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PAT America, Inc.
Push this button when you want the analog meter to display the actual boom
angle. The button will light to indicate that the Boom Angle is being displayed. The
angle displayed is the angle between the longitudinal centerline of the boom
base section and the horizontal plane.
This button is only used on the HLAP Indicator.
If the A-2-B circuit is "open" the warning light "A- 2-B" comes on and a shut off relay
is utilized to stop specific crane functions, if the crane is equipped with a crane
function shut-off system.
momentary "By Pass" key switch in the panel. If the A-2-B switch is activated and
the "By Pass" key switch is used, the A-2-B warning light will remain on until the
pending 2-Block condition ceases.
The shut off function can be by-passed using the momentary "By Pass" key switch in the panel.
THE
BYPASS
DISCRETION, AS UNWARRANTED USE OF IT TO OVERRIDE
THE CRANE FUNCTION SHUT OFF SYSTEM COULD RESULT
IN LOSS OF LIFE, DESTRUCTION OF PROPERTY AND/OR
IRREPARABLE DAMAGE TO THE CRANE.
MUST BE USED WHEN USING THE BYPASS KEY.
Integrated into the back of the panel is an electronic beeper which is activated by:
1. Open A-2-B circuit
2. If the pre-set Upper or Lower Angle limits are reached or exceeded.
The audible alarm can be silenced by pushing the HORN button. The audible alarm will
automatically be reactivated for both functions after leaving the limited values for angle preset
or pending two-block condition.
Page 6
6. "A" ANGLE PUSH BUTTON
7.
A-2-B WARNING LIGHT
The shut off function can be by-passed using the
8.
BY-PASS KEY SWITCH
W A R N I N G
KEY
SWITCH
9.
AUDIBLE ALARM
SHOULD
BE
USED
SOUND JUDGEMENT
H(L)AP - AA 103 - Operator (RE699)
WITH
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