Bluelab pH Pen - Manual (Page 6)

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6
6.0 Hydration
Hydrate the pH pen tip in Bluelab pH Probe KCl Storage Solution before fi rst
use and after cleaning to improve the reading response speed.
Never use RO, Deionized or Distilled water.
Pure water changes the ions, causing the probe to die.
Remove the storage cap.
Place the pH pen upright in a small plastic container.
Add enough Bluelab pH Probe KCl Storage Solution to
submerge the probe tip.
Leave to soak for at least 24 hours.
After hydration, always calibrate the pH pen to ensure
accuracy. See section 7.0.
1
2
3
7.0 Calibration
pH calibration is required before fi rst use to ensure that the fi rst reading is
accurate. Calibration is also required when:
• The check mark/tick has disappeared from the LCD screen (30 days after last calibration)
• The reading is different from what you expected
• After cleaning and hydration
• After changing the batteries
pH 7.0 and pH 4.0 solutions are required for calibration.
You may also calibrate using pH 7.0 and pH 10.0 solutions if your readings will
normally be higher than 7.0 pH.
Excluding fi rst use, YOU MUST CLEAN the probe before
calibrating. See section 4.0.
Hydrate the probe before fi rst use and after cleaning, see
section 6.0
After hydration, rinse probe in fresh water and place in pH
7.0 solution.
Wait for the reading to stabilize.
Press the cal button until CAL is displayed.
Release button. When CAL 7 is displayed, 1 point calibration
is complete.
Rinse probe in fresh water and place it in either pH 4.0
or pH 10.0 solution (use pH 10.0 solution if you expect to
measure above 7.0 pH).
Wait for reading to stabilize.
Press the cal button until CAL 4 or CAL 10 is displayed
CAL 4 or CAL 10 should be displayed (depending on what
solution you are calibrating in). The check mark/tick is
displayed when a 2 point (or 3) calibration is completed.
NOTE: For a three point calibration repeat the steps using
pH 7.0, pH 4.0 then pH 10.0 solution.
Hold until
Hold until
1
2
3
4
5
pH 4.0
or
pH 10.0
KCl
Storage
Solution
pH 7.0