55M4500CCE00 REV A
2)
Use
“
”
or
“
”
to modify the load adjustment factor until the displayed load is
equal to the test load. Press
“
”
to accept the change, the system will confirm
the calibration is saved.
3)
Press
“
”
to return to the main calibration menu.
Carefully set the test load on the ground.
Step #18: Optional “Load offset”
This procedure is optional: one load offset factor is available per attachment
configuration and is used to increase the accuracy of the load on hook indication. This
will compensate for minor geometric errors that may come from crane manufacturing
tolerances or from the method used to take the dimensions, weights and centre of
gravity locations of attachments.
Use the load checks performed in step #17 to establish if a “load offset” is required.
“Load offset” should only be used if the load reading indicates a constant fixed load
error for the complete operating range. If the error is variable then verify all data entries
required in the dimension and calibration data section.
It is recommended that this procedure is done with the machine on outriggers or
crawlers.
A known test load is needed to perform this calibration and should be between 50% and
90% of SWL for the configuration to be calibrated. These SWL’s should be based on the
capacity with a boom angle of approximately 60° and with a fully retracted boom.
The calculated test loads should normally include the weight of the hook block and any
slings, shackles etc. that are used.
Ensure the current duty selection matches the actual crane configuration being used for
the calibration.
1)
Use
“
”
or
“
”
to highlight “load offset” and press
“
”
to enter.
Where
Load:
represents the suspended load reading and
0.00
represents the
adjustment factor (a value of 0.00 signifies that there is no applied adjustment). The
main boom must be completely retracted with an angle of approximately 60°. When
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