GREER Company
1918 East Glenwood Place
Santa Ana CA 92705
Page 5 of 44
MicroGuard
®
586 Operation/Setup Manual
W458200 REV C 10/29/02
System Description
The MicroGuard
®
586 Rated Capacity Indicator/Limiter System is a visual and audible alert system used in
the operation of industrial cranes. The System, which includes a computer, an operator’s display console, an
extension reel, and various types of cables and sensors, is designed to measure and display load weight,
calculate and display maximum capacity and percent rated capacity, display code configuration numbers, and
warn of an approaching overload or two-block condition for each crane configuration.
Please refer to pages 6 and 7 of this manual. The computer (L) provides all of the functions necessary to
read the System sensors, work out computations, and control the disconnect functions. In order to reliably
calculate crane parameters, such as load and rated capacity, and interpret the crane capacity chart and code
configuration numbers, information defining the physical characteristics of the crane has been loaded during
factory setup.
Two hydraulic pressure sensors, housed in the computer, measure the pressure in both sides of the boom
hoist cylinder. Other System sensors, mounted elsewhere on the crane, are connected to the computer via
electrical cables.
The extension reel (P) measures the extended length of the telescoping sections of the boom and enables
calculation of crane radius, load weight, and percent rated capacity. The reel-off cable (M) provides a path,
from the boom head to the computer via the extension reel computer cable (R). This path is used to signal
a possible two-block condition. The boom angle sensor (N) measures the angle of the boom.
The operator’s display console (J) translates data received from the computer and displays the actual load
weight and percent of rated capacity in the display console windows. Visual and audible warnings and
alarms activate when capacity limits are approached or exceeded, or when a two-block condition
is encountered.
This manual describes the system components and the operation of the System; it also includes maintenance
recommendations.
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