Malvern Visco 88, User Manual, Page: 29 / 74

Making a measurement Chapter 3
Visco 88 Page 3-7
Fitting and loading the cup and bob
For a cup and bob system proceed as described here.
To insert the upper measurement system in the viscometer:
1.
Lift the chuck slightly upwards and hold it there.
2.
Push the shaft of the bob up into the chuck carefully until it clicks into place.
3.
Release the chuck and pull the shaft down a few mm. It should slide down then
click into position. If it does not, turn the measuring system slightly and repeat.
4.
Pour into the cup the volume of sample shown in the final column of the table
in
Chapter 2 . Hold the cup so that the vertical cutouts in the top

are at the
front and back as shown below:
ill 7745
5.
Gently raise

the cup onto the instrument then turn it anti-clockwise about
half a turn

to lock it in place. Pull gently downwards to check it’s held firm.
6.
The correct sample volume is when the temperature probe reaches about 5mm
into the sample. Looking through the access window, ensure that the tempera-
ture sensor is dipping about 5mm into the sample. If it’s not, add more sample.
If necessary, the cup can be filled until the sample runs out of the access win-
dows, then this spillage wiped away. Remove any excess sample through the
access window using a dropper pipette.
Now proceed to optimise the measurement system.