PH METER the performance, in addition to the instrument itself outside structure, and good maintenance is inseparable, PH meter this kind of instrument and use environment often have to contact chemical drugs, therefore, reasonable maintenance more necessary.
(1) instrument input end (i.e. composite electrode jack) must maintain clean, electrode plug don't often dial the next, in order to prevent dust and high humidity immersion.
(2) composite electrode head very thin, therefore, not hard and collision, prevent electrode damage.
(3) composite electrode head do not contact dirt, such as the discovery of contamination available medical cotton graze electrode head, or with 0.1 mol/L dilute hydrochloric acid cleaning.
(4) composite electrode head crack or aging (long put above one year), should be exchange new electrode, or slow response, even cause big measurement error, the new electrode in before you use it you should in 3 mol/L potassium chloride solution soak 24 h.
(5) with buffer solution calibration instrument, to ensure the reliability of the buffer solution, because the buffer solution precision low, will lead to the result of the measurement error, buffer solution may make the preparation, preparation method is attached below.
