Good morning. I re-calibrated my PH pen yesterday like I do once a week and its reading .3 high in the two step calibration. In the 7.0 solution its reading 7.3 and 4.0 solution it reads 4.3. Should I be offsetting the difference when I’m PHing my water?
For example: if Im shooting for 6.5, should I actually be PHing down to 6.2 because of the .3 difference?
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From the Apera web site:
If the difference is greater than 0.3 pH, in most cases it’s the pH probe’s problem –– either it gets contaminated, damaged, or it’s just aged and passed its service life (usually 1 to 2 years depending on frequency of use, test samples, and how well it’s maintained). If this occurs, firstly make sure the glass sensor is intact (not broken or damaged); then try cleaning the probe thoroughly in soap water with a soft brush and then soak it in the storage solution for 12-24 hours. If that still doesn’t work, it’s time to replace your pH probe (if it’s replaceable) or send in the tester to us for repair or replacement just so you can always get reliable results.
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Thanks. Ill try cleaning it and recalibrate.
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It is. Amazon sells them. I’ve had my meter for 2 - 3 years and I’ve had to replace the probe once.
https://smile.amazon.com/s?k=apera+probe+replacement&ref=nb_sb_noss
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@Khaos850 I would try a couple of things Clean the eye gently with a wet Q tip. Start with a fresh 4 an 7 ph solution to calibrate. Replace batteries. Also when not in use need to be stored with eye wet. If that don’t get it replaced eye for about 30 bucks. I replaced mine one time in 5 years. Good luck
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Thanks everyone. Ill try cleaning and recalb. Its not even a month old yet so I would hope I don’t need to replace anything yet.
@kellydans it has always been stored in tap water like it says to do.
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Make sure that when you store it you store it in the provided storage solution. This should prevent a film buildup on the probe that may affect readings. Also the calibration solutions can become contaminated. I discard the solution once used.
@Khaos850 I store mine in a cap full of 4 PH solution also just remember your calibration is no better than your solution.
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Thats a very good point. Theres a chance maybe a couple drops of tap water got into the solution and raised the PH?
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When going from 4 to 7 PH solutionon on a 2 point calibration . Be careful not to contaminate your solution.
I always dry the probe off well prior to changing liquids. Who knows? Ill give it another shot here in a few. Thanks a lot
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You have a good ph meter , Once calibrated you should not need to Calibrate but about once a month. You can keep a clean fresh bottle of 7 PH solution to verify occasionally.
IIRC, per the manual that came with mine, you should simply rinse in distilled water between changing liquids.
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My Apera ph20 started reading off. Got the ph60 and any time it touches a liquid, be it feed in, runoff, mixing, whatever, I rinse it with distilled water. Before it goes back in the case I rinse it and make sure it is dry, then use fresh storage solution. Every time.
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this is going to be silly question. What is the storing solution for apera 20? I have just been putting couple drops of tap water in the cover.
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Thats what I’ve been doing to store mine as well due to it being per instruction. @beachglass
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Did u get the solution with your tester. mine says to clean then store with few drops water
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You’ll want to store with 4.0 solution if you don’t have the storage solution. The ph20 doesn’t come with the storage solution. The ph60 does.
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Thank you just ordered it.
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