15
Pr
OBE
mA
iNTENANCE
9. PROBE MAINTENANCE
Periodic Maintenance
Proper care and maintenance is essential for accurate readings. Cleaning,
calibrating, and appropriate storage extends the life of the probe.
• Inspect connector for corrosion and replace probe if necessary.
• Inspect probe and cable for cracks or points of broken insulation.
If any present, replace the probe.
• After use rinse the probe with tap water and dry it.
• Monthly, a more thorough cleaning is advised. Clean the EC sensor
with a non-abrasive, mild detergent.
Cleaning & Conditioning
pH portion
• Remove the protective cap.
• 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
time, the glass bulb and the junction should be kept moist and not
allowed to dry.
• Rinse the sensor in flowing water then clean by soaking it for
1 minute in
HI7073
Protein cleaning solution or
HI7077
Oil and
fat cleaning solution. After cleaning, soak the sensor in
HI70300
Storage solution for 30 minutes before calibrating.
EC portion
• After every series of measurements, rinse the probe with tap water.
• If a more thorough cleaning is required clean the sensor with a soft
brush to loosen any debris.
• Use a mild detergent to remove oily coatings.
• Flush with purified water after cleaning.
Notes:
Recalibrate the meter after cleaning. If, after cleaning, the
meter still can not be calibrated, replace the probe.
For field applications, have a spare probe ready. When maintenance
does not correct the issue, change the probe and recalibrate the meter.
Storage
• Store the sensor with a few drops of
HI70300
Storage solution or
pH 4.01 buffer in the protective cap. Tap water may also be used for
a very short period (a few days).
• Never use distilled or deionized water to store pH sensors.
