Xylem CellOx 325 Dissolved oxygen sensor - Manual (Page 9)

CellOx 325 Maintenance, cleaning, replacement
25
Carefully shake off the drops
of water. Fill a new membrane cap with
ELY/G electrolyte solution. Remove any air bubbles by
carefully tapping the mem-
brane head. Additionally, you
can prevent air bubbles by
throwing the first fill away and
refilling the membrane head.
Thoroughly rinse the sensor
head with electrolyte solution. Hold the sensor inclined and
screw on the membrane head
fingertight using a paper tow-
el. Excess electrolyte solution
is forced out of the ventilation
area. Check the filling:
Inspect the face surface. No
air bubbles may be present
within the dashed circle
(approx. the black area). Air
bubbles outside this area do
not interfere.
Note
For measurements under high pressure the filling must be com-
pletely free of air bubbles.
Readiness to measure After approx. 30 to 50 minutes, the sensor is ready for operation.
Subsequently calibrate the sensor.
Note
If you want to measure very low oxygen concentrations (< 0.5 %
saturation), we recommend to let the sensor rest overnight and
then calibrate it.
EL
Y/G
EL
Y/G
4 mm