Thermo Fisher Scientific CyberScan PC 300 - Manual (Page 24)

Instruction Manual PC 300
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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
measurement.
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 conductivity cell
from the 6-pin connector. The ATC indicator will disappear from the display. You also need to
set a manual temperature compensation value. See Section 5.1.2 to set Manual Temperature
Compensation.
4. Dip the probe into the sample. Since the conductivity cell 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.
Figure 14 - Measurement mode