Flowcharts
Rev A 05/01/01 // SB
190113_A
21
Measure supply to length transducer in cable reel between terminal 1 (ground) and 3 (+12/24v)
Refer to Drawing 3 in Section 4.
Replace length potentiometer assembly. Remove slip ring body from shaft and
remove gear wheel from potentiometer axle. Unscrew mounting plate and
remove potentiometer assembly from mounting plate. Remove assembly wires
from terminal block. Connect new assembly to terminal block. Reinstall
mounting plate, gear wheel and slip rings. With boom fully retracted, reset
potentiometer by turning it slowly counter-clockwise until it reaches a soft stop.
Refer to Drawing 6 in Section 4 and adjustment Procedure 5 in Section 5.
Measure signal from length transducer in central unit. The return signal is a current output and must
be measured in series. Set Voltmeter to measure amps. Remove Wire #2 from X1:27 in the central
unit and connect one voltmeter lead to wire #2 and the other lead to X1:27. The measurement
should be between 4-20ma. 4ma with the boom fully retracted and the length potentiometer set fully
counter-clockwise to a soft stop. 20ma with the length potentiometer turned completely clockwise 10
turns to the soft stop. Refer to Drawing 3 & 6 in Section 4.
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Faulty wiring between central unit and cable reel.
Check wiring.
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Faulty wiring between central unit and length transducer. Check wiring
Correct?
NO
Measure signal from length transducer in cable reel. The return signal is a current output and must
be measured in series. Set Voltmeter to measure amps. Remove Wire #2 from X1:2 in the cable reel
and connect one voltmeter lead to wire #2 and the other lead to X1:2. The measurement should be
between 4-20ma. 4ma with the boom fully retracted and the length potentiometer set fully counter-
clockwise to a soft stop. 20ma with the length potentiometer turned completely clockwise 10 turns to
the soft stop. Refer to Drawings 3 & 6 in Section 4.
YES
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