Dynapac Compaction Meter (Dcm) Including Dynapac Bouncing Control (Dbc) - Optional; Setting The Cmv Limits; Operation Cmv - Fayat Group DYNAPAC CA25 Instruction Manual

Fig. Main components:
27. CMV display
28. Sensor and processing unit.
10-03-2022
Dynapac Compaction Meter (DCM) including
Dynapac Bouncing Control (DBC) – Optional
27
The Compaction Meter is an accessory used to improve
28
compaction efficiency and efficacy. Its system allows to
choose different types of materials as a parameter,
adapting the system to the material being compacted. If the
machine is equipped with the meter, an extra display
indicates the stiffness of the surface as CMV (compaction
meter value).
DBC is integrated in the compaction meter and warns the
operator about the bouncing effect. This resource serves
to preserve both the compacted material and the machine.
The compaction meter is available for all versions, but
since contact with the ground varies a lot in version P and
PD, the readings may not be conclusive and DBC will
remain active. It is possible to deactivate active bouncing
control via the Options menu.

Setting the CMV limits

The CMV display (compaction value) will inform the
operator about the frequency and tilt together with the
current CMV level and the limits defined by the operator.
Use the buttons on the left of the display to set the limits.
The scale will switch automatically between 0-75 and 0-
150 depending on the current reading.
If bouncing occurs, the operator will receive an alert signal
(!) on the display.
The sensor is mounted on the side plate on the right over
the main bearing and detects vibration movements of the
drum. The information is transmitted to the processor unit,
where it is analysed.
The analysed information is presented in the display as a
digital value expressed in CMV (Compaction Meter Value).
The high or low interval is automatically selected and
shown on the display. The resulting numerical value is a
relative measure of identified ground stiffness.

Operation CMV

The Compaction Meter is measuring the dynamic stiffness
of the ground. CMV is affected by bearing speed, direction
(forward or backward), amplitude and vibration frequency.
DCM is less sensitive to small variation in vibration
frequency.
4812331840EN
Operation - Vibration
62