Bluelab pH Pen User Manual download pdf (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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Bluelab pH Pen User Manual Page 5

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