User's Manual Part 1

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The GS820 System
The GS820 System
and attach to the cable anchor on the tip of the
last boom section. If additional cable length is
required to reach the cable anchor point remove
winds from the reel without putting additional
tension on the cable reel spring. There should be
minimal tension on the cable reel spring when the
boom is fully retracted.
6. Verify the boom length indicated on the GS820
LCD. Boom length indicated should equal the
actual total boom length. The actual boom length
is the distance from the boom base pin to the head
sheave centre as measured along the boom
centreline. Depending on the exact placement of
the cable reel and the cable anchor the displayed
length may differ from the actual length.
2.5c Boom Length Calibration
Procedure № 1: Mechanical
Set-Up
1. Fully retract the boom
2. Adjust the loose wire rope at the boom tip so
that the displayed boom length matches the
actual boom length.
3. Fully extend the boom
4. Verify the boom length indicated at full boom
extension matches the actual fully extended boom
length. If not then follow Boom Length Calibration
Procedure № 2: Correct with the GS820.
2.5d Boom Length Calibration
Procedure № 2: Correct with
the GS820
If the displayed boom length does not match the
actual length of the boom retracted or extended and
if it is not possible to easily correct by following 2.6c
Boom Length Calibration Procedure № 1, then
follow this procedure. This procedure is completed in
the operators cab, it requires fully retracting, and
then fully extending the boom, as prompted by the
on screen instructions.
1. Go to menu 4) I
NSTALLATION and select 4B)
S
ENSOR CALIBRATION.
2. Enter the user password, press Enter and go to
menu 4B1) A
UTOMATIC CALIBRATION WIZARD.
3. Use Up and Down to select the length sensor,
and then press Enter to confirm communication
with the sensor is possible.
4. Start the wizard.
5. Press Enter to confirm the units that will be
used during the calibration wizard.
Cable
anchor
Cable guide
Cable
reel
Boom length
Boom
base
pin
Figure: The actual boom length. Typical installation.
Figure: Typical operation page with boom length indication
Figure: The boom length calibration wizard, confirm minimum
boom length.
CAUTION! Visually monitor remaining
length on the cable reel as the boom is
extended for the first time following
installation. This generally requires a second
person (in addition to the operator).
!
!