smokadepep
Member
Long story short, oakton ph pen crapped out on me. Searching through my old equipment I found an old ph-03(1) pen that I am pretty sure was never used. The instructions say to calibrate using a 6.86 solution then a 4.01 , the only problem is I'd have to wait about 2 weeks to have those shipped. Would my 7.01 work just as well in place of the 6.86?
