![]() ![]() There are 5 ways that you can troubleshoot your pH meter system is you encounter pH calibration problems:įirst, check the age of your probes or electrodes. How to troubleshoot and reset your pH meter?īut there could be moments where despite calibration, your pH meter will not read the accurate pH measurement in your buffer or your actual solutions. Doing calibration ensures that your pH meter always get accurate results in measuring pH level of the solutions you are examining. Frequent calibration of your pH meter is recommended especially when it measures heavily contaminated, low-ion, strongly acidic, and high temperature solutions. If you are handling two or more solutions, always remember to rinse your electrode with distilled water before measuring for your next solution.Ĭalibrating your pH meter is important. ![]() Step 3, you will now be able to measure the pH of the substance or solution that you want to examine. For each process, you will have to repeat step 1 before proceeding to test the electrode for another buffer solution. Otherwise, you will need to edit the entry in your instrument to correct it. The pH meter should be able to read the assigned pH level of each of your buffer solution. Step 2, you test the electrode by submerging it in two buffer solutions of different pH levels, usually in the range of 4 to 7, or 10. Step 1, you clean the glass electrode with distilled water and a tissue to ensure that no particle from any acidic or alkaline solution from previous procedures is attached to the surface of the electrode and influence the measurements. There’s your solution to measure, your glass electrode to measure the pH level of your solution, and the measurement that you get.īut calibrating a pH meter can be done in 4 steps. Using a pH meter is pretty straightforward. Now let’s talk about how a pH meter is calibrated to get accurate results. The ions which attached to the surface of the glass electrode are what allow the determination of pH levels.īut don’t be too confused, all of those happened to measure pH levels: whether a solution is acidic or alkaline. Some of the metal ions from the glass electrode move into the solution. This is where the hydrogen ions in a solution move toward the surface of the glass electrode and replace some metal ions. Your pH meter is able to measure because of its two parts: first, the meter itself which is like a moving-coil or digital meter, and your probes (electrodes) which have a silver-based electrical wire and are put in a solution to measure pH level through a phenomenon called ion-swapping process. It measures voltage (electrical potential) of an acidic solution and compares it to the voltage of another solution where the difference in its voltage (potential difference) between the two allows the determination of the difference in pH levels. Because of this, pH meter works like a voltmeter: ![]() Meaning, it’s like a battery that can produce voltage. A basic understanding of pH level is that when you detect pH levels of less than 7, the solution is identified as acidic while those pH levels higher than 7 are alkaline.Īn acidic solution has far more positively charged hydrogen ions in it than an alkaline one, so it has greater potential to produce an electric current in a certain situation. It is often used to measure acidity in soil, water, winery, also even in manufacturing, healthcare, and clinical applications that require pH chemistry. A pH meter is a device you probably will first use, have used or been using for a really long time already but its purpose is basically to measure the changes in the activity of hydrogen ions in a solution, particularly its concentration levels. In this article, the goal is for you to learn the warning signs your pH meter is imploding and find out the 7 variables that will help you replace it with something that actually might last forever. Storage beyond 3 years may be possible if sensor's response time, slope, and asymmetry potential are within the user's acceptable limits. Even with proper care and maintenance, most pH electrodes usually last just 1-3 years. ![]()
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