Bluelab Guardian Monitor - Manual (Page 5)

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5
2.0 IMPORTANT - Bluelab pH Probe care
The Bluelab pH Probe is the only part of the Bluelab Guardian Monitor that should
ever require replacing. pH probes DO NOT last forever. They age through normal use
and will eventually fail. The life time of a pH probe depends on the environment it is
used in and the way that it is treated. To receive a long life from your pH probe, please
ensure you follow the guide below.
pH probe holder
suction cup
pH probe
storage cap
pH probe tip
BNC connector
Glass tube inside
plastic barrel
Glass bulb
DO NOT let the pH probe tip dry. IF IT DRIES IT DIES!
DO NOT bend the probe; this will break its internal glass tube.
DO NOT knock the probe; this will break its internal glass tube or external glass bulb.
DO NOT plunge a cold pH probe into a hot liquid - sudden temperature changes can crack the
glass and permanently damage the probe.
DO NOT immerse in oils, proteins or suspended solids that will leave a coating on the glass bulb.
DO NOT ‘kink’ or bend the lead sharply.
DO NOT attempt to lengthen the lead on the pH probe.
DO NOT wet the BNC connector at the end of the lead.
Bluelab pH Probe
pH probes contain glass and are therefore FRAGILE. With good care, they will
give a long service life.
Always remove pH probe storage cap before use
1. Grip the top of the cap and gently twist the base one rotation
clockwise to loosen slightly.
2. Next slowly slide the cap off the pH probe. DO NOT completely
remove the base of the cap from the top of the cap.
3. Store the storage cap in a safe place.
Storing the pH probe
When storing the pH probe, the pH probe tip must be kept moist.
To prepare the pH probe for storage, add enough Bluelab pH Probe KCl Storage
Solution to the storage cap so the probe tip is covered. Then replace the cap
and store in a secure place. DO NOT use RO (Reverse Osmosis), Distilled or
De-ionized water. Pure water changes the chemistry in the reference, causing
the probe to die.
If the pH probe has been accidentally allowed to dry out;
The pH probe must be ‘hydrated’ for 24 hours in KCl storage solution (never use
RO, Distilled or De-ionized water). Following this; carry out a calibration to check if
the probe has already suffered permanent damage.
Removing pH probe
storage cap
Ensure probe tip is covered by
the KCl storage solution in cap