Xylem MULTI 1970I PORTABLE MULTIPARAMETER METERS - Manual (Page 71)

Multi 1970i What to do if...
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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
Oxygen sensor
– Not connected – Connect the sensor
– Cable broken – Replace sensor
– Depleted – Replace sensor
– Short-circuit between gold and
lead electrode
– Clean sensor and replace it if
necessary
Cause Remedy
Invalid calibration
Oxygen sensor
– Electrolyte solution depleted – Regenerate sensor
– Membrane contaminated – Clean membrane
– Electrode system poisoned – Regenerate sensor
– Obsolete – Replace sensor
– Broken – Replace sensor
Cause Remedy
Membrane damaged
– Membrane damaged – Regenerate sensor
– Membrane head screwed on
not tight enough
– Screw membrane head tight
Cause Remedy
No stable measured value
– Membrane contaminated – Clean membrane