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CLEANING PROCEDURE
General Soak in HI 7061 general cleaning solution for
approximately 30 minutes.
Removal of films, dirt or deposits on the membrane/junction:
-
Protein
Soak in HI 7073 protein cleaning solution for 15 min.
-
Inorganic
Soak in HI 7074 inorganic cleaning solution for
15 minutes.
-
Oil/grease
Rinse with HI 7077 Oil & Fat cleaning solution.
IMPORTANT: After performing any of the cleaning procedures rinse
the electrode thoroughly with distilled water, refill the reference
chamber with fresh electrolyte (not necessary for gel-filled electrodes)
and soak the electrode in HI 70300 storage solution for at least
1 hour before taking measurements.
TROUBLESHOOTING
Evaluate your electrode performance based on the following.
• Noise (Readings fluctuate up and down) could be due to:
– Clogged/Dirty Junction: Refer to the Cleaning Procedure
above.
– Loss of shielding due to low electrolyte level (in refillable
electrodes only): refill with fresh HI 7071 for single junction or
HI 7082 for double junction electrodes.
• Dry Membrane/Junction: soak in HI 70300 storage solution for
at least 1 hour.
• Drifting: soak the electrode tip in warm (approx. 50-60°C)
Hanna HI 7082 solution for one hour and rinse the tip with
distilled water. Refill with fresh HI 7071 for single junction
electrodes and HI 7082 for double junction electrodes (refillable
electrodes only).
• Low Slope: refer to the cleaning procedure above.
• No Slope: check the electrode for cracks in glass stem or bulb
and replace the electrode.
• Slow Response/Excessive Drift: soak the tip in HI 7061
solution for 30 minutes, rinse thoroughly in distilled water and
then follow the Cleaning Procedure above.
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