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5. pH Measurement
During measurement, you can hold the electrode in your hand or insert it in the
electrode holder for one-hand operation.
NOTE: Be sure to remove the protective rubber cap of the electrode before
measurement.
Measurement with automatic temperature compensation (ATC)
Automatic temperature compensation requires an OAKTON “All-in-One”
electrode or a separate temperature probe. The ATC indicator will appear on
the display to indicate ATC mode.
1. Rinse the electrode with deionized or distilled water. This will remove
impurities that have adhered to the electrode body. If the electrode has
dehydrated, soak it for 30 minutes in a 2M–4M KCl solution.
2. Turn the meter on. Make sure the meter is in the Measurement Mode
(MEAS indicator shows on the top center of the LCD). If the meter is not in
the measurement mode, press the CAL/MEAS
key until the MEAS indicator shows on the top
center of the display.
3. Dip the “All-in-One” electrode (or electrode
and temperature probe) into the sample. The
glass bulb of the electrode must be completely
immersed into the sample. Stir the electrode
gently to create a homogeneous sample.
See Figure K.
4. When the reading stabilizes, the READY
indicator will display. See Figure L.
The READY indicator appears on the top left
corner of the display when the reading is
stable within a range of ±0.01 pH (±0.8 mV <
400 mV; ±1.2 mV > 400 mV). The reading is
held until the variation of the reading exceeds
the specified range, and then the READY
display vanishes. Therefore, the READY
indicator assures you of stable readings.
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°C
pH
ATC
READY
MEAS
pH
L
Measurement with manual temperature compensation
These meters allow you to compensate for temperature effects even without a
temperature probe attached to the meter. However, you will need an external
thermometer to check the temperature of your sample.
1. Rinse the electrode with deionized or distilled water. This will remove
impurities that have adhered to the electrode body. If the electrode has
dehydrated, soak it for 30 minutes in a 2M–4M KCl solution.
2. Turn the meter on. Make sure the meter is in the Measurement Mode
(MEAS indicator shows on the top center of the LCD). If the meter is not in
the measurement mode, press the CAL/MEAS key until the MEAS indicator
shows on the top center of the display.
3. Dip the electrode into the sample. The glass bulb of the electrode must
be completely immersed into the sample. Stir the electrode gently to create
a homogeneous sample.
4. Check the temperature of your sample using an accurate thermometer.
5. Press the mode key until the TEMP
indicator appears at the bottom of the
display.
7. Press the CAL/MEAS key. The CAL
indicator appears at the top of the display.
See Figure M.
8. Press the
▲
or
▼
key to adjust the
temperature on the lower display.
Scroll in the temperature value noted in
step 4.
9. Once you have selected the correct
temperature, press the CON key. A
confirming indicator (CON) flashes on the
display for one second, then disappears.
See Figure N.
10. When the reading stabilizes, the READY indicator will display.
The READY indicator appears on the top left corner of the display when the
reading is stable within a range of ±0.01 pH (±0.8 mV < 400 mV; ±1.2 mV > 400
mV). The reading is held until the variation of the reading exceeds the specified
range, and then the READY display vanishes. Therefore, the READY indicator
assures you of stable readings.
°C
Temp
pH
CAL
°C
pH
CON
CAL
Temp
N
M
K
Summary of Contents for pH 10 Series
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