Brookfield DV-I Viscometer User 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