Brookfield YR-1 Rheometer Manual do Utilizador descarregar pdf (Página 6)

Brookeld Engineering Labs., Inc. Page 6 Manual No. M02-215-B0412

spindle. The maximum torque value is the yield point. The straight line in Figure I-3 is a repeat

of what was shown in Figure I-2. An algorithm in the YR-1 rmware converts the maximum

torque value into a yield stress value.

The shear stress measurement range of the YR-1 (in Pascals) is determined by the size and shape

of the vane spindle, and the full scale torque range of the calibrated spring.

There are four basic spring torque series offered by Brookeld:

Spring Torque

Model dyne-cm milli Newton - m

1/4RVYR-1 1,796 0.1796

RVYR-1 7,187 0.7187

HBYR-1 57,496 5.7496

5XHBYR-1 287,480 28.7480

The shear stress measurement range for the three standard (or supplied) vane spindles at each

spring torque is as follows:

SPINDLE TORQUE RANGE

SHEAR STRESS

RANGE (Pa)

V-71 1/4 RV .125-1.25

V-72 1/4 RV .5-5

V-73 1/4 RV 2.5-25

V-71 RV .5-5

V-72 RV 2-20

V-73 RV 10-100

V-71 HB 4-40

V-72 HB 16-160

V-73 HB 80-800

V-71 5xHB 20-200

V-72 5xHB 80-800

V-73 5xHB 400-4000

Table I-1

The equivalent units of measurement in the SI system are calculated using the following con-

versions:

SI CGS

Shear Stress: 1 Pascal or 1 Newton/m

= 10 dyne/cm

Torque: 1 Newton-m = 10

dyne-cm

1 2 3 4 5 6 7 8 9 10 11 ... 63 64

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Brookfield YR-1 Rheometer Manual do Utilizador Página 6