9
pH Measurement
•
Rinse the electrode thoroughly with distilled water.
•
Place the electrode into the sample solution, stir the electrode gently.
•
Record the measured value when the reading is stable.
Auto-Hold
PCE-PH 28L pocket pH meter contains an Auto-Hold function. If enabled, the meter will automatically sense a stable reading and lock the
measurements. The
icon appears on the display. If disabled, press the
Hold
key, the meter will immediately lock the displayed value.
Press the
Meas
key to resume measuring.
Electrode Care and Maintenance
•
For best results, please always keep the glass sensitive membrane wet.
•
Ensure that the electrode is thoroughly washed with distilled or deionized water after use.
•
If you do not use the meter for long periods, store the electrode into the 3M KCL solution.
Electrode Replacement
When the meter fails to calibrate or gives fluctuating readings for calibration standards, you need to replace the electrode.
1.
Twist the electrode collar counter clockwise, pull the old electrode away from the meter.
2.
Align the slot on the new electrode, gently push the electrode into the meter.
3.
Twist the electrode collar clockwise until it is tight. Installation is completed.
