Table of Contents
Advertisement
ADASH Ltd.
Push the pad with glue to the prepared place and, while constantly pushing and turning the pad there
and back with circular movements, observe that the cement is being evenly pushed out along the
circumference of the pad. The purpose is to make the layer between the pad and the surface as thin
as possible.
! ATTENTION. CEMENT MUST NOT BE PUSHED OUT COMPLETELY!
The pushed out cement may be removed or levelled out around the pad. In the end you put a cover on
the pad.
When using the T pad, amount of the cement is dependent on the size of the gap between the ribs
and it is not so easy to determine amount of the cement to process. As with the simple pad, the
surface between the ribs must be well cleaned and degreased. The space shall be filled with the
necessary amount of the cement so that only the cylindrical part of the pad remains visible after drying
of the cement. Beetle in the surrounding cement. In the end put a cover on the pad.
Listening to Vibrations Using Headphones
A user can connect headphones to the Adash 4900 – Vibrio III instrument, since listening to a
measurement signal also enables a differentiation of a problem type. People can think that this is an
old method, which does not have a place in this modern world. The opposite is true. Analyses of gears
and low speed bearings (e.g. in paper mills) gain better quality by using the listening method. The
listening can easily be done by any maintenance person without deeper knowledge of diagnostics. If
there is a defective bearing, then distinct rumbling sound is audible in the headphones. If the bearing
is OK, then you can hear only a weak noise.
Listen at moderate volumes to avoid hearing damage.
Always remove the headphones from the ears when you move the sensor or re-connect cable.
Relationship of Measuring in Acceleration and Speed
Maintenance staffs usually use to measure often only vibrations in mm/s or inch/s (velocity) and not
vibrations in g = 9.81 m/s
vibration speed measurement only. Bearing defects are not recognisable by using velocity
measurements. If the velocity value increases due to a bearing defect, then the defect is already
serious and there is an acute danger of unexpected breakdown. The measuring of the velocity
vibration does not give early enough warning before failure of a rolling bearing.
For accurate bearing condition measurement you have to measure the acceleration vibration!
Abbreviations used in the guide
Abbreviations below are used in the User's guide
RPM
– Revolutions per minute
CPS
– Revolutions per second
RMS
– RMS value of the measured signal
PEAK – Peak value of the measured signal
HEADPHONES WARNING !
2
(acceleration). This is a relic of the past, when old equipment enabled the
9
Adash 4900 – Vibrio III
Advertisement
Table of Contents
