Operating instructions

The “Density” application
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10.4.2 Density determination of liquids using a sinker
To determine the density of liquids, use is often made of a sinker whose volume is known. The sinker is first tared in air and then weighed
in the liquid whose density must be determined. The difference between these weight values gives the buoyancy, which is used by the
firmware to calculate the density.
In the application-specific settings for the method, select “Liquid” (section 10.3.2).
Activate the appropriate function keys and information fields (sections 10.3.6 and
10.3.7). The example at left shows settings for the density determination of liquids using
a sinker. Note: The “Temp. AL” function key which is shown activated in the example at
left, as well as the information field with the same name, is not required for this method
of density determination. If you wish, however, you can use this function key to enter the
current ambient temperature so it is printed on the report as a record of the temperature
at which the density was determined.
Press the “Vol. Sinker” function key and enter the volume of the sinker (in this example
10.00000 cm³).
Press the “Start” function key to start the density determination. You are then prompted
to install the sinker (weighing in air for taring).
If you are working with the optional density kit, follow the instructions supplied with the
kit. If you are working with the below-the-balance hanger (see note, section 10.1), hang
the sinker on the hanger.
Press “OK” to tare the sinker.
The weighing result is saved and you are then prompted to immerse the solid body in
the auxiliary liquid.
If you are working with the optional density kit, follow the instructions supplied with the kit.
If you are working with the below-the-balance hanger, place the container with the auxiliary
liquid under the hanger. In either case, make sure that the solid body is immersed by at
least 1 cm in the liquid and that there are no air bubbles in the container.
The weight of the solid body in the liquid is displayed in the bottom left corner of the
window.
Press “OK” to accept the weight value.
The balance now determines the density of the solid body and displays the result. Either
the compensated result, the uncompensated result, or both is/are displayed depending
on the settings you made for the result display (see section 10.3.5).
If a printer is connected, you can press the «F» key to print out a report of the density
determination result according to your specifications (section 10.3.8). The result is saved
until the next density determination using the same method has been completed, so it
can be printed out again if required. You will find an example of a report along with cor-
responding explanations in section 10.4.6.