well if u got ur messurments right, then it looks like you know how to use it
you need to add water to ur solution.
EC 2.6 is a little bit too high, and 6.0 ph is fine
if you are growing a full indica the ideal EC range is 1.6-2.3
depending on ur strain and the state of your water (whether u use filtered water or tap etc) will be what determines your ideal EC reading. if ur mainly 50/50 indica sativa cross youll want to go to the lower side of that range, etc (hypothetically)
as im sure u know ec stands for electrical conductivity, and is a more accurate way of measuring the salt content of your solution compared to a tds meter, which measures in ppm.
just keep the meter clean, dry it off completely after every use dont let salt dry up on it.
and make sure you get calibrating solution. you dont need it for the ph meter tho as long as u have something u know the ph of. for instance crystal gyser water over here always read 6.3 for me. so i use that to calibrate.
but u can get some calibration solution for that to. as well as some cleaning solution for the glass bulb- will make it last longer.
i would read up on EC, and CF (conductivity factor)
soon you will be able to accuratly tell not only the general salt content of ur water, but approximatly what nutrients are being taken up the most out of it, which is not possible when measuring in ppm.
good luck!