Hanna Instruments HI83325 Instruction Manual page 38

Periodic Maintenance
Inspect the electrode and the cable. The cable used for connection to the instrument must be intact and
there must be no points of broken insulation on the cable, connectors must be perfectly clean and dry.
If there are any scratches or cracks on the electrode stem or bulb, replace the electrode.
For refillable electrodes, refill the reference chamber with fresh electrolyte
KCl Electrolyte solution). Allow the electrode to stand upright for 1 hour.
Cleaning Procedure
Several cleaning solutions are available:
• General – Soak in Hanna
30 minutes.
• Protein –Soak in Hanna
• Inorganic – Soak in Hanna
• Oil and grease – Rinse with Hanna
After performing any of the cleaning procedures, rinse the electrode thoroughly with distilled water,
refill the reference chamber with fresh electrolyte (refillable electrodes only) and soak the electrode in
HI70300 or HI80300
Temperature Correlation for pH Sensitive Glass
Verify the temperature range by reading the limits on electrode's cap. The pH electrode's life is
temperature dependent. If constantly cycled between two temperatures, the life of the electrode is
drastically reduced.
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HI7061 or HI8061
HI7073 or HI8073 Protein cleaning solution for 15 minutes.
HI7074 Inorganic cleaning solution for 15 minutes.
HI7077 or
Storage solution for at least 1 hour before taking measurements.
(HI7082
General cleaning solution for approximately
HI8077 Oil and Fat cleaning solution.
or HI8082 3.5M