A&D UNDERHOOK
WEIGHING
Most of the A&D Series
of precision balances are equipped with a standard built in
underhook. These include:
The GP
Series of Precision High Capacity Toploading Industrial
Balances can be purchased with an optional underhook.
The EK-6000G/12KG can be purchased with
the optional EKW-07G under
hook assembly. The EKW-07G is attached to the bottom
of the main unit for weighing large objects that are difficult
to load on the weighing pan. The under hook assembly
allows for large object and magnetic material to be weighed
in suspension. The EK4000-H and
EK6000H can also be purchased with the optional EK-07H under hook assembly.
The underhook
makes density determination a relatively simple matter. The
steps outlined below explain just how easy the weigh below
feature is:
- You
can find the underhook behind the plastic plug on the under-side
of your HM, HR, HF, HFG series balance. The EK6000/12KG,
EK4000H/EK6000H and the GP-Series offer the underhook optional and you should have it installed.
- Place
the balance on a weighing table with a hole cut in it or
place the balance on a firm metal stand designed for underhook
weighing
- Hang
a light-weight weighing harness from the underhook, or thread
a strand of thin string/wire through the underhook.
- For
best results re calibrate the balance with the harness in
place.
- Place
the object on weighing harness or wire.
- The
weight (A) of the material
in air will be displayed on LCD. (example A = 10.0000g)
- For
density determination leave object on weighing harness and
lower into water at 10°C.
- Record
the weight (B) of the
material in now in water displayed on LCD. (example B = 0.4666g)
- Find
the water density (C) from the following table. (C = 0.99970 g/cm3)
| |
|
| 0°C |
0.99984 g/cm3 |
| 4°C |
0.99997 |
| 10°C |
0.99970 |
| 15°C |
0.99910 |
| 20°C |
0.99820 |
| 25°C |
0.99704 |
| 30°C |
0.99565 |
| Numbers
for reference only |
|
| Volume |
0.4666g |
| --------=0.4667
cm3 |
| 0.99970 g/cm3 |
| |
|
| Density |
10.0000g |
| --------=21.4
cm3 |
| 0.4667
cm3 |
|
| |
|
10. The density is 21.4
cm3 . This is most likely platinum. |
