User's Manual Part 2
OPERATIO
OPERATIO
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3.5e Parts of Line
The load sensor often shares the weight with multiple
parts of line. For accurate load indication the GS820
must be programmed for the number of parts of line.
1. Go to menu 1) P
ARTS OF LINE.
2. Use Up and Down to select the load sensor;
typically sensor number one is associated with
sheave one (the main hoist) and sensor number
two is associated with sheave two (the auxiliary
hoist) etc. Press Enter to modify.
3. Use Up and Down to adjust the number of parts
of line.
4. Press Enter to save any changes and then
press Exit to return to the operation display.
3.6
3.6
Rated Capacity Indicators
Rated Capacity Indicators
The GS820 can be programmed to assist the
operator by indicating the working load limit (WLL)
from the crane specific rated capacity charts
according to the angle and radius information
received from the boom mounted sensors.
3.6a Display Programming
In order to indicate WLL the GS820 must be
programmed with a valid rated capacity chart
specific to the crane. The capacity chart
programmed can be verified in the Information
menu: press Menu and select “8) I
NFORMATION”
(press Exit to return to the operation display).
3.6b Crane Rigging
Under no circumstances is the GS820 a substitute
for safe operating practices. The operator must fully
understand the crane rigging and the crane rated
capacity chart to be able to correctly set the GS820
for rated capacity indication. The GS820 will not
take into account critical variables such as weather,
ground and crane conditions that will reduce the
safe working capacity of the crane.
3.6c Chart Wizard
Rated capacity indication is based on interpretation
of a selected capacity chart using boom angle and
load radius. The chart must be selected by “rigging”
the working hoist in the GS820; this is done by
following the chart wizard in menu 2) C
RANE RIGGING.
1. Go to menu 2) C
RANE RIGGING and press Enter
to start the chart wizard.
2. The first page of the chart wizard is “select
hoist”. Use Up and Down to select the hoist
and press Enter. If there is only one load
sensor in the system select “
MAIN”. With two or
more load sensors in the system the main hoist
is associated with the first load sensor in the
sensor list; the auxiliary hoist is associated with
the second sensor in the sensor list etc.
3. The steps that follow will depend on the size
and complexity of the rated capacity chart itself.
Typical steps include chart selection, outrigger
/ on rubber selection and boom length selection
(lattice cranes only). Use Up and Down to
select from the list of choices and then press
Enter to advance to the next step. For accurate
rated capacity indication the rigging
configuration selected in the chart wizard must
reflect the actual rigging of the working sheave.
IMPORTANT!
It is possible to leave the
chart wizard at any time by pressing
B
YPASS/EXIT; the GS820 will display the
message “RIGGING ABORTED”. Current capacity
chart selection may have changed, possibly
changing the rated capacity indicated by the
GS820. Always complete the chart wizard all
the way to the “Rigging ok” message before
operating the crane.
!
!
IMPORTANT!
If the chart number
information screen says “C
HART NOT
AVAILABLE”, no chart is loaded in the GS820
and “C
HART NOT USED”, the GS820 has not
been programmed to function as a rated
capacity indicator. If rated capacity indication
is required contact the person responsible for
the GS820 system installation and maintenance.
If in doubt, contact
LSI
LSI.
!
!
Figure: Select hoist menu