Hach ORBISPHERE 3654 Basic User Manual page 30

Symptom
Low readings
High readings
30 English
Cause
Sample flow rate too low
Degassing
Membrane is not at sample
temperature
Membrane not clean
Incorrect solubility curve
Incorrect calibration
Membrane is not at sample
temperature
Incorrect solubility curve
Incorrect calibration
Possible Solution
Check flow rate
Adjust forcing gas and/or sample flow rate
Allow sample to flow past the membrane to make
sure the membrane is at sample temperature
before making measurements
Clean system
Change solubility
Recalibrate
Allow sample to flow past the membrane to make
sure the membrane is at sample temperature
before making measurements
Change solubility
Recalibrate