Are you referring to the Hanna Hardness meter? You say it is a pH meter, this would not be an indicator of hardness at all, and the numbers you are stating would make for some very nasty water.
Honestly, use a Hach 5B test kit.
Check out the link, are you using the Hanna tester with the chart? http://www.hannainst.com/manuals/manHI_98202.pdf
A standard Hach 5B is much simpler, more accurate, and does not need calibration.
What softener? What size? How hard is your water? What does your system feed? How many people in the house? Does it feed irrigation? What is the raw water hardness? More information is needed to answer your question.