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OSMOMAT 050 User Guide
Version 1.1 (2011-10-12)
Components
Function
Malfunction
Possible Cause
Measure
Lower measur-
ing cell
Membrane
Long adjustment time
after inserting a new
membrane
Air bubbles in lower half of measuring cell
Membrane impermeable (pore size too
small or membrane stored too long)
Open and clean cell again, fill
with degassed solvent and
insert a new membrane
Insert fresh membrane with
cut-off 20,000 dalton
No measurement
value: measurement
value is 0 when
measuring a sample
(no problems during
calibration)
Membrane inserted incorrectly (active side
facing down)
Measuring cell is not yet screwed together
tightly enough
Insert a new membrane into
the cell (active side facing up)
Screw cell together more
tightly
Reproducibility of
measurement value is
unsatisfactory (mea-
surement value too
low)
Pump tube too old (flagged). Part of the
injected sample flows toward the pump
System partially clogged between measur-
ing cell and waste bottle
Strong fluctuations of ambient temperature
(direct sunlight, draft, etc.)
Air bubbles in tube between measuring cell
and waste bottle
Waste bottle is empty, therefore no defined
zero point exists
The plunger in the waste bottle does not
hold the tube on the bottom of the bottle
Measuring cell is not yet screwed together
tightly enough
Entry of measuring cell is clogged
Replace pump tube
Clean / replace tube nipple
All tubes behind the measur-
ing cell, the plunger of the
waste bottle, the channel and
the outlet cannula in the upper
half of the measuring cell
must be cleaned
Move device to different loca-
tion
Rinse out air bubbles
Fill waste bottle with a bit of
water (approx. 10 mm)
Check position of plunger
Screw measuring cell together
more tightly
Open and clean measuring
cell
Содержание OSMOMAT 050
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