Malvern Visco 88, Руководство пользователя

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Chapter 3 Making a measurement
Page 3-6 MAN 0378
In this table:
„
DIN – these have the 1:1.1 ratio between cup and bob described in Chapter 2 .
„
Cxx – a cylindrical measuring system of diameter xx mm. For example, C14 is
a 14mm cylinder. For DIN standards, a matching cup and bob pair is used, for
example a 27.5mm cup with 25mm bob.
„
IS (Infinite Sea) – here no outer cylinder is used; the upper measuring system
is simply dipped into the sample container.
„
WG (Wide Gap) – here a smaller bob is used inside a larger cup, for example a
14mm bob inside a 25mm cup.
„
DG – Double Gap measuring system.
„
CPyy / xx – a cone and plate measuring system of cone angle yy degrees and
diameter xx mm. The gap to use is:
„
1° cone – 0.03mm (30µm).
„
2.5° cone – 0.07mm (70µm).
„
5.4° cone – 0.15mm (150µm).
„
PPxx – a parallel plate of diameter xx mm. The dimension x mm on the line
below the PP entry is the required gap: 0.5mm, 1mm or 2mm.
Starch option
The starch option provides an elongated (95mm) double gap measuring system for
measuring starch samples. When this is used, the following applies:
„
Speed setting 5 delivers 15.7 rad
-1
/150rpm/2.5Hz and = 164s
-1
.
„
The Set 1/System 7 combination is for use with the 95mm double gap measur-
ing system. For this setup, constant C1 is 4167Pa/Nm and C2 is 10.461 rad
-1
.
Note
If measuring very low viscosity samples, before loading the measuring sys-
tem check whether the residual torque needs adjusting. This procedure is
described in Chapter 4 .
γ.
i