I need help with my PH tester pls!

I recently got the digital hanna 98103 and have calibrated it with the solution. Is it right that everytime I turn it on it reads a different ph level? Also I checked my cm and it said 5.01 then a couple of hours later I turned it on and it read 8.47, so tested cm again and it didn't change! Pls help I'm not sure how to get the correct cm reading?x

Bump.

I also have the same Hannah and recently had athe electrode replaced because it was not calibrating properly. I was wondering the same thing. When everbody turns their Hannah on before checking PH what reading does it say?

 Have you read this thread http://www.in-gender.com/cs/forums/t/92740.aspx ?

Their tech support is amazing.  Go to the US website and do the live chat, they are so helpful... Good luck!

Thanks I'll try that x

There tech support is great! They sent me out another electrode the same day I called. I was just wondering though what your testers read (the number)the second you turned it on before you tested your PH?