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OSMOMAT 050 User Guide
Version 1.1 (2011-10-12)
5. To verify the correct setting, move the bottle back to the tray. This will revert to the zero point.
Figure 5-6: Checking the zero point
The setting of the zero point should also take less than 10 seconds. The measurement system is still
subject to a slight drift directly after installing the membrane. The zero point deviates slightly.
Therefore, calibration shouldn't be performed until the pressure ratios have completely stabilized. Also,
it should be repeated once or twice.
6 Measuring the Colloid Osmotic Pressure
6.1 Prerequisites for Measurement
The OSMOMAT 050 prepared according to
item 4
and calibrated according to
item 5
as well as a
precision syringe with special cannula for injecting the sample (included with the accessories: order
no. 50.9.0100) are required to perform a measurement. This special cannula has a needle-shaped tip
with a lateral opening which creates a clean, self-sealing hole when puncturing the silicon septum.
Standard injection cannulas cut out rubber particles during injection, clogging the measuring cell and
rendering the silicon septum unusable.
The STANDBY LED indicates that the OSMOMAT 050 is ready for measurement.
If the unit was not used for an extended period of time, you should press the “RESET” button prior to
measurement. This will rinse the measuring cell and reset the zero point.
Summary of Contents for OSMOMAT 050
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