21
ELECTRODE MAINTENANCE
ELECTRODE MAINTENANCE
PREPARATION
• Remove the protective cap. Do not be alarmed if any salt deposits are present. Rinse with water.
• Shake the electrode down as you would do with a clinical thermometer to eliminate any air
bubbles inside the glass tip.
• Remove the fill hole cover to ensure the reference junctions are flowing. Set aside for storage.
• Top up the electrolyte filling solution using
HI7071
3.5M KCl with AgCl reference electrolyte.
• If the glass tip and/or junction are dry, soak the electrode in
HI70300
storage solution for a
minimum of 30 minutes.
• Rinse with water.
• Calibrate before using.
In case of loss of shielding due to low electrolyte level: empty electrolyte with a syringe and refill with
fresh
HI7071
3.5M KCl with AgCl reference electrolyte.
STORAGE
• To ensure a quick response, the glass tip and the junction should be kept moist and not allowed
to dry.
• Replace protective cap with a few drops of
HI70300
storage solution. Follow PREPARATION
above before taking measurements.
• Replace the fill hole cover.
Note: Never store the electrode in distilled water.
PERIODIC MAINTENANCE
• Inspect the electrode for any scratches or cracks. If any present, replace the electrode.
• Rinse off any salt deposits with water.
• Follow the STORAGE procedure above.
CLEANING PROCEDURE
• Soak in Hanna
HI7061
electrode cleaning solution for general use,
HI700663
cleaning solution
for soil deposits or
HI700664
cleaning solution for humus deposits for 20 minutes. Rinse well
and condition.
• Soak the electrode in
HI70300
storage solution for a minimum of 30 minutes. Rinse with
water. Calibrate before using.
TROUBLESHOOTING
• pH Meter: Follow the meter’s operating and calibration procedures.
• Electrode: Evaluate your electrode performance based on the
Sensor check
procedure on page 10.
