A&D HR-250AZ, Инструкция по эксплуатации

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13. DENSITY MEAS UREMENT
(
SPECIFIC GRAVITY
)
The balance is equipped with a density mode. It calculates the density of a solid using the mass
value of a sample in air and the mass value in liquid. We recommend the use of the AD-1654
Density Determination Kit.
Notes
The density mode ( ) was not selected for use when the balance was shipped from the factory.
To use this mode, change the function table settings to activate the density mode.
Refer to "5-2 Storing Units".
The minimum display is 0.0001 g while using the density mode.
Formula to obtain the density
Density of a solid
The density of a solid can be obtained by the mass value of each sample in air, liquid and the liquid density.
Where
ρ
: Density of a sample
A : Mass value of a sample in air
B : Mass value of a sample in liquid
ρ
0
: Density of a liquid
Density of a liquid
By using a float with a known volume, the density of a liquid can be obtained by the mass value of the
float in air and liquid, using the volume of the float.
Where
ρ
: Density of a sample
A : Mass value of the float in air
B : Mass value of the float in liquid
V : Volume of the float
Prior to measurement: Changing the function table
Prior to measurement, change the function table as follows:
1 Selecting the density mode.
The density mode is not available in the factory setting.
To use the density mode, select and store the mode (
) in “Unit (
Unit
)” of the function table. Refer
to "5-2 Storing nits".
Then, the density moce can be selected as one of the weighing units, by pressing the MODE key,
2 Selecting the sample for measurement.
Select whether the measurement sample is a solid or liquid. (“Selectiion of a measurement sample
(
ldin
)” of the function table)
3 Selecting a way to set the density of a liquid
When “Density measurement of a solid (
0
)” is selected in step 2, select the liquid density input method
from the function table below.
Note
The following function table is displayed only when the unit of
Unit
is active. The table of the
density mode ( d5 fnc ) is displayed after 5if .
Class Item and Parameter Description
0
Water temperature
ldin
Liquid density input
1
Liquid density
0
Density measurement of a solid
d5 fnc
Density function
d5
Selection of a
measurement sample
1
Density measurement of a liquid
: Factory setting
A
ρ
= x
ρ
0
A
-
B
A
-
B
ρ
=
V