wtw OxiCal-SL - Troubleshooting; D. O. System Messages; Other Possible Errors - D.O. Measurement

Oxi 330
Oxi 340
Troubleshooting
44
D. O. system messages
System message Cause Action
/
Indication range
exceeded
Short circuit between gold
and lead electrode
Check probe,
if necessary exchange

Inadmissible
calibration
• Electrolyte solution used up
• Membrane contaminated
• Electrode system poisoned
Regenerate probe
Clean membrane
Regenerate probe

Damaged
membrane
• Membrane damaged
• Membrane head not
tightened properly
Regenerate probe
Tighten membrane head
Other possible errors - D. O. measurement
System message Cause Action
Measured value
too low
Insufficient flow Provide flow
Measured value
too high
• High share of solutes
• Air bubbles bump on
membrane with high velocit
y
• The carbon dioxide pressure
is too high > 1 Bar
Correct solubility function by
entering the salinity equivalent
Flow should not meet
membrane directly
No measurement possible