NAVI F-52, Instruction Manual

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Chapter 15 Maintenance and troubleshooting
15.1 Maintenance
F-52, 53, 54, 55 195
●
65XX-10C electrode maintenance
Refer to the electrode operation manuals for maintenance concerning other electrode models.
Long-term storage
1.
Remove the tip electrode from the combined electrode and put on the rubber
cap.
2.
Put on the electrode protective cap.
(Do not put water in the electrode protective cap and make sure it is dry.)
3.
Store both the tip electrode and the combined electrode in dry condition.
4.
To reuse the electrodes, start with the operations explained in the section enti-
tled “
●
Before using” above.
Daily maintenance
When an electrode has not been used for a long period of time, some of the sample may have
entered the standard solution (outer tube) or the standard solution may have become deterio-
rated. For this reason, perform the following operations from once a week to once a month to
replace the internal solution within the reference electrode (outer tube).
1.
Open the internal solution filler port by removing the rubber stopper, then turn
the electrode upside down and use a syringe to remove the standard solution.
2.
Use the syringe to fill the electrode with the specified standard solution.
The ideal amount of standard solution discharge is only a tiny bit from the liquid junction. If
the amount of liquid flowing out is extremely small, the electric potential of the reference
electrode will not stabilize and will be affected by the stirrer. In such cases, perform the fol-
lowing operations to make the standard solution seep out from the liquid junction.
Standard solution outflow operations
1.
Remove the protective tube from the combined electrode so that the rubber
cap is mounted on the tip-type ion electrode part.
2.
Remove the rubber stopper from the standard solution filler port on the top part
of the electrode.
3.
Stand the electrode vertically on a desk or other horizontal surface, with the
bottom of the electrode (the side with the rubber cap) facing down. Push the
electrode down two or three times, to make the standard solution seep out
through the liquid junction.