ent screw found
directly above the scale hook until the scale pointer is vertical, reading
1.000 on the outer ring of the dial. The scale is now calibrated.
Determining the Specific Gravity of Dry Solids:
The innermost circle
marked for determining the specific gravity of dry solids is used for this
purpose. A sample of material for determination should be dry and pref-
erably all -10 mesh, +100 mesh. Hang the dry empty bucket on the pulp
density scale; then pour in the sample of dry material until the pointer
indicates 1000 grams (1.000 kilograms) on the outer circle of the dial. At
this point the bucket will contain one kilogram of dry material. Dump the
sample material onto a rolling cloth or paper sheet. Fill the bucket about
1/3 with clear water. Pour the sample slowly into the bucket, making sure
that all material is thoroughly wetted, and all air bubbles are eliminated.
After the material has been pulped in this fashion, add clear water until
the bucket is filled to the overflow level. Hang the bucket on the scale and
read the specific gravity of the dry solids directly on the innermost circle of
the dial.
Taking a Sample:
Fill the plastic bucket with pulp or liquid requiring measurement. The liquid level should reach the spill
holes in the bucket. Any spill on the outside of the bucket should be washed off. Hang the bucket on the scale and
determine the specific gravity or percent of solids.
Determining Specific Gravity of Pulp:
To obtain this measurement, hang the filled bucket on scale and read directly on
the outer white ring where pointer stops.
Determining Percent Solids:
Hang filled bucket on scale. Select the correct dial ring for the specific gravity of dry solids
of your material. For example, the specific gravity of dry solids of your material is 2.2 at the center vertical column showing
specific gravity of dry solids, 2.2 is the outer red ring, you would read the percent solids as being 44. At 2.6 specific gravity
which is the next inner ring, the percent solids is 39, for 2.8 specific gravity the reading is 37.25%, at 3.2 specific gravity
the reading is 35%, at 3.6: 33%, 4.0: 32% and at 4.4 the reading is 31%.
Changing Dial Faces:
Should the dial on the scale not cover the dry solids specific gravity range peculiar to your
operation, any of the interchangeable dial faces may be installed as follows:
1. Remove the scale, laying it flat on a table.
2. Loosen the thumbscrews on the sides of the scale and lift off the clear cover and retaining ring.
3. Remove the two screws and washers near the center of the dial. Do not remove or bend the pointer.
4. With pointer pointing directly at your body, take the selected dial in both hands with the split in the dial directly above
the pointer. Depress the right side of the split dial beneath the pointer, then rotate dial 270
°
clockwise. This then places
the dial beneath the pointer. turn dial to correct position lining-up with the two screw holes and the four positioning marks
on the outer rim of the dial.
5. Replace the two screws and washers. Replace the glass cover plate and retaining ring, tighten thumbscrews.
CAUTION:
The scale has been factory set. Do not remove the back cover plate of the scale or change any internal
adjustment. The scale has been constructed for trouble-free operation and will provide accurate measurement if the
mechanism is not altered.
Each scale is furnished with the #1 dial face having the following specific gravity range of dry solids:
# 1 2.2 2.6 2.8 3.2 3.6 4.0 4.4
Interchangeable Dial Faces are supplied
with the scale as follows:
# 2
1.2 1.3 1.4 1.5 1.6 1.7 1.8
# 3
1.7 1.8 1.9 2.0 2.1 2.2 2.3
# 4
2.2 2.3 2.4 2.5 2.6 2.7 2.8
# 5
2.6 2.7 2.8 2.9 3.0 3.1 3.2
# 6
3.0 3.1 3.2 3.3 3.4 3.5 3.6
# 7
3.4 3.5 3.6 3.7 3.8 3.9 4.0
# 8
3.8 3.9 4.0 4.1 4.2 4.3 4.4
# 9
4.2 4.3 4.4 4.5 4.6 4.7 4.8
#10
4.6 4.8 5.0 5.2 5.4 5.6 5.8
#11
5.6 5.8 6.0 6.2 6.4 6.6 6.8
#12
6.6 6.8 7.0 7.2 7.4 7.6 7.8
SEPOR, INC.
718 N. FRIES AVE.
P. O. BOX 578
WILMINGTON, CA 90748
PHONE: 310-830-6601
FAX: 310-830-9336
PULP DENSITY SCALE