09
PHscan20
Enter
Rinse the electrode with distilled water,
ait for the measured value to stabilize, the
display shows electrode slope and “END”. The tester returns to the pH
measurement mode. Calibration is completed.
EXIT THE CALIBRATION:
During the calibration, if you want to exit calibration mode, press MEAS key.
The tester will immediately return to measurement mode.
— dip the electrode into the pH10.01
(or pH9.18) standard buffer solution.
— Press ENTER key to confirm. W
pH Measurement
Rinse the electrode thoroughly with distilled water,
ait for the to stabilize, record
1. press MEAS key to turn
on the tester.
2. Dip the electrode into the sample solution, stir the tester gently.
3. W reading the measured value on the display.
Auto-Hold Function
When the auto-hold function is enabled, the tester will automatically sense a
stable end-point measured value and freeze it, “HOLD” indicator will appear on
the display. Press HOLD key, the tester resumes measuring.
Manual Hold Function
1. During the measurement, press HOLD key,
, “HOLD” indicator will appear on the display.
2. Press key again to release the measured reading, you can continue to take
measurement.
Electrode Care and Maintenance
— For best results, please always keep the sensor’s glass bulb wet.
— Ensure that the sensor is thoroughly washed with distilled water after each
use.
the tester immediately freezes
currently displayed value
PHscan20
10
Hold
Meas
— If you do not use the tester for long periods, please store the sensor with
electrode storage solution. DO NOT use de-ionized or distilled water.
Electrode Replacement
When the tester fails to calibrate or gives fluctuating readings for calibration
standards, you need to replace the electrode module.
1. Twist the electrode collar counter clockwise, pull the old electrode module
away from the tester.
2. Align the slot on the new electrode module, gently push the module into the
tester.
3. Twist the electrode collar clockwise until it is tight.
Troubleshooting
Installation is completed.
Slot
— Electrode dried out.
Soak the electrode in tap water for 10 minutes.
— Measured value is out of range.
Check the electrode whether clogged, dirty or broken.
module
— Incorrect buffer used or contaminated buffer solution.
Use fresh pH buffer solutions for calibration.
— Electrode is broken.
Replace the electrode .module
LCD DISPLAY CAUSE
— Keypad is not working properly.
Replace the batteries.
