2
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Preparation
Note
White crystal (KCl) can adhere to the internal solution filler port
or protective cap. However, it will not cause any performance
problem.
Wash away the white crystal with pure water.
For the first use or use after a long interval
1. Loosen the knurled nut, then remove the protective cap.
2. Open the internal solution filler port.
3. Remove the existing electrode internal solution with a
dropper.
4. Fill the electrode with new internal solution (model 300)
until the solution level gets close to the internal solution
filler port.
5. Wash the electrode tip well with pure water, then wipe it
with filter paper.
Protective cap
Knurled nut
②
Remove
①
Loosen
Up to here
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Measurement (calibration)
1. Open the internal solution filler port.
2. If necessary, fill the electrode with new internal solution
until the solution level gets close to the internal solution
filler port.
3. Wash the electrode with pure water and wipe it with filter
paper, prior to every immersion into standard/sample
solution.
4. When there are air bubbles inside the responsive glass
membrane, stir it lightly to remove bubbles.
5. Immerse the responsive glass membrane and liquid
junction in the sample completely.
Make sure that the surface of the internal solution inside
the electrode is higher than the surface of the sample
solution.
6. Stir the electrode lightly to remove bubbles.
Note
z
Be sure to keep the internal solution filler port open during
measurement. If it is clogged with the solution, accurate
measurement cannot be performed. Wipe the solution with
cloth.
z
For calibration/measurement on pH meter, refer to the
instruction manual of pH meter.
