Malvern Visco 88, User Manual, Page: 16 / 74

Chapter 2 What is the Visco 88?
Page 2-6 MAN 0378
The terms in the Designation column are:
„
DIN53019 – when the cup and bob combination shown is used, the gap is
known and meets this DIN standard. For all these there is a 1:1.1 ratio between
the inner and outer cylinders. For example, 33mm is 1.1 x 30mm.
„
Infinite sea – the term used when the upper measuring system is placed in any
much larger container of the sample.
„
Wide gap – when a 25mm or 30mm cup is used with a 14mm bob, the gap is
much wider than the DIN standard. This is termed “wide gap”.
These combinations allow measurement of a wide range of viscosities and meas-
urement of materials which cause particle jamming in narrow gaps.
The outer cylinder is equipped with a bayonet fitting and the inner cylinder has a
spring-loaded chuck attachment. This makes measuring systems easy to change.
The outer cylinders have removable bases to make cleaning easier. The O rings in
the base are made of Viton. The measuring systems are made of stainless steel 316.
By default the cup and bob system has no temperature control, although it is avail-
able as an option.
Cone and plate/parallel plates
These measuring systems are used for measurement of high viscosity fluids and
pastes. An integral water jacket within the lower measuring system allows external
temperature control. The sample

is placed on the flat lower plate

and the cone

or flat (parallel) plate

is held by the chuck.
SYSTEM
switch
position
Inner
cylinder
Outer
cylinder Designation
Estimated
sample
volume
1 14 mm 15.4 mm C14 DIN53019 10ml
2 25 mm 27.5 mm C25 DIN53019 15ml
3 30 mm 33.0 mm C30 DIN53019 17ml
4 14 mm - Infinite sea -
5 25 mm - Infinite sea -
6 30 mm - Infinite sea -
7 14 mm 33.0 mm Wide gap 50ml
8 25 mm 33.0 mm Wide gap 32ml