Measuring; Preparation For A Test; Temperature Control; Loading The Sample - Thermo Scientific HAAKE Instruction Manual

13
15
2
1

Measuring

9. Measuring

9.1 Preparation for a test

9.1.1 Temperature control

The HAAKE Falling Ball Viscometer may be temperature
controlled in a temperature range from --20 C up to +150C
using liquid circulators.
Ensure that the sample to be measured is homogeneously
tempered. For this purpose a sufficient tempering time must
be provided, at least 30 minutes. Ideally, the sample was pre-
heated to the measurement temperature.
The temperature in the jacket around the measuring tube
must be maintained within a temperature tolerance of
0.03C for test temperatures between 10 up to 80C.
For test temperatures beyond these limits the tolerances
may be increased to  0.05C.
The tempering room 3 must be free of air bubbles.
Severe skin burns can be caused by contact with
hot unit parts!

9.1.2 Loading the sample

All parts of the viscometer being in direct contact with the
sample must be kept clean and dry.
A sample volume of approximately 45 cm
measuring tube 1 up to 20 mm below the rim of the tube.
Then the ball 2 is placed into the tube and the hollow stopper
13 is introduced. The liquid should reach a level just beyond
the capillary 15. The sample in the tube must be free of air
bubbles.
Only then does the measurement begin.
11
3
is poured into the