manufacturer :      Brookfield

model :                   RVDV-I+

annotation :           Dokumente engl .

The Brookfield RVDV-I+ Vis com eter measures fluid viscosity at given shear rates. Viscosity is a measure of a fluid’s resistance to flow. You will find a detailed description of the mathematics of viscosity in the Brookfield publication “More Solutions to Sticky Problems” a copy of which was included with your DV-I+.

The principle of operation of the DV-I+ is to drive a spindle (which is immersed in the test fluid) through a calibrated spring. The viscous drag of the fluid against the spindle is measured by the spring deflection. Spring deflection is measured with a rotary transducer. The measurement range of a DV-I+ (in centipoise or milliPascal seconds) is determined by the rotational speed of the spindle, the size and shape of the spindle, the container the spindle is rotating in, and the full scale torque of the calibrated spring.

There are four basic spring torque series offered by Brookfield :

Spring Torque

Model                                                                 dyne-cm                     milli Newton-m

LVDV-I+                                                                  673.7                     0.0673

RVDV-I+                                                               7,187.0                     0.7187

HADV-I+                                                             14,374.0                     1.4374

HBDV-I+                                                             57,496.0                     5.7496

The higher the torque calibration, the higher the measurement range . The viscosity measurement range for each torque calibration may be found in Appendix B.

Input Voltage:                                                  115 VAC or 230 VAC

Input Frequency:                                             50/60 Hz

Power Consumption:                                       22 W okfield Engineering Laboratories, Inc.                                                                   Page 4        Manual No. M/92-021-O604

Temperature Sensing Range:                        -100°C to +300°C (-148°F to +572°F)

Operating Environment:                                  0°C to 40°C Temperature Range (32°F to 104°F)

Analog Torque Output:                                   0 - 1 Volt DC (0 - 100% Torque)

Analog Temperature Output:              0-4 Volt DC (10 mV/°C)

Viscosity Accuracy:                                         ±1% Full Scale Range in use

Viscosity Repeatability:                                   0.2% of Full Scale Range in Use

Temperature Accuracy:                          ±1°C: -100°C to +149°C