Nova-Tech pH 110 - Manual (Page 61)

Instruction Manual CyberScan pH 11 / 110
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11 ELECTRODE CARE
11.1 Electrode Maintenance
pH electrodes are susceptible to dirt and contamination and need to be cleaned
regularly depending on the extent and condition of use.
11.1.1 Storage
The best results, always keep the pH bulb wet, preferably in electrode storage
solution or pH 4 buffers with 1/100 part of saturated KCl. Other pH buffers or tap
water are also acceptable storage media, but avoid storage in de-ionised water. The
protective electrode storage bottle or rubber cap filled with the buffer solution
provides ideal storage for long periods.
11.1.2 After Use
After measurement is complete, follow the sequence elaborated below for storage.
1. Wash the electrode and reference junction in deionised water.
2. Close the refilling hole by returning its rubber sleeve or stopper cap
(Necessary for only refillable electrodes).
3. Store the electrode as mentioned above (Storage section 11.1.1), or as
recommended by the manufacturer.
11.1.3 Electrolyte Replacement (for refillable electrodes only)
The reference electrolyte needs to be refilled when the electrode has been used for
an extended period, or when the internal electrolyte has dried up. To accomplish this,
follow the procedure detailed below.
1. Remove the protective rubber cap or sleeve
2. Remove the protective rubber sleeve to expose the filling port of the
electrode. Remove the old reference electrolyte with a syringe and a flexible
tube.
3. Fill the new reference electrolyte. Add in fresh electrolyte till the level of
refilling port. The reference electrolyte depends on your electrode. Use the
solution type recommended for your electrode. Replace the rubber sleeve.
4. Reuse the electrode. Rinse the liquid junction with deionised water and tap
dry.
NOTE: If these steps fail to restore normal electrode response, you may attempt to
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