How to Use a pH Meter Acidity Meter to Measure pH Value
A pH meter is a common analytical instrument widely used in fields such as agriculture, environmental protection, and industry. Let's learn together how to use a pH meter to measure pH value and the precautions when using it.
1. Method for measuring pH with pH meter and acidity meter:
(1) Take off the pen cap
(2) Press the on/off key, and the machine will display operation
(3) Place the pH meter into the liquid to be tested
(4) Gently shake the pH meter to ensure that the bubbles inside escape and come into full contact with the solution, without colliding with the cup wall
(5) The pH meter will immediately display the value. Place the pen in the liquid to be tested and wait for the value to stabilize. Within 30 seconds, the correct value will be displayed. (Note: It is normal for the pH meter value to fluctuate or be unstable.)
(6) Press the hold button to lock the value, which can be recorded and read outside the test solution. Continue to press the hold button to unlock
(7) Press the on/off key to turn off the pH meter
(8) Gently shake off excess water on the pH meter test pen, rinse with distilled water or deionized water, cover the pen cap to measure temperature. In test mode, the temperature value and pH value are displayed synchronously on the LCD panel, but not in calibration mode. The default value is Celsius temperature.
2. Precautions for pH meter and acidity meter:
(1) Please avoid high temperatures and direct light exposure
(2) Do not touch the sensor. If touched, rinse with a buffer solution with a pH of 7
(3) After each use, please cover the pen cap
(4) Do not test for too long in high-temperature liquids
(5) After use in solutions with high TDS values, please rinse the sensor
(6) When measuring solutions with significantly different pH ranges, it is necessary to rinse them in a buffer solution with a pH of 7
(7) To optimize performance, use the best measurement accuracy at least once a month
(8) Although unnecessary, calibrating the pH pen before each use would be more accurate
(9) Rinse with pH 7 buffer solution after each use
(10) When using, be sure to shake out the bubbles inside
(11) If there are scratches on the sensor, it needs to be replaced immediately
(12) If the reading is slow or the response is sluggish, the acidity meter battery or sensor needs to be replaced. If the pH pen is continuously used and calibrated, its performance will be affected. If the pH pen operates in a suitable environment, press the temp/cal button. When cal flashes, press both the temp/cal and hold buttons for 2 seconds to restart calibration, and then recalibrate.
