Fayat Group Dynapac CA25 Instruction Manual page 47

Fig. Main components:
1. Display of CMV
2. Sensor and process unit.
02-17-2021
Dynapac Compaction Meter (DCM) including Active
Bouncing Control (ABC) - Optional
The Compaction Meter is an accessory used to
ensure the compaction result and enables optimal
material processing. Your system allows you to
choose different types of materials as a parameter,
adapting the system to the material being compacted.
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).
The Active Bouncing Control is always integrated in
the Compaction Meter and after a certain warning
time shuts off vibration if the machine is run in double-
jump (bouncing). This is to save both machine and
material as well as the operator from damages when
the machine starts to double-jump.
The Compaction Meter is available for both D and PD
machines but as the ground contact area varies a lot
on PD the readings may not give any sure
conclusions. However, ABC is still active. The ABC is
only possible to disable via the service tool.
Setting CMV limit
The compaction meter value view in display will give
the operator all
compaction; engine rpm, gear position, speed,
frequency and inclinations are in display together with
actual CMV and the limit set in brackets. Use the
buttons underneath the display to set the limit. The
scale will automatically vary between 0-75 and 0-250
depending on the current readings.
If double-jump occurs the operator will first get a
warning (!).
The sensor is fitted on the mounting plate of the main
bearing and it senses the vibrating motion of the
drum. The information is transmitted to the processor
unit where it is analyzed.
The analyzed information is presented in the display
as a digital value expressed as CMV (Compaction
Value). High or low measuring range is automatically
selected and viewed in the display. The resulting
numerical value is a relative measure of the ground
stiffness achieved.
4812325897EN
Operation - Vibration
information needed during
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