Battery are not included
Correction with standard buffers:
1. Pour appropriate amount of 6.86, 4.01, 9.18 (temperature at 25℃) standard buffer solution into different clean beakers.
2. For accurate calibration, each buffer is divided into two beakers, one beaker is used to rinse the electrode, and the other is used to calibrate, so that the degree of contamination of the standard buffer solution can be minimized.
3. Tap ON/OFF to power on.
4. Put the instrument into the standard buffer, and gently shake, when the value is stable, press the CAL key, the instrument enters the automatic calibration state, the value will keep flashing, until the flashing stops and the value of the calibrator is consistent, complete the correction.
Correction with purified water (PH 7) :
1, in order to accurately calibrate, use two beakers, one beaker is used to rinse the electrode, the other is used to calibrate, in order to reduce contamination.
2. Tap ON/OFF to power on.
3, calibration, need to put the instrument in pure water, press the CAL key, display 6.86 in the flashing, the instrument enters the automatic calibration state, the value will keep flashing until the flashing stops, the display value is 6.86, complete the calibration.
Note: Calibration water temperature is recommended at 25 degrees Celsius
The calibration liquid should use distilled water or pure water (PH 7), not tap water, tap water quality is complex and PH is unstable, which cannot guarantee the correctness of calibration
