wtw Oxi 7310, Operating Manual

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What to do if... Oxi 7310
48
ba75931e03 12/2011
11 What to do if...
11.1 Dissolved oxygen
Error message,
OFL, UFL
The measured value is outside the measuring range.
Error message,
Error
Error message,
Leak
11.2 General information
Sensor symbol
flashes
Display
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
– Measured value outside the mea-
suring range of the meter
– Use a suitable D.O. sensor
Cause Remedy
– D.O. sensor contaminated
– Electrolyte depleted – Clean the D.O. sensor.
– Changing 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
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
Cause Remedy
– Batteries almost empty – Replace the batteries (see
section 10.1 M
AINTENANCE
,
page 46)