AND HR Series Інструкція з експлуатації - Сторінка 17
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Друкувати сторінку6.2. Measuring the Density of a Liquid
Use the following procedure to obtain the density of a liquid.
1.
With the float hanging, press the RE-ZERO key
to set the displayed value to zero.
2.
Pour the liquid of which you want to measure the
density into the beaker.
Note: Make sure that the float is about 10
mm below the surface of the liquid.
3.
When the value displayed on the balance is
stable, record the value (A). At this time, ignore
the minus sign.
4.
Substitute the measured value in the following
equation to obtain the density of the liquid.
| A |
ρ =
V
Example: If the measured value (A) is 9.9704 g, the volume of the float (V, printed on the float
hook) is 10.00 g/cm
by the thermometer is 25°C, then the density value is:
9.9704
10.00
+ d
ρ :
Density of liquid (g/cm
A : Buoyancy of float (g)
:
V
Volume of float (g/cm
d : Density of air (g/cm
3
, the density of air (d) is 0.001 g/cm
+ 0.001 = 0.998 g/cm
3
)
3
)
3
)
3
3
(25°C)
15
Example display: BM
and the temperature indicated