IKA labworldsoft - Manual (Page 62)

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Speed-dependent bearing friction (e.g. laboratory reactor LR 2000 ) should be eliminated in order to
ensure precise torque measurement and viscosity determination. For this purpose, the torque behavior
must be recorded in no-load operation (without medium) across the entire speed range. This basic
system-related bearing friction is then subtracted from the measured torque when the viscosity is
determined.
Using the Bearing friction files event block, the correlation between speed and torque can be
continuously written to a preconfigured directory on the master computer’s hard disk (e.g.:
c:\labworld\data\...). The stored results are used at a later stage for eliminating the bearing friction
when the viscosity is calculated. The bearing files have the extension *.lag to distinguish them from
other files. Step width determines the gap between the speed steps at which the pertaining torque
value is recorded.
Proceed as follows:
1. Call up the parameter window for the result block by double-clicking the appropriate
symbol.
2. Enter the step width for the speed values.
3. Confirm the entries in the parameter window with
2.