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MicroGuard 534 Rated Capacity
Limiter
The following describes the function and operation of
the Microguard 534 Rated Capacity Limiter. The sys-
tem is intended to aid the operator in the efficient op-
eration of the crane by continually monitoring the load
and warning of an approach to an overload or unsafe
condition.
WARNING
Although the system will alert the operator of
an approaching overload or unsafe condition,
it remains the responsibility of the operator to
operate the crane safely at all times.
This system must never be substituted for the
good judgment of the crane operator using safe
operating procedures. The operator is solely
responsible for safe operation of the crane.
!!THIS SYSTEM IS AN OPERATOR’S AID −
NOT A SAFETY DEVICE!!
System Description
The system monitors crane functions by means of high
accuracy sensors and continuously compares the load
with a copy of the crane capacity chart which is stored
in the computer memory. If an overload is approached,
the system warns by means of audible and visual
alarms and is configured to cause function limitation.
The MicroGuard 534 Rated Capacity Limiter provides
the operator with a continuous display of:
Rated Capacity
Actual Load
Percentage of Rated Capacity
Radius of the Load
Angle of the Main Boom
Crane Configuration
Length of the Main Boom
An additional feature of the system is the provision of
operator settable alarms. These alarms, when proper-
ly set, provide a method of obstacle avoidance. This is
achieved by means of maximum boom angle, maxi-
mum load radius, maximum boom head height, left
and right swing, and defined area alarms. These
alarms can be programmed for each job site and set
rapidly for the prevailing site conditions thereby aiding
the operator in safe operation of the crane.
Figure 1−69
Overhead Bar Graph And External Light Bar
(If Equipped)
2
3
1. Green Lights − Percent-
age of Rated Load 2. Amber Lights − Ap-
proaching Overload
3. Red Lights − Overload
1
2 3 1
Display Unit
The following is a description of the control buttons, in-
dicators, and windows on the display unit. Use them
along with Figure 1−68.
1. Bar-Graph
The Bar-Graph is a series of twelve colored lights which
gives a visual indication of how much of the crane’s ca-
pacity is being used and the rate at which an overload
is being approached. Each green light represents 10%
of the crane’s rated capacity is being used. Yellow indi-
cates 90−99.9%, and the red lights indicate an over-
load.
Note: System may be equipped with an overhead
bar graph or an external light bar which operates
similar to the bar graph on the display. Refer to
Figure 1−69.
2. Pre-Alarm indicator
The Pre-Alarm (yellow) Indicator illuminates at a pre-
set value of 90% of Maximum Rated Capacity and pro-
vides a visual indication of an approach to an overload.
MicroGuard 534 Operator's Manual
SkyAzúl, Equipment Solutions
www.skyazul.com
2
301-371-6126