In-Situ Aqua TROLL 100 and 200 Operators Manual - Manual (Page 87)

Page 87 Aqua TROLL Operator’s Manual
• Rinse the Aqua TROLL Instrument and the Cal Cup
thoroughly with fresh calibration solution before
calibrating.
Problem: The calculated cell constant (Kcell) is higher than the
recommended range of 0.98 – 1.02.
Probable Cause: The electrical resistance of the calibration
solution was higher than expected for the nominal value,
or an air bubble was present in the sensing cell during
calibration.
Suggested Remedy: Check the following and then repeat the
calibration:
• Visually inspect the sensor for the presence of fouling
(most likely an obstructing material or organism); clean
as described in Section 9 of this manual.
• Ensure the calibration solution is not contaminated,
mislabeled, or partially diluted.
• Rinse the Aqua TROLL Instrument and the Cal Cup
thoroughly with fresh calibration solution before
calibrating.
• “Roll and tap” the Aqua TROLL Instrument in the Cal
Cup to dispel air bubbles as described and illustrated in
Section 5.
Section 10: Troubleshooting