another ph cal problem

grafxalien · Post by **grafxalien** » Fri Apr 06, 2012 1:15 pm

i am having trouble calibrating my pH probe. Here is what I did:
1. select ph cal from menu
2. put probe in 7 fluid, wait 20 min; number was 512
3. rinse probe
4. put probe in 10 fluid, wait 20min; number 519
5. press ok, goto main screen
6. go to reef angel client, enter in my two pH cal numbers

When I put probe back in the 10 solution, i get reading of 9.2.

Any ideas on how to fix?

rimai · Post by **rimai** » Fri Apr 06, 2012 1:20 pm

The first number seems correct, but the second doesn't.
Is the number you are writing down, the center number?
Can you check if the tip of your probe has a glass bulb?

grafxalien · Post by **grafxalien** » Fri Apr 06, 2012 1:30 pm

yes, i am writing down the center number. I cant see any obvious defects on the glass bulb

rimai · Post by **rimai** » Fri Apr 06, 2012 1:32 pm

Can you dip in the vinegar and see which number it is giving you?

grafxalien · Post by **grafxalien** » Sun Apr 08, 2012 4:53 pm

508 in rice vinegar. doesn't smell to strong for vinegar, so im guessing not a whole lot of acetic acid in there, but still, pH has to be less than 7..

grafxalien · Post by **grafxalien** » Sun Apr 08, 2012 5:08 pm

505 in the electrolyte solution it came shipped in

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