Brookfield DV-I Prime - Manual (Page 39)

Brookfield Engineering Laboratories, Inc. Page 39 Manual No. M/07-022-D0613
III. MAKING VISCOSITY MEASUREMENTS
III.1 Quick Start
Viscosity Measurement
The DV-I PRIME Viscometer uses the same methodology for viscosity measurement as the
Brookfield Dial Reading Viscometer and DV series of Digital Viscometers. If you have experience
with other Brookfield equipment, this section will give you the quick steps for taking a viscosity
reading. If you have not used a Brookfield Viscometer before, skip this section and go to Section
III .2 for a detailed description.
A) Assemble and level the viscometer (Section I.5).
B) Autozero the viscometer (Section II.1).
C) Enter the spindle number using the SELECT SPINDLE key (Section II.2).
D) Introduce the spindle into the sample and attach the spindle to the coupling nut.
NOTE: Left-hand threads.
E) Enter the speed of rotation using the ARROW KEYS and SET SPEED key (Section II.3).
F) Record % torque and viscosity.
III.2 Preparations for Making Measurements
A) VISCOMETER: The DV-I PRIME should be turned on, leveled and autozeroed. The
level is adjusted using the two feet on the bottom of the base and confirmed using the
bubble on the top of the head. Adjust the feet until bubble is inside the center target. Set
the level prior to autozero and check the level prior to each measurement.
Proper level is essential for correct operation of the DV-I PRIME.
B) SAMPLE: The fluid to be measured (sample) must be in a container. The standard spindles,
supplied with the DV-I PRIME (LV (1-4), RV (2-7), or HA/HB (2-7)), are designed to be
used with a 600 mL low form Griffin beaker (or equivalent container with a diameter of
8.25cm). The same applies to the optional RV1, HA/HB1. Many other spindle systems
are supplied from Brookfield with specific sample chambers such as the Small Sample
Adapter, UL Adapter and Thermosel.
Brookfield recommends that you use the appropriate container for the selected spindle.
You may choose to use an alternate container for convenience; however, this may have an
effect on the measured viscosity. The DV-I PRIME is calibrated considering the specified
container. Alternate containers will provide results that are repeatable but not “true.”
The LV (1-4) and RV (1-7) spindles are designed to be used with the guardleg attached.
Measurements made without the guardleg will provide repeatable results but may not
provide “true” results.