Section 8 Maintenance
Regular maintenance is necessary for the best accuracy, stabilization time and life of the probe. Fully
rinse the probe with deionized water between measurements to keep the probe clean.
8.1 Clean the probe
Rinse the probe with deionized water regularly to remove mineral or sample buildup on the sensing
element. Symptoms of contamination:
• Incorrect or irregular readings
• Slow stabilization times
• Calibration errors
• Sample material stays on the probe
1.
Rinse the probe with deionized water. Blot dry with a lint-free cloth. Do not touch the tip of the
probe.
2.
Polish the white reference junction on the probe tip with a soft cloth or cotton swab. Refer to
on page 3. Do not polish the PVC sensing element in the center of the probe
tip. Do not use cleaning solutions. Make sure to fully rinse the probe with deionized water
between sample measurements to prevent mineral or sample buildup on the sensing element.
3.
Soak the probe for 30 minutes in a 100-mg/L ammonium standard solution.
8.2 Storage
Keep the sensor protection cap on the probe during storage to prevent damage to the sensing
element.
Note: Make sure to condition the probe after long-term storage. Refer to
on page 5.
1.
Rinse the probe with deionized water. Dry the probe with a lint-free cloth.
2.
Make sure that the probe sensor is dry, then install the sensor protection cap. Refer to
on page 3.
Section 9 Troubleshooting
Refer to
for general troubleshooting information. To check the probe performance, refer to
on page 11. To check the accuracy of sample measurements, refer to
Table 2 Troubleshooting information
Problem
Possible cause
Solution
Decreased probe performance
causes slow stabilization and
prevents accurate calibrations or
measurements.
The probe has contamination
on the sensing element.
Rinse and condition the probe.
Refer to
on page 10.
The reference junction is
clogged.
Fully rinse the reference junction
with deionized water. Shake the
probe down to remove air
bubbles.
The probe is not conditioned
to the sample sufficiently.
Condition the probe. Refer to
on page 5.
10
English
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