Fayat Group DYNAPAC CA5000 - Adjustable (Variable) Frequency - (Optional); Dynapac Compaction Meter (DCM) Including Active Bouncing Control (ABC) - Optional

Operation
4812158701_G.pdf2019-10-01
Adjustable (Variable) frequency - (Optional)
Fig. Function keys
1. Adjustable (Variable) frequency (LED
on)
2. Frequency, increase
3. Frequency, decrease
1
2
3
Optimum vibration speed depends on the soil type that
is to be compacted and the chosen vibration amplitude.
If double jumps occur, reduce the vibration frequency
if possible as an initial measure.
If this does not help, select a lower amplitude instead,
if possible.
Soil type(s) High amplitude Low amplitudeSoil type(s) High amplitude Low amplitude
Fine grade soils (clay and silt) 24 - 26 Hz 28 - 30 HzFine grade soils (clay and silt) 24 - 26 Hz 28 - 30 Hz
Mixed grade soils (loamy and silty) 24 - 26 Hz 29 - 31 HzMixed grade soils (loamy and silty) 24 - 26 Hz 29 - 31 Hz
Coarse grade soils (sand and gravel) 26 - 28 Hz 31 - 33 HzCoarse grade soils (sand and gravel) 26 - 28 Hz 31 - 33 Hz
Rock fill (crushed rock and rockfill) 24 - 26 Hz 31 - 33 HzRock fill (crushed rock and rockfill) 24 - 26 Hz 31 - 33 Hz
Dynapac Compaction Meter (DCM) including
Active Bouncing Control (ABC) - Optional
Fig. Principal components
1. Display with CMV view
2. Sensor/Processor unit
1
2
The Compaction Meter is an accessory used to ensure
the compaction result and enables optimal material
processing. If the Compaction Meter is mounted on
the machine, a separate view in the machine display
indicates the stiffness of the surface as a compaction
meter value (CMV, Evib1 or Evib2).
CMV is the value traditionally used on Dynapac rollers.
It is calculated based on a numerical analysis of the
vibration frequency of the drum and the harmonics the
occur as the dynamic stiffness in the compacted
material increases. CMV is a dimensionless, relative.
Evib1 and Evib 2 are calculates based on the drum
contact force on the ground and the deformation that
occurs in the compacted material. A low contact force
that causes a big deformation results in a low Evib
value. High force and low deformation consequently
results in a high Evib value. Evib1 is calculated on the
downward movement of the drum (loading phase).
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