Calibration pH Steps
1. Before calibration, add the pH4.00/pH6.86/pH9.18 buffer powder into beaker with 250ml (under the temperature of 25℃) of distilled water, then stir until the powder has completely dissolved.
2. Press the ON/OFF button to turn on.
3. Press the TEMP / CAL button, adjust to pH mode.
4. Place the electrode in the pH pH4.00/pH6.86/pH9.18standard solution. 5. Wait for the readings to stabilize(usually 5~10 Seconds).
6. Press and hold the TEMP/CAL button for 6 seconds, then you can see corresponding value flashing 3 times which means calibration of pH is completed.
Package Includes
1 x pH Meter
1 x Carrying case
4 x pH buffer powder
1 x Users manual
Notes
Clean the electrode with distilled water Every time before and after use, gently wipe it with a clean, soft cloth when youre done before capping it again.
Be sure to add water according to the required ratio, otherwise it will affect the accuracy of the calibration and increase the error.