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Remove the protective cap, rinse the pH electrode glass bulb with pure water (distilled water)
and wipe clean. (Glass bulb is fragile, be careful not to scratch it.)
Press the On/Off button to turn on the meter.
Dip the electrode about 2 to 3 cm into the test solution (at least 20 ml). Stir several seconds,
then stop and wait until the reading stabilizes.
Clean the electrode with pure water (distilled water) after measurement. Press the Mode button
to enter into pH mode.
While measuring, you can press and hold the Mode button to freeze the reading. Press and
hold the Mode button again to release measurement.
Press and hold the On/Off button to turn off the meter.
Remove the protective cap, rinse the conductivity electrode with pure water (distilled water) and
wipe clean.
Press the On/Off button to turn on the meter. Press the Mode button to switch to conductivity
mode.
Dip the electrode about 2 to 3 cm into the test solution (at least 20 ml). Wait until the reading
stabilizes.
Clean the electrode with pure water (distilled water) after each measurement.
Press the On/Off button to turn on the meter, and then press the Mode button to enter into pH
mode, dip the electrode into pH 7.0 buffer.
Press the CAL button to enter into calibration mode, the "CAL 7.00" will be shown, "CAL" is
blinking. The meter will determine if the signal is stable automatically, it will take a few seconds,
then the meter displays "CAL 4.01".
When the display reads "CAL 4.01", "CAL" is blinking, it indicates pH 7.00 calibration has been
finished. Rinse the electrode with pure water (distilled water) and dip it into pH 4.01 buffer.
The meter will determine if the signal is stable automatically; it will take a few seconds, then the
meter displays "CAL 10.01". If the number, such as "4.01" is blinking, it indicates the calibration
point can't pass. You may need to check if the buffer is right.
When the display reads "CAL 10.01", it indicates pH 4.01 calibration has been finished. Rinse
the electrode with pure water (distilled water) and dip it into pH 10.01 buffer.
The "CAL" will disappear after finishing 3-point calibration and go back to measurement mode.
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