Operation Of Economizer - Bomag BPR 45/55 D Operating Instructions Manual

5.6 Operation of Economizer

Meaning of display LEDs/self test
The display LEDs signalize the measuring value of
the system. After the corresponding processing by
the evaluation module, the display shows a meas-
urement for the compaction of the soil. The
number of lighting LEDs symbolizes the increasing
compaction of the soil.
The measuring system is automatically started
when switching on the machine. The system first
of all runs a self test of the LED display.
Fig. 26
Self test: the LEDs come on in individual steps
from one to ten. Once all LEDs are on, the display
goes out again in single steps.
Fig. 27
After completion of the self test the system returns
to measuring operation; the status LED (red) first
of all lights permanently; this enables the detection
of possibly existing system faults.
BPR 45/55 D, BPR 55/65 D
Notes on operation
Display values higher during the first pass than
l
during the second pass: the front rounded shape
increases the contact area on loose material, a
slightly higher measuring value may be displayed.
The Economizer does not reach the maximum
l
display value, even after many passes: due to dif-
ferent soil stiffness values the maximum value
cannot be reached in each case.
The display varies during a pass by one point
l
up/down: caused by slight fluctuations in material
composition and lift height, the mean value indicat-
ed during the last pass is decisive.
The displayed value rises when changing the
l
travel direction: the effective force applied to the
soil by the vibratory plate rises when reversing the
travel direction. Correct measuring values can
only be achieved in forward and reverse travel with
maximum speed.
The display rises to the red section, while all
l
yellow LEDs are on: this signalizes that the maxi-
mum possible compaction with this vibratory plate
has been reached.
When the red status LED is permanently on,
l
but no other LED lights, the Economizer does not
detect any vibration.
The red status LED flashes, if the vibration fre-
l
quency is too low. In order to obtain comparable
Economized measuring values, the vibratory plate
must work with a predetermined frequency. Meas-
uring values obtained with low frequency cannot
be compared with values obtained with high fre-
quency.
The displayed measuring values are not plau-
l
sible: weak spots may also be located under the
layer to be compacted and thus adversely affect
compaction of the layers above. In unfavourable
cases an excessively varying material composi-
tion or moisture can influence the measuring re-
sults.
i
Note
Check the sensor on the base plate for tight fit!
Both screws must be tight.
Influence of the water content in the soil on the
l
Economizer: Display of reduced measuring values
in case of to dry or to moist material.
Influence of extension bars on the measuring
l
value: Assembling or removing extension bars
changes the contact area and the vibration ampli-
BOMAG
Operation
29