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PROBE CONDITIONING & MAINTENANCE
17. PROBE CONDITIONING & MAINTENANCE
General Maintenance
• After prolonged storage or cleaning, calibration of the probe is required.
• After use, rinse the probe with tap water and dry it.
• Inspect all sensor connectors for corrosion and replace if necessary.
pH & ORP Sensor Maintenance
• Remove the sensor protective cap. Do not be alarmed if any salt deposits are present. This is normal
with pH / ORP probes and they will disappear when rinsed with water.
• Shake down the probe as you would do with a clinical thermometer to eliminate any air bubbles
inside the glass bulb.
• If the bulb and / or junction are dry, soak the electrode in
HI70300
Storage solution for at least 30 minutes
• To ensure a quick response, the glass bulb and the junction should be kept moist and not allowed
to dry. 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. Store the sensor with a few drops of
HI70300
Storage
solution or pH 4.01 in the protective cap.
Note:
Never use distilled or deionized water when stored.
Periodic Maintenance
• Inspect the electrode for any scratches or cracks. If any are present, replace the electrode.
• Inspect the cable. The connection cable must be intact.
• Rinse off any salt deposits with water.
pH Cleaning Procedure
1. Soak the sensor in
HI7061
Electrode cleaning solution for general use or application specific
cleaning solution for 15 minutes.
2. Rinse with water.
3. Soak the electrode in
HI70300
Storage solution for at least 30 minutes, rinse with water and
calibrate before using.
Protein, Inorganic, Oil or Grease Cleaning Procedure
1. Soak the sensor in application specific electrode cleaning solution (i.e.
HI7073
Protein cleaning,
HI7074
Inorganic cleaning for 15 minutes or
HI7077
Oil & Fat cleaning solution).
2. Rinse the sensor with water.
IMPORTANT:
After performing any of the cleaning procedures, rinse the electrode thoroughly
with water and soak in
HI70300
Storage solution for at least 30 minutes before reinstalling it.
