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Semi-Micro Osmometer K-7400S instructions, V3700
11.2.1 Reference thermometer
Additionally, you can check the device with a calibrated reference ther
mometer. This thermometer should display temprature changes quickly.
1.
Fill the cooling cavity close to the top with water (HPLC quality) and
insert the thermometer.
2.
Perform the test as described above and observe the temperature
pro gression.
3.
After the test, it is necessary to dry completely the cooling cavity with
a tissue.
The cooling capacity is usually sufficient for a sample volume of 150 µl in
the sample tube if the freezing turbulence in the solution is initialized by a
start of the stirring wire within 150 seconds.
If the temperature of – 13 °C cannot be obtained, the device must be
returned for repair.
Note:
The shape of the stirring wire is essential for a precise and repro
ducible measurement. Therefore, take care to not bend it. The lower end
of the wire should contact the tube wall.
11.3 Transport
Carefully prepare the device for transport. If you want to return your
device to KNAUER for repairs, enclose the Service Request Form which
can be downloaded from our website.
For a secure transport, note the weight and dimensions of the device
(see next chapter„Technical data“).
Bruising danger
Damage to the device by carrying or lifting it on protruding housing
parts. The device may fall and thus cause injuries.
Lift the device only centrally on the side of the housing.
Process
