RADWAG WLY Scales - Manual (Page 158)

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Caution:
If in the local parameters, <
Ask about sample number> function
is enabled, then on initiating the process, the system asks for inserting
the number of tested sample. The inserted sample number is linked to
the process data and saved in the database.
• The first phase of density determination process is weighing a
pycnometer (if its mass has been determined as “0” in the local
parameters) – place an empty pycnometer on scale’s weighing
platform. On obtaining stable measurement result, accept it by
pressing
key. If mass of a pycnometer has been determined
in parameter <
Pycnometer mass>,
then this phase of the
process is omitted,
• Then place on the scale’s weighing platform a pycnometer filled
with liquid. On obtaining stable measurement result, carry out the
measuring process, and accept it by pressing
key,
• On carrying out the measurement of the pycnometer with tested
liquid, the scale determines the density of the liquid, and the density
determination result is indicated on terminal’s display. If the user
needs a report from the density determination process, it can be
printed on a plugged printer by pressing
key. The density
determination process is then completed,
• A report from density determination using a pycnometer is saved
in <
Density>
database. The report is named by process date.
31.3.4. Determining density of a porous body
Determining density of a porous body is carried out in three phases:
• Weighing a porous body in the air,
• Weighing in the air of a porous body impregnated with oil,
• Weighing in auxiliary liquid of a porous body impregnated with oil.
In case of porous objects, it is necessary to carry out an oil bath, which fills
and closes the pores of the material before its acutal weighing in the auxiliary
liquid.