55M4300CCE00 Rev A
Before proceeding with additional calibration work check the overall performance by
moving the unloaded hook around the working envelope; i.e. high/low angles and
long/short boom. If an unacceptable variation in displayed hook weight is seen then
check geometric dimensions entered earlier, re-calibrate the no load pressure map
using more calibration angles and lengths, or proceed to add load adjustment, offset
and/or correction calibrations. Always check results at this stage after booming up.
Boom down can be checked after the full calibration is completed.
For the definition of required accuracy refer to national and international standards
applicable where the crane is in use eg SAE J159 in USA or EN13000 in Europe.
Step #14: Main boom “Unloaded boom deflection”
This procedure is used to add an allowance into the calculation of the hook radius to
compensate for main boom and/or chassis deflection due to the self weight of the
machine. A separate calibration is available for each crane configuration that also has
an individual no load calibration but is not used for configurations with boom
attachments (refer to Section 3.10).
A no load calibration should be completed before continuing with this procedure.
This procedure should only be used with machine configurations on outriggers or on
crawlers.
This calibration is done with an empty hook which should be freely suspended at all
times.
Ensure the current duty selection matches the actual crane configuration to be
calibrated.
1)
Use
“
”
or
“
”
to highlight “Unloaded boom deflection” and
press
“
”
to enter.
The display will show the current boom length and a target boom length for calibration
plus additional information about the telescoping sequence if relevant. The target value
should be ignored for this calibration if working with multi-reel or dual telescoping
mode booms.
