YSI MultiLab IDS 4120 Operation Manual page 6

Storage
Subsequent
calibrations
During short
measuring breaks
Overnight or
longer
6
measurement to the next by taking the following measures:
– Shortly rinse the calibration and sample beakers with the solution the
beakers are to be filled with next.
– Between measurements, rinse the electrode with the solution that fol-
lows. Alternatively, you can also rinse the electrode with deionized
water and then carefully dab it dry.
 Immerse the electrode in the solution in a vertical or slightly tilted position.
Make sure the immersion depth is correct. The junction must be com-
pletely submersed in the solution. The junction is in the area of the bottom
end of the shaft (see figure). At the same time, the level of the reference
electrolyte in the electrode must be at least 2 cm above the level of the
solution.
Shaft
Glass membrane
 Provide approximately the same stirring conditions for measuring as for
calibrating.
Prevent contact of the pH membrane to the beaker bottom to
avoid scratches on the pH membrane.
The frequency of subsequent calibrations depends on the application. The
meters provide an option where you can enter a calibration interval. After the
calibration interval has expired, the meter will automatically remind you of the
due calibration.
3 Storage
With the refilling opening open, immerse the electrode in reference electro-
+
lyte (KCl 3 mol/l, Ag
electrode with the test sample or deionized water.
Prevent contact of the pH membrane to the beaker bottom to
avoid scratches on the pH membrane.
Put the clean electrode in the watering cap that is filled with reference elec-
trolyte (KCl 3 mol/l, Ag
Reference electrolyte
Junction
free). Prior to the next measurement, shortly rinse the
+
free) and close the refilling opening.
4120(W) / 4130(W)
(Example)
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