Brookfield DV2+Pro Viscometer - Manual (Page 24)

Brookfield Engineering Labs., Inc. Page 24 Manual No. M03-165-F0612
III. MAKING VISCOSITY MEASUREMENTS
III.1 Quick Start
The DV-II+Pro Viscometer uses the same methodology for viscosity measurements as the
Brookfield Dial Reading Viscometers and DV series of Digital Viscometers. If you have
experience with other Brookfield equipment, this section will give you 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 viscometer (Section I.4)
B) Turn power on
C) Autozero the viscometer (Section II.1)
D) Enter the spindle number using the SELECT SPINDLE key (Section II.2).
E) Introduce the spindle into the sample and attach the spindle to the coupling nut.
NOTE: Left-hand threads. If equipped with EZ-Lock, use the appropriate
procedure to connect the spindle [see Section II.2].
F) Enter the speed of rotation using the number pad and ENTER key (Section II.3).
G) Record % torque and viscosity.
III.2 Preparations for Making Measurements
A) VISCOMETER: The DV-II+Pro should be turned on, leveld 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 the bubble is inside the center target. Set the level prior
to autozero and check the level prior to each measurement.
The proper level is essential for correct operation of the DV-II+Pro.
B) SAMPLE: The fluid to be measured (sample) must be in a container. The standard spindles
supplied with the DV-II+Pro [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, and Vane spindles. 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-II+Pro 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) are designed to be used with the guardleg attached. Measurements
made without the guardleg will provide repeatable results but may not provide “true” results.
When comparing data with others, be sure to specify the sample container and presence/
absence of the guardleg.
Many samples must be controlled to a specific temperature for viscosity measurement. When
conditioning a sample for temperature, be sure to temperature control the container and spindle
as well as the sample.