14
SKF Machine Condition Advisor
User
Manual
How to Choose the Correct “Enveloped
Acceleration Classification” for your
Machinery
The
Env
eloped
Accel
eration
Class
ification (
CL1, CL2,
or
CL3
) you specify determines the instrument’s
“bearing vibration” alarm levels. Therefore, you
should select the Enveloped Acceleration Class that
best describes the general size and speed of the
bearings you’re measuring.
Options are:
CL1
Bearings with a bearing bore diameter between 200
mm and 500 mm and a shaft speed below 500 RPM.
CL2
(default)
Bearings with a bearing bore diameter between 200
mm and 300 mm and a shaft speed between 500
RPM and 1800 RPM.
CL3
Bearings with a bearing bore diameter between 20
mm and 150 mm and a shaft speed from 1800 RPM
to 3600 RPM.
