27
9-6. EJ-13 Density determination kit
Using this option and calculation program, the balance can determine the density
(specific gravity) of a sample.
EJ-13 is for use with the EJ-120 / EJ-200 / EJ-300 / EJ-410 / EJ-610.
EJ-13 Installation
Remove the weighing pan and the
fixing frame.
Install the beaker stand on the balance
and attach the pan stand to the pan
support of the balance.
Place a beaker filled with water on the beaker stand and place the sample weighing
pan on top of the pan stand.
Density (specific gravity) measurement
The density for a liquid can be set two ways. One is to set the water temperature
and the other is to set the density value directly.
The factory setting for density of a liquid is 25 °C as water temperature (the density
value,
ρ
= 0.99704 (g/cm
3
), is used for calculation).
The density (specific gravity) is calculated by the following formula.
S = X
ρ
S: Density (specific gravity) of a sample
A: Weight in air
B: Weight in liquid
ρ
: Density of liquid (water)
The result is shown with two decimal places.
A
A-B
Weighing pan
Fixing frame
Sample weighing pan
Beaker stand
Pan stand
Upper pan to weigh in air
Lower pan to weigh in water
Pan support
