pH meter is a useful machine or device used to measure the acidic and basic potentials of a solution. It is very essential for a biologist, or a chemist or an environmentalist or a home gardener to find out the alkalinity or acidity of a certain liquid. The perfect way to do this is to use a pH meter. It is a very essential tool to measure pH levels. pH meter is easy to use and gives accurate measurements. But before each use, it needs to be calibrated. Providing a simple guideline on how to calibrate and use a pH meter.
Using a pH Meter
Always keep the pH probe in a storage solution or pH-4 solution. If the probe you are using is not stored in ph-4 solution, then soak the probe in distilled water. This should be kept for at least 24 hours prior to testing.
Now set the meter in pH mode.
Rinse the probe of your meter in distilled water.
Take it out, shake it and then place it in a pH 7 solution for calibration.
Now make sure that you have kept the probe in the solution for at least 30 seconds. This will help the meter to get time to stabilize. Now adjust the meter. The reading should be pH 7
Now rinse the probe again.
Now place it into a pH 4 solution.
Adjust the meter so that it reads pH 4. This means that your meter has now been calibrated.
Again the probe needs to be rinsed. Shake off any excess liquid.
Your probe is now ready.
You can place this probe in your liquid that is to be tested.
Now allow the pH reading to settle. You get the pH reading of your sample.
After the measurement, store the ph probe in a pH 4 solution.
