Hold off on service, calibration, etc. It very well could just be a browser issue and before you do any of that feel free to send in a ticket. In the meantime:
- What browser
- Have you tried a different browser
- Have you tried incognito browser
- Have you cleared cache and delete cookies (or eat them I guess - who doesn't like a cookie) (note they will clear cache, data, form data, saved password, etc)
- Have you rebooted
- Lastly have you tried to extract the data via the URL and data logger?
- It is in the documentation but you could open a browser and do something like this
- http :// your.ip.address.here/cgi-bin/datalog.xml?sdate=220621&days=3
- Replace your.ip.address.here with your apex ip and you should get data back which includes the ALK, Ca, and MG
Had to break this up but I assume you can put back together the URL. I tried to break the hyperlink but it doesn't work for some reason so had to add the spaces. Apex manual will have a section on logging with examples. Or piece the one above together and place in your browser replacing with your IP.