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MAINTENANCE
13. MAINTENANCE
13.1. ELECTRODE CARE & MAINTENANCE
Proper care and maintenance of the pH probe is essential for accurate readings. Cleaning, calibrating,
and appropriate storage will extend the life of the probe.
• Remove the electrode protective cap. Do not be alarmed if any salt deposits are present, this is
normal. Rinse the probe with water.
• Shake the electrode down as you would do with a clinical thermometer to eliminate any air bubbles
inside the glass bulb (pH electrode only).
• If the bulb and/or junction are dry, soak the electrode in HI70300 storage solution for a minimum
of 30 minutes. Rinse with water.
• Calibrate before using.
• When the electrode is not in use, add a few drops of HI70300 storage solution to the protective
cap and replace the cap. To ensure a quick response, the glass bulb (pH electrode) and the junction
should be kept moist and not allowed to dry out. This can be achieved by installing the electrode in
such a way that it is constantly in the flow cell or the pipe filled with the sample.
Note: Never store the electrode in distilled or deionized water.
13.2. PUMP TUBING REPLACEMENT
For pump tubing replacement please wear protective gloves and eye protection at all times; and follow
the steps below:
1. Power off the controller.
2. Disconnect the tubing from the pump.
3. Remove the plastic cover from the pump, which is fixed with a screw.
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