Humboldt H-4291 User Manual

03.09

product manual

Universal Sample Splitters

Models: H-4288,

H-4289, H-4290, H-4291

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 per missible:

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

that normally hold material pan, fitting holes over threaded studs. Replace
wing nuts. With bag-tightening lever in horizontal position (right or left),
draw top of bag over sharp corners of chute bottom and reverse fold bag
on top of bag-tightening lock tab. Lift lever to secure bag.

7. Models H-4290, and H-4291 are manufactured with 60° chute slopes as
required for coal or coke (ASTM D2013, D346) or for other materials
requiring a steep slope for proper sample flow. Other models may be easily
changed to 60° from the standard 45° chute slopes by adding the following
adapter kits in the field:

Kit for H-4288: Model H-4288.4
Kit for H-4289: Model H-4290.4

For H-4289:
Two-position stop is used on hopper gate lever. When in Position 1, safety stop
holds hopper open during cleaning or bar adjustment. Position 2 controls the
maximum amount hopper can open. Failure to utilize this stop may allow material
to feed outside of chute area.

Warranty

Humboldt Mfg. Co. warrants its products to be free from defects in material or
workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co.,
factory replacement of any part or parts of such product, for the warranty of this
product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions
of Sale. The purchaser is responsible for the transportation charges. Humboldt
Mfg. Co. shall not be responsible under this warranty if the goods have been
improperly maintained, installed, operated or the goods have been altered or
modified so as to adversely affect the operation, use performance or durability
or so as to change their intended use. The Humboldt Mfg. Co. liability under
the warranty contained in this clause is limited to the repair or replacement of
defective goods and making good, defective workmanship.

Humboldt Mfg. Co.

875 Tollgate Road
Elgin, Illinois 60123 U.S.A.

Testing Equipment for

HUMBOLDT

www.humboldtmfg.com

U.S.A. Toll Free: 1.800.544.7220

Voice: 1.708.456.6300

Fax: [phone]

Email: [e-mail]

Construction Materials