EVO EXPERT Manual
31/105
If, once the values of all of the fields are confirmed, you press the ‘0N’ key, you will go on to the
measurement screen. If instead you press the ‘MEM/CLEAR’ key, you’ll return to the main menu
screen. If you press the ‘
◄
’ key, you will return to the initial screen.
8.3.1 Measurement Screen
You can access this screen by pressing the 0N key after the introduction of the measurement
parameters. The viscometer will start moving the spindle, which means that the equipment is ready
to start collecting data. We will now see an example of the data presented on screen at this stage:
As the equipment goes about collecting viscosity data (one piece of data for each rotation of the
spindle), the information on the screen will be updated. On the screen you will see:
SPINDLE: Current spindle. Selected on the previous screen.
SPEED: Revolutions per minute. Value selected on previous screen.
VISCOSITY: Viscosity value expressed in cP or mPa·s, or cSt (in the case that a density
different from the default one is introduced).
TORQUE: Certain percentage of the base scale. Percentage value of the curvature of the
spring in relation to the base of the same scale.
TEMP: Temperature of the sample (ºC or ºF).
NOTE:
Depending on the selected speed, it is possible that the speed reading
will take a few seconds or minutes to appear. It’s important that the viscometer
has made at least five rotations (which equals five measurements) before
considering the measurements to be valid, as the device needs that time to
stabilize. It’s also important to only take into account the temperature of a
stable sample.
In addition to visualizing measurements made on the sample, the user can also do other things
from this screen.
The speed field appears by default selected on this screen, highlighted in light blue background.
Using the ‘
’ and ‘
’ keys, you can increase or reduce the speed of the spindle’s rotation (RPM).
When you press one of these two keys, the rotation speed increases or decreases, respectively,
from the previous speed. This way, we can comfortably modify the turning speed without having to
leave the measurement screen.
The units in the temperature field (ºC and ºF) can be modified using the same process but you will
have to use the ‘
►
' key to select the appropriate field first. The selected field will appear in light
blue background.
The instrument allows switching between the viscosity and the Shear Rate and Shear Stress by
pressing the ‘ENTER’ key. This feature is not activated for the spindles that Shear Rate and Shear
Stress are not applicable, such as the standard Spindles (L1 to L4 and R1 to R7).
