User's Manual

GM085_ENG_rev.docx www.loadsystems.com 5
that determined at the minimum
boom angle.
Figure 8: Chain length adjustment - Maximum boom
angle
Chain length adjustment No.3 – speed
test: Lower the boom until the weight
height becomes visually clear to the
operator. Repeatedly create two-block,
progressively hoisting faster, to ensure
that the warning and lockout work within
acceptable amount of time and distance.
Increase the length of the chain if needed.
Figure 9: Chain length adjustment
5. Operation
The radio anti-two-block is fully
functional. It does not need to be
calibrated or adjusted.
Refer to the GS375/GS550/GS820 manual
for how to add this sensor to the sensor
list to be displayed.
6. Security
The radio anti-two-block is equipped with
a failsafe power system allowing it to
instantaneously communicate an alarm
via radio signals if the battery of the
power circuit is rendered inoperative.
In the advent of a radio failure, the radio
communication protocol will generate an
alarm within 5 minutes of the loss of
signal.
7. Battery replacement
After a period of about 4 years, the
battery may need to be replaced. To
ensure the same performance as the
supplied battery, replace with:
3.6V lithium D cell
If this type of battery is not available, this
type can be used but with a reduced life:
1.5V Alkaline D cell
To replace a battery, unscrew the 4 cover
bolts of the battery cover and remove it.
Change the battery, verify that the o-ring
is clean & in good shape and re-install the
battery cover.
IMPORTANT!
To increase chain length, only use
lightweight chain