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the end condition will be met and the DVNext will end the test or move onto the next step, depending on the test
parameters.
Greater than
The test will complete or move onto the next step once the specified end condition parameter (viscosity, torque, or
temperature) measured by the device is greater than the value that is set by the user. The device will not end the test/
move onto the next step whilst the value measured is less than the value set by the user. The greater than type does
not have a tolerance option.
Less than
The test will complete or move onto the next step once the specified end condition parameter (viscosity, torque, or
temperature) measured by the device is lower than the value that is set by the user. The device will not end the test/
move onto the next step whilst the value measured is greater than the value set by the user. The less than type does
not have a tolerance option.
Stabilization
The test will complete or move onto the next step once the specified end condition parameter (viscosity, torque, or
temperature) measured by the device has stabilized. The DVNext provides the ability to set both the time period and
a tolerance for the stabilization end condition. The time period is a set length of time that the user would like the
value to stabilize over before the device deems the stabilization as successful. The time period can be set with the
maximum time allowed at 30:59. The max and min values of the tolerance and the units is dependent on what value
is being evaluated using the stabilization end condition. For temperature, the value is +/- 9.9 °C. For torque, the value
is +/- 9.9 %. For viscosity the value is +/- 1.000E+10 cP.
Peak exotherm
This option is available only to the temperature end condition parameter. The only value that can be set for this end
condition is the tolerance (+/- °C). When using this end condition, the DVNext will deem the test complete or move
onto the next step once the temperature peaks and then drops by the tolerance set as the end condition.
3.12 Additional test parameters
The Configure Viscosity Test screen includes a More/Less Bar. When pressed, the More Bar will present several
additional Test Parameters including: QC Limits, Instructions, Reports, and Density. These parameters are always
available and active regardless of the position of the More/Less Bar.
QC limits
Select an acceptable range for measurement results. The range may be defined by Viscosity, Torque, Time,
Temperature, or Shear Stress. The possible range for Viscosity and Shear Stress will be defined by the spindle and
speed selected. QC Limits are a visual and audible signal to the operator during the test. The data set does not
include an indication of QC Limits violation.
A violation of the QC Limits during the test will be indicated by a flashing yellow box around the display for the
specified parameter. Note that Time does not have a dedicated display. A violation will result in an audible beep and
a warning message (see Figure 3-39). Data will continue to be collected while the warning message is displayed. If
Viscosity or Torque are the selected for QC Limits, QC Limits will be shown during the test on the Real Time Graph if
that parameter is selected for display (see Figure 3-40). The QC Limits are represented by dashed lines.
TIP: Audible alarms may be turned off in the User Settings.
TIP: An indication of a QC Limit violation is not part of the data set. The user can record a violation by using the
Notes available when viewing test Results (see Section 3.9).
M19-2101 REVISION 2.0
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
42
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