Brookfield DV-I Prime Manual de usuario descargar pdf (Pagina 5)

Brookeld Engineering Laboratories, Inc. Page 5 Manual No. M/07-022-D0613

I. INTRODUCTION

The Brookeld DV-I PRIME Viscometer measures uid viscosity at given shear rate. Viscosity

is a measure of a uid’s resistance to ow. You will nd a detailed description of the science of

viscosity in the Brookeld publication “More Solutions to Sticky Problems”, a copy of which

was included with your DV-I PRIME.

The principle of operation of the DV-I PRIME is to drive a spindle (which is immersed in the test

uid) through a calibrated spring. The viscous drag of the uid against the spindle is measured by

the spring deection. Spring deection is measured with a rotary transducer. This system provides

continuous sensing and display of the measurement during the entire test. The measurement range

of a DV-I PRIME (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 Brookeld:

Spring Torque

Model dyne-cm milli Newton-m

LVDV-I

PRIME 673.7 0.0673

RVDV-I

PRIME 7,187.0 0.7187

HADV-I

PRIME 14,374.0 1.4374

HBDV-I

PRIME 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.

Spring torque decals, on peel-off labels, are being supplied with your instrument. Please select

the appropriate decal and attach to the viscometer.

The DV-I PRIME is available with a built-in temperature probe option, which allows temperature

readout over the range -100ºC to +300ºC (-148ºF to + 572ºF). This option allows ambient

temperature measurement or temperature measurement of the sample during viscosity testing.

Contact Brookeld or your local Brookeld agent for more information on this instrument option.

All units of measurement are displayed according to either the CGS system or the SI system.

1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown

as mPa•s) on the DV-I PRIME Viscometer display.

2. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%”)

in both cases) on the DV-I PRIME Viscometer display.

3. Temperature appears in units of Celsius (shown as C) or Fahrenheit ( shown as F) on the

DV-I PRIME Viscometer display.

The following applies to DV-I PRIME Viscometers with the temperature probe option. Look for

the symbol

throughout this manual for instructions pertaining specically to DV-I PRIME

Viscometers with temperature probe option.

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