how accurate are the distinctions of this tester? i need to calibrate to 10.5-10 .75 ph
1376496
if you had a way to check calibrations at that range it would work for a while. A more resistant coating is formed above pH 10.5.
748988
Any. All ph meter should be calibrated once a while with a solution like this. You will find helpful to use the one suits best for your measures. Lets say you have to measure ph levels arround 5. So you get the 5 calibratiom solution. Or you need to measure arround 11, then you get the 11 calibration solution. Or like me, for marine aquarium, that o need to be as acurate around 8, then I use this product. Some meters will require two calibration Solutions, check that too.
1244505
This meter's pH scale doesn't vary much above and below 7.0. Most people have a liquid available at the store they can use to do a quick check, distilled water, which under ideal conditions should have a pH of 7. If the scale is off by even a factor of .5, it could really hurt your plants.Some basic chemistry calculations: Kw = [H+][OH-] = 1x10^-14 at 25°Cfor pure water [H+] = [OH-] = 1x10-7Acidic Solution: [H+] > 1x10-7pH = log10[H+]Basic Solution: [H+] < 1x10-7When calculating pH, remember that [] refers to molarity, M. One mole is Avogadro's number (6.02x10^23) molecules of a substance. This meter's pH scale doesn't vary much above and below 7.0. Most people have a liquid available at the store they can use to do a quick check, distilled water, which under ideal conditions should have a pH of 7. If the scale is off by even a factor of .5, it could really hurt your plants.Some basic chemistry calculations: Kw = [H+][OH-] = 1x10^-14 at 25°Cfor pure water [H+] = [OH-] = 1x10-7Acidic Solution: [H+] > 1x10-7pH = log10[H+]Basic Solution: [H+] < 1x10-7When calculating pH, remember that [] refers to molarity, M. One mole is... » Read More This meter's pH scale doesn't vary much above and below 7.0. Most people have a liquid available at the store they can use to do a quick check, distilled water, which under ideal conditions should have a pH of 7. If the scale is off by even a factor of .5, it could really hurt your plants.Some basic chemistry calculations: Kw = [H+][OH-] = 1x10^-14 at 25°Cfor pure water [H+] = [OH-] = 1x10-7Acidic Solution: [H+] > 1x10-7pH = log10[H+]Basic Solution: [H+] < 1x10-7When calculating pH, remember that [] refers to molarity, M. One mole is Avogadro's number (6.02x10^23) molecules of a substance. « Show Less
1160630
I never calibrated and just started using it. I took several packages to the post office and everything checked out perfectly. They explain how to calibrate it in the manual.
791354
We use this, as needed, along w/ chlorine and PH Rise (alkaline), as needed, and that's it. It might depend on where you live. We live in Ohio, as opposed to someone residing in Florida. I'm assuming that you use "test strips" 1x or 2x a week. This will give you the most accurate reading. If you're keeping your chlorine level relatively high along with the alkaline in balance and the PhosFree (as needed), you shouldn't need anything else. We don't. Hope this answers your questions! PS: My brother-in-law is a chemist, and he recommended that we use the PhosFree. It gives the pool a nice, clear, shinny look! It also helps the chlorine last longer! We use this, as needed, along w/ chlorine and PH Rise (alkaline), as needed, and that's it. It might depend on where you live. We live in Ohio, as opposed to someone residing in Florida. I'm assuming that you use "test strips" 1x or 2x a week. This will give you the most accurate reading. If you're keeping your chlorine level relatively high along with the alkaline in balance and the PhosFree (as needed), you shouldn't need anything else. We don't. Hope this answers your questions! PS: My brother-in-law is a chemist, and he recommended that we use the PhosFree. It gives the pool a... » Read More We use this, as needed, along w/ chlorine and PH Rise (alkaline), as needed, and that's it. It might depend on where you live. We live in Ohio, as opposed to someone residing in Florida. I'm assuming that you use "test strips" 1x or 2x a week. This will give you the most accurate reading. If you're keeping your chlorine level relatively high along with the alkaline in balance and the PhosFree (as needed), you shouldn't need anything else. We don't. Hope this answers your questions! PS: My brother-in-law is a chemist, and he recommended that we use the PhosFree. It gives the pool a nice, clear, shinny look! It also helps the chlorine last longer! « Show Less
1138042
Haven't used for home canning but I don't see why it wouldn't work. You have to be careful not to dip the tip too far into liquid (past the black cover) because the device is not waterproof. You also need to buy some calibration fluid to get accurate results. I bought ph4 and ph7 calibration packets to calibrate. They cost about a dollar a piece. This is not a bad tester considering the price. I have been using mine for a saltwater aquarium for a few months and it has worked well.
501133
calibration solution is about 1oz and storage is very little I made up the calibration and stored it in the refrigerator for about a month then it became unstable and i got rid of it as for storage solution it was maybe 10cc and I have been using filtered water to store it in seems to be working very well...Good Luck
1048509
since I had not done the acidic check, I do not know why it tested at 6.0. You might want to check with the company. Sorry.
122376
As Mark said NO, it is fixed at C. However, I only use the temperature readings to make sure my calibration solution and my rinsing solution are at the same temp. Speeds up calibration. You have to press the C button to get the reading and as soon as you let go it goes back to pH. My cell phone has a C to F conversion when necessary.
5096
hey. um i would imagine so because its acidic. but i would not know how much more..but what you can do is use the test strips to test the acidity and just add drops until you get the ideal ph. :) hope this helps
809884
Hi Mike, pH Dips have been designed to indicate whole number values for pH and you should easily be able to estimate 0.5 or half units as colors on the test strip may fall in between two whole numbers. I hope this helps. Thank you for your purchase.
124807
I routinely measure 0.04 grams, works for me but I have no way to compare. The calibration seems right on.
1378012
I haven't done any calibration, but I've noticed that it doesn't show boiling water temperature correctly (it's about 2 degrees Celsius/3,5 Fahrenheit lower). Maybe it's because it was not a distilled water? To be honest I also don't know how it can be calibrated (if at all). So far I had no problems with this little inaccuracy either.
346322
To calibrate, use distilled water. You set the device to zero and thats all. You should do this once every three / four months.
598125
Guy has the best answer so far. Use a solution that is closest to the range you expect to be measuring on a daily or regular basis.The factory has calibrated it a 442 ppm.John
180742
You can purchase some calibration solution at almost any gardening/hydroponics shop. The solution is a perfect 4.0. You put a little in a cup (about an inch) and place the tester in there, in the on position. If you don't read 4.0, you can turn that little screw in the back until you do. Thats it. Calibrated.
891535
There is a certain amount of liability I would take by answering if your machine is accurate. I would suggest you do a charcoal test next to it to compare readings. Your first test that come back over 4.0 always makes you second guess any machine.