pH Electrode Protection Solution:Regularly replacing with new pH electrode protection solution can help the probe maintain optimal condition and extend the life of the tester
1413μS/cm Calibration Solution:It's wise to calibrate in the following situations: ①When you change a new TDS electrode ②When the electrode hasn't been used for a long time ③When you use the meter in a powerful solution ④When it's important to get a very exact tds ec measurement
Attentions:After replacing the new probe, please recalibrate the pH and EC