VWR OX 4000 H, Operating Manual

Page: 46 / 49

What to do if... OX 4000 H
46 ba75853e04 06/2012
Error message,
E3
Cause Remedy
Invalid calibration
D.O. sensor:
– Electrolyte solution depleted – Replace and refill the
membrane cap
– Membrane contaminated – Clean membrane
– Electrode system poisoned – Clean the electrodes
– Membrane damaged – Replace and refill the
membrane cap
– Obsolete – Replace sensor
– Broken – Replace sensor