Normal Compaction Compaction Limit, Operation

operation

COMPACTION SENSOR (MVH406 DSCPAS Only)

Compaction Analyzing System (COMPAS) is a system that uses an acceleration sensor to show real-time soil stiffness via LED's (light-emitting diode) turning on with each pass of the compactor.

This COMPAS improves compaction work efficiency because it can prevent an already properly compacted area from being compacted more than necessary and identify an area where more compaction is needed.

COMPAS also has a function to detect abnormalities such as vibration trouble (insufficient vibration frequency), ground trouble (soft soil) and other functional issues (Figure 21).

NORMAL OPERATION	COMPACTION LIMIT
(GREEN LED ON)	LED’S 1 THRU 8 ON
	PLUS RED LED ON
VIBRATION ABNORMALITY
(GREEN LED FLASHING)	SOIL PROBLEM,
	SOIL PROBLEM,
	GREEN, AND RED
	LED’S ON

COMPACTION PROGRESSION LED’S 1 THRU 8 ON

Figure 21. Compaction Sensor (COMPAS)

NOTICE

COMPAS can only show progression of the soil stiffness and is not meant to measure absolute soil density. When using COMPAS always calculate appropriate soil density by conducting proper testing such as plate load test and dynamic load test to best compliment the LED lighting progression with the actual measurement value.

Normal Compaction (Compaction Progression)

NOTICE

Not all yellow status LEDs will turn on.The progression of the yellow status LEDs depends on the type of soil being compacted. If compacting gravel (stiff soil) potentially all status LEDs will turn ON.

If compacting sand (soft soil), fewer status LED's will turn ON. Remember DO NOT over compact.

When the plate compactor is in idle mode the green LED will begin flashing and the red LED will turn on. As the engine RPM's are increased and compaction begins, the green LED will stop flashing and turn on (solid). The red LED will turn off and the #1 yellow LED will turn on. As compaction progresses the number of yellow LEDs, 2 thru 8 will turn on (Figure 22).

The number of yellow status LEDs that will turn on is soil dependent.

NORMAL OPERATION

(GREEN LED ON)

INITIAL COMPACTION YELLOW LED#1 ON

COMPACTION PROGRESSION LED’S 2 THRU 8 ON

Figure 22. Compaction Progression

Normal Compaction (Compaction Limit)

The compaction limit (Figure 23) is achieved when all the yellow LED's 1 thru 8 including the red LED are all on, depending on type of soil being compacted . At this point the machine cannot compact any further. If the compaction results are not satisfactory then check and make sure the soil type, moisture content, lift and number of passes are proper for this machine.

DURING COMPACTION YELLOW

LED’S 1 THRU 8 ON

RED LED ON