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ADASH Ltd.
Adash 4900 – Vibrio M
Automatic detection of the machine speed
It's important to know the speed for evaluation of the machine condition. Instrument is looking for
speed in the frequency spectrum (200Hz range).It is assumed that most of the vibration energy is
located on the speed frequency. If the instrument finds significant energy level on one frequency (that
means in very narrow band) then this frequency is labelled as the speed frequency. From this
description is clear that the speed has not to be found always. If the higher level of energy is located in
the spectrum on other line then speed frequency (for example frequency of the fan blades), then the
wrong result can be displayed. However the correct speed, which must be defined for condition levels,
can be entered manually as well.
Evaluation of the machine and bearing conditions
Diagnostician is always asking a basic question after measurement: "What condition of the machine
should I assign to this measured value?"
Machine conditions are divided into 3 levels, which have the same colours like traffic lights:
1. GOOD – GREEN COLOR
Machine is in good condition, no defect is found. The operation is without restrictions.
2. ALERT - YELLOW COLOR
The beginning defect has been found on the machine. It is possible to operate with paying more
attention and planning of repair.
3. DANGER – RED COLOR
Serious defect has been found on the machine. Machine shouldn't be in operation.
Special functions are included in the instrument for detection of that three states. The overall vibration
values are coloured with appropriate colour.
The vibration limits Adash for each state are determined from the graphs, which are printed in the
Adash Limit Values of Machine and Bearing Vibrations chapter.
Fault Source Identification and Diagnostics Tool
Press the left arrow on the screen No.1 and the Fault Source Identification and Diagnostics screen
appears. For correct evaluation the speed must be defined. The instrument can do it automatically or
by user manual entry.
In the left bottom corner you see the Machine icon. The vertical bar displays the general (overall)
machine condition. This condition can be evocated by many reasons. The unit evaluates the severity
of 3 sources, which are the most occurred in the practice:
- Unbalance ( circle with heavy spot icon),
- Looseness ( shoe icon),
- Misalignment ( clutch icon).
Correspondent faults horizontal bars are in middle.
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Further technical and contact information can be found at www.adash.com
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