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6.9
Notes about pH
1)
Never store pH electrode in pure water as it will damage the electrode. Always store the electrode
in 3M KCL soaking solution (AI1107).
2)
If you find any air bubble in the glass bulb of the pH sensor, simply shake the probe with force for
a few times to remove it. The existence of an air bubble in the glass bulb will significantly decrease
the stableness of measurement.
3)
pH electrode is technically a chemical battery. Every pH electrode will eventually die even if you
don’t use it at all. The typical service life of a pH electrode is 1-2 years depending on how you
use and maintain it. We recommend replacing your pH electrode after one year of use to ensure
the best result.
4)
Always keep the meter’s connector clean and dry, otherwise it may lead to an inaccurate
measurement. If contaminated, clean the connector with alcohol prep pads and blow-dry.
7
Conductivity Measurement
7.1
Preparation
Press to power on, connect the 2301T-S conductivity electrode (See Section 5 for connection
tutorial); the meter will automatically change to conductivity measurement mode.
7.2
Conductivity Calibration:
8.2.1 Short press to enter calibration mode,
cal
flickers on LCD, indicating the meter enters
calibration mode. Rinse off the electrode in pure water and remove excess water, then insert it into the
1413µS standard solution, make a quick stir and then hold it still. When the reading is stabilized and
stays on screen, short press again to finish calibration.
1413µS
will start flickering and then a
flickering
will show up, and the meter will return to measurement mode. shows up at the
lower left corner, indicating a successful conductivity calibration. If the measurement is not stable, you
can perform the calibration once again.
Note: Conductivity can only be calibrated under the mode of conductivity. If in other modes, please switch
back to conductivity before pressing .
