Humboldt H-4291 Universal Sample Splitter User Manual
Page 2
1. Adjust splitter bars for desired chute width as follows:
a. Loosen two wing nuts, one on each end of splitter.
b. Lock the hopper in the "open" position by using the Safety Lock beside
the hand lever. (Not necessary on Model H-4291.)
c. Flip the adjustable chute bars back and forth to form alternate right
and left chutes of desired width. A chute width of two to three times
materials topsize is recommended. Check to be sure the width chosen
results in the same number of chutes in either direction.
d. Lighten wing nuts, remove Safety Lock, and close hopper.
2. Place sample in closed hopper, distributing as you pour, and level by hand
until material is evenly distributed from side-to-side and from front to back
in hopper. Position pans.
3. Open gates of hopper using a smooth, rather fast motion of the hand lever.
Sample will divide to half the original portion in each of the bottom pans.
(NOTE: Hopper gate of Model H-4291 is spring loaded and lever is merely
released from holding notch to open hopper).
4. If a smaller sample fraction is needed, transfer portion in one pan to closed
hopper, level, and split again. Repeat until the desired fraction is reached,
1/4, 1/8, 1/16, 1/32, etc.
5. Sampling accuracy can only be as good as the methods employed. We
suggest the following additional tips be employed as part of your standard
sampling procedures:
a. Prior to splitting your sample fraction, mix the sample by repetitive
dividing and recombining entire sample in the hopper. Repeat until
starting sample is thoroughly mixed.
b. When pouring samples into hopper, always use care to distribute
material back and forth in layers as you pour.
c. If bridging or hang-up of material occurs in the chute bar area, reset
the splitter for wider chute widths.
d. Always be sure your chute bar setting gives an equal number of
alternating chutes in each direction. The following chute openings
are permissible:
Model H-4288: 1/2", 1", 1-1/2", 2", 3", 4", 6"
Model H-4289: 1/2", 1", 1-1/2", 3"
Model H-4290: 1/4", 1/2", 3/4", 1", 1-1/2", 2", 3"
Model H-4291: 1/8", I-1/4", 3/8", 1/2"
6. To position chute attachment on Model H-4288, remove wing nuts from the
studs on back of splitter. Insert top of bag loading chute over support angles