Digital pH value meter, pH tester, pH value meter with 4 sachets for calibration
PH stands for power of hydrogen, which is a measurement of the hydrogen ion concentration in the body. The total pH scale ranges from 1 to 14, with 7 considered to be neutral. A pH less than 7 is said to be acidic and solutions with a pH greater than 7 are basic or alkaline.
To use, take off the black cover & immerse into liquid, you should get a reading on the LCD screen.
1: Immerse the electrode in PH6.86 (under the temperature of 25°C ) standard buffer solution of phosphate, and gently shake the electrode.
2: Regulate the trimmer with a screwdriver until the buffer solution value corresponding to the measurement temperature is obtained.
3: Immerse the electrode in ph 4.01 or ph 9.18 the standard buffer solution of borax. After about one minute, until the buffer solution value corresponding to the measurement temperature is obtained.
Do not calibrate the instrument before using it for the first time.
If the instrument is not used for more than 4 weeks, the calibration must be carried out again.