Model 35 Viscometer Instruction Manual
208878 Revision N, February 2013 14
5 Operation
This section describes the operating instructions for the Model 35 series
viscometers. It also includes instructions for measuring gel strength and changing
rotors, bobs, and torsion springs.
To start the test, add 350 ml of pre-stirred sample to the stainless steel sample cup.
The sample cup has a line that marks 350 ml as shown in Figure 3-2.
A scribed line on the rotor indicates proper immersion depth. Refer to Figure 3-2.
Damage to the bob shaft bearings may occur if this immersion depth is exceeded. If
other sample holders are used, the space between the bottom of the rotor and the
bottom of the sample holder should be one-half inch (1.27cm) or greater.
The standard B1 Bob is hollow and should never be used to test
samples hotter than 200
o
F (93
o
C).
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