Throw the 2 bottles of solution in your sump to get it up to temp. Make sure u don't contaminate your solution - dry the probe before dunking in the solutions.
Follow the directions from DA to the T. If u need em let me know. You will need to recalibrate it frequently. Also make sure you don't rely on it - before you buffer, check it with a test kit. I personally don't trust my PH probe at all right now.