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COM 381
Troubleshooting
Troubleshooting
COM 381
38
Hauser
Hauser
39
D. O. system messages
System message
Cause
Action
0FL
Indication range
exceeded
Short circuit between gold
and lead electrode
Check probe,
if necessary exchange
E3
Inadmissible
calibration
•
Electrolyte solution used up
•
Membrane contaminated
•
Electrode system poisoned
Regenerate probe
Clean membrane
Regenerate probe
E7
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 velocity
•
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
General system messages
System message
Cause
Action
Meter does not
react on
keypressing
Undefined operation state
of the processor, e. g.
after inadmissible EMC
admission (outside the
specified ranges)
Reset of processor:
Press RCL key and
switch meter on.
LoBat
Batteries nearly discharged.
Charge rechargeable batteries/
Change non-rechargeable
batteries
to
Timeout of serial interface.
Check connected
instrument.
is flashing
Set calibration interval has
run out.
Recalibrate probe.