Troubleshooting pH Meter Calibration Problems
Measuring pH is important in many industries. A pH Meter plays an important role in the water treatment process and much more. Also, the professionals in the food processing use this device often. Well, you need another article to explain the use of pH Meters in various industries. Anyway, I am writing this article to help you in troubleshooting calibrating issues with your pH Meter. So, I will not explain its function and use in various industries.
Same as every other electronic/digital device, a pH Meter also fails in many ways. That’s a common factor of all the electronic/digital devices. Calibrating the meter regularly is a necessity for obtaining accurate readings. It’s a part of the maintaining process.
Well, the frequency of calibration depends on for what you are using the meter. Depending on the application, calibrate the meter daily, weekly, or monthly. OK, your meter can give you some trouble when calibrating. So, if you are experiencing any calibrating difficulties, follow this troubleshooting guide.
* Determining the age of the probe: A pH Meter probe usually serves you for 12-18 months. Well, if you use it every day, it can die earlier. How can you determine the age of the probe? Have you heard about the “Lot Code?” It’s a code with two numbers and a letter: where the letter indicates the month and the number indicates the manufactured year (A=January, B=February….“I” not sued, and J=September.) For example 13C*: The probe was manufactured on March 13.
* Routine maintenance: Do you want to eliminate pH Meter calibration problems? Give a detail clean to the electrode weekly or monthly. Anyway, read the meter and electrode manuals. Failing to clean the probe would make it become unresponsive. Soak in vinegar to remove hard deposits on the probe (field electrodes.)
* Check for physical damage: Dropping the pH Meter on the floor is a common accident. A damaged probe would become unresponsive or gives you inaccurate readings. Check for damaged/broken glass bulb. Replace the damaged probe out of choice.
* Never let the pH Meter probe to dry: After every use, store the probe submerged in the buffer solution, it in a moist environment. A dried out probe needs to be replaced.
* pH buffers for calibration: Never re-use the calibrating buffer solution. When you use the buffer for calibration, it might get contaminated with residues. The unwanted side effects of using re-use buffer: 1) Slow responding pH Meter. 2) You will never be able to calibrate the meter.
Also, make sure the buffer you are using is not our of date. Don’t keep the buffer bottles open. Begin calibration with pH 7 buffer.
* Can you reset the pH Meter to factory settings?: It’s the best thing you can do to remove any calibration error warnings. The user manual will explain the factory resetting. Anyway, not all the meters have this function.
* Probe response time: The electrode should respond within 60 seconds (no longer.) If your electrode doesn’t respond within 60 seconds, it’s safe to assume that the electrode is dirty or old. Old electrodes tend to have high response times, which means it’s the time to replace.
The pH Meter is a sensitive instrument, so maintain it well. Anyway, when the time is right; it will stop serving you. So, buying a new meter is the only option you have.