Hanna Instruments HI 9829 - Manual (Page 83)

83
ISE Sensor Maintenance
• After measurements inspect o-ring, connector and body. Rinse ISE sensor with
tap water to remove films or other coatings.
• •• •• Shake down the sensor as you would do with a clinical thermometer to eliminate
any air bubbles.
• Soak the electrode in its corresponding 10 ppm calibration solution for at least
1/2 hour prior to calibration. Store dry in protective cap when not in use.
• For long-term storage rinse the electrodes with water. Shake off the excess
water and replace the storage cap to prevent evaporation of the reference
electrolyte. Do not use hard pH caps used for other product lines. Do not
store in water or pH storage solution.
• For chloride sensors (HI 7609829-11), if the sensor pellet appears tarnished,
use a polishing strip to remove the oxidized surface. Cut off approximately a 1
inch piece of the strip. Wet the frosted side with water and place against dam-
aged surface. Place your thumb against the shiny backing and slowly rotate
back and forth while applying gentle pressure.If dark deposits appear on the
frosted surface, move the paper slightly. Continue polishing until you are satis-
fied with the surface. Rinse sensor with water. Do not use hard pH caps used
for other product lines. Do not store in water or pH storage solution