Apera Instruments SX736, Руководство пользователя

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6
pH Measurement
Short press to turn on the meter. Connect 201T-S pH electrode to the meter (See Section 5 for
connection tutorial). The meter will automatically enter pH measurement mode.
6.1
pH Electrode
The meter comes with the 201T-S 3-in-1 combination electrode with a built-in temperature sensor, which
enables automatic temperature compensation. This electrode is only suitable for general water
solutions’ pH testing. Please refer to Section 6.5 for ideal pH electrodes to use for other applications. A
3M KCL storage bottle comes with the electrode, which is for storing the electrode when not in use to
keep the sensitivity of the probe.
6.1.1 Technical Specifications of the 201T-F pH Electrode
Measurement Range: 0 – 14 pH, 0 – 80°C (32 – 176°F); Junction: Single Ceramic
Reference Electrode: Ag/AgCl Connector: 8-pin
Size: ø12*160 mm; Cable length: 1 meter
Temperature unit: 30K Thermistor
6.1.2 Use the Electrode
Screw off the KCL storage bottle and put it aside (do not dump or spill the KCL solution). Rinse the
electrode with distilled or deionized water. Shake off excess water or blot-dry with clean tissue or kimwipe.
Stir the electrode for a few seconds after it’s dipped into the test solution and then hold it still. Wait for the
reading to get fully stabilized ( appears and stays) and then take the measurement. When the test
is finished, place the electrode in the storage bottle and tighten the cap to keep the sensitivity of the pH
sensor.
6.2
pH Calibration
6.2.1 After powering on the meter, short press to enter calibration mode,
c1
flickers on LCD,
indicating the meter enters the first point calibration.
6.2.2 Rinse off the pH electrode in pure water and remove excess water, then insert it into the pH 7.00
buffer solution, make a quick stir and then hold it still. When the reading is stabilized and stays on
screen, short press again to finish the 1
st
point calibration.
“7.00 pH”
will start flickering and a
flickering
c2
will show up, indicating the 1 st point calibration has been finished and the meter is entering
the 2
nd
point calibration.