AMI Trides
Troubleshooting
A-96.250.111 / 211019 57
7.2. Troubleshooting List
Problem Possible Reason
“No sample flow or
Current Value too
low” during
<Process Trides>
Insufficient or no sample flow.
pH too high
The process value used for a calibration
should be at least 0.15 ppm at a pH 7.
The higher the pH, the lower the current
available for calibration. If the pH is > 8 a
process value of higher than 0.5 ppm is
necessary for calibration.
Contaminated sensor.
Sensor does not provide enough current
for the value measured with the DPD
method. Clean sensor. In case of
repeated sensor contamination, check for
copper tubes and/or water treatment
chemicals such as cyanuric acid and
corrosion inhibitors.
Zero too high
The last zero calibration was too high.
Repeat the Zero Trides after min. 48
hours of uninterrupted operation or
perform “Set defaults Calibration”.
Attention: “Set defaults Calibration”
deletes all previous calibration values!
Unstable values
Sample taken too close to feeding line.
Sample flow too irregular or too low.
Electrode cable broken or wet.
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