Purpose
This application enables you to correct
weighing errors that occur due to air
buoyancy when you work with weights
of various densities.
You can use this application in
combination with a program chosen
from Application 2 (checkweighing,
time-controlled functions) and one from
Application 3 (totalizing, statistics).
Air buoyancy correction cannot be
combined with the formulation and 2nd
tare memory applications.
The air density value is required for
calculation of the air buoyancy correction
factor. Because not every location has an
air density of 1.2 kg/m
3
, the density of a
particular location can be determined using
the air density determination routine.
87
Features
Buoyancy correction:
– Automatic initialization of this
application and loading the density of a
weighed object stored in the nonvolatile
memory,
RhoW and the air density
RhoA last saved; display of RhoW in
the line for text.
– Automatic start of air buoyancy correc-
tion and display of the
a symbol for
calculated values, if selected in the
Setup menu (Setup: Auto-start applica-
tion when power goes on: Yes)
– Input of the density of a sample or an
object using the numeric keys and by
pressing the
RhoW soft key. This
activates air buoyancy correction, if not
yet activated.
– Input range for the density of a sample:
0.1 g/cm
3
– 22.5 g/cm
3
.
– Storage of density values (
RhoW and
RhoA) in the non-volatile memory.
– Deactivation of air buoyancy correction
by toggling to the “Weighing” mode
(weighing without air buoyancy
correction)
Air Density Determination:
– To determine the air density, use the
special weight set, YSS45, which is
available as an accessory. This weight
set consists of one steel and one
aluminum weight and is available with
the “Weight Specifications” certificate.
The densities of the steel (8.0) and
aluminum references (2.7) are preset
values and cannot be changed.
– Determine the air density by
– entering the density using the
numeric keys
– entering the specifications for
steel/aluminum and weighing the
steel and aluminum weights
(accessory: YSS45)
– If you enter an air density using
the numeric keys, the reference values
(density and weight) for steel and
aluminum are deleted from the display
page “AIR D. PARAMETRS.”
– After the air density has been
determined and saved by pressing the
Start soft key, the reference values
are printed out
– Preset value for air density: 1.2 kg/m
3
– Range for entering air density values:
1.0 kg/m
3
– 1.4 kg/m
3
.
– You can activate or deactivate air
density determination in the Setup
menu, thus blocking access to
this program routine.
– The air density is generally determined
in grams as the weight unit.
– If air density determination is deactivated,
the air density
RhoA will be displayed
for 2 seconds in the text line when you
press the
RhoA soft key.
– After the air density has been
determined, you can save the value,
but this is not required
– You can block storage of the specifica-
tions (references) in the Setup menu.
(Setup: Application parameters:
Application 1: Air buoyancy correction:
Change steel/aluminum references)
– The density values on the display page
for reference values are standard,
inalterable values
Air Buoyancy Correction
G
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