M19-2101 REVISION 2.0 DVNEXT RHEOMETER - OPERATIONAL MANUAL
1. INTRODUCTION
AMETEK Brookfield has been the world leader in viscosity measurement instruments for over 85 years. The DVNext
Rheometer is AMETEK Brookfield’s latest model that incorporates new advanced features that our customers have
been asking for with the repeatability and reliability you expect from us.
Standard Version Compliant Version
• Digital Leveling
• Ethernet Connectivity
• Start-up Wizard
• Gel-Timer Functionality
• Optional Magnetic Coupling Attachment
(replaces EZ-lock)
• Optional Barcode Scanner
• Hand-held Scanner for Barcode Detection
• Accessory Detection with Barcode Detection
• Magnetic Coupling Attachment (replaces EZ-
Lock)
• Compliance to 21 CFR 11 in Stand-alone and
GAMP Compliant
• LIMS Connectivity
• Printing to non-editable PDF
The AMETEK Brookfield DVNext Rheometer 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 science of viscosity in the AMETEK Brookfield
publication “More Solutions to Sticky Problems”.
This manual covers the DVNext Rheometer. The DVNext oers exceptional versatility in modes of control, allowing
choice of traditional standalone operation and automatic operation through programs downloaded from the PC or
with complete control by PC using AMETEK Brookfield RheocalcT Software.
• The DVNext can be used as a traditional AMETEK Brookfield rheometer for collection of single speed
viscosity data through the easy-to-use touch screen; just select the spindle and speed and read the value
from the display. [See Section 2: Getting Started]
• The DVNext can collect multiple data points through programs created directly on the touch-screen
display.
• The DVNext can make a direct measurement of yield stress when using optional vane spindles.
• The AMETEK Brookfield RheocalcT Software will perform all control and data collection functions of the
DVNext from the PC while also providing a platform for advanced data collection and analysis.
In any of these modes of control, the DVNext will provide the best in viscosity measurement and control. The
principal of operation of the DVNext 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 DVNext (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 oered by AMETEK Brookfield:
Spring Torque
Model dyne•cm milliNewton•m
dyn•cm mN•m
DVNEXT LV 673.7 0.0673
DVNEXT RV 7,187.0 0.7187
DVNEXT HA 14,374.0 1.4374
DVNEXT HB 57,469.0 5.7469
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