Xylem MULTI 3400i pH/Oxi MULTI-PARAMETER METERS - Manual (Page 65)

pH/ 3400i What to do if...
65
6.2 Oxi system messages
Error message
0FL 0FL 0FL 0FL
Error message
E3 E3 E3 E3
Error message
E7 E7 E7 E7
AR flashes
continuously
Cause Remedy
Display range exceeded
D. O. probe:
– Not connected – Connect the probe
– Cable broken – Replace probe
– Depleted – Replace probe
– Short-circuit between gold and
lead electrode
– Clean probe and replace it if
necessary
Cause Remedy
Invalid calibration
D. O. probe:
– Electrolyte solution depleted – Regenerate probe
– Membrane contaminated – Clean membrane
– Electrode system poisoned – Regenerate probe
– Worn out – Replace probe
– Broken – Replace probe
Cause Remedy
Membrane damaged
– Membrane damaged – Regenerate probe
– Membrane head not screwed
on tight enough
– Screw membrane head tight
Cause Remedy
No stable measured value
– Membrane contaminated – Clean membrane