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Operator's Manual   

 DS 50 / 0002

10

4.2   Pre-Operation Inspection and Calibration Verification

After the electrical connections have been checked to insure that the system is properly connected for the
crane configuration, the following checks shall be made:

1.  Check the electrical wiring connecting the various parts of the system for physical damage.
2.  Check the anti two-block switches and weights for free movement.
3.  Check the spring-loaded cable reel to be sure it is free to rotate, has tension and the cable is reeled

properly.

 

 

 
 

The following tests shall be performed with care to prevent damage to the machine or injury to

personnel. Proper functioning of the system requires successful completion of these tests
before operating the machine.

 
4.  Check the anti two-block alarm light (4) and the audible alarm by performing one of the following tests

a, b, or c. If the crane is equipped with a boom extension, perform the test procedure on both the main
boom and boom extension anti two-block switches.

When checking system the operator must use caution. If the operator cannot see the load-handling device
approaching the boom nose, he/she shall have an assistant (signal person) watch the load handling
device. The operator shall be prepared to stop the machine immediately should the LMI system not
function properly. Proper operation will be indicated by:

  lighting the red warning light (4)

  sounding the audible alarm

  locking out of the hoist up and  telescope out functions

  and if the overload shutoff option is installed, a lockout of the boom down function will occur

a) By manually lifting the weight attached to the anti two-block switches. When the weight is lifted, the

audible alarm should sound, the anti two-block alarm light (4) should light.

b)  Slowly raise the main boom load-handling device to create a potential two-block condition. When the

load-handling device lifts the weight, the audible alarm should sound, the anti two- block alarm light (4)
should light and the motion of the load handling device should be stopped. Lower the load-handling
device slightly or telescope the boom in to eliminate this condition.

c)  Slowly extend (telescope) the boom to create a potential two-block condition. When the load-handling

device lifts the weight, the audible alarm (17) should sound, the anti two-block alarm light (24) should
light and the boom telescope out function should be stopped. Lower the load-handling device slightly or
telescope the boom in to eliminate this condition.

NOTE: If the crane is equipped with the overload shutoff option, a two-block condition will also lockout the
boom down function. If operating properly, the lockout feature will always permit operation of the hoist
down, telescope in, and boom up functions.

If the light and audible alarm do not function as described and the crane movements are not
stopped, the system is not working properly. The malfunction shall be corrected before
operating the crane.

Summary of Contents for DS 50

Page 1: ...Second Edition 03 18 1997 CSH con K2AA V1 0 031 300 190014_A doc LOAD MOMENT INDICATOR DS 50 0002 OPERATOR S MANUAL MANITEX...

Page 2: ......

Page 3: ...warranties of marketability and fitness for a particular purpose PAT shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing perfor...

Page 4: ......

Page 5: ...n 5 3 2 Control Identification 6 4 Pre Operational Inspection 9 4 1 Anti two block devices 9 4 2 Pre Operation Inspection and Calibration Verification 10 5 System Operation 12 5 1 Operating Mode Selec...

Page 6: ...nufacturer for specific crane operation and load limits 2 WARNINGS The LMI is an operational aid that warns a crane operator of approaching overload conditions and warns of overhoist conditions which...

Page 7: ...red in the central processor memory and evaluated in the microprocessor When limits are reached an overload warning signal is generated at the operator s console The fixed data regarding the crane suc...

Page 8: ...Operator s Manual DS 50 0002 4 Fig 1 Components of the LMI system PAT DS 50...

Page 9: ...ith an automatic test of the LMI system of lamps and audible alarm During the test the LC display shows 8 88 8 8 First the operating mode is determined by input of the operating code number System awa...

Page 10: ...rols that are described as follows Fig 2 Operating Console 1 LC Display 2 Load Moment Limit Light 3 Load Moment Prewarning Light 4 Alarm Light Anti Two Block 5 Button UP 6 Button DOWN 7 Button and Con...

Page 11: ...s condition has been reached Load Moment Prewarning Light The yellow LOAD MOMENT PRE WARNING LIGHT 3 will light up when the load on the crane reaches the defined prewarning area thus indicating that a...

Page 12: ...fer to chapter 5 3 Button OK Key for acknowledgment of an error message The correct setting of the operation mode and the reeving is of utmost importance for the proper function of the system and the...

Page 13: ...The hoist line runs through the A2B weight With even parts of hoisting line the weight shall be attached to the dead end line With odd parts of hoisting line the weight shall be attached to the line...

Page 14: ...the red warning light 4 sounding the audible alarm locking out of the hoist up and telescope out functions and if the overload shutoff option is installed a lockout of the boom down function will occ...

Page 15: ...all controls of the LMI before operating the crane see Section 3 2 Lifting a load of known weight and comparing the load to the information displayed on the LMI see Section 5 2 shall check the proper...

Page 16: ...start function automatically after system start Manually at each modification of the crane configuration by pressing key The operating mode key and the cursor keys light up The operating mode selectio...

Page 17: ...nd the cursor keys light up The reeving selection is displayed XX present reeving select reeving use cursor keys and to modify the reeving confirm selection By pressing again key The cursor keys and t...

Page 18: ...eeving selection are active the LC display serves as data display Press keys and to select the values There are 9 display positions Display Position Y Displayed Value XXXX 0 error message 1 main boom...

Page 19: ...upted so that 2 seconds later approx the cutoff relay is de energized 6 SERVICE AND MAINTENANCE Daily maintenance of the load moment indicator consists of inspecting The electrical wiring connecting t...

Page 20: ...correct the fault Faults within the electronic microprocessor shall be repaired by factory trained service personnel When these faults occur the competent service organization shall be contacted Malfu...

Page 21: ...us or angle given in the load capacity chart E03 Boom position is out of the permissible working area over front Move boom back to the permissible working area See lifting diagram in the load capacity...

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