, and is not considered to be an essential or required update. If you have a COR, you may optionally update the module firmware even if it says OK. After updating your COR, it should show the SwRev as 013.