PHscan20S/F
Measurements
pH Measurement
1.
Rinse the electrode with deionized water. Place the electrode into the sample solution and stir gently. Note that the end of the electrode
must be completely immersed into the solution.
2.
Wait for the measurement to stabilize and record the reading.
•
During the measurement, never wipe the pH-sensitive glass membrane as this will cause static interference, blot dry with a lint-free tissue
to remove waterdrops on electrode.
•
If the display shows
indicating the measurement exceeds the range, remove the tester from the sample immediately.
Temperature Measurement
1.
Press the
Enter
key, the tester shows the temperature readings.
2.
Press the key again to return to the pH measurement.
Hold Function
This function lets you lock the pH reading for viewing and recording.
1.
Press the
Hold
key, the tester locks the measurement, the
icon appears on the display.
2.
Press the key again to resume measurement.
Electrode Maintenance and Replacement
Cleaning the Electrode
•
Since pH electrode is susceptible to contamination, thoroughly clean with deionized water as necessary after each use.
•
If your samples contain the oil or grease, soak the electrode in mild detergent or electrode cleaning solution for at least 15 minutes.
•
If you do not use the tester for long periods, store the electrode in 3M KCl solution or electrode storage solution.
DO NOT store the electrode in distilled or deionized water, which will deplete the hydration layer of the pH-sensitive glass membrane and
render the electrode useless.
Replacing the Electrode
If the tester fails to calibrate or gives fluctuating readings, the electrode needs to be replaced.
1.
Twist the electrode collar counter clockwise, pull the electrode away from the tester.
2.
Align the slot on the new electrode, gently push the electrode into the tester.
3.
Twist the electrode collar clockwise until tight.