19
TROUBLESHOOTING
Evaluate your electrode performance based on the following.
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Noise
(Readings fluctuate up and down) could be due to:
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Clogged/Dirty Junction:
refer to the Cleaning Procedure
above.
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Loss of shielding
due to low electrolyte level (in refillable
electrodes only):
HI 7071
for single junction or
HI 7082
for
double junction electrodes.
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Dry Membrane/Junction:
soak in
HI 70300
storage solution for
at least one hour.
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Drifting:
soak the electrode tip in warm Hanna solution
HI 7082
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.
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Low Slope:
refer to the Cleaning Procedure above.
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No Slope:
check the electrode for cracks in glass stem or bulb and
replace the electrode.
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Slow Response/Excessive Drift:
soak the tip in Hanna
HI 7061
cleaning solution for 30 minutes, rinse thoroughly in distilled
water and then follow the Cleaning Procedure above.
CLEANING PROCEDURE
• General
Soak in Hanna
HI 7061
general cleaning solution
for approximately 1 hour.
Removal of films, dirt or deposits on the membrane/junction:
• Protein
Soak in Hanna
HI 7073
protein cleaning solution
for 15 minutes.
• Inorganic
Soak in Hanna
HI 7074
inorganic cleaning solution
for 15 minutes.
• Oil/grease
Rinse with Hanna
HI 7077
Oil & Fat cleaning
solution.
IMPORTANT:
After performing any of the cleaning procedures rinse
the electrode thoroughly with distilled water, drain and 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.