Hmm, Hmm, well, a few things, you should calabrate about every 3 sessions, but I don't, I found that it is usually with in about 2 of calabrated numbers, but you have to get to know your pen. We don't touch the tip with our fingers , but we do wipe ours down after useing each time for the most part. Some people calabrate theirs every other session, but it is really up to you. Just get to know your particular pen and it will start to be easy for you, give it a week or two and you'll have know questions IMO.
Adieu
BlueBear Reviewed by BlueBear on . Ph Meter Question... I got a Phep4 Ph Meter today thu ebay. I went to my local grow store and bought Calibrating solution as well as electrode storage solution. As I was told I would definetly need these. Downlaoded the manual, read it understand that the Ph meter has to be cal 'ed and you must keep a drop or 2 of the electroide solution in the cap so it keeps the electrode moist so it doesn't dry out. Why can't it dry out? Is that electroid like gold? Is it super sensitive? Should I not run it directly Rating: 5