Citizen CBM-910 Type II Instruction Manual Page 85

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Chapter 6 ORP Measurement
F-72 73
6.7 ORP Measurement
This section describes the procedures of ORP measurement.
1. Wash the electrode with pure water (ion
exchange water), and wipe it off either with filter
paper or tissue paper.
2. Open the internal solution filler port of the
electrode.
During measurement, the filler port should be
kept open.
The filler port configuration depends on the
electrode type.
3. Immerse the electrode into the sample solution
deeper than 3 cm from the tip.
Immerse the electrode tip at least 3 cm into the
sample solution for an accurate measurement.
Refer to the instruction manual of the electrode for
more details.
4. Press the MEAS key, and tap the channel
setting and the measurement item in the MEAS
screen to set "CH1" and "ORP".
5. Tap to start measurement.
The measurement value is displayed, and the
HOLD indicator blinks until the reading
stabilizes.
To stop calibration tap while the HOLD
indicator blinks.
When the reading stabilizes, the value is held
and HOLD indicator lights up.
During instantaneous value measurement, or
when a measurement value is held, you can
store the measurement values by tapping on
the bottom of the screen.
6. After the measurement is completed, tap
to proceed to the next measurement.
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