Hanna Instruments HI 3220 - Manual (Page 59)

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Follow the Storage Procedure above.
pH CLEANING PROCEDURE
• General Soak in Hanna HI 7061 or HI 8061 General
Cleaning Solution for approximately ½ hour.
• Protein Soak in Hanna HI 7073 or HI 8073 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 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
calibrating.