Calibration method of sodium meter of Huake instrument

1. First, clean the electrode (PH electrode) system with distilled water, dry it with filter paper, and immerse it in standard buffer solution with pH value of 6. 86.

2. Secondly, when the electrode system is in balance with the solution temperature and the transmitter (or converter) indicates stability, measure the solution temperature, and find out the pH value of the solution at this temperature according to the "pH value-temperature comparison table of standard buffer solution".

3. Finally, adjust the zeroing (asymmetric) potentiometer of the instrument to make the instrument indicate the above pH value.