In-Situ smarTROLL Multiparameter Handheld Operators Manual - Manual (Page 70)

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Cleaning Procedure 1
Avoid damaging the plastic material of the conductivity cell. Gently scrub the
conductivity cell with a soft swab and mild soap such as a dilute solution of dish
detergent. The probe is shipped with polyurethane foam swabs for this purpose. You
can also achieve good results using a gentle back-and-forth motion with a thin cotton
pipe cleaner. If debris is still present, continue to Cleaning Procedure 2. If the sensor is
clean, skip to the last step.
Cleaning Procedure 2
Avoid damaging the plastic material of the conductivity cell. Gently scrub the
conductivity cell with a foam swab and an aggressive soap such as Alconox cleaner. If
debris is still present, continue to Cleaning Procedure 3. If the sensor is clean, skip to
the last step.
Cleaning Procedure 3
Soak the sensor with dilute acetic acid (10:1 solution) or commercially available
household vinegar to pre-soften calcium deposits. Follow this with Cleaning Procedure
1 or Cleaning Procedure 2, depending on the degree of residual contamination. The
probe can soak for any length of time in household vinegar. If debris is still present,
continue to Cleaning Procedure 4. If the sensor is clean, skip to the last step.
Cleaning Procedure 4
Topically apply dilute phosphoric acid (< 27 %) or the consumer product LIME-A-WAY
with a soft swab to remove iron or calcium deposits that remain after using Process 3.
Do not allow the cleaner to be in contact with the sensor for more than 10 minutes.
Rinse well with clean water and continue to the last step.
Check the sensor calibration before redeployment. Recalibrate the sensor when
necessary.