2 1
CLEANING PROCEDURE
General
Soak in Hanna
HI 7061
or
HI 8061
General Cleaning
Solution for approximately ½ hour.
Removal of films, dirt or deposits on the membrane/junction:
-
Protein
Soak in Hanna
HI 7073
or
HI 8073
Protein Cleaning
Solution for 15 minutes.
-
Inorganic
Soak in Hanna
HI 7074
or
HI 8074
Inorganic Clean-
ing Solution for 15 minutes.
-
Oil/grease
Rinse with Hanna
HI 7077
or
HI 8077
Oil and 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
or
HI 80300
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
or
HI 8071
for single
junction or
HI 7082
or
HI 8082
for double junction electrodes.
•
Dry Membrane/Junction:
Soak in
HI 70300
or
HI 80300
Storage Solution
for at least 1 hour.
•
Drifting:
Soak the electrode tip in warm (approx. 50-60°C)
Hanna
HI 7082
or
HI 8082
Solutions for one hour and rinse the
tip with distilled water. Refill with fresh
HI 7071
or
HI 8071
for
single junction electrodes and
HI 7082
or
HI 8082
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
or
HI 8061
Solutions for 30 minutes, rinse thoroughly in distilled
water and then follow the Cleaning Procedure above.
