1 THE OSMOMAT 070 VAPOR PRESSURE OSMOMETER ...

6 User Manual OSMOMAT 070 Version 1.2
The following items are located on the rear of the unit:
Figure 1-2 Osmomat 070, Rear
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(5) Socket for connecting the cell head
(6) Potentiometer for fine adjustment of the head temperature
(7) Connector sockets A and B for the measuring probes
(8) Power connector for plugging the cell unit into the mains voltage via the control unit
(9) Mains fuse for two-phase protection of the cell unit 230V/2.5A, 115V/4A
(10) Nameplate with information on the unit type, serial number, supply voltage, power consumption
and line frequency
(11) Connector socket for connection to the control-unit
(12) Connector socket for connection of a recorder
1.2.3 Design of the measurement cell
The beaker-shaped measurement cell is located in a thermostat with a very constant temperature that
can be adjusted in one-degree stages between 30°C and 130°C. The cell thermostat surrounds a
cylindrical beaker that contains a small amount of solvent (filling level is about 1 cm). To achieve 100%
vapor saturation, the beaker contains vapor wicks in the form of filter paper strips.
Two measuring probes with temperature sensors are suspended in the cell space saturated with solvent
vapor. The bottom ends of the measuring probes are coated with drops of solvent or solution. An even
drop size is achieved through wire coils attached to the bottom end of the measuring probes. They make
it easier to rinse the probes, because the liquid can drain off spirally and the probes can be thoroughly
wetted. The solvents or solutions are fed through glass syringes that are placed in the cell head along
with the measuring probes.
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6 User Manual OSMOMAT 070 Version 1.2
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