EVO EXPERT Manual
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MAX:
Maximum viscosity to be determined with the speed and the spindle
selected.
The ‘SPINDLE’ field together with the selected ‘SPEED’ will determine the maximum and minimum
viscosity values (from 8 to 22, from page 68 and on), as well as the existence of a shear stress
measurement (if you’re using coaxial spindles).
The ‘SPINDLE’ field appears highlighted first, in light blue background. The viscometer will only
show the spindles that are compatible with your model. Use the ‘
’ and ‘
’ keys to choose the
spindle and press ‘ENTER’ to skip to the next field.
Note:
The Heldal special spindles, from PA to PF, appears in the ‘SPINDLE’ field when
the ‘SPEED’ field show a speed value equal or lower than 12 rpm. Otherwise, these
spindles do not appear in the ‘SPINDLE’ field and they cannot be selected.
The SPEED field appears now highlighted. This field indicates the speed (revolutions per minute) at
which the test will be done. The Evo EXPERT series incorporates 56 pre-determined speeds: 0.01,
0.03, 0.05, 0.07, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.4, 1.5, 1.8, 2, 2.5, 3, 4,
5, 6, 7.5, 8, 10, 12, 15, 17, 20, 22, 25, 30, 35, 40, 45, 50, 60, 70, 75, 80, 90, 100, 105, 120, 135, 140,
150, 160, 180, 200, 250 RPM.
The viscosity of the liquid and the spindle used determine the speed (refer to tables 8 to 22).
Speed modification: once the corresponding field is selected, showing light blue background, you can
move through the pre-established speed using the ‘
’ and ‘
’ keys. If you want to keep the selected
speed, press the ‘ENTER’ key to skip to the next field.
You have also the option of configuring a stock of personalized speeds to facilitate operations. This
option is detailed in section 8.5.2 of the manual.
The field DENSITY is then highlighted. This field indicate the density of the fluid being measured. By
default we consider the density of water as a reference point, but you can select any other value.
To modify density, press ‘ENTER’. The following screen will appear:
The field for the density whole numbers appears higligthed in light blue background, ready to be
modified. The desired number can be introduced using the numerical keyboard. Press ‘ENTER’ to
validate the number. Then, the field for the decimals will change its background colour to light blue,
indicating that it is ready to be edited. Use the numerical keyboard to introduce the value desired.
Press ‘ENTER’ to validate this value. Press ‘ENTER’ again with the ‘SAVE’ option highlighted in order
to save the density value. Then, the viscometer will return to the measurement configuration menu.
NOTE:
If you modify the density, the viscometer will give its measurements in
cSt (centiStokes), whereas if you conserve the initial density (considered the
density by default), the measurements will be in cP (centipoises), P (Poise) or
mPa·s, Pa·s.
