Ohaus CARAT PLUS PRECISION JEWELRY BALANCES Density Determination Kit Manual - Manual (Page 5)

5
Figure 9. Sample Weighing in Air.
Figure 10. Sample Weighing in Liquid.
NOTE: When using an Explorer, Explorer Pro,
Adventurer, Adventurer Pro or Adventurer SL
balance, you will need to refer to a density table
for the liquid (
Q
o
). When a Voyager or Voyager
Pro balance is used, the density table for water
and ethanol is in the balance. Temperature has
to be entered into the balance to complete the
calculations.
PERFORMING DENSITY DETERMINATION (Cont.)
4. Fill the beaker with auxiliary
liquid (liquid of known den-
sity
Q
0
' usually distilled water
or ethanol). Insure that the
liquid will cover the sample
by at least 1 cm after immer-
sion.
5. Ensure that no air bubbles ad-
here to the immersed part of
the Weigh Below Hook. Re-
move air bubbles by moving
the Weigh Below Hook or by
means of a fine brush.
6. Close the draft shield doors and
tare the balance.
7. Open the draft shield of the
balance.
8. Place the solid on the top of the
Bracket as shown in Figure 9.
9. Close the draft shield doors and
weigh the solid (weight A ) and
tare the balance.
10. Open the draft shield of the
balance and place the solid
in the Weighing Pan of the
Weigh Below Hook in the liq-
uid as shown in Figure 10.
Ensure that there are no air
bubbles on the solid to be
weighed.
11. Close the draft shield doors
and weigh the solid (buoy-
ancy
P ).
12. Observe the temperature on
the thermometer and using
the formula specified earlier,
calculate the density of the
solid.
density kit.pmd 8/9/2005, 1:12 PM 5