Brookfield DVE - II.6 Understanding Viscosity Range

AMETEK Brookeld Page 19 Manual No. M15-356-B0916
II.5 Viscosity Units
e units of viscosity display can be congured as dened in the table below.
Unit Abbreviation Unit Equivalency
cP Centipoise 100 cP = 1 P = 100 mPAS = 0.1 PAS
PAS
(Pa•S) Pascal Second 1 PAS = 1000 mPAS = 1000 cP = 10 P
mPAS
(mPa•s) Millipascal Second 1 mPAS = 1 cP = 0.01 P = 0.001 PAS
P Poise 1 P = 100 cP = 100 mPAS = 0.1 PAS
Changes to the currently displayed viscosity units are made from the Visc Units screen in the Options
Menu. To change the currently displayed Visc Units, press and hold both the SPEED UP and SPINDLE
UP arrow keys simultaneously to display the Options screen. Use the SPINDLE UP or DOWN arrow
keys to navigate to the Visc Units screen. Push the RANGE key to accept the Visc Units option. To
change the currently set viscosity units, press the spindle up or down keys to scroll to the required
value. Press the RANGE key to accept the change and return to the Default screen.
II.6Range
In the Default screen, pressing the RANGE key allows you to determine the maximum viscosity (full
scale reading) that can be measured by a spindle and speed combination when used with the specic
spring torque of the DVE Viscometer. is value represents the measured viscosity which will be
displayed when the instrument’s % torque reading is at 100. Pressing the key at any time will cause
the current viscosity display to change and show the maximum viscosity. e screen torque display
will now display 100% to indicate this special condition. e maximum viscosity and 100% value
will be displayed for as long as the RANGE key is depressed. Figure II-9 shows the RANGE function
where the No. 2 RV spindle is rotating at 10 RPM. e Full Scale Range is 4000 cP (or 4000 mPa•s).
4000 cP
10RPM 100% s02
Figure II-9
Brookeld recommends that viscosity measurements be made only when the instrument’s % torque
value is between 10 and 100. e FSR (Full Scale Range) represents the maximum value that can be
measured (100% on the torque scale). e minimum viscosity that can be measured is 10% of the
FSR (equivalent to 10 on the torque scale).
Full Scale Range is the same as Range or Autorange on previous versions of Brookeld Viscometers.
e accuracy of the Brookeld Viscometer is expressed as a percentage of the instrument’s FSR.
When using the standard LV (61-64) and RV (2-7) spindles, the instrument’s accuracy is ±1% of
the FSR (see Appendix E).