Multi 3320
What to do if...
ba77053e04
07/2018
89
14.3 Dissolved oxygen
Error message
OFL, UFL
The measured value is outside the measuring range.
Error message,
Error
Error message
Leak
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause
Remedy
– The measured value is outside
the measuring range of the meter
– Use a suitable D.O. sensor
Cause
Remedy
– D.O. sensor contaminated
– Electrolyte depleted
– Clean the D.O. sensor
– Change the electrolyte and
membrane cap
– If necessary, replace the D.O.
sensor
Cause
Remedy
– Membrane cap not screwed on
tight enough
– Hole in the membrane
– Screw membrane head tighter
– Replace and refill the mem-
brane cap
