BREWFERM COBRA Manuel page 12

X. MAINTENANCE
•
Always keep the pH glass bulb wet by
using the storage bottle to protect and
store the electrode.
•
Always rinse the pH electrode in de-ion-
ised water or rinse solution (e.g. tap
water) before the next use.
•
Never touch or rub the glass bulb in or-
der to prolong the pH electrode's life.
•
Make sure the electrode is clean. Be-
tween measurements, rinse the elec-
trode with de-ionised water. If the
eletrode has been exposed to a solvent
immiscible with water, clean it with a
solvent miscible with water (e.g. etha-
nol or acetone) and rinse carefully with
water.
•
Store the electrode carefully.
XI. TROUBLESHOOTING
•
Power on but no display
1. Make sure you press the power key
more than 100 mS.
2. Check for whether the batteries are
in place, they make contact and that
the polarity is correct.
3. Replace the batteries and try again.
4. Remove the batteries for one minute
and then put them back in again.
•
Slow response
Clean the probe by immersing the elec-
trode in tap water for 10-15 minutes,
then rinse thoroughly with distilled wa-
ter or use a general purpose electrode
cleaner.
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