Type 65-1 Combined Electrode
Usage:
This electrode consists of a sensitive glass electrode combined with a silver/silver chloride electrode. It can be used to measure pH value of an aqueous solution without other reference electrodes. Its measuring range: pH 0 to 14, suitable temperature: 5 to 60℃, pH value of cell zero-point: 7±0.3pH.
Operation and maintenance:
⑴ whenever a new electrode is used for the first time or used once again after laying for a long time, soak the glass bulb in distilled water for about 8 hrs.
⑵ when measuring, pull out the rubber stopper situated on the upper part of the electrode, take off the rubber cap, cover the electrode with a protective casing of polyethylene so as the small hole on the casing and the micro-hole of ceramic core on the glass tube are in alignment.
⑶Immerse the protective casing in distilled water wholly for cleaning before measurement. Both the electrode bulb and micro-hole should be immersed simultaneously in solution to be measured during measurement. When another solution will be measured, rinse the protective casing thoroughly with distilled water first to avoid impurity being brought into solution.
⑷ The internal filling solution of the reference electrode is a 3.3N solution of KCl and saturated with AgCl. This solution should be maintained over half a tube and may be filled up from the upper orifice, which must be covered with the rubber stopper when not in use.
⑸ when it is used together with a pH meter, the pH value of cell zero-point must be lain within the adjustable range of pH meter.
⑹ No contamination on the glass bulb, if there is some, wipe it clean by acetone, then soaked in distilled water for 8 hrs before using.
⑺ It cannot be used in non-aqueous solution and dehydrating agent.
⑻ The insulated part of plug should be kept clean and dry.
