JLG G12-55A Operator Manual - Manual (Page 142)

Section 8 - Additional Checks
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4. Verify operation with no objects in detection zone. No audible alarm.
5. Verify operation when object is in range of approximately 9 to 15 ft (2.7 to 4.5 m).
Produces pulsing audible alarm at a frequency of one per second (1 Hz).
6. Verify operation when object is in range of approximately 7 to 9 ft (2.1 to 2.7 m).
Produces pulsing audible alarm. Produces pulsing audible alarm at a frequency
of two per second (2 Hz).
7. Verify operation when object is range of approximately 5 to 7 ft (1.5 to 2.1 m)
Produces pulsing audible alarm at a frequency of four per second (4 Hz).
8. Verify operation when object is under approximately 5 ft (1.5 m) from machine.
Produces pulsing audible alarm at a frequency of eight per second (8 Hz).