Bluelab pH Pen - Manual (Page 5)

4.0 Cleaning
To ensure accurate readings the probe needs to be rinsed in water before
replacing the storage cap and cleaned regularly using the following instructions.
Rinse probe tip under fresh water.
Fill small container with clean water.
Add a small amount of Bluelab pH Probe Cleaner or
mild detergent (dish washing liquid).
Gently stir the probe tip in the mixture.
Ensure that you do not ‘knock’ the pen on the side of
the container as this may cause damage to the glass
probe. Rinse well under fresh running water to remove
all traces of the detergent mixture.
If the probe requires removal of heavy contamination:
Gently brush around the glassware with a few drops
of Bluelab pH Probe Cleaner or mild detergent
(dishwashing liquid) and a soft toothbrush.
Rinse well under fresh running water to remove all
traces of the detergent mixture.
Calibration of the probe is required after every clean.
See the pH calibration in section 7.0. Place storage cap
back onto the probe.
Detergent
5.0 Battery replacement
The pH pen is powered with 1 x AAA alkaline battery. Do not use rechargeable
batteries. A low battery warning is indicated by a battery symbol appearing on
the screen. Only remove the battery cap when the batteries require changing.
Battery life is expected to be 350 hours.
To remove old battery
Undo battery cap fasteners. Remove battery cap and tip out the
old battery.
Check for corrosion
Flat batteries may leak and cause corrosion. Check battery
contacts and the battery for any sign of corrosion. Battery
contacts should be cleaned fi rst if corrosion is found before
proceeding to step 3.
Fit new battery
Insert the new batteries positive (+) end down into the body.
Ensure waterproof battery cap seal is clean
Seal will fail if any dirt is present.
Replace battery cap
Tighten fasteners on battery cap until there is no space left
between the cap and body.
This ensures the unit remains 100% waterproof.
Waterproof seal
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