What To Do If; Dissolved Oxygen; General Information - wtw Oxi 7310 Operating Manual

What to do if...

Error message,
OFL, UFL
Error message,
Error
Error message,
Leak
Sensor symbol
flashes
Display
48
11 What to do if...

11.1 Dissolved oxygen

More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
The measured value is outside the measuring range.
Cause
– Measured value outside the mea-
suring range of the meter
Cause
– D.O. sensor contaminated
– Electrolyte depleted
Cause
– Membrane cap not screwed on
tight enough
– Hole in the membrane

11.2 General information

Cause
– Calibration interval expired
Cause
– Batteries almost empty
Remedy
– Use a suitable D.O. sensor
Remedy
– Clean the D.O. sensor.
– Changing the electrolyte and
membrane cap
– If necessary, replace the D.O.
sensor
Remedy
– Screw membrane head tighter
– Replace and refill the mem-
brane cap
Remedy
– Recalibrate the measuring
system
Remedy
– Replace the batteries (see
section 10.1 M
AINTENANCE
page 46)
ba75931e03
Oxi 7310
,
12/2011