Humboldt H-4310 Sieve Shaker - Manual (Page 2)

General
This test method determines the particle size distribution of fine and coarse aggregates
by sieving. Refer to ASTM C136. The sieve shaker consists basically of a cradle for hold-
ing the sieves, a power unit and a base. The cradle consists of a platform fastened to the
lower ends of two vertical support rods. The upper ends of which are shock mounted to
a horizontal support that are free to pivot about its mounting. A sieve holder, a retain-
ing ring and nuts on the vertical support rods hold the top bar firmly against the nest of
sieves.
Model H-4325: Accommodates sieve frames from 3" to 8" diameter, 10 or less full
height and 18 or less half height plus pan and cover. Built-in timer. Motorized.
Model H-4330: Accommodates sieve frames from 8" to 12" diameter, seven 3" deep full
height, ten 2" deep intermediate height or thirteen 1-5/8 deep half height sieves plus
pan and cover. Built-in timer. Motorized.
Model H-4310: Hand-cranked model similar to H-4325 for use in the field or other
locations where electric power is not readily available.
Sieve Set: Order separately, see sieve chart.
Installation & Method
Humboldt sieve shakers are shipped complete and ready for operation. Remove all pack-
ing materials. Place on sturdy and level surface. Plug power cord into an appropriately
grounded outlet.
Collect the field sample according to ASTM D75 and reduce to a test sample according
to ASTM C702. Dry to constant weight.
Operation
Select the sieves with mesh sizes that are to be used and stack them together beginning
with a pan at the bottom. Then the finest sieve followed by increasing coarser sieves
with the coarsest on top. Place stack of sieves in the shaker with the bottom pan resting
on the cradle platform. Cover the top sieve so that the stack can be easily secured in
the shaker. Secure the stack with the sieve hold-down bar on the top of the stack and
screw the nuts on the vertical support rods firmly against the holder. Adjust and tighten
the nuts at the top of the vertical support rods according to the weight of the material
in the sieves. The greater the weight of the load, the tighter the nuts should be. Start
the motor and observe the initial sieving action to see if the sieves are fastened securely,
readjust and tighten the nuts if necessary.
Set the built-in timer for the desired shake time and turn the machine on. The machine
will stop when the timer has expired.
REPORTS: Weigh the materials and record the weight and percentage of the original dry
weight that is retained in each individual sieve and in the bottom pan.
Adjusting Instruction
Select the sieves with mesh sizes that will supply the information needed and nest them
beginning with a pan on the bottom. Then the finest sieve followed by increasingly
coarser sieves with the coarsest sieve on top. Place a sample into the top sieve and
place a cover on it. Place the stack of sieves on the shaker and secure with the
hold-down bar, clamping it in place with the knobs on each side.
Depending on the weight of the sieve stack, an adjustment upward of the lower cradle
will be needed. Turn the large pulley and note when the eccentric drive has moved the
bottom cradle to the extreme right or left of its travel. At this point the shoulder bolt