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Stress is the calculated stress based on the Speed, Torque, and Spindle.
Strain
Strain is the Apparent Strain placed on the sample. The Apparent Strain is the angular distance that the spindle
rotates in the sample.
Temperature
Temperature is the input value from a connected AMETEK Brookfield temperature probe. The DVNext is provided
with a DVP-94Y probe that can be inserted into the test sample or a water bath. The Cone/Plate version of the
DVNext can be utilized with a sample cup that includes an embedded temperature probe. Some AMETEK Brookfield
accessories include temperature probes (Thermosel) or optional chambers with embedded temperature probes
(Small Sample Adapter). The units of temperature are defined in the Global Settings section of the Settings Menu.
The temperature display will be when no temperature probe is connected.
Speed
Speed is the selected speed from the Configure Yield Test screen.
The status of the test configuration is indicated in the gray bar above the data fields. A configuration that has been
saved will be indicated by a display of the test file name. A configuration that is not saved will be indicated by a
display of Unsaved Test.
The Real Time Graph is displayed at the bottom of the Running Yield Test. This graph shows all measurements
during the test. The Y-Axis can represent any data field. The data field represented on the graph is shown by the blue
dot; for example, in Figure 4-7, Torque is shown on the graph. Any data field can be selected by touching the screen.
The Real Time Graph will indicate data points collected as part of the Test with a blue dot indicating the final point.
At the conclusion of the test, the Real Time Graph is displayed for review. Once the OK button is pressed, the screen
will transition to Results.
QC Limits will be indicated on the Real Time Graph when the selection for Y-Axis is the same as the selection for QC
Limits (see Section 3.9).
Two Command Keys are available on the Running Yield Test Screen: Stop Test and View Test.
Stop Test:
Immediately stop the current test. The user will be presented with a confirmation box. The test will
continue to run until Yes is selected in the Confirmation box. The user will be presented with the
Results screen with any data that was collected.
View Test:
Change the view from measurement to the test parameters. The View Test screen includes a live
display of temperature. View Test includes the Stop Test command key and a Back Arrow in the
Navigation Bar. The Back Arrow is used to return the display to the Running Yield Test view.
Measurement
Measurement data is viewed in the Results screen. This screen is presented at the conclusion of a test or when data
is loaded through the View Results selection from the Home Menu
The DVNext utilizes a comprehensive data format. Data files include the complete set of measurement results and
calculated values along with the test protocol. All elements of the test can be viewed in the Results screen.
The DVNext Rheometer allows for 5000 total data points per file. When viewing large data files, additional time is
required when moving from the various Results options listed below. There may be some delay on the screen while
the DVNext prepares the data.
The results screen includes several Navigation Icons and Command Keys.
Home:
M19-2101 REVISION 2.0
Return to the Home Menu.
D V N E X T R H E O M E T E R - O P E R AT I O N A L M A N U A L
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