Xylem MPP 350 User Manual
Page 17
MPP 350
Maintenance, cleaning, replacement
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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 cap. Additionally, you
can prevent air bubbles by
throwing the first filling away
and refilling the membrane
cap.
Thoroughly rinse the sensor
head with electrolyte solution.
Hold the sensor inclined and
screw on the membrane cap
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. 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
The D.O. module is ready for operation after approx. 30 to 50 min-
utes. Subsequently calibrate the sensor for D.O. measurements.
Note
If you want to measure very low D.O. concentrations (< 0.5 % sat-
uration), we recommend to let the sensor rest overnight and then
calibrate it.
EL
Y/G
EL
Y/G
Ventilation area
points upwards
4 mm