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8.2 Fill the probe
Add electrolyte filling solution to the probe regularly to make sure that the electrolyte flows from the
probe to the sample. Refer to
Figure
4. Make sure to use the correct filling solution (3 M KCl).
Note: If the dispensing tip becomes clogged, remove the dispensing tip and soak the tip in warm water. Then, fully
dry and assemble the tip again.
Figure 4 Fill the probe
8.3 Replace the filling solution
If the filling solution becomes contaminated, replace the filling solution.
1. Tilt the probe and open the filling hole.
2. Use a plastic transfer pipet to remove the contaminated solution from the filling hole. Discard the
solution.
3. Rinse the inner probe three times with deionized water.
4. Rinse the inner probe three times with new filling solution.
5. Fill the probe with new filling solution. Refer to
Fill the probe
on page 12.
8.4 Soak procedure for dry probes
If the glass bulb becomes dry, complete the steps that follow to hydrate the probe.
1. Soak the probe tip in a warm pH 4 buffer solution for 2 hours.
2. Rinse the probe with deionized water. Blot dry with a lint-free cloth.
3. Calibrate the probe.
12 English
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