3
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 (or deionized water)
and wipe it with filter paper or tissue paper, prior to every
immersion into the standard or sample solution.
4. When there are air bubbles inside the responsive glass
membrane, stir the electrode lightly to remove bubbles.
5. Immerse the responsive glass membrane and liquid
junction in the sample solution completely.
Make sure that the surface of the internal solution inside
the electrode is higher than the surface of the sample
solution.
6. Rinse the electrode with the sample solution lightly to
remove bubbles. If bubbles remain on the electrode
surface, accurate measurement cannot be performed.
Note
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.
For calibration and measurement on pH meter, refer to the
instruction manual of pH meter.
In submergence measurement
Perform measurement with the internal solution filler
port closed.
Pour the internal solution as much as possible, and
close the internal solution filler port not to leave the
bubbles inside the electrode.
Avoid continuous use for more than 30 minutes.
Do not swing around the sensor, and do not pull the
connection with the cable. In addition, do not hold the
cable with the electrode and pH meter hanging. It may
cause breaking of wire.
