EUTECH INSTRUMENTS WATERPROOF CYBERSCAN PD 300 PHDISSOLVED OXYGEN METER, Инструкция по эксплуатации, Страница: 20 / 66

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5.1.3 Taking Measurements (pH)
Be sure to remove the electrode soaker bottle or
protective rubber cap on the electrode before taking
measurements.
To take readings:
1. Rinse the pH electrode with de-ionized or
distilled water before use to remove any
impurities adhering to the probe body. If the pH
electrode has dehydrated, soak it for 30 minutes
in Eutech Instruments electrode storage solution
or 2M – 4M KCl solution (sold separately).
2. Press ON to switch on meter.
3. Press the MODE key to select pH measurement mode. The MEAS annunciator appears
on the top center of the LCD. The ATC indicator appears in the lower right-hand corner to
indicator Automatic Temperature Compensation.
NOTE: For pH manual temperature compensation, you must disconnect the DO
electrode from the 6-pin connector. The ATC indicator will disappear from the display.
You also need to set a manual temperature compensation value. See page 15 (Figure
13) to set Manual Temperature Compensation.
4. Dip the probe into the sample. Since the DO electrode contains the temperature sensor,
make sure it is also immersed in your solution.
When dipping the probe into the sample, the sensor or the glass bulb of the electrode
must be completely immersed into the sample. Stir the probe gently in the sample to
create a homogeneous sample.
5. Allow time for the reading to stabilize. Note the reading on the display. Note the reading
on the display. If the Ready indicator is selected on, it will appear when the reading is
stable. See below for more information.
Figure 14 - Measurement mode