Electrode Conditioning & Maintenance - Hanna Instruments HI84529 Instruction Manual

18. ELECTRODE CONDITIONING & MAINTENANCE
Storage Procedure
To assure a quick response time, the glass bulb should be kept moist and not allowed to dry out.
Replace the solution in the protective cap with a few drops of
The HI5315
using. Follow the ELECTRODE PREPARATION procedure before taking measurements.
Note: Never store the pH electrode in distilled or deionized water.
Periodic Maintenance
Inspect the electrodes and the cables. The cable used for connection to the instrument must be intact
and there must be no points of broken insulation on the cable or cracks on the electrode stem or
bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present, replace the
electrode. Rinse off any salt deposits with distilled/deionized water.
pH Cleaning Procedure
• General: Soak in Hanna Instruments
½ hour.
• Milk deposits: Soak in Hanna Instruments
approximately ½ hour (pH half cell only).
• Protein: Soak in Hanna Instruments
Important: After performing any of the cleaning procedures, rinse the electrode thoroughly with
distilled or deionized water and soak the electrode in HI70300 or HI80300 Storage solution for
at least 1 hour before taking measurements.
Reference Electrode Cleaning
• Drain the old fill solution, rinse with a few drops of
solution.
• Do not use an electrode if crystallized salts are visible inside the electrode. Drain electrode,
disassemble and rinse internal body with deionized water. Reassemble and refill with fresh fill
solution.
• The internal chamber of this electrode is gell filled. If the electrode has been left dry for long periods
of time the gel may be dehydrated and stable measurements may not be obtainable. Disassemble
electrode and soak internal assembly in
solution. Warming the solution slightly (50 °C) before soaking will hasten this process. Permit the
electrode to cool completely while immersed in this solution.
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reference may be stored with its black cap and fill hole covered. Rinse and refill before
HI7061
HI70300
or HI8061 General cleaning solution for approximately
HI70640 Cleaning solution for milk deposits for
HI7073 or HI8073 Protein cleaning solution for 15 minutes.
HI7072 solution, drain, then refill with
HI7072 fill solution. Verify the ceramic is wetted by the fill
or HI80300 Storage solution.
HI7072