Brookfield DV-I Viscometer - Manual (Page 26)

Brookfield Engineering Laboratories, Inc. Page 26 Manual No. M/92-021-O604
Spiral Adapter
Shear
Rate
Spiral Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ sec-1
SA-70 98 - 98,500 1,000-1,050,000 2,100-2,100,000 8,400-8,400,000 .00677 -
.67.7N
(1-100 RPM )
Viscosity (cP)
Cone/Plate Viscometer
Shear
Rate
Cone Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ sec-1
CPE-40 .30 - 1,028 3 - 10,900 7 - 21,800 26 - 87,200 7.5N
CPE-41 1.15 - 3,840 12 - 41,000 25 - 82,000 98 - 328,000 2.0N
CPE-42 .60 - 2,000 6 - 21,300 13 - 42,600 51 - 170,400 3.84N
CPE-51 4.8 - 16,178 51.8 - 172,600 103.4 - 345,200 414.2 - 1,381,000 3.84N
CPE-52 9.3 - 31,000 99.2 - 330,700 198.4 - 661,500 793.6 - 2,646,000 2.0N
Viscosity (cP)
Helipath with T-Bar Spindles
T-Bar
Spindle
LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+
T-A 156 - 62,400 2,000 - 400,000 4,000 - 800,000 16,000 - 3,200,000
T-B 312 - 124,800 4,000 - 800,000 8,000 - 1,600,000 32,000 - 6,400,000
T-C 780 - 312,000 10,000 - 2,000,000 20,000 - 4,000,000 80,000 - 16,000,000
T-D 1,560 - 624,000 20,000 - 4,000,000 40,000 - 8,000,000 160,000 - 32,000,000
T-E 3,900 - 1,560,000 50,000 - 10,000,000 100,000 - 20,000,000 400,000 - 80,000,000
T-F 7,800 - 3,120,000 100,000 - 20,000,000 200,000 - 40,000,000 800,000 - 160,000,000
Viscosity (cP)
In taking viscosity measurements with the DV-I+ Viscometer there are two considerations which
pertain to the low viscosity limit of effective measurement.
1) Viscosity measurements should be taken within the equivalent % Torque Range from
10% to 100% for any combination of spindle/speed rotation.
2) Viscosity measurements should be taken under laminar flow conditions, not under turbu-
lent flow conditions.
The first consideration has to do with the accuracy of the instrument. All DV-I+ Viscometers
have a full scale range allowable error of (+/-) 1% of any spindle/speed in use. We discourage
taking readings below 10% of range because the potential viscosity error of (+/-) 1% is a rela-
tively high number compared to the instrument reading.
The second consideration involves the mechanics of fluid flow. All rheological measurements of
fluid flow properties should be made under laminar flow conditions. Laminar flow is flow wherein