Jadenlea Posted November 10, 2014 Report Share Posted November 10, 2014 I got tired of trying to deciper the colors on my ph test kit so I ordered a PH meter. When I read the instructions it talks about calibrating it so I got on google . I have this exact meter However, it did not come with the calibration power shown in the utube video. The calibration power is 4.0 and 6.8. Here is my question. In the video it does say you can order premade solution so I got on amazon. The only solutions I am seeing are 4.1 and 7.0. Is that close enough? Can I order those two solutions and still calibrate my PH meter? Here is a link for the solution. http://www.amazon.com/General-Hydroponics-4-01-Calibration-Solution/dp/B004HE7W42/ref=sr_1_2?ie=UTF8&qid=1415642109&sr=8-2&keywords=calibration+solution Quote Link to comment Share on other sites More sharing options...
Jadenlea Posted November 11, 2014 Author Report Share Posted November 11, 2014 nobody???? Guess Ill get it and try it Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted November 11, 2014 Report Share Posted November 11, 2014 So you don't have to keep the probe wet? Quote Link to comment Share on other sites More sharing options...
Elo500 Posted November 11, 2014 Report Share Posted November 11, 2014 Yes that should work. You'll also want storage solution to keep it in. Need to keep the tip wet all the time. Here is a good article on ph meters. http://www.barrreport.com/showthread.php/11002-Effective-use-and-care-of-pH-meters-and-probes Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted November 11, 2014 Report Share Posted November 11, 2014 Look at what he says at the 30 second mark. That is what's confusing me. "Keep it dry before recapping..." My pinpoint needs to be kept wet at all times. Quote Link to comment Share on other sites More sharing options...
Elo500 Posted November 11, 2014 Report Share Posted November 11, 2014 Don't know why he would say dry before capping. You'd have to soak it for s few hours before the next use. Soothing Shrimp 1 Quote Link to comment Share on other sites More sharing options...
Jadenlea Posted November 11, 2014 Author Report Share Posted November 11, 2014 That was an interesting article. thanks for posting it. Thanks for everyones thoughts. Quote Link to comment Share on other sites More sharing options...
JayMarshal Posted November 11, 2014 Report Share Posted November 11, 2014 Great link! I've been looking into purchasing a pH pen, very helpful article. What kind of pH pen do you have Jadenlea? Quote Link to comment Share on other sites More sharing options...
Jadenlea Posted November 11, 2014 Author Report Share Posted November 11, 2014 I think I have this one Jay http://www.amazon.com/CyberTech-PHTester-PH-107-Calibration-Included/dp/B005KGKCRA/ref=sr_1_2?ie=UTF8&qid=1415744485&sr=8-2&keywords=ph+meter+ph+-009 But it did not come with the calibration powder as stated in the description. Quote Link to comment Share on other sites More sharing options...
Dendrobatez Posted January 28, 2015 Report Share Posted January 28, 2015 I would say don't keep it dry, I had that same one but lost the directions before using it so I kept it dry. It worked great for awhile but after about 2-3 weeks it wouldn't read properly so I looked online and it was because I kept it dry Quote Link to comment Share on other sites More sharing options...
mayphly Posted January 28, 2015 Report Share Posted January 28, 2015 I have few of the cheap pocket PH pens. They work pretty good as long as you change the batteries when they get low. Otherwise it will give you false reading.a. I store mine in a 7.0 calibration solution which you can buy on ebay cheap. Quote Link to comment Share on other sites More sharing options...
JamesHe Posted January 28, 2015 Report Share Posted January 28, 2015 Look at what he says at the 30 second mark. That is what's confusing me. "Keep it dry before recapping..." My pinpoint needs to be kept wet at all times. Bryce, for storage always keep in KCl solution. You can find all the answers regarding pH meter and probe here: http://www.all-about-ph.com/ 35ppt 1 Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted January 29, 2015 Report Share Posted January 29, 2015 I'll remember that if I'm storing it again. Right now I have it continuously monitoring my crs/tb tank. Quote Link to comment Share on other sites More sharing options...
JamesHe Posted January 29, 2015 Report Share Posted January 29, 2015 I'll remember that if I'm storing it again. Right now I have it continuously monitoring my crs/tb tank. You need to 1. clean 2. restore 3. calibrate every couple months. Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted January 29, 2015 Report Share Posted January 29, 2015 You'd think so, but I just checked the ph on some known drinking water, and it's still fine after a year. Quote Link to comment Share on other sites More sharing options...
ShrimpShack Posted February 1, 2015 Report Share Posted February 1, 2015 Have you calibrated your pH meter using the 4.1, 7 solution? How did that go? Quote Link to comment Share on other sites More sharing options...
JamesHe Posted February 1, 2015 Report Share Posted February 1, 2015 You'd think so, but I just checked the ph on some known drinking water, and it's still fine after a year. No, you need reference solutions ( for freshwater, 4.0/7.0 for saltwater 7.0/10.0) to check the reading. After 2 to 3 months of usage, it can easily have 0.5 reading errors. and if you didn't do restore, the reading would because slower and slower over time. If you have couple pH monitors, it would easy to show you different readings. Quote Link to comment Share on other sites More sharing options...
Jadenlea Posted February 1, 2015 Author Report Share Posted February 1, 2015 What I've learned : PH meters are a pain in the butt! Shrimpie 1 Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted February 1, 2015 Report Share Posted February 1, 2015 No, you need reference solutions ( for freshwater, 4.0/7.0 for saltwater 7.0/10.0) to check the reading. After 2 to 3 months of usage, it can easily have 0.5 reading errors. and if you didn't do restore, the reading would because slower and slower over time. If you have couple pH monitors, it would easy to show you different readings. Why would I need reference solutions? If the back of the drinking water labels ph, and my meter matches up, then why would I need to recalibrate? Quote Link to comment Share on other sites More sharing options...
miwu Posted February 1, 2015 Report Share Posted February 1, 2015 It may be fairly accurate in a small range while completely off in another. PH meters (at least the ones I've used in school) need to be calibrated at multiple points. Also, I'm not sure how confident I would be with water bottle labels lol. Quote Link to comment Share on other sites More sharing options...
JamesHe Posted February 1, 2015 Report Share Posted February 1, 2015 Why would I need reference solutions? If the back of the drinking water labels ph, and my meter matches up, then why would I need to recalibrate? In short, reference solution has buffering capability. It locks the pH in narrow range. drinking water's pH is not stable. it could swing big just by exposed to air (CO2). Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted February 1, 2015 Report Share Posted February 1, 2015 I'll look into that. Thanks James. Quote Link to comment Share on other sites More sharing options...
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