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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.